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Investigational Med for Tourette Syndrome Promising
PHILADELPHIA — , results of a new analysis suggest.
As previously reported, the first-in-class dopamine-1 (D1) receptor antagonist reduced the primary endpoint of tic severity scores by 30% compared with placebo among 149 patients in the 12-week, phase 2b D1AMOND trial.
What was unknown, however, is whether ecopipam would affect the comorbidities of attention-deficit/hyperactivity disorder (ADHD), anxiety, obsessive-compulsive disorder (OCD), and depression that were present in two thirds of participants.
The two key findings in this post hoc analysis were “first, that patients with a nonmotor diagnosis like depression or ADHD did not do any worse in terms of tic efficacy; and second, we didn’t find any evidence that any of the nonmotor symptoms of Tourette’s got worse with ecopipam,” said study investigator Donald Gilbert, MD, professor of pediatrics and neurology at University of Cincinnati Children’s Hospital Medical Center.
Dr. Gilbert presented the results at the International Congress of Parkinson’s Disease and Movement Disorders (MDS) 2024.
No Worsening of ADHD Symptoms
Tourette syndrome affects approximately 1 in 160 children between 5 and 17 years of age in the United States, data from the Tourette Association of America show. Research has shown that 85% of patients with Tourette syndrome will have a co-occurring psychiatric condition.
Guidelines recommend Comprehensive Behavioral Intervention for Tics (CBIT) as first-line treatment for Tourette syndrome, but cost and access are barriers. The only currently approved medications to treat Tourette syndrome are antipsychotics that act on the D2 receptor, but their use is limited by the potential for weight gain, metabolic changes, drug-induced movement disorders, and risk for suicidality, said Dr. Gilbert.
The D1AMOND study randomly assigned patients aged 6-17 years with Tourette syndrome and a Yale Global Tic Severity Total Tic Scale score of at least 20 to receive a target steady-state dose of 2 mg/kg/d of oral ecopipam or placebo for a 4-week titration period, followed by an 8-week treatment phase before being tapered off the study drug.
Patients were allowed to remain on medications without D2-receptor blocking activity for anxiety, OCD, and ADHD if the dosage was stable for 4 weeks before screening and not specifically prescribed for tics.
A mixed model for repeated measures was used to assess changes in several scales administered at baseline and at weeks 4, 6, 8, and 12: the Swanson, Nolan, and Pelham Teacher and Parent Rating Scale (SNAP-IV); Pediatric Anxiety Rating Scale; Children’s Yale-Brown Obsessive-Compulsive Scale (CY-BOCS), and Children’s Depression Rating Scale–Revised (CDRS-R).
In patients with a co-occurring psychiatric condition, no significant differences were found over time between ecopipam and placebo in terms of SNAP-IV (-4.4; P = .45), Pediatric Anxiety Rating Scale (1.0; P = .62), CDRS-R (-3.2; P = .65), or CY-BOCS (-0.7; P = .76) scores.
For ADHD, the most frequent comorbidity, scores trended lower in the ecopipam group but were not significantly different from those in the placebo group. “We found no evidence that ecopipam worsened ADHD symptoms,” Dr. Gilbert said.
No Weight Gain
Suicidal ideation was reported during the dosing period in eight patients in the placebo group and none in the ecopipam group. One patient treated with ecopipam had multiple depressive episodes and dropped out of the study on day 79. Ecopipam was discontinued in another patient because of anxiety.
Notably, there was more weight gain in the placebo group than in the ecopipam group (2.4 kg vs 1.8 kg) by 12 weeks. No shifts from baseline were seen in blood glucose, A1c, total cholesterol, or triglycerides in either group.
The lack of weight gain with ecopipam is important, Dr. Gilbert stressed. “Medicines that block D2 so often cause weight gain, and a lot of our patients, unfortunately, can be heavier already,” he explained. “We don’t want to make that worse or put them at a long-term risk of type 2 diabetes.”
For patients with more severe disease, we really “do need something else besides D2-blockers in our tool kit,” he added.
Commenting on the study, Tanya Simuni, MD, co-moderator of the session and director of the Parkinson’s Disease and Movement Disorders Center, Northwestern Feinberg School of Medicine, Chicago, said the aim of assessing D1-directed medications is to reduce the negative impact of traditional antipsychotics with a theoretical benefit on hyperkinetic movement.
But the most important thing that they’ve shown is that “there was no negative effect, no liability for the nonmotor manifestations of Tourette’s. That is important because Tourette’s is not a pure motor syndrome, and psychiatric manifestations in a lot of cases are associated with more disease-related quality of life impairment compared to the motor manifestations,” said Dr. Simuni.
That said, she noted, the “ideal drug would be the one that would have benefit for both motor and nonmotor domains.”
Multiple Agents in the Pipeline
“The neuropharmacology of Tourette syndrome has long remained stagnant, and most existing treatments often fail to balance efficacy with tolerability, underscoring the urgent need for newer therapeutics,” Christos Ganos, MD, professor of neurology, University of Toronto, said in a press release.
He noted that three studies have been published on ecopipam since 2014: an 8-week, open-label trial in adults with Tourette syndrome, a 4-week, placebo-controlled crossover trial in 38 children with Tourette syndrome, and the 12-week D1AMOND trial.
“These studies demonstrated clinically meaningful reductions in tics, without relevant safety concerns or changes in Tourette syndrome-typical neuropsychiatric measures, as also shown by the abstract highlighted here,” Dr. Ganos said.
“This emerging body of research provides a solid foundation for introducing ecopipam as a novel pharmacological agent to treat tics and may motivate further work, both on the pathophysiology and pharmacotherapy of tic disorders and their associations.”
A single-arm, phase 3 trial is currently underway at 58 centers in North America and Europe investigating the long-term safety and tolerability of ecopipam over 24 months in 150 children, adolescents, and adults with Tourette syndrome. The study is expected to be completed in 2027.
Several other new medications are also under investigation including the vesicular monoamine transporter (VMAT2) inhibitors tetrabenazine, deutetrabenazine, and valbenazine; the PEDE10A inhibitor gemlapodect; the allopregnanolone antagonist sepranolone; and SCI-110, which combines dronabinol (the synthetic form of tetrahydrocannabinol) and the endocannabinoid palmitoylethanolamide.
The study was funded by Emalex Biosciences. Dr. Gilbert’s institution received research support from Emalex Biosciences and PTC Therapeutics. Dr. Gilbert has received publishing royalties from a healthcare-related publication; compensation for serving as a medical expert with Teladoc; Advanced Medical; and the National Vaccine Injury Compensation Program, US Department of Health and Human Services. Simuni reports no relevant conflicts of interest. Dr. Ganos has received honoraria for educational activities from the Movement Disorder Society and academic research support from VolkswagenStiftung.
A version of this article first appeared on Medscape.com.
PHILADELPHIA — , results of a new analysis suggest.
As previously reported, the first-in-class dopamine-1 (D1) receptor antagonist reduced the primary endpoint of tic severity scores by 30% compared with placebo among 149 patients in the 12-week, phase 2b D1AMOND trial.
What was unknown, however, is whether ecopipam would affect the comorbidities of attention-deficit/hyperactivity disorder (ADHD), anxiety, obsessive-compulsive disorder (OCD), and depression that were present in two thirds of participants.
The two key findings in this post hoc analysis were “first, that patients with a nonmotor diagnosis like depression or ADHD did not do any worse in terms of tic efficacy; and second, we didn’t find any evidence that any of the nonmotor symptoms of Tourette’s got worse with ecopipam,” said study investigator Donald Gilbert, MD, professor of pediatrics and neurology at University of Cincinnati Children’s Hospital Medical Center.
Dr. Gilbert presented the results at the International Congress of Parkinson’s Disease and Movement Disorders (MDS) 2024.
No Worsening of ADHD Symptoms
Tourette syndrome affects approximately 1 in 160 children between 5 and 17 years of age in the United States, data from the Tourette Association of America show. Research has shown that 85% of patients with Tourette syndrome will have a co-occurring psychiatric condition.
Guidelines recommend Comprehensive Behavioral Intervention for Tics (CBIT) as first-line treatment for Tourette syndrome, but cost and access are barriers. The only currently approved medications to treat Tourette syndrome are antipsychotics that act on the D2 receptor, but their use is limited by the potential for weight gain, metabolic changes, drug-induced movement disorders, and risk for suicidality, said Dr. Gilbert.
The D1AMOND study randomly assigned patients aged 6-17 years with Tourette syndrome and a Yale Global Tic Severity Total Tic Scale score of at least 20 to receive a target steady-state dose of 2 mg/kg/d of oral ecopipam or placebo for a 4-week titration period, followed by an 8-week treatment phase before being tapered off the study drug.
Patients were allowed to remain on medications without D2-receptor blocking activity for anxiety, OCD, and ADHD if the dosage was stable for 4 weeks before screening and not specifically prescribed for tics.
A mixed model for repeated measures was used to assess changes in several scales administered at baseline and at weeks 4, 6, 8, and 12: the Swanson, Nolan, and Pelham Teacher and Parent Rating Scale (SNAP-IV); Pediatric Anxiety Rating Scale; Children’s Yale-Brown Obsessive-Compulsive Scale (CY-BOCS), and Children’s Depression Rating Scale–Revised (CDRS-R).
In patients with a co-occurring psychiatric condition, no significant differences were found over time between ecopipam and placebo in terms of SNAP-IV (-4.4; P = .45), Pediatric Anxiety Rating Scale (1.0; P = .62), CDRS-R (-3.2; P = .65), or CY-BOCS (-0.7; P = .76) scores.
For ADHD, the most frequent comorbidity, scores trended lower in the ecopipam group but were not significantly different from those in the placebo group. “We found no evidence that ecopipam worsened ADHD symptoms,” Dr. Gilbert said.
No Weight Gain
Suicidal ideation was reported during the dosing period in eight patients in the placebo group and none in the ecopipam group. One patient treated with ecopipam had multiple depressive episodes and dropped out of the study on day 79. Ecopipam was discontinued in another patient because of anxiety.
Notably, there was more weight gain in the placebo group than in the ecopipam group (2.4 kg vs 1.8 kg) by 12 weeks. No shifts from baseline were seen in blood glucose, A1c, total cholesterol, or triglycerides in either group.
The lack of weight gain with ecopipam is important, Dr. Gilbert stressed. “Medicines that block D2 so often cause weight gain, and a lot of our patients, unfortunately, can be heavier already,” he explained. “We don’t want to make that worse or put them at a long-term risk of type 2 diabetes.”
For patients with more severe disease, we really “do need something else besides D2-blockers in our tool kit,” he added.
Commenting on the study, Tanya Simuni, MD, co-moderator of the session and director of the Parkinson’s Disease and Movement Disorders Center, Northwestern Feinberg School of Medicine, Chicago, said the aim of assessing D1-directed medications is to reduce the negative impact of traditional antipsychotics with a theoretical benefit on hyperkinetic movement.
But the most important thing that they’ve shown is that “there was no negative effect, no liability for the nonmotor manifestations of Tourette’s. That is important because Tourette’s is not a pure motor syndrome, and psychiatric manifestations in a lot of cases are associated with more disease-related quality of life impairment compared to the motor manifestations,” said Dr. Simuni.
That said, she noted, the “ideal drug would be the one that would have benefit for both motor and nonmotor domains.”
Multiple Agents in the Pipeline
“The neuropharmacology of Tourette syndrome has long remained stagnant, and most existing treatments often fail to balance efficacy with tolerability, underscoring the urgent need for newer therapeutics,” Christos Ganos, MD, professor of neurology, University of Toronto, said in a press release.
He noted that three studies have been published on ecopipam since 2014: an 8-week, open-label trial in adults with Tourette syndrome, a 4-week, placebo-controlled crossover trial in 38 children with Tourette syndrome, and the 12-week D1AMOND trial.
“These studies demonstrated clinically meaningful reductions in tics, without relevant safety concerns or changes in Tourette syndrome-typical neuropsychiatric measures, as also shown by the abstract highlighted here,” Dr. Ganos said.
“This emerging body of research provides a solid foundation for introducing ecopipam as a novel pharmacological agent to treat tics and may motivate further work, both on the pathophysiology and pharmacotherapy of tic disorders and their associations.”
A single-arm, phase 3 trial is currently underway at 58 centers in North America and Europe investigating the long-term safety and tolerability of ecopipam over 24 months in 150 children, adolescents, and adults with Tourette syndrome. The study is expected to be completed in 2027.
Several other new medications are also under investigation including the vesicular monoamine transporter (VMAT2) inhibitors tetrabenazine, deutetrabenazine, and valbenazine; the PEDE10A inhibitor gemlapodect; the allopregnanolone antagonist sepranolone; and SCI-110, which combines dronabinol (the synthetic form of tetrahydrocannabinol) and the endocannabinoid palmitoylethanolamide.
The study was funded by Emalex Biosciences. Dr. Gilbert’s institution received research support from Emalex Biosciences and PTC Therapeutics. Dr. Gilbert has received publishing royalties from a healthcare-related publication; compensation for serving as a medical expert with Teladoc; Advanced Medical; and the National Vaccine Injury Compensation Program, US Department of Health and Human Services. Simuni reports no relevant conflicts of interest. Dr. Ganos has received honoraria for educational activities from the Movement Disorder Society and academic research support from VolkswagenStiftung.
A version of this article first appeared on Medscape.com.
PHILADELPHIA — , results of a new analysis suggest.
As previously reported, the first-in-class dopamine-1 (D1) receptor antagonist reduced the primary endpoint of tic severity scores by 30% compared with placebo among 149 patients in the 12-week, phase 2b D1AMOND trial.
What was unknown, however, is whether ecopipam would affect the comorbidities of attention-deficit/hyperactivity disorder (ADHD), anxiety, obsessive-compulsive disorder (OCD), and depression that were present in two thirds of participants.
The two key findings in this post hoc analysis were “first, that patients with a nonmotor diagnosis like depression or ADHD did not do any worse in terms of tic efficacy; and second, we didn’t find any evidence that any of the nonmotor symptoms of Tourette’s got worse with ecopipam,” said study investigator Donald Gilbert, MD, professor of pediatrics and neurology at University of Cincinnati Children’s Hospital Medical Center.
Dr. Gilbert presented the results at the International Congress of Parkinson’s Disease and Movement Disorders (MDS) 2024.
No Worsening of ADHD Symptoms
Tourette syndrome affects approximately 1 in 160 children between 5 and 17 years of age in the United States, data from the Tourette Association of America show. Research has shown that 85% of patients with Tourette syndrome will have a co-occurring psychiatric condition.
Guidelines recommend Comprehensive Behavioral Intervention for Tics (CBIT) as first-line treatment for Tourette syndrome, but cost and access are barriers. The only currently approved medications to treat Tourette syndrome are antipsychotics that act on the D2 receptor, but their use is limited by the potential for weight gain, metabolic changes, drug-induced movement disorders, and risk for suicidality, said Dr. Gilbert.
The D1AMOND study randomly assigned patients aged 6-17 years with Tourette syndrome and a Yale Global Tic Severity Total Tic Scale score of at least 20 to receive a target steady-state dose of 2 mg/kg/d of oral ecopipam or placebo for a 4-week titration period, followed by an 8-week treatment phase before being tapered off the study drug.
Patients were allowed to remain on medications without D2-receptor blocking activity for anxiety, OCD, and ADHD if the dosage was stable for 4 weeks before screening and not specifically prescribed for tics.
A mixed model for repeated measures was used to assess changes in several scales administered at baseline and at weeks 4, 6, 8, and 12: the Swanson, Nolan, and Pelham Teacher and Parent Rating Scale (SNAP-IV); Pediatric Anxiety Rating Scale; Children’s Yale-Brown Obsessive-Compulsive Scale (CY-BOCS), and Children’s Depression Rating Scale–Revised (CDRS-R).
In patients with a co-occurring psychiatric condition, no significant differences were found over time between ecopipam and placebo in terms of SNAP-IV (-4.4; P = .45), Pediatric Anxiety Rating Scale (1.0; P = .62), CDRS-R (-3.2; P = .65), or CY-BOCS (-0.7; P = .76) scores.
For ADHD, the most frequent comorbidity, scores trended lower in the ecopipam group but were not significantly different from those in the placebo group. “We found no evidence that ecopipam worsened ADHD symptoms,” Dr. Gilbert said.
No Weight Gain
Suicidal ideation was reported during the dosing period in eight patients in the placebo group and none in the ecopipam group. One patient treated with ecopipam had multiple depressive episodes and dropped out of the study on day 79. Ecopipam was discontinued in another patient because of anxiety.
Notably, there was more weight gain in the placebo group than in the ecopipam group (2.4 kg vs 1.8 kg) by 12 weeks. No shifts from baseline were seen in blood glucose, A1c, total cholesterol, or triglycerides in either group.
The lack of weight gain with ecopipam is important, Dr. Gilbert stressed. “Medicines that block D2 so often cause weight gain, and a lot of our patients, unfortunately, can be heavier already,” he explained. “We don’t want to make that worse or put them at a long-term risk of type 2 diabetes.”
For patients with more severe disease, we really “do need something else besides D2-blockers in our tool kit,” he added.
Commenting on the study, Tanya Simuni, MD, co-moderator of the session and director of the Parkinson’s Disease and Movement Disorders Center, Northwestern Feinberg School of Medicine, Chicago, said the aim of assessing D1-directed medications is to reduce the negative impact of traditional antipsychotics with a theoretical benefit on hyperkinetic movement.
But the most important thing that they’ve shown is that “there was no negative effect, no liability for the nonmotor manifestations of Tourette’s. That is important because Tourette’s is not a pure motor syndrome, and psychiatric manifestations in a lot of cases are associated with more disease-related quality of life impairment compared to the motor manifestations,” said Dr. Simuni.
That said, she noted, the “ideal drug would be the one that would have benefit for both motor and nonmotor domains.”
Multiple Agents in the Pipeline
“The neuropharmacology of Tourette syndrome has long remained stagnant, and most existing treatments often fail to balance efficacy with tolerability, underscoring the urgent need for newer therapeutics,” Christos Ganos, MD, professor of neurology, University of Toronto, said in a press release.
He noted that three studies have been published on ecopipam since 2014: an 8-week, open-label trial in adults with Tourette syndrome, a 4-week, placebo-controlled crossover trial in 38 children with Tourette syndrome, and the 12-week D1AMOND trial.
“These studies demonstrated clinically meaningful reductions in tics, without relevant safety concerns or changes in Tourette syndrome-typical neuropsychiatric measures, as also shown by the abstract highlighted here,” Dr. Ganos said.
“This emerging body of research provides a solid foundation for introducing ecopipam as a novel pharmacological agent to treat tics and may motivate further work, both on the pathophysiology and pharmacotherapy of tic disorders and their associations.”
A single-arm, phase 3 trial is currently underway at 58 centers in North America and Europe investigating the long-term safety and tolerability of ecopipam over 24 months in 150 children, adolescents, and adults with Tourette syndrome. The study is expected to be completed in 2027.
Several other new medications are also under investigation including the vesicular monoamine transporter (VMAT2) inhibitors tetrabenazine, deutetrabenazine, and valbenazine; the PEDE10A inhibitor gemlapodect; the allopregnanolone antagonist sepranolone; and SCI-110, which combines dronabinol (the synthetic form of tetrahydrocannabinol) and the endocannabinoid palmitoylethanolamide.
The study was funded by Emalex Biosciences. Dr. Gilbert’s institution received research support from Emalex Biosciences and PTC Therapeutics. Dr. Gilbert has received publishing royalties from a healthcare-related publication; compensation for serving as a medical expert with Teladoc; Advanced Medical; and the National Vaccine Injury Compensation Program, US Department of Health and Human Services. Simuni reports no relevant conflicts of interest. Dr. Ganos has received honoraria for educational activities from the Movement Disorder Society and academic research support from VolkswagenStiftung.
A version of this article first appeared on Medscape.com.
FROM MDS 2024
Newborn Screening Programs: What Do Clinicians Need to Know?
Newborn screening programs are public health services aimed at ensuring that the close to 4 million infants born each year in the United States are screened for certain serious disorders at birth. These disorders, albeit rare, are detected in roughly 12,500 newborn babies every year.
Newborn screening isn’t new, although it has expanded and transformed over the decades. The first newborn screening test was developed in the 1960s to detect phenylketonuria (PKU).1 Since then, the number of conditions screened for has increased, with programs in every US state and territory. “Newborn screening is well established now, not experimental or newfangled,” Wendy Chung, MD, PhD, professor of pediatrics, Harvard Medical School, Boston, Massachusetts, told Neurology Reviews.
In newborn screening, blood drawn from the baby’s heel is applied to specialized filter paper, which is then subjected to several analytical methods, including tandem mass spectrometry and molecular analyses to detect biomarkers for the diseases.2 More recently, genomic sequencing is being piloted as part of consented research studies.3
Newborn screening includes not only biochemical and genetic testing, but also includes noninvasive screening for hearing loss or for critical congenital heart disease using pulse oximetry. And newborn screening goes beyond analysis of a single drop of blood. Rather, “it’s an entire system, with the goal of identifying babies with genetic disorders who otherwise have no obvious symptoms,” said Dr. Chung. Left undetected and untreated, these conditions can be associated with serious adverse outcomes and even death.
Dr. Chung described newborn screening as a “one of the most successful public health programs, supporting health equity by screening almost every US baby after birth and then bringing timely treatments when relevant even before the baby develops symptoms of a disorder.” In this way, newborn screening has “saved lives and decreased disease burdens.”
There are at present 38 core conditions that the Department of Health and Human Services (HHS) regards as the most critical to screen for and 26 secondary conditions associated with these core disorders. This is called the Recommended Uniform Screening Panel (RUSP). Guidance regarding the most appropriate application of newborn screening tests, technologies and standards are provided by the Advisory Committee on Heritable Disorders in Newborns and Children (ACHDNC).
Each state “independently determines which screening tests are performed and what follow-up is provided.”4 Information about which tests are provided by which states can be found on the “Report Card” of the National Organization for Rare Diseases (NORD).
Challenges in Expanding the Current Newborn Screening
One of the major drawbacks in the current system is that “we don’t screen for enough diseases,” according to Zhanzhi Hu, PhD, of the Department of Systems Biology and the Department of Biomedical Information, Columbia University, New York City. “There are over 10,000 rare genetic diseases, but we’re currently screening for fewer than 100,” he told Neurology Reviews. Although in the United States, there are about 700-800 drugs approved for genetic diseases, “we can’t identify patients with these diseases early enough for the ideal window when treatments are most effective.”
Moreover, it’s a “lengthy process” to add new diseases to RUSP. “New conditions are added at the pace of less than one per year, on average — even for the hundreds of diseases for which there are treatments,” he said. “If we keep going at the current pace, we won’t be able to screen for those diseases for another few hundred years.”
Speeding up the pace of including new diseases in newborn screening is challenging because “we have more diseases than we have development dollars for,” Dr. Hu said. “Big pharmaceutical companies are reluctant to invest in rare diseases because the population is so small and it’s hard and expensive to develop such drugs. So if we can identify patients first, there will be more interest in developing treatments down the road.”
On the other hand, for trials to take place, these babies have to be identified in a timely manner — which requires testing. “Right now, we have a deadlock,” Dr. Hu said. “To nominate a disease, you need an approved treatment. But to get a treatment developed, you need to identify patients suitable for a clinical trial. If you have to wait for the symptoms to show up, the damage has already manifested and is irreversible. Our chance is to recognize the disease before symptom onset and then start treatment. I would call this a ‘chicken-and-egg’ problem.”
Dr. Hu is passionate about expanding newborn screening, and he has a very personal reason. Two of his children have a rare genetic disease. “My younger son, now 13 years old, was diagnosed at a much earlier age than my older son, although he had very few symptoms at the time, because his older brother was known to have the disease. As a result of this, his outcome was much better.” By contrast, Dr. Hu’s oldest son — now age 16 — wasn’t diagnosed until he became symptomatic.
His quest led him to join forces with Dr. Chung in conducting the Genomic Uniform-screening Against Rare Disease in All Newborns (Guardian) study, which screens newborns for more than 450 genetic conditions not currently screened as part of the standard newborn screening. To date, the study — which focuses on babies born in New York City — has screened about 11,000 infants.
“To accumulate enough evidence requires screening at least 100,000 babies because one requirement for nominating a disease for national inclusion in RUSP is an ‘N of 1’ study — meaning, to identify at least one positive patient using the proposed screening method in a prospective study,” Dr. Hu explained. “Most are rare diseases with an incidence rate of around one in 100,000. So getting to that magic number of 100,000 participants should enable us to hit that ‘N of 1’ for most diseases.”
The most challenging part, according to Dr. Hu, is the requirement of a prospective study, which means that you have to conduct a large-scale study enrolling tens of thousands of families and babies. If done for individual diseases (as has been the case in the past), “this is a huge cost and very inefficient.”
In reality, he added, the true incidence of these diseases is unclear. “Incidence rates are based on historical data rather than prospective studies. We’ve already seen some diseases show up more frequently than previously recorded, while others have shown up less frequently.”
For example, in the 11,000 babies screened to date, at least three girls with Rett syndrome have been identified, which is “quite a bit higher” than what has previously been identified in the literature (ie, one in 10,000-12,000 births). “This is a highly unmet need for these families because if you can initiate early treatment — at age 1, or even younger — the outcome will be better.”
He noted that there is at least one clinical trial underway for treating Rett syndrome, which has yielded “promising” data.5 “We’re hoping that by screening for diseases like Rett and identifying patients early, this will go hand-in-hand with clinical drug development. It can speed both the approval of the treatment and the addition to the newborn screening list,” Dr. Hu stated.
Screening and Drug Development Working in Tandem
Sequencing technologies have advanced and become more sophisticated as well as less costly, so interest in expanding newborn screening through newborn genome sequencing has increased. In fact, many states currently have incorporated genetic testing into newborn screening for conditions without biochemical markers. Additionally, newborn genomic sequencing is also used for further testing in infants with abnormal biochemical screening results.6
Genomic sequencing “identifies nucleotide changes that are the underlying etiology of monogenic disorders.”6 Its use could potentially enable identification of over 500 genetic disorders for which an newborn screening assay is not currently available, said Dr. Hu.
“Molecular DNA analysis has been integrated into newborn testing either as a first- or second-tier test for several conditions, including cystic fibrosis, severe combined immunodeficiency, and spinal muscular atrophy (SMA),” Dr. Hu said.
Dr. Hu pointed to SMA to illustrate the power and potential of newborn screening working hand-in-hand with the development of new treatments. SMA is a neurodegenerative disorder caused by mutations in SMN1, which encodes survival motor neuron protein (SMN).7 Deficiencies in SMN results in loss of motor neurons with muscle weakness and, often, early death.7A pilot study, on which Dr. Chung was the senior author, used both biochemical and genetic testing of close to 4000 newborns and found an SMA carrier frequency of 1.5%. One newborn was identified who had a homozygous SMN1 gene deletion and two copies of SMN2, strongly suggesting the presence of a severe type 1 SMA phenotype.8
At age 15 days, the baby was treated with nusinersen, an injection administered into the fluid surrounding the spinal cord, and the first FDA-approved genetic treatment for SMA. At the time of study publication, the baby was 12 months old, “meeting all developmental milestones and free of any respiratory issues,” the authors report.
“Screening for SMA — which was added to the RUSP in 2018 — has dramatically transformed what used to be the most common genetic cause of death in children under the age of 2,” Dr. Chung said. “Now, a once-and-done IV infusion of genetic therapy right after screening has transformed everything, taking what used to be a lethal condition and allowing children to grow up healthy.”
Advocating for Inclusion of Diseases With No Current Treatment
At present, any condition included in the RUSP is required to have a treatment, which can be dietary, surgical/procedural, or an FDA-approved drug-based agent. Unfortunately, a wide range of neurodevelopmental diseases still have no known treatments. But lack of availability of treatment shouldn’t invalidate a disease from being included in the RUSP, because even if there is no specific treatment for the condition itself, early intervention can still be initiated to prevent some of the manifestations of the condition, said Dr. Hu.
“For example, most patients with these diseases will sooner or later undergo seizures,” Dr. Hu remarked. “We know that repeated seizures can cause brain damage. If we can diagnose the disease before the seizures start to take place, we can put preventive seizure control interventions in place, even if there is no direct ‘treatment’ for the condition itself.”
Early identification can lead to early intervention, which can have other benefits, Dr. Hu noted. “If we train the brain at a young age, when the brain is most receptive, even though a disease may be progressive and will worsen, those abilities acquired earlier will last longer and remain in place longer. When these skills are acquired later, they’re forgotten sooner. This isn’t a ‘cure,’ but it will help with functional improvement.”
Moreover, parents are “interested in knowing that their child has a condition, even if no treatment is currently available for that disorder, according to our research,” Dr. Chung said. “We found that the parents we interviewed endorsed the nonmedical utility of having access to information, even in the absence of a ‘cure,’ so they could prepare for medical issues that might arise down the road and make informed choices.”9
Nina Gold, MD, director of Prenatal Medical Genetics and associate director for Research for Massachusetts General Brigham Personalized Medicine, Boston, obtained similar findings in her own research, which is currently under review for publication. “We conducted focus groups and one-on-one interviews with parents from diverse racial and socioeconomic backgrounds. At least one parent said they didn’t want to compare their child to other children if their child might have a different developmental trajectory. They stressed that the information would be helpful, even if there was no immediate clinical utility.”
Additionally, there are an “increasing number of fetal therapies for rare disorders, so information about a genetic disease in an older child can be helpful for parents who may go on to have another pregnancy,” Dr. Gold noted.
Dr. Hu detailed several other reasons for including a wider range of disorders in the RUSP. Doing so helps families avoid a “stressful and expensive diagnostic odyssey and also provides equitable access to a diagnosis.” And if these patients are identified early, “we can connect the family with clinical trials already underway or connect them to an organization such as the Accelerating Medicines Partnership (AMP) Program Bespoke Gene Therapy Consortium (AMP BGTC). Bespoke “brings together partners from the public, private, and nonprofit sectors to foster development of gene therapies intended to treat rare genetic diseases, which affect populations too small for viable commercial development.”
Next Steps Following Screening
Rebecca Sponberg, NP, of the Children’s Hospital of Orange County, UC Irvine School of Medicine, California, is part of a broader multidisciplinary team that interfaces with parents whose newborns have screened positive for a genetic disorder. The team also includes a biochemical geneticist, a pediatric neurologist, a pediatric endocrinologist, a genetic counselor, and a social worker.
Different states and locations have different procedures for receiving test results, said Dr. Chung. In some, pediatricians are the ones who receive the results, and they are tasked with the responsibility of making sure the children can start getting appropriate care. In particular, these pediatricians are associated with centers of excellence that specialize in working with families around these conditions. Other facilities have multidisciplinary teams.
Ms. Sponberg gave an example of how the process unfolded with X-linked adrenoleukodystrophy, a rare genetic disorder that affects the white matter of the nervous system and the adrenal cortex.10 “This is the most common peroxisomal disorder, affecting one in 20,000 males,” she said. “There are several different forms of the disorder, but males are most at risk for having the cerebral form, which can lead to neurological regression and hasten death. But the regression does not appear until 4 to 12 years of age.”
A baby who screens positive on the initial newborn screening has repeat testing; and if it’s confirmed, the family meets the entire team to help them understand what the disorder is, what to expect, and how it’s monitored and managed. “Children have to be followed closely with a brain MRI every 6 months to detect brain abnormalities quickly,” Ms. Sponberg explained “And we do regular bloodwork to look for adrenocortical insufficiency.”
A child who shows concerning changes on the MRI or abnormal blood test findings is immediately seen by the relevant specialist. “So far, our center has had one patient who had MRI changes consistent with the cerebral form of the disease and the patient was immediately able to receive a bone marrow transplant,” she reported. “We don’t think this child’s condition would have been picked up so quickly or treatment initiated so rapidly if we hadn’t known about it through newborn screening.”
Educating and Involving Families
Part of the role of clinicians is to provide education regarding newborn screening to families, according to Ms. Sponberg. “In my role, I have to call parents to tell them their child screened positive for a genetic condition and that we need to proceed with confirmatory testing,” she said. “We let them know if there’s a high concern that this might be a true positive for the condition, and we offer them information so they know what to expect.”
Unfortunately, Ms. Sponberg said, in the absence of education, some families are skeptical. “When I call families directly, some think it’s a scam and it can be hard to earn their trust. We need to do a better job educating families, especially our pregnant individuals, that testing will occur and if anything is abnormal, they will receive a call.”
References
1. Levy HL. Robert Guthrie and the Trials and Tribulations of Newborn Screening. Int J Neonatal Screen. 2021 Jan 19;7(1):5. doi: 10.3390/ijns7010005.
2. Chace DH et al. Clinical Chemistry and Dried Blood Spots: Increasing Laboratory Utilization by Improved Understanding of Quantitative Challenges. Bioanalysis. 2014;6(21):2791-2794. doi: 10.4155/bio.14.237.
3. Gold NB et al. Perspectives of Rare Disease Experts on Newborn Genome Sequencing. JAMA Netw Open. 2023 May 1;6(5):e2312231. doi: 10.1001/jamanetworkopen.2023.12231.
4. Weismiller DG. Expanded Newborn Screening: Information and Resources for the Family Physician. Am Fam Physician. 2017 Jun 1;95(11):703-709. https://www.aafp.org/pubs/afp/issues/2017/0601/p703.html.
5. Neul JL et al. Trofinetide for the Treatment of Rett Syndrome: A Randomized Phase 3 Study. Nat Med. 2023 Jun;29(6):1468-1475. doi: 10.1038/s41591-023-02398-1.
6. Chen T et al. Genomic Sequencing as a First-Tier Screening Test and Outcomes of Newborn Screening. JAMA Netw Open. 2023 Sep 5;6(9):e2331162. doi: 10.1001/jamanetworkopen.2023.31162.
7. Mercuri E et al. Spinal Muscular Atrophy. Nat Rev Dis Primers. 2022 Aug 4;8(1):52. doi: 10.1038/s41572-022-00380-8.
8. Kraszewski JN et al. Pilot Study of Population-Based Newborn Screening for Spinal Muscular Atrophy in New York State. Genet Med. 2018 Jun;20(6):608-613. doi: 10.1038/gim.2017.152.
9. Timmins GT et al. Diverse Parental Perspectives of the Social and Educational Needs for Expanding Newborn Screening Through Genomic Sequencing. Public Health Genomics. 2022 Sep 15:1-8. doi: 10.1159/000526382.
10. Turk BR et al. X-linked Adrenoleukodystrophy: Pathology, Pathophysiology, Diagnostic Testing, Newborn Screening and Therapies. Int J Dev Neurosci. 2020 Feb;80(1):52-72. doi: 10.1002/jdn.10003.
Newborn screening programs are public health services aimed at ensuring that the close to 4 million infants born each year in the United States are screened for certain serious disorders at birth. These disorders, albeit rare, are detected in roughly 12,500 newborn babies every year.
Newborn screening isn’t new, although it has expanded and transformed over the decades. The first newborn screening test was developed in the 1960s to detect phenylketonuria (PKU).1 Since then, the number of conditions screened for has increased, with programs in every US state and territory. “Newborn screening is well established now, not experimental or newfangled,” Wendy Chung, MD, PhD, professor of pediatrics, Harvard Medical School, Boston, Massachusetts, told Neurology Reviews.
In newborn screening, blood drawn from the baby’s heel is applied to specialized filter paper, which is then subjected to several analytical methods, including tandem mass spectrometry and molecular analyses to detect biomarkers for the diseases.2 More recently, genomic sequencing is being piloted as part of consented research studies.3
Newborn screening includes not only biochemical and genetic testing, but also includes noninvasive screening for hearing loss or for critical congenital heart disease using pulse oximetry. And newborn screening goes beyond analysis of a single drop of blood. Rather, “it’s an entire system, with the goal of identifying babies with genetic disorders who otherwise have no obvious symptoms,” said Dr. Chung. Left undetected and untreated, these conditions can be associated with serious adverse outcomes and even death.
Dr. Chung described newborn screening as a “one of the most successful public health programs, supporting health equity by screening almost every US baby after birth and then bringing timely treatments when relevant even before the baby develops symptoms of a disorder.” In this way, newborn screening has “saved lives and decreased disease burdens.”
There are at present 38 core conditions that the Department of Health and Human Services (HHS) regards as the most critical to screen for and 26 secondary conditions associated with these core disorders. This is called the Recommended Uniform Screening Panel (RUSP). Guidance regarding the most appropriate application of newborn screening tests, technologies and standards are provided by the Advisory Committee on Heritable Disorders in Newborns and Children (ACHDNC).
Each state “independently determines which screening tests are performed and what follow-up is provided.”4 Information about which tests are provided by which states can be found on the “Report Card” of the National Organization for Rare Diseases (NORD).
Challenges in Expanding the Current Newborn Screening
One of the major drawbacks in the current system is that “we don’t screen for enough diseases,” according to Zhanzhi Hu, PhD, of the Department of Systems Biology and the Department of Biomedical Information, Columbia University, New York City. “There are over 10,000 rare genetic diseases, but we’re currently screening for fewer than 100,” he told Neurology Reviews. Although in the United States, there are about 700-800 drugs approved for genetic diseases, “we can’t identify patients with these diseases early enough for the ideal window when treatments are most effective.”
Moreover, it’s a “lengthy process” to add new diseases to RUSP. “New conditions are added at the pace of less than one per year, on average — even for the hundreds of diseases for which there are treatments,” he said. “If we keep going at the current pace, we won’t be able to screen for those diseases for another few hundred years.”
Speeding up the pace of including new diseases in newborn screening is challenging because “we have more diseases than we have development dollars for,” Dr. Hu said. “Big pharmaceutical companies are reluctant to invest in rare diseases because the population is so small and it’s hard and expensive to develop such drugs. So if we can identify patients first, there will be more interest in developing treatments down the road.”
On the other hand, for trials to take place, these babies have to be identified in a timely manner — which requires testing. “Right now, we have a deadlock,” Dr. Hu said. “To nominate a disease, you need an approved treatment. But to get a treatment developed, you need to identify patients suitable for a clinical trial. If you have to wait for the symptoms to show up, the damage has already manifested and is irreversible. Our chance is to recognize the disease before symptom onset and then start treatment. I would call this a ‘chicken-and-egg’ problem.”
Dr. Hu is passionate about expanding newborn screening, and he has a very personal reason. Two of his children have a rare genetic disease. “My younger son, now 13 years old, was diagnosed at a much earlier age than my older son, although he had very few symptoms at the time, because his older brother was known to have the disease. As a result of this, his outcome was much better.” By contrast, Dr. Hu’s oldest son — now age 16 — wasn’t diagnosed until he became symptomatic.
His quest led him to join forces with Dr. Chung in conducting the Genomic Uniform-screening Against Rare Disease in All Newborns (Guardian) study, which screens newborns for more than 450 genetic conditions not currently screened as part of the standard newborn screening. To date, the study — which focuses on babies born in New York City — has screened about 11,000 infants.
“To accumulate enough evidence requires screening at least 100,000 babies because one requirement for nominating a disease for national inclusion in RUSP is an ‘N of 1’ study — meaning, to identify at least one positive patient using the proposed screening method in a prospective study,” Dr. Hu explained. “Most are rare diseases with an incidence rate of around one in 100,000. So getting to that magic number of 100,000 participants should enable us to hit that ‘N of 1’ for most diseases.”
The most challenging part, according to Dr. Hu, is the requirement of a prospective study, which means that you have to conduct a large-scale study enrolling tens of thousands of families and babies. If done for individual diseases (as has been the case in the past), “this is a huge cost and very inefficient.”
In reality, he added, the true incidence of these diseases is unclear. “Incidence rates are based on historical data rather than prospective studies. We’ve already seen some diseases show up more frequently than previously recorded, while others have shown up less frequently.”
For example, in the 11,000 babies screened to date, at least three girls with Rett syndrome have been identified, which is “quite a bit higher” than what has previously been identified in the literature (ie, one in 10,000-12,000 births). “This is a highly unmet need for these families because if you can initiate early treatment — at age 1, or even younger — the outcome will be better.”
He noted that there is at least one clinical trial underway for treating Rett syndrome, which has yielded “promising” data.5 “We’re hoping that by screening for diseases like Rett and identifying patients early, this will go hand-in-hand with clinical drug development. It can speed both the approval of the treatment and the addition to the newborn screening list,” Dr. Hu stated.
Screening and Drug Development Working in Tandem
Sequencing technologies have advanced and become more sophisticated as well as less costly, so interest in expanding newborn screening through newborn genome sequencing has increased. In fact, many states currently have incorporated genetic testing into newborn screening for conditions without biochemical markers. Additionally, newborn genomic sequencing is also used for further testing in infants with abnormal biochemical screening results.6
Genomic sequencing “identifies nucleotide changes that are the underlying etiology of monogenic disorders.”6 Its use could potentially enable identification of over 500 genetic disorders for which an newborn screening assay is not currently available, said Dr. Hu.
“Molecular DNA analysis has been integrated into newborn testing either as a first- or second-tier test for several conditions, including cystic fibrosis, severe combined immunodeficiency, and spinal muscular atrophy (SMA),” Dr. Hu said.
Dr. Hu pointed to SMA to illustrate the power and potential of newborn screening working hand-in-hand with the development of new treatments. SMA is a neurodegenerative disorder caused by mutations in SMN1, which encodes survival motor neuron protein (SMN).7 Deficiencies in SMN results in loss of motor neurons with muscle weakness and, often, early death.7A pilot study, on which Dr. Chung was the senior author, used both biochemical and genetic testing of close to 4000 newborns and found an SMA carrier frequency of 1.5%. One newborn was identified who had a homozygous SMN1 gene deletion and two copies of SMN2, strongly suggesting the presence of a severe type 1 SMA phenotype.8
At age 15 days, the baby was treated with nusinersen, an injection administered into the fluid surrounding the spinal cord, and the first FDA-approved genetic treatment for SMA. At the time of study publication, the baby was 12 months old, “meeting all developmental milestones and free of any respiratory issues,” the authors report.
“Screening for SMA — which was added to the RUSP in 2018 — has dramatically transformed what used to be the most common genetic cause of death in children under the age of 2,” Dr. Chung said. “Now, a once-and-done IV infusion of genetic therapy right after screening has transformed everything, taking what used to be a lethal condition and allowing children to grow up healthy.”
Advocating for Inclusion of Diseases With No Current Treatment
At present, any condition included in the RUSP is required to have a treatment, which can be dietary, surgical/procedural, or an FDA-approved drug-based agent. Unfortunately, a wide range of neurodevelopmental diseases still have no known treatments. But lack of availability of treatment shouldn’t invalidate a disease from being included in the RUSP, because even if there is no specific treatment for the condition itself, early intervention can still be initiated to prevent some of the manifestations of the condition, said Dr. Hu.
“For example, most patients with these diseases will sooner or later undergo seizures,” Dr. Hu remarked. “We know that repeated seizures can cause brain damage. If we can diagnose the disease before the seizures start to take place, we can put preventive seizure control interventions in place, even if there is no direct ‘treatment’ for the condition itself.”
Early identification can lead to early intervention, which can have other benefits, Dr. Hu noted. “If we train the brain at a young age, when the brain is most receptive, even though a disease may be progressive and will worsen, those abilities acquired earlier will last longer and remain in place longer. When these skills are acquired later, they’re forgotten sooner. This isn’t a ‘cure,’ but it will help with functional improvement.”
Moreover, parents are “interested in knowing that their child has a condition, even if no treatment is currently available for that disorder, according to our research,” Dr. Chung said. “We found that the parents we interviewed endorsed the nonmedical utility of having access to information, even in the absence of a ‘cure,’ so they could prepare for medical issues that might arise down the road and make informed choices.”9
Nina Gold, MD, director of Prenatal Medical Genetics and associate director for Research for Massachusetts General Brigham Personalized Medicine, Boston, obtained similar findings in her own research, which is currently under review for publication. “We conducted focus groups and one-on-one interviews with parents from diverse racial and socioeconomic backgrounds. At least one parent said they didn’t want to compare their child to other children if their child might have a different developmental trajectory. They stressed that the information would be helpful, even if there was no immediate clinical utility.”
Additionally, there are an “increasing number of fetal therapies for rare disorders, so information about a genetic disease in an older child can be helpful for parents who may go on to have another pregnancy,” Dr. Gold noted.
Dr. Hu detailed several other reasons for including a wider range of disorders in the RUSP. Doing so helps families avoid a “stressful and expensive diagnostic odyssey and also provides equitable access to a diagnosis.” And if these patients are identified early, “we can connect the family with clinical trials already underway or connect them to an organization such as the Accelerating Medicines Partnership (AMP) Program Bespoke Gene Therapy Consortium (AMP BGTC). Bespoke “brings together partners from the public, private, and nonprofit sectors to foster development of gene therapies intended to treat rare genetic diseases, which affect populations too small for viable commercial development.”
Next Steps Following Screening
Rebecca Sponberg, NP, of the Children’s Hospital of Orange County, UC Irvine School of Medicine, California, is part of a broader multidisciplinary team that interfaces with parents whose newborns have screened positive for a genetic disorder. The team also includes a biochemical geneticist, a pediatric neurologist, a pediatric endocrinologist, a genetic counselor, and a social worker.
Different states and locations have different procedures for receiving test results, said Dr. Chung. In some, pediatricians are the ones who receive the results, and they are tasked with the responsibility of making sure the children can start getting appropriate care. In particular, these pediatricians are associated with centers of excellence that specialize in working with families around these conditions. Other facilities have multidisciplinary teams.
Ms. Sponberg gave an example of how the process unfolded with X-linked adrenoleukodystrophy, a rare genetic disorder that affects the white matter of the nervous system and the adrenal cortex.10 “This is the most common peroxisomal disorder, affecting one in 20,000 males,” she said. “There are several different forms of the disorder, but males are most at risk for having the cerebral form, which can lead to neurological regression and hasten death. But the regression does not appear until 4 to 12 years of age.”
A baby who screens positive on the initial newborn screening has repeat testing; and if it’s confirmed, the family meets the entire team to help them understand what the disorder is, what to expect, and how it’s monitored and managed. “Children have to be followed closely with a brain MRI every 6 months to detect brain abnormalities quickly,” Ms. Sponberg explained “And we do regular bloodwork to look for adrenocortical insufficiency.”
A child who shows concerning changes on the MRI or abnormal blood test findings is immediately seen by the relevant specialist. “So far, our center has had one patient who had MRI changes consistent with the cerebral form of the disease and the patient was immediately able to receive a bone marrow transplant,” she reported. “We don’t think this child’s condition would have been picked up so quickly or treatment initiated so rapidly if we hadn’t known about it through newborn screening.”
Educating and Involving Families
Part of the role of clinicians is to provide education regarding newborn screening to families, according to Ms. Sponberg. “In my role, I have to call parents to tell them their child screened positive for a genetic condition and that we need to proceed with confirmatory testing,” she said. “We let them know if there’s a high concern that this might be a true positive for the condition, and we offer them information so they know what to expect.”
Unfortunately, Ms. Sponberg said, in the absence of education, some families are skeptical. “When I call families directly, some think it’s a scam and it can be hard to earn their trust. We need to do a better job educating families, especially our pregnant individuals, that testing will occur and if anything is abnormal, they will receive a call.”
References
1. Levy HL. Robert Guthrie and the Trials and Tribulations of Newborn Screening. Int J Neonatal Screen. 2021 Jan 19;7(1):5. doi: 10.3390/ijns7010005.
2. Chace DH et al. Clinical Chemistry and Dried Blood Spots: Increasing Laboratory Utilization by Improved Understanding of Quantitative Challenges. Bioanalysis. 2014;6(21):2791-2794. doi: 10.4155/bio.14.237.
3. Gold NB et al. Perspectives of Rare Disease Experts on Newborn Genome Sequencing. JAMA Netw Open. 2023 May 1;6(5):e2312231. doi: 10.1001/jamanetworkopen.2023.12231.
4. Weismiller DG. Expanded Newborn Screening: Information and Resources for the Family Physician. Am Fam Physician. 2017 Jun 1;95(11):703-709. https://www.aafp.org/pubs/afp/issues/2017/0601/p703.html.
5. Neul JL et al. Trofinetide for the Treatment of Rett Syndrome: A Randomized Phase 3 Study. Nat Med. 2023 Jun;29(6):1468-1475. doi: 10.1038/s41591-023-02398-1.
6. Chen T et al. Genomic Sequencing as a First-Tier Screening Test and Outcomes of Newborn Screening. JAMA Netw Open. 2023 Sep 5;6(9):e2331162. doi: 10.1001/jamanetworkopen.2023.31162.
7. Mercuri E et al. Spinal Muscular Atrophy. Nat Rev Dis Primers. 2022 Aug 4;8(1):52. doi: 10.1038/s41572-022-00380-8.
8. Kraszewski JN et al. Pilot Study of Population-Based Newborn Screening for Spinal Muscular Atrophy in New York State. Genet Med. 2018 Jun;20(6):608-613. doi: 10.1038/gim.2017.152.
9. Timmins GT et al. Diverse Parental Perspectives of the Social and Educational Needs for Expanding Newborn Screening Through Genomic Sequencing. Public Health Genomics. 2022 Sep 15:1-8. doi: 10.1159/000526382.
10. Turk BR et al. X-linked Adrenoleukodystrophy: Pathology, Pathophysiology, Diagnostic Testing, Newborn Screening and Therapies. Int J Dev Neurosci. 2020 Feb;80(1):52-72. doi: 10.1002/jdn.10003.
Newborn screening programs are public health services aimed at ensuring that the close to 4 million infants born each year in the United States are screened for certain serious disorders at birth. These disorders, albeit rare, are detected in roughly 12,500 newborn babies every year.
Newborn screening isn’t new, although it has expanded and transformed over the decades. The first newborn screening test was developed in the 1960s to detect phenylketonuria (PKU).1 Since then, the number of conditions screened for has increased, with programs in every US state and territory. “Newborn screening is well established now, not experimental or newfangled,” Wendy Chung, MD, PhD, professor of pediatrics, Harvard Medical School, Boston, Massachusetts, told Neurology Reviews.
In newborn screening, blood drawn from the baby’s heel is applied to specialized filter paper, which is then subjected to several analytical methods, including tandem mass spectrometry and molecular analyses to detect biomarkers for the diseases.2 More recently, genomic sequencing is being piloted as part of consented research studies.3
Newborn screening includes not only biochemical and genetic testing, but also includes noninvasive screening for hearing loss or for critical congenital heart disease using pulse oximetry. And newborn screening goes beyond analysis of a single drop of blood. Rather, “it’s an entire system, with the goal of identifying babies with genetic disorders who otherwise have no obvious symptoms,” said Dr. Chung. Left undetected and untreated, these conditions can be associated with serious adverse outcomes and even death.
Dr. Chung described newborn screening as a “one of the most successful public health programs, supporting health equity by screening almost every US baby after birth and then bringing timely treatments when relevant even before the baby develops symptoms of a disorder.” In this way, newborn screening has “saved lives and decreased disease burdens.”
There are at present 38 core conditions that the Department of Health and Human Services (HHS) regards as the most critical to screen for and 26 secondary conditions associated with these core disorders. This is called the Recommended Uniform Screening Panel (RUSP). Guidance regarding the most appropriate application of newborn screening tests, technologies and standards are provided by the Advisory Committee on Heritable Disorders in Newborns and Children (ACHDNC).
Each state “independently determines which screening tests are performed and what follow-up is provided.”4 Information about which tests are provided by which states can be found on the “Report Card” of the National Organization for Rare Diseases (NORD).
Challenges in Expanding the Current Newborn Screening
One of the major drawbacks in the current system is that “we don’t screen for enough diseases,” according to Zhanzhi Hu, PhD, of the Department of Systems Biology and the Department of Biomedical Information, Columbia University, New York City. “There are over 10,000 rare genetic diseases, but we’re currently screening for fewer than 100,” he told Neurology Reviews. Although in the United States, there are about 700-800 drugs approved for genetic diseases, “we can’t identify patients with these diseases early enough for the ideal window when treatments are most effective.”
Moreover, it’s a “lengthy process” to add new diseases to RUSP. “New conditions are added at the pace of less than one per year, on average — even for the hundreds of diseases for which there are treatments,” he said. “If we keep going at the current pace, we won’t be able to screen for those diseases for another few hundred years.”
Speeding up the pace of including new diseases in newborn screening is challenging because “we have more diseases than we have development dollars for,” Dr. Hu said. “Big pharmaceutical companies are reluctant to invest in rare diseases because the population is so small and it’s hard and expensive to develop such drugs. So if we can identify patients first, there will be more interest in developing treatments down the road.”
On the other hand, for trials to take place, these babies have to be identified in a timely manner — which requires testing. “Right now, we have a deadlock,” Dr. Hu said. “To nominate a disease, you need an approved treatment. But to get a treatment developed, you need to identify patients suitable for a clinical trial. If you have to wait for the symptoms to show up, the damage has already manifested and is irreversible. Our chance is to recognize the disease before symptom onset and then start treatment. I would call this a ‘chicken-and-egg’ problem.”
Dr. Hu is passionate about expanding newborn screening, and he has a very personal reason. Two of his children have a rare genetic disease. “My younger son, now 13 years old, was diagnosed at a much earlier age than my older son, although he had very few symptoms at the time, because his older brother was known to have the disease. As a result of this, his outcome was much better.” By contrast, Dr. Hu’s oldest son — now age 16 — wasn’t diagnosed until he became symptomatic.
His quest led him to join forces with Dr. Chung in conducting the Genomic Uniform-screening Against Rare Disease in All Newborns (Guardian) study, which screens newborns for more than 450 genetic conditions not currently screened as part of the standard newborn screening. To date, the study — which focuses on babies born in New York City — has screened about 11,000 infants.
“To accumulate enough evidence requires screening at least 100,000 babies because one requirement for nominating a disease for national inclusion in RUSP is an ‘N of 1’ study — meaning, to identify at least one positive patient using the proposed screening method in a prospective study,” Dr. Hu explained. “Most are rare diseases with an incidence rate of around one in 100,000. So getting to that magic number of 100,000 participants should enable us to hit that ‘N of 1’ for most diseases.”
The most challenging part, according to Dr. Hu, is the requirement of a prospective study, which means that you have to conduct a large-scale study enrolling tens of thousands of families and babies. If done for individual diseases (as has been the case in the past), “this is a huge cost and very inefficient.”
In reality, he added, the true incidence of these diseases is unclear. “Incidence rates are based on historical data rather than prospective studies. We’ve already seen some diseases show up more frequently than previously recorded, while others have shown up less frequently.”
For example, in the 11,000 babies screened to date, at least three girls with Rett syndrome have been identified, which is “quite a bit higher” than what has previously been identified in the literature (ie, one in 10,000-12,000 births). “This is a highly unmet need for these families because if you can initiate early treatment — at age 1, or even younger — the outcome will be better.”
He noted that there is at least one clinical trial underway for treating Rett syndrome, which has yielded “promising” data.5 “We’re hoping that by screening for diseases like Rett and identifying patients early, this will go hand-in-hand with clinical drug development. It can speed both the approval of the treatment and the addition to the newborn screening list,” Dr. Hu stated.
Screening and Drug Development Working in Tandem
Sequencing technologies have advanced and become more sophisticated as well as less costly, so interest in expanding newborn screening through newborn genome sequencing has increased. In fact, many states currently have incorporated genetic testing into newborn screening for conditions without biochemical markers. Additionally, newborn genomic sequencing is also used for further testing in infants with abnormal biochemical screening results.6
Genomic sequencing “identifies nucleotide changes that are the underlying etiology of monogenic disorders.”6 Its use could potentially enable identification of over 500 genetic disorders for which an newborn screening assay is not currently available, said Dr. Hu.
“Molecular DNA analysis has been integrated into newborn testing either as a first- or second-tier test for several conditions, including cystic fibrosis, severe combined immunodeficiency, and spinal muscular atrophy (SMA),” Dr. Hu said.
Dr. Hu pointed to SMA to illustrate the power and potential of newborn screening working hand-in-hand with the development of new treatments. SMA is a neurodegenerative disorder caused by mutations in SMN1, which encodes survival motor neuron protein (SMN).7 Deficiencies in SMN results in loss of motor neurons with muscle weakness and, often, early death.7A pilot study, on which Dr. Chung was the senior author, used both biochemical and genetic testing of close to 4000 newborns and found an SMA carrier frequency of 1.5%. One newborn was identified who had a homozygous SMN1 gene deletion and two copies of SMN2, strongly suggesting the presence of a severe type 1 SMA phenotype.8
At age 15 days, the baby was treated with nusinersen, an injection administered into the fluid surrounding the spinal cord, and the first FDA-approved genetic treatment for SMA. At the time of study publication, the baby was 12 months old, “meeting all developmental milestones and free of any respiratory issues,” the authors report.
“Screening for SMA — which was added to the RUSP in 2018 — has dramatically transformed what used to be the most common genetic cause of death in children under the age of 2,” Dr. Chung said. “Now, a once-and-done IV infusion of genetic therapy right after screening has transformed everything, taking what used to be a lethal condition and allowing children to grow up healthy.”
Advocating for Inclusion of Diseases With No Current Treatment
At present, any condition included in the RUSP is required to have a treatment, which can be dietary, surgical/procedural, or an FDA-approved drug-based agent. Unfortunately, a wide range of neurodevelopmental diseases still have no known treatments. But lack of availability of treatment shouldn’t invalidate a disease from being included in the RUSP, because even if there is no specific treatment for the condition itself, early intervention can still be initiated to prevent some of the manifestations of the condition, said Dr. Hu.
“For example, most patients with these diseases will sooner or later undergo seizures,” Dr. Hu remarked. “We know that repeated seizures can cause brain damage. If we can diagnose the disease before the seizures start to take place, we can put preventive seizure control interventions in place, even if there is no direct ‘treatment’ for the condition itself.”
Early identification can lead to early intervention, which can have other benefits, Dr. Hu noted. “If we train the brain at a young age, when the brain is most receptive, even though a disease may be progressive and will worsen, those abilities acquired earlier will last longer and remain in place longer. When these skills are acquired later, they’re forgotten sooner. This isn’t a ‘cure,’ but it will help with functional improvement.”
Moreover, parents are “interested in knowing that their child has a condition, even if no treatment is currently available for that disorder, according to our research,” Dr. Chung said. “We found that the parents we interviewed endorsed the nonmedical utility of having access to information, even in the absence of a ‘cure,’ so they could prepare for medical issues that might arise down the road and make informed choices.”9
Nina Gold, MD, director of Prenatal Medical Genetics and associate director for Research for Massachusetts General Brigham Personalized Medicine, Boston, obtained similar findings in her own research, which is currently under review for publication. “We conducted focus groups and one-on-one interviews with parents from diverse racial and socioeconomic backgrounds. At least one parent said they didn’t want to compare their child to other children if their child might have a different developmental trajectory. They stressed that the information would be helpful, even if there was no immediate clinical utility.”
Additionally, there are an “increasing number of fetal therapies for rare disorders, so information about a genetic disease in an older child can be helpful for parents who may go on to have another pregnancy,” Dr. Gold noted.
Dr. Hu detailed several other reasons for including a wider range of disorders in the RUSP. Doing so helps families avoid a “stressful and expensive diagnostic odyssey and also provides equitable access to a diagnosis.” And if these patients are identified early, “we can connect the family with clinical trials already underway or connect them to an organization such as the Accelerating Medicines Partnership (AMP) Program Bespoke Gene Therapy Consortium (AMP BGTC). Bespoke “brings together partners from the public, private, and nonprofit sectors to foster development of gene therapies intended to treat rare genetic diseases, which affect populations too small for viable commercial development.”
Next Steps Following Screening
Rebecca Sponberg, NP, of the Children’s Hospital of Orange County, UC Irvine School of Medicine, California, is part of a broader multidisciplinary team that interfaces with parents whose newborns have screened positive for a genetic disorder. The team also includes a biochemical geneticist, a pediatric neurologist, a pediatric endocrinologist, a genetic counselor, and a social worker.
Different states and locations have different procedures for receiving test results, said Dr. Chung. In some, pediatricians are the ones who receive the results, and they are tasked with the responsibility of making sure the children can start getting appropriate care. In particular, these pediatricians are associated with centers of excellence that specialize in working with families around these conditions. Other facilities have multidisciplinary teams.
Ms. Sponberg gave an example of how the process unfolded with X-linked adrenoleukodystrophy, a rare genetic disorder that affects the white matter of the nervous system and the adrenal cortex.10 “This is the most common peroxisomal disorder, affecting one in 20,000 males,” she said. “There are several different forms of the disorder, but males are most at risk for having the cerebral form, which can lead to neurological regression and hasten death. But the regression does not appear until 4 to 12 years of age.”
A baby who screens positive on the initial newborn screening has repeat testing; and if it’s confirmed, the family meets the entire team to help them understand what the disorder is, what to expect, and how it’s monitored and managed. “Children have to be followed closely with a brain MRI every 6 months to detect brain abnormalities quickly,” Ms. Sponberg explained “And we do regular bloodwork to look for adrenocortical insufficiency.”
A child who shows concerning changes on the MRI or abnormal blood test findings is immediately seen by the relevant specialist. “So far, our center has had one patient who had MRI changes consistent with the cerebral form of the disease and the patient was immediately able to receive a bone marrow transplant,” she reported. “We don’t think this child’s condition would have been picked up so quickly or treatment initiated so rapidly if we hadn’t known about it through newborn screening.”
Educating and Involving Families
Part of the role of clinicians is to provide education regarding newborn screening to families, according to Ms. Sponberg. “In my role, I have to call parents to tell them their child screened positive for a genetic condition and that we need to proceed with confirmatory testing,” she said. “We let them know if there’s a high concern that this might be a true positive for the condition, and we offer them information so they know what to expect.”
Unfortunately, Ms. Sponberg said, in the absence of education, some families are skeptical. “When I call families directly, some think it’s a scam and it can be hard to earn their trust. We need to do a better job educating families, especially our pregnant individuals, that testing will occur and if anything is abnormal, they will receive a call.”
References
1. Levy HL. Robert Guthrie and the Trials and Tribulations of Newborn Screening. Int J Neonatal Screen. 2021 Jan 19;7(1):5. doi: 10.3390/ijns7010005.
2. Chace DH et al. Clinical Chemistry and Dried Blood Spots: Increasing Laboratory Utilization by Improved Understanding of Quantitative Challenges. Bioanalysis. 2014;6(21):2791-2794. doi: 10.4155/bio.14.237.
3. Gold NB et al. Perspectives of Rare Disease Experts on Newborn Genome Sequencing. JAMA Netw Open. 2023 May 1;6(5):e2312231. doi: 10.1001/jamanetworkopen.2023.12231.
4. Weismiller DG. Expanded Newborn Screening: Information and Resources for the Family Physician. Am Fam Physician. 2017 Jun 1;95(11):703-709. https://www.aafp.org/pubs/afp/issues/2017/0601/p703.html.
5. Neul JL et al. Trofinetide for the Treatment of Rett Syndrome: A Randomized Phase 3 Study. Nat Med. 2023 Jun;29(6):1468-1475. doi: 10.1038/s41591-023-02398-1.
6. Chen T et al. Genomic Sequencing as a First-Tier Screening Test and Outcomes of Newborn Screening. JAMA Netw Open. 2023 Sep 5;6(9):e2331162. doi: 10.1001/jamanetworkopen.2023.31162.
7. Mercuri E et al. Spinal Muscular Atrophy. Nat Rev Dis Primers. 2022 Aug 4;8(1):52. doi: 10.1038/s41572-022-00380-8.
8. Kraszewski JN et al. Pilot Study of Population-Based Newborn Screening for Spinal Muscular Atrophy in New York State. Genet Med. 2018 Jun;20(6):608-613. doi: 10.1038/gim.2017.152.
9. Timmins GT et al. Diverse Parental Perspectives of the Social and Educational Needs for Expanding Newborn Screening Through Genomic Sequencing. Public Health Genomics. 2022 Sep 15:1-8. doi: 10.1159/000526382.
10. Turk BR et al. X-linked Adrenoleukodystrophy: Pathology, Pathophysiology, Diagnostic Testing, Newborn Screening and Therapies. Int J Dev Neurosci. 2020 Feb;80(1):52-72. doi: 10.1002/jdn.10003.
Brain Structure Differs in Youth With Conduct Disorder
Youth with conduct disorder (CD) have extensive brain structure differences, new research showed.
“We know very little about this disorder even though it can carry a high burden for families and societies,” co–lead author Yidian Gao, PhD, of the University of Birmingham, Birmingham, England, said in a press release.
“The sample included in our study is 10-20 times larger than previous studies and contains data on children from North America, Europe, and Asia. It provides the most compelling evidence to date that CD is associated with widespread structural brain differences,” he added.
The findings were published online in The Lancet Psychiatry.
An Understudied Disorder
In the largest study of its kind, researchers at the Universities of Bath and Birmingham, both in England, collaborated with research teams across Europe, North America, and Asia, as part of the Enhancing NeuroImaging Genetics through Meta-Analysis–Antisocial Behavior Working Group to learn more about one of the “least researched psychiatric disorders,” they wrote.
The investigators used MRI to examine the brain structure of 1185 children with a clinical diagnosis of CD and 1253 typically developing children from 17-21 across 15 international study cohorts.
After adjusting for total intracranial volume investigators found that youth with CD (29% women; mean age, 13.7 years) had lower total surface area and lower regional surface area in 26 of the 34 cortical regions, spanning all four lobes of the brain, compared with their typically developing counterparts (35.6% women; mean age, 13.5 years).
Youth with CD also showed greater cortical thickness in the caudal anterior cingulate cortex (P = .0001) and lower cortical thickness in the banks of the superior temporal sulcus vs those without CD (P = .0010).
In addition, the CD group also had lower volume in the thalamus (P = .0009), amygdala (P = .0014), hippocampus (P = .0031), and nucleus accumbens (P = .0052).
Most findings remained significant after adjusting for intelligence quotient, psychiatric comorbidities, and psychotropic medication use. Of note, group difference in cortical thickness, 22 of 27 differences in surface area. In addition, three of four subcortical differences remained robust after adjusting for co-occurring attention-deficit/hyperactivity disorder, the most frequent comorbidity.
When the investigators divided individuals with CD into two subgroups — those with high vs low levels of callous-unemotional traits — they found limited overall differences. However, those with high callous-unemotional traits had lower surface area in the superior temporal and superior frontal gyri vs those with low callous-unemotional traits and the typically developing group.
Investigators also found that individuals with childhood-onset CD had greater cortical thickness in the caudal anterior cingulate cortex compared with those with adolescent-onset CD.
Study limitations include comparison of different cohorts with differing protocols that could affect the validity of the findings. In addition, subgroup samples were small and had lower statistical power.
“Our finding of robust brain alterations in conduct disorder — similar to those in more widely recognized and widely treated disorders such as ADHD — emphasize the need for a greater focus on conduct disorder in research, treatment, and public policy,” the authors noted.
Seven study authors reported conflicts of interest with various pharmaceutical companies and other organizations.
A version of this article first appeared on Medscape.com.
Youth with conduct disorder (CD) have extensive brain structure differences, new research showed.
“We know very little about this disorder even though it can carry a high burden for families and societies,” co–lead author Yidian Gao, PhD, of the University of Birmingham, Birmingham, England, said in a press release.
“The sample included in our study is 10-20 times larger than previous studies and contains data on children from North America, Europe, and Asia. It provides the most compelling evidence to date that CD is associated with widespread structural brain differences,” he added.
The findings were published online in The Lancet Psychiatry.
An Understudied Disorder
In the largest study of its kind, researchers at the Universities of Bath and Birmingham, both in England, collaborated with research teams across Europe, North America, and Asia, as part of the Enhancing NeuroImaging Genetics through Meta-Analysis–Antisocial Behavior Working Group to learn more about one of the “least researched psychiatric disorders,” they wrote.
The investigators used MRI to examine the brain structure of 1185 children with a clinical diagnosis of CD and 1253 typically developing children from 17-21 across 15 international study cohorts.
After adjusting for total intracranial volume investigators found that youth with CD (29% women; mean age, 13.7 years) had lower total surface area and lower regional surface area in 26 of the 34 cortical regions, spanning all four lobes of the brain, compared with their typically developing counterparts (35.6% women; mean age, 13.5 years).
Youth with CD also showed greater cortical thickness in the caudal anterior cingulate cortex (P = .0001) and lower cortical thickness in the banks of the superior temporal sulcus vs those without CD (P = .0010).
In addition, the CD group also had lower volume in the thalamus (P = .0009), amygdala (P = .0014), hippocampus (P = .0031), and nucleus accumbens (P = .0052).
Most findings remained significant after adjusting for intelligence quotient, psychiatric comorbidities, and psychotropic medication use. Of note, group difference in cortical thickness, 22 of 27 differences in surface area. In addition, three of four subcortical differences remained robust after adjusting for co-occurring attention-deficit/hyperactivity disorder, the most frequent comorbidity.
When the investigators divided individuals with CD into two subgroups — those with high vs low levels of callous-unemotional traits — they found limited overall differences. However, those with high callous-unemotional traits had lower surface area in the superior temporal and superior frontal gyri vs those with low callous-unemotional traits and the typically developing group.
Investigators also found that individuals with childhood-onset CD had greater cortical thickness in the caudal anterior cingulate cortex compared with those with adolescent-onset CD.
Study limitations include comparison of different cohorts with differing protocols that could affect the validity of the findings. In addition, subgroup samples were small and had lower statistical power.
“Our finding of robust brain alterations in conduct disorder — similar to those in more widely recognized and widely treated disorders such as ADHD — emphasize the need for a greater focus on conduct disorder in research, treatment, and public policy,” the authors noted.
Seven study authors reported conflicts of interest with various pharmaceutical companies and other organizations.
A version of this article first appeared on Medscape.com.
Youth with conduct disorder (CD) have extensive brain structure differences, new research showed.
“We know very little about this disorder even though it can carry a high burden for families and societies,” co–lead author Yidian Gao, PhD, of the University of Birmingham, Birmingham, England, said in a press release.
“The sample included in our study is 10-20 times larger than previous studies and contains data on children from North America, Europe, and Asia. It provides the most compelling evidence to date that CD is associated with widespread structural brain differences,” he added.
The findings were published online in The Lancet Psychiatry.
An Understudied Disorder
In the largest study of its kind, researchers at the Universities of Bath and Birmingham, both in England, collaborated with research teams across Europe, North America, and Asia, as part of the Enhancing NeuroImaging Genetics through Meta-Analysis–Antisocial Behavior Working Group to learn more about one of the “least researched psychiatric disorders,” they wrote.
The investigators used MRI to examine the brain structure of 1185 children with a clinical diagnosis of CD and 1253 typically developing children from 17-21 across 15 international study cohorts.
After adjusting for total intracranial volume investigators found that youth with CD (29% women; mean age, 13.7 years) had lower total surface area and lower regional surface area in 26 of the 34 cortical regions, spanning all four lobes of the brain, compared with their typically developing counterparts (35.6% women; mean age, 13.5 years).
Youth with CD also showed greater cortical thickness in the caudal anterior cingulate cortex (P = .0001) and lower cortical thickness in the banks of the superior temporal sulcus vs those without CD (P = .0010).
In addition, the CD group also had lower volume in the thalamus (P = .0009), amygdala (P = .0014), hippocampus (P = .0031), and nucleus accumbens (P = .0052).
Most findings remained significant after adjusting for intelligence quotient, psychiatric comorbidities, and psychotropic medication use. Of note, group difference in cortical thickness, 22 of 27 differences in surface area. In addition, three of four subcortical differences remained robust after adjusting for co-occurring attention-deficit/hyperactivity disorder, the most frequent comorbidity.
When the investigators divided individuals with CD into two subgroups — those with high vs low levels of callous-unemotional traits — they found limited overall differences. However, those with high callous-unemotional traits had lower surface area in the superior temporal and superior frontal gyri vs those with low callous-unemotional traits and the typically developing group.
Investigators also found that individuals with childhood-onset CD had greater cortical thickness in the caudal anterior cingulate cortex compared with those with adolescent-onset CD.
Study limitations include comparison of different cohorts with differing protocols that could affect the validity of the findings. In addition, subgroup samples were small and had lower statistical power.
“Our finding of robust brain alterations in conduct disorder — similar to those in more widely recognized and widely treated disorders such as ADHD — emphasize the need for a greater focus on conduct disorder in research, treatment, and public policy,” the authors noted.
Seven study authors reported conflicts of interest with various pharmaceutical companies and other organizations.
A version of this article first appeared on Medscape.com.
FROM THE LANCET PSYCHIATRY
Gut Biomarkers Accurately Flag Autism Spectrum Disorder
, new research shows.
The findings could form the basis for development of a noninvasive diagnostic test for ASD and also provide novel therapeutic targets, wrote investigators, led by Siew C. Ng, MBBS, PhD, with the Microbiota I-Center (MagIC), the Chinese University of Hong Kong.
Their study was published online in Nature Microbiology.
Beyond Bacteria
The gut microbiome has been shown to play a central role in modulating the gut-brain axis, potentially influencing the development of ASD.
However, most studies in ASD have focused on the bacterial component of the microbiome. Whether nonbacterial microorganisms (such as gut archaea, fungi, and viruses) or function of the gut microbiome are altered in ASD remains unclear.
To investigate, the researchers performed metagenomic sequencing on fecal samples from 1627 boys and girls aged 1-13 years with and without ASD from five cohorts in China.
After controlling for diet, medication, and comorbidity, they identified 14 archaea, 51 bacteria, 7 fungi, 18 viruses, 27 microbial genes, and 12 metabolic pathways that were altered in children with ASD.
Machine-learning models using single-kingdom panels (archaea, bacteria, fungi, viruses) achieved area under the curve (AUC) values ranging from 0.68 to 0.87 in differentiating children with ASD from neurotypical control children.
A model based on a panel of 31 multikingdom and functional markers achieved “high predictive value” for ASD, achieving an AUC of 0.91, with comparable performance among boys and girls.
“The reproducible performance of the models across ages, sexes, and cohorts highlights their potential as promising diagnostic tools for ASD,” the investigators wrote.
They also noted that the accuracy of the model was largely driven by the biosynthesis pathways of ubiquinol-7 and thiamine diphosphate, which were less abundant in children with ASD, and may serve as therapeutic targets.
‘Exciting’ Possibilities
“This study broadens our understanding by including fungi, archaea, and viruses, where previous studies have largely focused on the role of gut bacteria in autism,” Bhismadev Chakrabarti, PhD, research director of the Centre for Autism at the University of Reading, United Kingdom, said in a statement from the nonprofit UK Science Media Centre.
“The results are broadly in line with previous studies that show reduced microbial diversity in autistic individuals. It also examines one of the largest samples seen in a study like this, which further strengthens the results,” Dr. Chakrabarti added.
He said this research may provide “new ways of detecting autism, if microbial markers turn out to strengthen the ability of genetic and behavioral tests to detect autism. A future platform that can combine genetic, microbial, and simple behavioral assessments could help address the detection gap.
“One limitation of this data is that it cannot assess any causal role for the microbiota in the development of autism,” Dr. Chakrabarti noted.
This study was supported by InnoHK, the Government of Hong Kong, Special Administrative Region of the People’s Republic of China, The D. H. Chen Foundation, and the New Cornerstone Science Foundation through the New Cornerstone Investigator Program. Dr. Ng has served as an advisory board member for Pfizer, Ferring, Janssen, and AbbVie; has received honoraria as a speaker for Ferring, Tillotts, Menarini, Janssen, AbbVie, and Takeda; is a scientific cofounder and shareholder of GenieBiome; receives patent royalties through her affiliated institutions; and is named as a co-inventor of patent applications that cover the therapeutic and diagnostic use of microbiome. Dr. Chakrabarti has no relevant conflicts of interest.
A version of this article first appeared on Medscape.com.
, new research shows.
The findings could form the basis for development of a noninvasive diagnostic test for ASD and also provide novel therapeutic targets, wrote investigators, led by Siew C. Ng, MBBS, PhD, with the Microbiota I-Center (MagIC), the Chinese University of Hong Kong.
Their study was published online in Nature Microbiology.
Beyond Bacteria
The gut microbiome has been shown to play a central role in modulating the gut-brain axis, potentially influencing the development of ASD.
However, most studies in ASD have focused on the bacterial component of the microbiome. Whether nonbacterial microorganisms (such as gut archaea, fungi, and viruses) or function of the gut microbiome are altered in ASD remains unclear.
To investigate, the researchers performed metagenomic sequencing on fecal samples from 1627 boys and girls aged 1-13 years with and without ASD from five cohorts in China.
After controlling for diet, medication, and comorbidity, they identified 14 archaea, 51 bacteria, 7 fungi, 18 viruses, 27 microbial genes, and 12 metabolic pathways that were altered in children with ASD.
Machine-learning models using single-kingdom panels (archaea, bacteria, fungi, viruses) achieved area under the curve (AUC) values ranging from 0.68 to 0.87 in differentiating children with ASD from neurotypical control children.
A model based on a panel of 31 multikingdom and functional markers achieved “high predictive value” for ASD, achieving an AUC of 0.91, with comparable performance among boys and girls.
“The reproducible performance of the models across ages, sexes, and cohorts highlights their potential as promising diagnostic tools for ASD,” the investigators wrote.
They also noted that the accuracy of the model was largely driven by the biosynthesis pathways of ubiquinol-7 and thiamine diphosphate, which were less abundant in children with ASD, and may serve as therapeutic targets.
‘Exciting’ Possibilities
“This study broadens our understanding by including fungi, archaea, and viruses, where previous studies have largely focused on the role of gut bacteria in autism,” Bhismadev Chakrabarti, PhD, research director of the Centre for Autism at the University of Reading, United Kingdom, said in a statement from the nonprofit UK Science Media Centre.
“The results are broadly in line with previous studies that show reduced microbial diversity in autistic individuals. It also examines one of the largest samples seen in a study like this, which further strengthens the results,” Dr. Chakrabarti added.
He said this research may provide “new ways of detecting autism, if microbial markers turn out to strengthen the ability of genetic and behavioral tests to detect autism. A future platform that can combine genetic, microbial, and simple behavioral assessments could help address the detection gap.
“One limitation of this data is that it cannot assess any causal role for the microbiota in the development of autism,” Dr. Chakrabarti noted.
This study was supported by InnoHK, the Government of Hong Kong, Special Administrative Region of the People’s Republic of China, The D. H. Chen Foundation, and the New Cornerstone Science Foundation through the New Cornerstone Investigator Program. Dr. Ng has served as an advisory board member for Pfizer, Ferring, Janssen, and AbbVie; has received honoraria as a speaker for Ferring, Tillotts, Menarini, Janssen, AbbVie, and Takeda; is a scientific cofounder and shareholder of GenieBiome; receives patent royalties through her affiliated institutions; and is named as a co-inventor of patent applications that cover the therapeutic and diagnostic use of microbiome. Dr. Chakrabarti has no relevant conflicts of interest.
A version of this article first appeared on Medscape.com.
, new research shows.
The findings could form the basis for development of a noninvasive diagnostic test for ASD and also provide novel therapeutic targets, wrote investigators, led by Siew C. Ng, MBBS, PhD, with the Microbiota I-Center (MagIC), the Chinese University of Hong Kong.
Their study was published online in Nature Microbiology.
Beyond Bacteria
The gut microbiome has been shown to play a central role in modulating the gut-brain axis, potentially influencing the development of ASD.
However, most studies in ASD have focused on the bacterial component of the microbiome. Whether nonbacterial microorganisms (such as gut archaea, fungi, and viruses) or function of the gut microbiome are altered in ASD remains unclear.
To investigate, the researchers performed metagenomic sequencing on fecal samples from 1627 boys and girls aged 1-13 years with and without ASD from five cohorts in China.
After controlling for diet, medication, and comorbidity, they identified 14 archaea, 51 bacteria, 7 fungi, 18 viruses, 27 microbial genes, and 12 metabolic pathways that were altered in children with ASD.
Machine-learning models using single-kingdom panels (archaea, bacteria, fungi, viruses) achieved area under the curve (AUC) values ranging from 0.68 to 0.87 in differentiating children with ASD from neurotypical control children.
A model based on a panel of 31 multikingdom and functional markers achieved “high predictive value” for ASD, achieving an AUC of 0.91, with comparable performance among boys and girls.
“The reproducible performance of the models across ages, sexes, and cohorts highlights their potential as promising diagnostic tools for ASD,” the investigators wrote.
They also noted that the accuracy of the model was largely driven by the biosynthesis pathways of ubiquinol-7 and thiamine diphosphate, which were less abundant in children with ASD, and may serve as therapeutic targets.
‘Exciting’ Possibilities
“This study broadens our understanding by including fungi, archaea, and viruses, where previous studies have largely focused on the role of gut bacteria in autism,” Bhismadev Chakrabarti, PhD, research director of the Centre for Autism at the University of Reading, United Kingdom, said in a statement from the nonprofit UK Science Media Centre.
“The results are broadly in line with previous studies that show reduced microbial diversity in autistic individuals. It also examines one of the largest samples seen in a study like this, which further strengthens the results,” Dr. Chakrabarti added.
He said this research may provide “new ways of detecting autism, if microbial markers turn out to strengthen the ability of genetic and behavioral tests to detect autism. A future platform that can combine genetic, microbial, and simple behavioral assessments could help address the detection gap.
“One limitation of this data is that it cannot assess any causal role for the microbiota in the development of autism,” Dr. Chakrabarti noted.
This study was supported by InnoHK, the Government of Hong Kong, Special Administrative Region of the People’s Republic of China, The D. H. Chen Foundation, and the New Cornerstone Science Foundation through the New Cornerstone Investigator Program. Dr. Ng has served as an advisory board member for Pfizer, Ferring, Janssen, and AbbVie; has received honoraria as a speaker for Ferring, Tillotts, Menarini, Janssen, AbbVie, and Takeda; is a scientific cofounder and shareholder of GenieBiome; receives patent royalties through her affiliated institutions; and is named as a co-inventor of patent applications that cover the therapeutic and diagnostic use of microbiome. Dr. Chakrabarti has no relevant conflicts of interest.
A version of this article first appeared on Medscape.com.
FROM NATURE MICROBIOLOGY
Genetic Test Combo May Help Identify Global Development Delay
, a new study suggests.
Researchers, led by Jiamei Zhang, MS, Department of Rehabilitation Medicine, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China, in a multicenter, prospective cohort study enrolled patients ages 12 to 60 months with GDD from six centers in China from July 2020 through August 2023. Participants underwent trio whole exome sequencing (trio-WES) paired with copy number variation sequencing (CNV-seq).
“To the best of our knowledge, this study represents the largest prospective examination of combined genetic testing methods in a GDD cohort,” the authors reported in JAMA Network Open.
GDD is a common neurodevelopmental disorder, marked by cognitive impairment, and affects about 1% of children, the paper states. Most children with GDD develop intellectual disability (ID) after 5 years of age, with implications for quality of life, their physical abilities, and social functioning. Early and accurate diagnosis followed by appropriately targeted treatment is critical, but lacking. Researchers note that there is lack of consensus among health care professionals on whether genetic testing is necessary.
Genetics are known to play a significant role in pathogenesis of GDD, but definitive biomarkers have been elusive.
Positive Detection Rate of 61%
In this study, the combined use of trio-WES with CNV-seq in children with early-stage GDD resulted in a positive detection rate of 61%, a significant improvement over performing individual tests, “enhancing the positive detection rate by 18%-40%,” the researchers wrote. The combined approach also saves families time and costs, they note, while leading to more comprehensive genetic analysis and fewer missed diagnoses.
The combined approach also addressed the limitations of trio-WES and CNV-seq used alone, the authors wrote. Because of technological constraints, trio-WES may miss 55% of CNV variations, and CNV-seq has a missed diagnosis rate of 3%.
The study included 434 patients with GDD (60% male; average age, 25 months) with diverse degrees of cognitive impairment: mild (23%); moderate (32%); severe (28%); and profound (17%).
Three characteristics were linked with higher likelihood of having genetic variants: Craniofacial abnormalities (odds ratio [OR], 2.27; 95% confidence interval [CI], 1.45-3.56); moderate or severe cognitive impairment (OR, 1.69; 95% CI, 1.05-2.70); and age between 12 and 24 months (OR, 1.57; 95% CI, 1.05-2.35).
Dopaminergic Pathway Promising for Treatment
Researchers also discovered that GDD-related genes were primarily enriched in lysosome, dopaminergic synapse, and lysine degradation pathways. Dopaminergic synapse emerged as a significant pathway linked with GDD.
“In this cohort study, our findings support the correlation between dopaminergic synapse and cognitive impairment, as substantiated by prior research and animal models. Therefore, targeting the dopaminergic pathway holds promise for treating GDD and ID,” the authors wrote.
However, the authors note in the limitations that they used only a subset of 100 patients with GDD to measure dopamine concentration.
“Expanding the sample size and conducting in vivo and in vitro experiments are necessary steps to verify whether dopamine can be targeted for clinical precision medical intervention in patients with GDD,” they wrote.
The authors reported no relevant financial relationships.
, a new study suggests.
Researchers, led by Jiamei Zhang, MS, Department of Rehabilitation Medicine, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China, in a multicenter, prospective cohort study enrolled patients ages 12 to 60 months with GDD from six centers in China from July 2020 through August 2023. Participants underwent trio whole exome sequencing (trio-WES) paired with copy number variation sequencing (CNV-seq).
“To the best of our knowledge, this study represents the largest prospective examination of combined genetic testing methods in a GDD cohort,” the authors reported in JAMA Network Open.
GDD is a common neurodevelopmental disorder, marked by cognitive impairment, and affects about 1% of children, the paper states. Most children with GDD develop intellectual disability (ID) after 5 years of age, with implications for quality of life, their physical abilities, and social functioning. Early and accurate diagnosis followed by appropriately targeted treatment is critical, but lacking. Researchers note that there is lack of consensus among health care professionals on whether genetic testing is necessary.
Genetics are known to play a significant role in pathogenesis of GDD, but definitive biomarkers have been elusive.
Positive Detection Rate of 61%
In this study, the combined use of trio-WES with CNV-seq in children with early-stage GDD resulted in a positive detection rate of 61%, a significant improvement over performing individual tests, “enhancing the positive detection rate by 18%-40%,” the researchers wrote. The combined approach also saves families time and costs, they note, while leading to more comprehensive genetic analysis and fewer missed diagnoses.
The combined approach also addressed the limitations of trio-WES and CNV-seq used alone, the authors wrote. Because of technological constraints, trio-WES may miss 55% of CNV variations, and CNV-seq has a missed diagnosis rate of 3%.
The study included 434 patients with GDD (60% male; average age, 25 months) with diverse degrees of cognitive impairment: mild (23%); moderate (32%); severe (28%); and profound (17%).
Three characteristics were linked with higher likelihood of having genetic variants: Craniofacial abnormalities (odds ratio [OR], 2.27; 95% confidence interval [CI], 1.45-3.56); moderate or severe cognitive impairment (OR, 1.69; 95% CI, 1.05-2.70); and age between 12 and 24 months (OR, 1.57; 95% CI, 1.05-2.35).
Dopaminergic Pathway Promising for Treatment
Researchers also discovered that GDD-related genes were primarily enriched in lysosome, dopaminergic synapse, and lysine degradation pathways. Dopaminergic synapse emerged as a significant pathway linked with GDD.
“In this cohort study, our findings support the correlation between dopaminergic synapse and cognitive impairment, as substantiated by prior research and animal models. Therefore, targeting the dopaminergic pathway holds promise for treating GDD and ID,” the authors wrote.
However, the authors note in the limitations that they used only a subset of 100 patients with GDD to measure dopamine concentration.
“Expanding the sample size and conducting in vivo and in vitro experiments are necessary steps to verify whether dopamine can be targeted for clinical precision medical intervention in patients with GDD,” they wrote.
The authors reported no relevant financial relationships.
, a new study suggests.
Researchers, led by Jiamei Zhang, MS, Department of Rehabilitation Medicine, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China, in a multicenter, prospective cohort study enrolled patients ages 12 to 60 months with GDD from six centers in China from July 2020 through August 2023. Participants underwent trio whole exome sequencing (trio-WES) paired with copy number variation sequencing (CNV-seq).
“To the best of our knowledge, this study represents the largest prospective examination of combined genetic testing methods in a GDD cohort,” the authors reported in JAMA Network Open.
GDD is a common neurodevelopmental disorder, marked by cognitive impairment, and affects about 1% of children, the paper states. Most children with GDD develop intellectual disability (ID) after 5 years of age, with implications for quality of life, their physical abilities, and social functioning. Early and accurate diagnosis followed by appropriately targeted treatment is critical, but lacking. Researchers note that there is lack of consensus among health care professionals on whether genetic testing is necessary.
Genetics are known to play a significant role in pathogenesis of GDD, but definitive biomarkers have been elusive.
Positive Detection Rate of 61%
In this study, the combined use of trio-WES with CNV-seq in children with early-stage GDD resulted in a positive detection rate of 61%, a significant improvement over performing individual tests, “enhancing the positive detection rate by 18%-40%,” the researchers wrote. The combined approach also saves families time and costs, they note, while leading to more comprehensive genetic analysis and fewer missed diagnoses.
The combined approach also addressed the limitations of trio-WES and CNV-seq used alone, the authors wrote. Because of technological constraints, trio-WES may miss 55% of CNV variations, and CNV-seq has a missed diagnosis rate of 3%.
The study included 434 patients with GDD (60% male; average age, 25 months) with diverse degrees of cognitive impairment: mild (23%); moderate (32%); severe (28%); and profound (17%).
Three characteristics were linked with higher likelihood of having genetic variants: Craniofacial abnormalities (odds ratio [OR], 2.27; 95% confidence interval [CI], 1.45-3.56); moderate or severe cognitive impairment (OR, 1.69; 95% CI, 1.05-2.70); and age between 12 and 24 months (OR, 1.57; 95% CI, 1.05-2.35).
Dopaminergic Pathway Promising for Treatment
Researchers also discovered that GDD-related genes were primarily enriched in lysosome, dopaminergic synapse, and lysine degradation pathways. Dopaminergic synapse emerged as a significant pathway linked with GDD.
“In this cohort study, our findings support the correlation between dopaminergic synapse and cognitive impairment, as substantiated by prior research and animal models. Therefore, targeting the dopaminergic pathway holds promise for treating GDD and ID,” the authors wrote.
However, the authors note in the limitations that they used only a subset of 100 patients with GDD to measure dopamine concentration.
“Expanding the sample size and conducting in vivo and in vitro experiments are necessary steps to verify whether dopamine can be targeted for clinical precision medical intervention in patients with GDD,” they wrote.
The authors reported no relevant financial relationships.
FROM JAMA NETWORK OPEN
PCPs May Have a New Tool to Help Identify Autism in Young Children
Incorporating eye-tracking biomarkers into pediatric autism assessments may make identifying the condition easier, according to new findings published in JAMA Network Open.
Researchers created an artificial intelligence–based tool to help primary care clinicians and pediatricians spot potential cases of the neurological condition, according to Brandon Keehn, PhD, associate professor in the Department of Speech, Language, and Hearing Sciences at Purdue University in West Lafayette, Indiana, and an author of the study.
Most primary care clinicians do not receive specialized training in identifying autism, and around a third diagnose the condition with uncertainty, according to Dr. Keehn. The tool helps clinicians by incorporating their diagnosis and self-reported level of certainty with eye-tracking biomarkers. A clinical psychologist also assessed children, either verifying or confuting the earlier results.
The tool produced the same diagnosis as that from a psychologist in 90% of cases. When children were assessed using eye biomarkers alone, the diagnosis was aligned with that of a psychologist 77% of the time.
“This is the first step in demonstrating both that eye-tracking biomarkers are sensitive to autism and whether or not these biomarkers provide extra clinical information for primary care physicians to more accurately diagnose autism,” Dr. Keehn told this news organization.
The study took place between 2019 and 2022 and included 146 children between 14 and 48 months old who were treated at seven primary care practices in Indiana. Dr. Keehn and colleagues asked primary care clinicians to rate their level of certainty in their diagnosis.
During the biomarker test, toddlers watched cartoons while researchers tracked their eye movements. Six biomarkers included in the test were based on previous research linking eye movements to autism, according to Dr. Keehn.
These included whether toddlers looked more at images of people or geometric patterns and the speed and size of pupil dilation when exposed to bright light.
Most toddlers produced a positive result for autism in only one biomarker test. Dr. Keehn said this confirms that children should be tested for a variety of biomarkers because each patient’s condition manifests differently.
Dr. Keehn said his team is still a few steps away from determining how the model would work in a real clinical setting and that they are planning more research with a larger study population.
Alice Kuo, MD, a pediatrician specializing in autism at the University of California, Los Angeles (UCLA), said primary care clinicians should feel comfortable making an autism diagnosis.
“Any tool that helps them to do that can be useful, since wait times for a specialist can take years,” Dr. Kuo, also the director of the Autism Intervention Research Network on Physical Health at UCLA, said.
However, Dr. Kuo said she is concerned about the cases that were falsely identified as positive or negative.
“To be told your kid is autistic when he’s not, or to be told your kid is not when he clinically is, has huge ramifications,” she said.
The study was funded by the National Institute of Mental Health, the Riley Children’s Foundation, and the Indiana Clinical and Translational Sciences Institute. Dr. Keehn reported payments for workshops on the use of the Autism Diagnostic Observation Schedule.
A version of this article appeared on Medscape.com .
Incorporating eye-tracking biomarkers into pediatric autism assessments may make identifying the condition easier, according to new findings published in JAMA Network Open.
Researchers created an artificial intelligence–based tool to help primary care clinicians and pediatricians spot potential cases of the neurological condition, according to Brandon Keehn, PhD, associate professor in the Department of Speech, Language, and Hearing Sciences at Purdue University in West Lafayette, Indiana, and an author of the study.
Most primary care clinicians do not receive specialized training in identifying autism, and around a third diagnose the condition with uncertainty, according to Dr. Keehn. The tool helps clinicians by incorporating their diagnosis and self-reported level of certainty with eye-tracking biomarkers. A clinical psychologist also assessed children, either verifying or confuting the earlier results.
The tool produced the same diagnosis as that from a psychologist in 90% of cases. When children were assessed using eye biomarkers alone, the diagnosis was aligned with that of a psychologist 77% of the time.
“This is the first step in demonstrating both that eye-tracking biomarkers are sensitive to autism and whether or not these biomarkers provide extra clinical information for primary care physicians to more accurately diagnose autism,” Dr. Keehn told this news organization.
The study took place between 2019 and 2022 and included 146 children between 14 and 48 months old who were treated at seven primary care practices in Indiana. Dr. Keehn and colleagues asked primary care clinicians to rate their level of certainty in their diagnosis.
During the biomarker test, toddlers watched cartoons while researchers tracked their eye movements. Six biomarkers included in the test were based on previous research linking eye movements to autism, according to Dr. Keehn.
These included whether toddlers looked more at images of people or geometric patterns and the speed and size of pupil dilation when exposed to bright light.
Most toddlers produced a positive result for autism in only one biomarker test. Dr. Keehn said this confirms that children should be tested for a variety of biomarkers because each patient’s condition manifests differently.
Dr. Keehn said his team is still a few steps away from determining how the model would work in a real clinical setting and that they are planning more research with a larger study population.
Alice Kuo, MD, a pediatrician specializing in autism at the University of California, Los Angeles (UCLA), said primary care clinicians should feel comfortable making an autism diagnosis.
“Any tool that helps them to do that can be useful, since wait times for a specialist can take years,” Dr. Kuo, also the director of the Autism Intervention Research Network on Physical Health at UCLA, said.
However, Dr. Kuo said she is concerned about the cases that were falsely identified as positive or negative.
“To be told your kid is autistic when he’s not, or to be told your kid is not when he clinically is, has huge ramifications,” she said.
The study was funded by the National Institute of Mental Health, the Riley Children’s Foundation, and the Indiana Clinical and Translational Sciences Institute. Dr. Keehn reported payments for workshops on the use of the Autism Diagnostic Observation Schedule.
A version of this article appeared on Medscape.com .
Incorporating eye-tracking biomarkers into pediatric autism assessments may make identifying the condition easier, according to new findings published in JAMA Network Open.
Researchers created an artificial intelligence–based tool to help primary care clinicians and pediatricians spot potential cases of the neurological condition, according to Brandon Keehn, PhD, associate professor in the Department of Speech, Language, and Hearing Sciences at Purdue University in West Lafayette, Indiana, and an author of the study.
Most primary care clinicians do not receive specialized training in identifying autism, and around a third diagnose the condition with uncertainty, according to Dr. Keehn. The tool helps clinicians by incorporating their diagnosis and self-reported level of certainty with eye-tracking biomarkers. A clinical psychologist also assessed children, either verifying or confuting the earlier results.
The tool produced the same diagnosis as that from a psychologist in 90% of cases. When children were assessed using eye biomarkers alone, the diagnosis was aligned with that of a psychologist 77% of the time.
“This is the first step in demonstrating both that eye-tracking biomarkers are sensitive to autism and whether or not these biomarkers provide extra clinical information for primary care physicians to more accurately diagnose autism,” Dr. Keehn told this news organization.
The study took place between 2019 and 2022 and included 146 children between 14 and 48 months old who were treated at seven primary care practices in Indiana. Dr. Keehn and colleagues asked primary care clinicians to rate their level of certainty in their diagnosis.
During the biomarker test, toddlers watched cartoons while researchers tracked their eye movements. Six biomarkers included in the test were based on previous research linking eye movements to autism, according to Dr. Keehn.
These included whether toddlers looked more at images of people or geometric patterns and the speed and size of pupil dilation when exposed to bright light.
Most toddlers produced a positive result for autism in only one biomarker test. Dr. Keehn said this confirms that children should be tested for a variety of biomarkers because each patient’s condition manifests differently.
Dr. Keehn said his team is still a few steps away from determining how the model would work in a real clinical setting and that they are planning more research with a larger study population.
Alice Kuo, MD, a pediatrician specializing in autism at the University of California, Los Angeles (UCLA), said primary care clinicians should feel comfortable making an autism diagnosis.
“Any tool that helps them to do that can be useful, since wait times for a specialist can take years,” Dr. Kuo, also the director of the Autism Intervention Research Network on Physical Health at UCLA, said.
However, Dr. Kuo said she is concerned about the cases that were falsely identified as positive or negative.
“To be told your kid is autistic when he’s not, or to be told your kid is not when he clinically is, has huge ramifications,” she said.
The study was funded by the National Institute of Mental Health, the Riley Children’s Foundation, and the Indiana Clinical and Translational Sciences Institute. Dr. Keehn reported payments for workshops on the use of the Autism Diagnostic Observation Schedule.
A version of this article appeared on Medscape.com .
FROM JAMA NETWORK OPEN
First Consensus Statement on Improving Healthcare for Children with Neurodevelopmental Disabilities
The statement was published in Pediatrics.
The disparities in healthcare culture, mindset, and practice often start in childhood for young people with conditions including autism spectrum disorder (ASD), intellectual disability, and attention-deficit/hyperactivity disorder (ADHD), wrote co–first authors Carol Weitzman, MD, co-director of the Autism Spectrum Center at Boston Children’s Hospital, Boston, Massachusetts, and Cy Nadler, PhD, section chief of Autism Psychology at Children’s Mercy in Kansas City, Missouri, and colleagues.
Without better access to safe and appropriate care, people with NDDs experience more seclusion, accidents, restraints, and injury in healthcare encounters, the researchers wrote.
‘Accessible, Humane, Effective Care’
“At the heart of this consensus statement is an affirmation that all people are entitled to healthcare that is accessible, humane, and effective,” they wrote.
The consensus statement was developed as part of the Supporting Access for Everyone (SAFE) Initiative, launched by the Developmental Behavioral Pediatric Research Network and the Association of University Centers on Disability. The consensus panel comprised professionals, caregivers, and adults with NDDs. After a 2-day public forum, the consensus panel held a conference and developed a statement on SAFE care, an NDD Health Care Bill of Rights and Transition Considerations. They developed 10 statements across five domains: training; communication; access and planning; diversity, equity, inclusion, belonging, and anti-ableism; and policy and structural change.
Asking the Patient ‘What do You Need?’
One theme in the statement that may have the most impact is “the importance of asking the person in front of you what they need,” and building a care plan around that, said senior author Marilyn Augustyn, MD, Director of the Division of Developmental and Behavioral Pediatrics at Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts. “The medical community hasn’t done that very well for individuals with neurodevelopmental disabilities.”
Dr. Weitzman added: “Traditionally in healthcare settings, we’ve asked people to check their disabilities at the door.” Many people with neurodevelopmental disabilities often have “invisible disabilities,” she said, explaining that patients may have accommodation needs that aren’t immediately obvious, but could improve their access to care, so asking them what they need is critical.
Examples of ‘Ableism’
The consensus statement also calls attention to structural “ableism” or policies or practices that favor able-bodied people over those with disabilities and details the need for more training and changed policies.
The paper gives some examples of ableism, such as inappropriately excluding people with NDDs from research; staff assuming nonspeaking patients have no capacity for communication; or lack of awareness of sensory needs before using cold stethoscopes or flashing direct light into eyes.
Dr. Weitzman says this work is just the beginning of a complex process. It is intended to be the driver for developing curriculum to train all clinicians and others working with patients about neurodevelopmental disabilities. The hope is it will lead to more research to formalize best practices and make policies mandatory rather than optional.
The urgency in highlighting these issues is partly related to the prevalence of children and adolescents with neurodevelopmental disabilities, which the paper states is approximately 1 in 6.
But there are personal reasons as well for the team who developed the statement.
“We just believe that it is just a human right,” Dr. Weitzman said. “Having a neurodevelopmental disability does not make you any less entitled to good care. “
Dr. Augustyn added, “The children I’ve had the honor of caring for for the last 30 years deserve all this care and more. I think it’s time.”
This work was supported by the Developmental Behavioral Pediatric Research Network and the Association of University Centers on Disability. Dr. Weitzman is a past consultant for Helios/Meliora. The other authors report no relevant financial relationships.
The statement was published in Pediatrics.
The disparities in healthcare culture, mindset, and practice often start in childhood for young people with conditions including autism spectrum disorder (ASD), intellectual disability, and attention-deficit/hyperactivity disorder (ADHD), wrote co–first authors Carol Weitzman, MD, co-director of the Autism Spectrum Center at Boston Children’s Hospital, Boston, Massachusetts, and Cy Nadler, PhD, section chief of Autism Psychology at Children’s Mercy in Kansas City, Missouri, and colleagues.
Without better access to safe and appropriate care, people with NDDs experience more seclusion, accidents, restraints, and injury in healthcare encounters, the researchers wrote.
‘Accessible, Humane, Effective Care’
“At the heart of this consensus statement is an affirmation that all people are entitled to healthcare that is accessible, humane, and effective,” they wrote.
The consensus statement was developed as part of the Supporting Access for Everyone (SAFE) Initiative, launched by the Developmental Behavioral Pediatric Research Network and the Association of University Centers on Disability. The consensus panel comprised professionals, caregivers, and adults with NDDs. After a 2-day public forum, the consensus panel held a conference and developed a statement on SAFE care, an NDD Health Care Bill of Rights and Transition Considerations. They developed 10 statements across five domains: training; communication; access and planning; diversity, equity, inclusion, belonging, and anti-ableism; and policy and structural change.
Asking the Patient ‘What do You Need?’
One theme in the statement that may have the most impact is “the importance of asking the person in front of you what they need,” and building a care plan around that, said senior author Marilyn Augustyn, MD, Director of the Division of Developmental and Behavioral Pediatrics at Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts. “The medical community hasn’t done that very well for individuals with neurodevelopmental disabilities.”
Dr. Weitzman added: “Traditionally in healthcare settings, we’ve asked people to check their disabilities at the door.” Many people with neurodevelopmental disabilities often have “invisible disabilities,” she said, explaining that patients may have accommodation needs that aren’t immediately obvious, but could improve their access to care, so asking them what they need is critical.
Examples of ‘Ableism’
The consensus statement also calls attention to structural “ableism” or policies or practices that favor able-bodied people over those with disabilities and details the need for more training and changed policies.
The paper gives some examples of ableism, such as inappropriately excluding people with NDDs from research; staff assuming nonspeaking patients have no capacity for communication; or lack of awareness of sensory needs before using cold stethoscopes or flashing direct light into eyes.
Dr. Weitzman says this work is just the beginning of a complex process. It is intended to be the driver for developing curriculum to train all clinicians and others working with patients about neurodevelopmental disabilities. The hope is it will lead to more research to formalize best practices and make policies mandatory rather than optional.
The urgency in highlighting these issues is partly related to the prevalence of children and adolescents with neurodevelopmental disabilities, which the paper states is approximately 1 in 6.
But there are personal reasons as well for the team who developed the statement.
“We just believe that it is just a human right,” Dr. Weitzman said. “Having a neurodevelopmental disability does not make you any less entitled to good care. “
Dr. Augustyn added, “The children I’ve had the honor of caring for for the last 30 years deserve all this care and more. I think it’s time.”
This work was supported by the Developmental Behavioral Pediatric Research Network and the Association of University Centers on Disability. Dr. Weitzman is a past consultant for Helios/Meliora. The other authors report no relevant financial relationships.
The statement was published in Pediatrics.
The disparities in healthcare culture, mindset, and practice often start in childhood for young people with conditions including autism spectrum disorder (ASD), intellectual disability, and attention-deficit/hyperactivity disorder (ADHD), wrote co–first authors Carol Weitzman, MD, co-director of the Autism Spectrum Center at Boston Children’s Hospital, Boston, Massachusetts, and Cy Nadler, PhD, section chief of Autism Psychology at Children’s Mercy in Kansas City, Missouri, and colleagues.
Without better access to safe and appropriate care, people with NDDs experience more seclusion, accidents, restraints, and injury in healthcare encounters, the researchers wrote.
‘Accessible, Humane, Effective Care’
“At the heart of this consensus statement is an affirmation that all people are entitled to healthcare that is accessible, humane, and effective,” they wrote.
The consensus statement was developed as part of the Supporting Access for Everyone (SAFE) Initiative, launched by the Developmental Behavioral Pediatric Research Network and the Association of University Centers on Disability. The consensus panel comprised professionals, caregivers, and adults with NDDs. After a 2-day public forum, the consensus panel held a conference and developed a statement on SAFE care, an NDD Health Care Bill of Rights and Transition Considerations. They developed 10 statements across five domains: training; communication; access and planning; diversity, equity, inclusion, belonging, and anti-ableism; and policy and structural change.
Asking the Patient ‘What do You Need?’
One theme in the statement that may have the most impact is “the importance of asking the person in front of you what they need,” and building a care plan around that, said senior author Marilyn Augustyn, MD, Director of the Division of Developmental and Behavioral Pediatrics at Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts. “The medical community hasn’t done that very well for individuals with neurodevelopmental disabilities.”
Dr. Weitzman added: “Traditionally in healthcare settings, we’ve asked people to check their disabilities at the door.” Many people with neurodevelopmental disabilities often have “invisible disabilities,” she said, explaining that patients may have accommodation needs that aren’t immediately obvious, but could improve their access to care, so asking them what they need is critical.
Examples of ‘Ableism’
The consensus statement also calls attention to structural “ableism” or policies or practices that favor able-bodied people over those with disabilities and details the need for more training and changed policies.
The paper gives some examples of ableism, such as inappropriately excluding people with NDDs from research; staff assuming nonspeaking patients have no capacity for communication; or lack of awareness of sensory needs before using cold stethoscopes or flashing direct light into eyes.
Dr. Weitzman says this work is just the beginning of a complex process. It is intended to be the driver for developing curriculum to train all clinicians and others working with patients about neurodevelopmental disabilities. The hope is it will lead to more research to formalize best practices and make policies mandatory rather than optional.
The urgency in highlighting these issues is partly related to the prevalence of children and adolescents with neurodevelopmental disabilities, which the paper states is approximately 1 in 6.
But there are personal reasons as well for the team who developed the statement.
“We just believe that it is just a human right,” Dr. Weitzman said. “Having a neurodevelopmental disability does not make you any less entitled to good care. “
Dr. Augustyn added, “The children I’ve had the honor of caring for for the last 30 years deserve all this care and more. I think it’s time.”
This work was supported by the Developmental Behavioral Pediatric Research Network and the Association of University Centers on Disability. Dr. Weitzman is a past consultant for Helios/Meliora. The other authors report no relevant financial relationships.
Positive Results for Intranasal Oxytocin in Adults With Autism
BUDAPEST, HUNGARY — Twice daily intranasal oxytocin has been associated with improved social functioning, quality of life, and overall symptoms in adults with autism spectrum disorder (ASD), results of a small randomized control trial showed.
“One of the challenges for adults with autism is experiencing poor social interactions and difficulties in making friends. Insufficient social support from peers, friends, and family members can contribute to loneliness in adolescents with ASD, which in turn leads to anxiety, sadness, and social isolation,” said study investigator Saba Faraji Niri, MD, assistant professor of psychiatry, Tehran University of Medical Sciences in Iran.
Recent US data show it is relatively common. In addition, previous research suggests intranasal oxytocin significantly increases activity in brain regions that play a role in establishing social interactions.
To evaluate the therapeutic effects and safety of intranasal oxytocin the researchers randomly assigned 39 adult patients with ASD to receive intranasal oxytocin or placebo with 24 units administered every 12 hours for 8 weeks.
Dr. Faraji Niri said study participants were required to stop all psychotropic medications for at least 8 weeks prior to study entry.
Participants were assessed at baseline and weeks 4 and 8 using the Autism Quotient, Ritvo Autism Asperger Diagnostic Scale — Revised (RAADS-R), Social Responsiveness Scale (SRS), Clinical Global Impression (CGI) scale, and the World Health Organization Quality of Life-BREF (WHOQL-BREF) questionnaire. Adverse events were also evaluated.
Dr. Faraji Niri said that those receiving intranasal oxytocin showed clinical improvement on RAADS-R scores (P = .010), as well as on the social communication subscale of the SRS (P = .002), the CGI scale (P = .000), and the physical (P = .004), psychological (P = .006), and social relationships (P = .046) domains of the WHOQL-BREF.
However, although the findings were positive, she said at this point it’s not possible to draw any definitive conclusions. She noted the study had several potential confounders. These included differences in baseline levels of endogenous oxytocin among study participants individuals, as well as difference in required treatment doses, which were adjusted by age and sex. The presence of comorbidities and interactions with other treatments could also affect the results.
Commenting on the findings for this news organization, session chair Szabolcs Kéri, PhD, Professor, Sztárai Institute, University of Tokaj, Sárospatak, Hungary, said the use of oxytocin for ASD is controversial. He said that, while the research contributes to the scientific debate, the clinical significance of the findings is unclear.
The investigators and Dr Keri reported no relevant financial disclosures.
A version of this article appeared on Medscape.com .
BUDAPEST, HUNGARY — Twice daily intranasal oxytocin has been associated with improved social functioning, quality of life, and overall symptoms in adults with autism spectrum disorder (ASD), results of a small randomized control trial showed.
“One of the challenges for adults with autism is experiencing poor social interactions and difficulties in making friends. Insufficient social support from peers, friends, and family members can contribute to loneliness in adolescents with ASD, which in turn leads to anxiety, sadness, and social isolation,” said study investigator Saba Faraji Niri, MD, assistant professor of psychiatry, Tehran University of Medical Sciences in Iran.
Recent US data show it is relatively common. In addition, previous research suggests intranasal oxytocin significantly increases activity in brain regions that play a role in establishing social interactions.
To evaluate the therapeutic effects and safety of intranasal oxytocin the researchers randomly assigned 39 adult patients with ASD to receive intranasal oxytocin or placebo with 24 units administered every 12 hours for 8 weeks.
Dr. Faraji Niri said study participants were required to stop all psychotropic medications for at least 8 weeks prior to study entry.
Participants were assessed at baseline and weeks 4 and 8 using the Autism Quotient, Ritvo Autism Asperger Diagnostic Scale — Revised (RAADS-R), Social Responsiveness Scale (SRS), Clinical Global Impression (CGI) scale, and the World Health Organization Quality of Life-BREF (WHOQL-BREF) questionnaire. Adverse events were also evaluated.
Dr. Faraji Niri said that those receiving intranasal oxytocin showed clinical improvement on RAADS-R scores (P = .010), as well as on the social communication subscale of the SRS (P = .002), the CGI scale (P = .000), and the physical (P = .004), psychological (P = .006), and social relationships (P = .046) domains of the WHOQL-BREF.
However, although the findings were positive, she said at this point it’s not possible to draw any definitive conclusions. She noted the study had several potential confounders. These included differences in baseline levels of endogenous oxytocin among study participants individuals, as well as difference in required treatment doses, which were adjusted by age and sex. The presence of comorbidities and interactions with other treatments could also affect the results.
Commenting on the findings for this news organization, session chair Szabolcs Kéri, PhD, Professor, Sztárai Institute, University of Tokaj, Sárospatak, Hungary, said the use of oxytocin for ASD is controversial. He said that, while the research contributes to the scientific debate, the clinical significance of the findings is unclear.
The investigators and Dr Keri reported no relevant financial disclosures.
A version of this article appeared on Medscape.com .
BUDAPEST, HUNGARY — Twice daily intranasal oxytocin has been associated with improved social functioning, quality of life, and overall symptoms in adults with autism spectrum disorder (ASD), results of a small randomized control trial showed.
“One of the challenges for adults with autism is experiencing poor social interactions and difficulties in making friends. Insufficient social support from peers, friends, and family members can contribute to loneliness in adolescents with ASD, which in turn leads to anxiety, sadness, and social isolation,” said study investigator Saba Faraji Niri, MD, assistant professor of psychiatry, Tehran University of Medical Sciences in Iran.
Recent US data show it is relatively common. In addition, previous research suggests intranasal oxytocin significantly increases activity in brain regions that play a role in establishing social interactions.
To evaluate the therapeutic effects and safety of intranasal oxytocin the researchers randomly assigned 39 adult patients with ASD to receive intranasal oxytocin or placebo with 24 units administered every 12 hours for 8 weeks.
Dr. Faraji Niri said study participants were required to stop all psychotropic medications for at least 8 weeks prior to study entry.
Participants were assessed at baseline and weeks 4 and 8 using the Autism Quotient, Ritvo Autism Asperger Diagnostic Scale — Revised (RAADS-R), Social Responsiveness Scale (SRS), Clinical Global Impression (CGI) scale, and the World Health Organization Quality of Life-BREF (WHOQL-BREF) questionnaire. Adverse events were also evaluated.
Dr. Faraji Niri said that those receiving intranasal oxytocin showed clinical improvement on RAADS-R scores (P = .010), as well as on the social communication subscale of the SRS (P = .002), the CGI scale (P = .000), and the physical (P = .004), psychological (P = .006), and social relationships (P = .046) domains of the WHOQL-BREF.
However, although the findings were positive, she said at this point it’s not possible to draw any definitive conclusions. She noted the study had several potential confounders. These included differences in baseline levels of endogenous oxytocin among study participants individuals, as well as difference in required treatment doses, which were adjusted by age and sex. The presence of comorbidities and interactions with other treatments could also affect the results.
Commenting on the findings for this news organization, session chair Szabolcs Kéri, PhD, Professor, Sztárai Institute, University of Tokaj, Sárospatak, Hungary, said the use of oxytocin for ASD is controversial. He said that, while the research contributes to the scientific debate, the clinical significance of the findings is unclear.
The investigators and Dr Keri reported no relevant financial disclosures.
A version of this article appeared on Medscape.com .
First US Adult ADHD Guidelines Finally on the Way?
The first US clinical guidelines to diagnose and treat attention-deficit/hyperactivity disorder (ADHD) in adults are expected to be released this fall, providing patients, clinicians, insurers, and policymakers with a long overdue and much-needed standardized framework.
The initiative comes under the auspices of the American Professional Society of ADHD and Related Disorders (APSARD). David Goodman, MD, a member of the APSARD guidelines executive committee and assistant professor in the Department of Psychiatry and Behavioral Sciences at Johns Hopkins School of Medicine in Baltimore, Maryland, noted that the US lags behind several other nations, including Canada, the United Kingdom, Australia, and New Zealand who already have guidelines in place.
Dr. Goodman would not go into any detail as to why the country has been so slow off the mark but told this news organization that in part it has been due to a lack of specific funding. In addition, he said, “adult psychiatry abdicated responsibility for ADHD in adults.”
The American Psychiatric Association (APA) would not comment, although a spokesperson said two of its members are working with APSARD on the guidelines.
Estimates show that there are 10-11 million American adults (4.4%) with ADHD, making it the second most common psychiatric disorder in adults.
Surveys show that mental health professionals, including psychiatrists, report a lack of familiarity with ADHD in adults, said Margaret Sibley, PhD, professor of psychiatry and behavioral sciences at the University of Washington School of Medicine in Seattle and chair of the APSARD guidelines diagnostic and screening committee.
Many don’t consider an ADHD diagnosis in adults “because they were always trained to conceptualize it as something that’s relevant only in childhood,” Dr. Sibley told this new organization. However, research shows that people with ADHD do not outgrow the disorder.
“ADHD itself is still present and has unique problems associated with it in adults,” Dr. Sibley said.
Filling the Leadership Gap
Laurie Kulikosky, CEO of the advocacy group CHADD, said that the organization views the development of guidelines “as a huge step forward in the ability for more people to understand ADHD, particularly on the adult side.”
Oren Mason, MD, a primary care physician who specializes in ADHD at his Grand Rapids, Michigan-based practice, said “there hasn’t been a single specialty that has taken lead responsibility in adult ADHD,” which has contributed to the lag in guideline development.
In addition, Dr. Mason said, “trying to come up with adult guidelines even 5 or 10 years ago wouldn’t have yielded nearly as robust a set of guidelines because it’s taken awhile to have the evidence base to be able to make a few pronouncements really confidently.”
Not only has the evidence base grown but so has telehealth, especially during the height of the COVID-19 pandemic. That led to concerns that ADHD was not rigorously evaluated and that stimulants were prescribed too easily, said Dr. Goodman.
Several telehealth providers came under federal scrutiny, with the DEA accusing Cerebral’s pharmacy of dispensing stimulants for nonmedical reasons. The agency said that some 72,000 prescriptions for controlled substances, mostly stimulants, were written between 2020 and 2022.
APSARD felt it was time to act, said Dr. Goodman.
“We could not allow entrepreneurs who felt there was a business opportunity here to, under the auspices of advocating for mental health, increase the distribution of potentially addictive medications in the community,” he said
Ensuring Psychiatrist Buy-In
Development of the APSARD guidelines is led by Thomas Spencer, MD, a retired associate professor of psychiatry at Harvard Medical School, and Frances Rudnick Levin, MD, the Kennedy-Leavy Professor of Psychiatry at Columbia University, both of whom have decades of experience and clinical work in adults with ADHD.
Dr. Goodman is joined on the executive committee by Lenard Adler, MD (NYU Grossman School of Medicine), and Stephen Faraone, PhD (SUNY Upstate Medical University), along with 30 others who have expertise in psychiatry, psychology, primary care, and other health professions.
To participate in the development of the guidelines, experts had to agree to disengage from any potential conflicts and devote themselves — unpaid — to the process, said Dr. Goodman. The goal is to head off any charges of conflicts or biases, he said.
Three subcommittees — diagnosis and assessment, medical treatment, and nonmedical treatment — will review the literature, grade the evidence base, and use the Delphi consensus method to write the draft guidelines.
The draft will go out to the public and to medical specialties for comment, which will be considered for inclusion in the final publication, said Dr. Goodman.
The guidelines panel has been working closely with the APA and following the APA guideline development process in an effort to get buy-in from psychiatrists, he said.
Critical Educational Tool
“Doctors are often surprised to hear that there are no guidelines for adult ADHD in the US,” said Ann Childress, MD, APSARD president, when the group announced its effort in 2023. “Whether diagnosis and treatment are provided in office or online, the standard of care should be the same throughout the country,” she said.
Guidelines will “reduce mythology and error or at least when we run into mythology and error we can say no, there’s a giant consensus with hundreds of experts that disagree with that and so if you want to counter that you better bring some heavy machinery, you can’t just throw out an opinion and leave it unsupported,” said Dr. Mason.
Dr. Sibley said that, although there are no good data, anecdotally it appears many clinicians rely on the Diagnostic and Statistical Manual of Mental Disorders (DSM) when treating adults with ADHD.
The DSM “tells people what they should do but it doesn’t exactly tell them what’s the best way to do it,” she said, adding that often physicians follow what they learned from whoever they were trained by.
“Some people have been trained by people who are well versed in best practices and so they might be doing things that we would say have a research support to them, and other people might be doing things based on people who developed their own opinions about the best way to diagnose ADHD based on lived experience which may or may not be best practices,” Dr. Sibley said.
Her subcommittee aims to offer guidance on screening “that will be helpful in primary care, in terms of what are the most efficient ways to do it” and to help with accuracy, she said. Currently, there are likely some clinicians who are making too liberal a diagnosis and others who are making too conservative a diagnosis, she said.
With so many clinicians — especially in primary care — having a lack of experience, the guidelines could increase “the ability for more different kinds of providers to help,” said Dr. Kulikosky.
Guidelines should also provide a template for ongoing education, especially for clinicians who have never received any training in ADHD.
Dr. Goodman said it is increasingly likely that primary care physicians will be writing more prescriptions for ADHD medications than psychiatrists. “If that is the trajectory, the education of those providers seeing these patients is critical,” he said.
Offering Standards, Dispelling Myths
Guidelines can also help “shorten the learning curve,” said Dr. Mason, who said that he’s had to piece together evidence over the last few decades. Once published, the standards can be used in residency, for board exams, and continuing medical education, he said.
Not only do they offer a “kind of a shortcut to what we all know and agree on,” they also specify where the edges of knowledge are, he said.
Guidelines can also dissuade clinicians from practices that have no evidence to support them, such as “medication holidays,” said Dr. Mason. That has been employed to give children, especially, a break from side effects, but studies have shown that it actually increases side effects, he said.
Dr. Goodman and Dr. Sibley expect the guidelines to help with the challenge of diagnosis. Approximately 38% of adults with ADHD have a mood disorder and 48% have anxiety, said Dr. Goodman. Many others have coexisting posttraumatic stress disorder, substance use disorders, or medical illnesses that compound cognitive problems.
If an individual has several psychiatric conditions, “the question is how do you diagnostically prioritize which you treat first, second, and third, with the goal of treating one without making the others worse,” said Dr. Goodman.
“ADHD takes more detective work than other disorders,” said Dr. Sibley, adding that without an objective diagnostic and with overlaps with other comorbid disorders, “there are very complex issues that all of us wrestle with.”
While the guidelines will not provide algorithms, they will provide information that “will help guide them in the tougher diagnostic context,” she said.
Dr. Mason agreed. “It’s a complicated disorder to diagnose and treat. It’s hard for somebody to jump into it. [The guidelines] are going to give us — here’s what you really have to know, here’s what you have to do,” he said.
And it won’t just be clinicians who look to the guidelines. Calls to National Resource Center on ADHD — which CHADD runs for the federal government — from adults wanting to know more about their own condition “have increased exponentially” in the last few years, said Dr. Kulikosky. “We know adults are seeking out information, they are seeking out diagnosis and treatment,” she said.
Dr. Goodman and Dr. Sibley reported no relevant financial relationships. Dr. Mason reported that he consults for Otsuka and is a speaker for Iron Shore.
A version of this article first appeared on Medscape.com.
The first US clinical guidelines to diagnose and treat attention-deficit/hyperactivity disorder (ADHD) in adults are expected to be released this fall, providing patients, clinicians, insurers, and policymakers with a long overdue and much-needed standardized framework.
The initiative comes under the auspices of the American Professional Society of ADHD and Related Disorders (APSARD). David Goodman, MD, a member of the APSARD guidelines executive committee and assistant professor in the Department of Psychiatry and Behavioral Sciences at Johns Hopkins School of Medicine in Baltimore, Maryland, noted that the US lags behind several other nations, including Canada, the United Kingdom, Australia, and New Zealand who already have guidelines in place.
Dr. Goodman would not go into any detail as to why the country has been so slow off the mark but told this news organization that in part it has been due to a lack of specific funding. In addition, he said, “adult psychiatry abdicated responsibility for ADHD in adults.”
The American Psychiatric Association (APA) would not comment, although a spokesperson said two of its members are working with APSARD on the guidelines.
Estimates show that there are 10-11 million American adults (4.4%) with ADHD, making it the second most common psychiatric disorder in adults.
Surveys show that mental health professionals, including psychiatrists, report a lack of familiarity with ADHD in adults, said Margaret Sibley, PhD, professor of psychiatry and behavioral sciences at the University of Washington School of Medicine in Seattle and chair of the APSARD guidelines diagnostic and screening committee.
Many don’t consider an ADHD diagnosis in adults “because they were always trained to conceptualize it as something that’s relevant only in childhood,” Dr. Sibley told this new organization. However, research shows that people with ADHD do not outgrow the disorder.
“ADHD itself is still present and has unique problems associated with it in adults,” Dr. Sibley said.
Filling the Leadership Gap
Laurie Kulikosky, CEO of the advocacy group CHADD, said that the organization views the development of guidelines “as a huge step forward in the ability for more people to understand ADHD, particularly on the adult side.”
Oren Mason, MD, a primary care physician who specializes in ADHD at his Grand Rapids, Michigan-based practice, said “there hasn’t been a single specialty that has taken lead responsibility in adult ADHD,” which has contributed to the lag in guideline development.
In addition, Dr. Mason said, “trying to come up with adult guidelines even 5 or 10 years ago wouldn’t have yielded nearly as robust a set of guidelines because it’s taken awhile to have the evidence base to be able to make a few pronouncements really confidently.”
Not only has the evidence base grown but so has telehealth, especially during the height of the COVID-19 pandemic. That led to concerns that ADHD was not rigorously evaluated and that stimulants were prescribed too easily, said Dr. Goodman.
Several telehealth providers came under federal scrutiny, with the DEA accusing Cerebral’s pharmacy of dispensing stimulants for nonmedical reasons. The agency said that some 72,000 prescriptions for controlled substances, mostly stimulants, were written between 2020 and 2022.
APSARD felt it was time to act, said Dr. Goodman.
“We could not allow entrepreneurs who felt there was a business opportunity here to, under the auspices of advocating for mental health, increase the distribution of potentially addictive medications in the community,” he said
Ensuring Psychiatrist Buy-In
Development of the APSARD guidelines is led by Thomas Spencer, MD, a retired associate professor of psychiatry at Harvard Medical School, and Frances Rudnick Levin, MD, the Kennedy-Leavy Professor of Psychiatry at Columbia University, both of whom have decades of experience and clinical work in adults with ADHD.
Dr. Goodman is joined on the executive committee by Lenard Adler, MD (NYU Grossman School of Medicine), and Stephen Faraone, PhD (SUNY Upstate Medical University), along with 30 others who have expertise in psychiatry, psychology, primary care, and other health professions.
To participate in the development of the guidelines, experts had to agree to disengage from any potential conflicts and devote themselves — unpaid — to the process, said Dr. Goodman. The goal is to head off any charges of conflicts or biases, he said.
Three subcommittees — diagnosis and assessment, medical treatment, and nonmedical treatment — will review the literature, grade the evidence base, and use the Delphi consensus method to write the draft guidelines.
The draft will go out to the public and to medical specialties for comment, which will be considered for inclusion in the final publication, said Dr. Goodman.
The guidelines panel has been working closely with the APA and following the APA guideline development process in an effort to get buy-in from psychiatrists, he said.
Critical Educational Tool
“Doctors are often surprised to hear that there are no guidelines for adult ADHD in the US,” said Ann Childress, MD, APSARD president, when the group announced its effort in 2023. “Whether diagnosis and treatment are provided in office or online, the standard of care should be the same throughout the country,” she said.
Guidelines will “reduce mythology and error or at least when we run into mythology and error we can say no, there’s a giant consensus with hundreds of experts that disagree with that and so if you want to counter that you better bring some heavy machinery, you can’t just throw out an opinion and leave it unsupported,” said Dr. Mason.
Dr. Sibley said that, although there are no good data, anecdotally it appears many clinicians rely on the Diagnostic and Statistical Manual of Mental Disorders (DSM) when treating adults with ADHD.
The DSM “tells people what they should do but it doesn’t exactly tell them what’s the best way to do it,” she said, adding that often physicians follow what they learned from whoever they were trained by.
“Some people have been trained by people who are well versed in best practices and so they might be doing things that we would say have a research support to them, and other people might be doing things based on people who developed their own opinions about the best way to diagnose ADHD based on lived experience which may or may not be best practices,” Dr. Sibley said.
Her subcommittee aims to offer guidance on screening “that will be helpful in primary care, in terms of what are the most efficient ways to do it” and to help with accuracy, she said. Currently, there are likely some clinicians who are making too liberal a diagnosis and others who are making too conservative a diagnosis, she said.
With so many clinicians — especially in primary care — having a lack of experience, the guidelines could increase “the ability for more different kinds of providers to help,” said Dr. Kulikosky.
Guidelines should also provide a template for ongoing education, especially for clinicians who have never received any training in ADHD.
Dr. Goodman said it is increasingly likely that primary care physicians will be writing more prescriptions for ADHD medications than psychiatrists. “If that is the trajectory, the education of those providers seeing these patients is critical,” he said.
Offering Standards, Dispelling Myths
Guidelines can also help “shorten the learning curve,” said Dr. Mason, who said that he’s had to piece together evidence over the last few decades. Once published, the standards can be used in residency, for board exams, and continuing medical education, he said.
Not only do they offer a “kind of a shortcut to what we all know and agree on,” they also specify where the edges of knowledge are, he said.
Guidelines can also dissuade clinicians from practices that have no evidence to support them, such as “medication holidays,” said Dr. Mason. That has been employed to give children, especially, a break from side effects, but studies have shown that it actually increases side effects, he said.
Dr. Goodman and Dr. Sibley expect the guidelines to help with the challenge of diagnosis. Approximately 38% of adults with ADHD have a mood disorder and 48% have anxiety, said Dr. Goodman. Many others have coexisting posttraumatic stress disorder, substance use disorders, or medical illnesses that compound cognitive problems.
If an individual has several psychiatric conditions, “the question is how do you diagnostically prioritize which you treat first, second, and third, with the goal of treating one without making the others worse,” said Dr. Goodman.
“ADHD takes more detective work than other disorders,” said Dr. Sibley, adding that without an objective diagnostic and with overlaps with other comorbid disorders, “there are very complex issues that all of us wrestle with.”
While the guidelines will not provide algorithms, they will provide information that “will help guide them in the tougher diagnostic context,” she said.
Dr. Mason agreed. “It’s a complicated disorder to diagnose and treat. It’s hard for somebody to jump into it. [The guidelines] are going to give us — here’s what you really have to know, here’s what you have to do,” he said.
And it won’t just be clinicians who look to the guidelines. Calls to National Resource Center on ADHD — which CHADD runs for the federal government — from adults wanting to know more about their own condition “have increased exponentially” in the last few years, said Dr. Kulikosky. “We know adults are seeking out information, they are seeking out diagnosis and treatment,” she said.
Dr. Goodman and Dr. Sibley reported no relevant financial relationships. Dr. Mason reported that he consults for Otsuka and is a speaker for Iron Shore.
A version of this article first appeared on Medscape.com.
The first US clinical guidelines to diagnose and treat attention-deficit/hyperactivity disorder (ADHD) in adults are expected to be released this fall, providing patients, clinicians, insurers, and policymakers with a long overdue and much-needed standardized framework.
The initiative comes under the auspices of the American Professional Society of ADHD and Related Disorders (APSARD). David Goodman, MD, a member of the APSARD guidelines executive committee and assistant professor in the Department of Psychiatry and Behavioral Sciences at Johns Hopkins School of Medicine in Baltimore, Maryland, noted that the US lags behind several other nations, including Canada, the United Kingdom, Australia, and New Zealand who already have guidelines in place.
Dr. Goodman would not go into any detail as to why the country has been so slow off the mark but told this news organization that in part it has been due to a lack of specific funding. In addition, he said, “adult psychiatry abdicated responsibility for ADHD in adults.”
The American Psychiatric Association (APA) would not comment, although a spokesperson said two of its members are working with APSARD on the guidelines.
Estimates show that there are 10-11 million American adults (4.4%) with ADHD, making it the second most common psychiatric disorder in adults.
Surveys show that mental health professionals, including psychiatrists, report a lack of familiarity with ADHD in adults, said Margaret Sibley, PhD, professor of psychiatry and behavioral sciences at the University of Washington School of Medicine in Seattle and chair of the APSARD guidelines diagnostic and screening committee.
Many don’t consider an ADHD diagnosis in adults “because they were always trained to conceptualize it as something that’s relevant only in childhood,” Dr. Sibley told this new organization. However, research shows that people with ADHD do not outgrow the disorder.
“ADHD itself is still present and has unique problems associated with it in adults,” Dr. Sibley said.
Filling the Leadership Gap
Laurie Kulikosky, CEO of the advocacy group CHADD, said that the organization views the development of guidelines “as a huge step forward in the ability for more people to understand ADHD, particularly on the adult side.”
Oren Mason, MD, a primary care physician who specializes in ADHD at his Grand Rapids, Michigan-based practice, said “there hasn’t been a single specialty that has taken lead responsibility in adult ADHD,” which has contributed to the lag in guideline development.
In addition, Dr. Mason said, “trying to come up with adult guidelines even 5 or 10 years ago wouldn’t have yielded nearly as robust a set of guidelines because it’s taken awhile to have the evidence base to be able to make a few pronouncements really confidently.”
Not only has the evidence base grown but so has telehealth, especially during the height of the COVID-19 pandemic. That led to concerns that ADHD was not rigorously evaluated and that stimulants were prescribed too easily, said Dr. Goodman.
Several telehealth providers came under federal scrutiny, with the DEA accusing Cerebral’s pharmacy of dispensing stimulants for nonmedical reasons. The agency said that some 72,000 prescriptions for controlled substances, mostly stimulants, were written between 2020 and 2022.
APSARD felt it was time to act, said Dr. Goodman.
“We could not allow entrepreneurs who felt there was a business opportunity here to, under the auspices of advocating for mental health, increase the distribution of potentially addictive medications in the community,” he said
Ensuring Psychiatrist Buy-In
Development of the APSARD guidelines is led by Thomas Spencer, MD, a retired associate professor of psychiatry at Harvard Medical School, and Frances Rudnick Levin, MD, the Kennedy-Leavy Professor of Psychiatry at Columbia University, both of whom have decades of experience and clinical work in adults with ADHD.
Dr. Goodman is joined on the executive committee by Lenard Adler, MD (NYU Grossman School of Medicine), and Stephen Faraone, PhD (SUNY Upstate Medical University), along with 30 others who have expertise in psychiatry, psychology, primary care, and other health professions.
To participate in the development of the guidelines, experts had to agree to disengage from any potential conflicts and devote themselves — unpaid — to the process, said Dr. Goodman. The goal is to head off any charges of conflicts or biases, he said.
Three subcommittees — diagnosis and assessment, medical treatment, and nonmedical treatment — will review the literature, grade the evidence base, and use the Delphi consensus method to write the draft guidelines.
The draft will go out to the public and to medical specialties for comment, which will be considered for inclusion in the final publication, said Dr. Goodman.
The guidelines panel has been working closely with the APA and following the APA guideline development process in an effort to get buy-in from psychiatrists, he said.
Critical Educational Tool
“Doctors are often surprised to hear that there are no guidelines for adult ADHD in the US,” said Ann Childress, MD, APSARD president, when the group announced its effort in 2023. “Whether diagnosis and treatment are provided in office or online, the standard of care should be the same throughout the country,” she said.
Guidelines will “reduce mythology and error or at least when we run into mythology and error we can say no, there’s a giant consensus with hundreds of experts that disagree with that and so if you want to counter that you better bring some heavy machinery, you can’t just throw out an opinion and leave it unsupported,” said Dr. Mason.
Dr. Sibley said that, although there are no good data, anecdotally it appears many clinicians rely on the Diagnostic and Statistical Manual of Mental Disorders (DSM) when treating adults with ADHD.
The DSM “tells people what they should do but it doesn’t exactly tell them what’s the best way to do it,” she said, adding that often physicians follow what they learned from whoever they were trained by.
“Some people have been trained by people who are well versed in best practices and so they might be doing things that we would say have a research support to them, and other people might be doing things based on people who developed their own opinions about the best way to diagnose ADHD based on lived experience which may or may not be best practices,” Dr. Sibley said.
Her subcommittee aims to offer guidance on screening “that will be helpful in primary care, in terms of what are the most efficient ways to do it” and to help with accuracy, she said. Currently, there are likely some clinicians who are making too liberal a diagnosis and others who are making too conservative a diagnosis, she said.
With so many clinicians — especially in primary care — having a lack of experience, the guidelines could increase “the ability for more different kinds of providers to help,” said Dr. Kulikosky.
Guidelines should also provide a template for ongoing education, especially for clinicians who have never received any training in ADHD.
Dr. Goodman said it is increasingly likely that primary care physicians will be writing more prescriptions for ADHD medications than psychiatrists. “If that is the trajectory, the education of those providers seeing these patients is critical,” he said.
Offering Standards, Dispelling Myths
Guidelines can also help “shorten the learning curve,” said Dr. Mason, who said that he’s had to piece together evidence over the last few decades. Once published, the standards can be used in residency, for board exams, and continuing medical education, he said.
Not only do they offer a “kind of a shortcut to what we all know and agree on,” they also specify where the edges of knowledge are, he said.
Guidelines can also dissuade clinicians from practices that have no evidence to support them, such as “medication holidays,” said Dr. Mason. That has been employed to give children, especially, a break from side effects, but studies have shown that it actually increases side effects, he said.
Dr. Goodman and Dr. Sibley expect the guidelines to help with the challenge of diagnosis. Approximately 38% of adults with ADHD have a mood disorder and 48% have anxiety, said Dr. Goodman. Many others have coexisting posttraumatic stress disorder, substance use disorders, or medical illnesses that compound cognitive problems.
If an individual has several psychiatric conditions, “the question is how do you diagnostically prioritize which you treat first, second, and third, with the goal of treating one without making the others worse,” said Dr. Goodman.
“ADHD takes more detective work than other disorders,” said Dr. Sibley, adding that without an objective diagnostic and with overlaps with other comorbid disorders, “there are very complex issues that all of us wrestle with.”
While the guidelines will not provide algorithms, they will provide information that “will help guide them in the tougher diagnostic context,” she said.
Dr. Mason agreed. “It’s a complicated disorder to diagnose and treat. It’s hard for somebody to jump into it. [The guidelines] are going to give us — here’s what you really have to know, here’s what you have to do,” he said.
And it won’t just be clinicians who look to the guidelines. Calls to National Resource Center on ADHD — which CHADD runs for the federal government — from adults wanting to know more about their own condition “have increased exponentially” in the last few years, said Dr. Kulikosky. “We know adults are seeking out information, they are seeking out diagnosis and treatment,” she said.
Dr. Goodman and Dr. Sibley reported no relevant financial relationships. Dr. Mason reported that he consults for Otsuka and is a speaker for Iron Shore.
A version of this article first appeared on Medscape.com.
Common Household Chemicals Tied to Brain Cell Damage
Two classes of chemicals present in common household products may impair the development of oligodendrocytes, the myelinating cells of the central nervous system (CNS), which are critical to brain development and function. However, the researchers as well as outside experts agree more research is needed before any firm conclusions can be drawn.
Quaternary ammonium compounds, ubiquitous in disinfecting agents and personal care products, and organophosphate flame retardants, which are commonly found in household items such as furniture and electronics had “surprising effects specifically on the non-nerve cells in the brain,” said lead researcher Paul Tesar, PhD, professor and director of the Institute for Glial Sciences, Case Western Reserve University School of Medicine, Cleveland.
“Other studies have shown that our exposures to the chemicals in disinfecting agents nearly doubled during the pandemic,” Dr. Tesar noted. The finding that quaternary ammonium chemicals in disinfecting agents are harmful to specific brain cells suggests “we need to think about our increased utilization and exposure,” he added.
The results were published online on March 25 in Nature Neuroscience.
Motor Dysfunction
Exposure to various chemicals in the environment has been shown to impair brain development. However, most of this research has focused on neurons. Less is known about effects on oligodendrocytes, which form the electrical insulation around the axons of CNS cells.
The researchers analyzed the effects of 1823 chemicals on mouse oligodendrocyte development in cell cultures. They identified 292 chemicals that cause oligodendrocytes to die and 47 that inhibit oligodendrocyte generation. These chemicals belonged to two different classes.
They found that quaternary compounds were potently and selectively cytotoxic to developing oligodendrocytes and that organophosphate flame retardants prematurely arrested oligodendrocyte maturation. These effects were confirmed in mice and cultured human oligodendrocytes.
In addition, an analysis of epidemiologic data from the National Health and Nutrition Examination Survey (2013-2018) showed that one flame retardant metabolite, bis(1,3-dichloro-2-propy) phosphate (BDCIPP), was present in nearly all urine samples of children aged 3-11 years who were examined (1753 out of 1763 children).
After adjustment for multiple confounding factors, results showed that compared with children with urinary BDCIPP concentration in the lowest quartile, those with concentrations in the highest quartile were twice as likely to require special education (adjusted odds ratio [aOR], 2.0; 95% CI, 1.0-3.8) and were six times as likely to have gross motor dysfunction (aOR, 6.0; 95% CI, 1.7-21.9).
Children with urinary BDCIPP concentration within the third quartile also had significantly increased odds of motor dysfunction (aOR, 4.2; 95% CI, 1.1-16.2).
“These results suggest that the identified chemicals are potentially hazardous to human health. However, we want to be clear that more studies are needed to make definitive connections between chemical exposure and human disease,” said Dr. Tesar.
“Future studies will need to deepen our understanding of the duration and timing of exposure required to initiate or exacerbate disease. This information is needed before specific recommendations, such as behavioral interventions, can be made to reduce exposure. Some of these chemicals have useful roles in our homes, but we need to consider how they’re being used and what level of exposure might be considered safe,” Dr. Tesar said.
In his view, the results “provide a starting point to understand what exposure levels to these chemicals might be putting ourselves or kids at risk for toxicity.”
Too Soon to Tell
Commenting for this news organization, Shaheen Lakhan, MD, a neurologist and researcher based in Miami, who was not involved in the study, echoed the need for more research.
“The biological mechanisms uncovered provide plausible pathways by which these chemicals could potentially impact human brain development related to oligodendrocytes and myelination. Oligodendrocytes play a critical role in plastic neurological processes throughout life, not just early neurodevelopment. So, disrupting their maturation and function theoretically could contribute to neurodevelopmental disorders as well as adult conditions like multiple sclerosis,” Dr. Lakhan said.
“This study alone shouldn’t sound neurotoxicant alarms yet. We’ve seen many past chemical scares like saccharin and phthalates fizzle despite alarming lab results when real-world human brain impacts failed to materialize,” Dr. Lakhan cautioned.
“Far more rigorous research directly linking household chemical exposures to cognitive deficits in people is still needed before drawing firm conclusions or prompting overreactions from the general public. Policymakers will eventually need to weigh potential risks vs benefits, but no definitive human health threat has currently been established,” Dr. Lakhan said.
Sarah Evans, PhD, MPH, assistant professor in the Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai in New York, also emphasized the need for further study.
“Given that most of the experiments in this study were conducted in isolated cells and a mouse model, further research is needed to determine whether exposure to these chemicals at levels experienced by the general population during critical windows of development impairs myelination and leads to adverse health outcomes like learning and behavior problems in humans,” said Dr. Evans, who was involved in the study.
“The authors’ finding of an association between higher urinary levels of the organophosphate flame-retardant metabolite BDCIPP and gross motor problems or need for special education in children aged 3-11 years in the CDC National Health and Nutrition Examination Survey strengthens their laboratory findings and warrants further investigation,” Dr. Evans added.
The research was supported by grants from the National Institutes of Health, National Multiple Sclerosis Society, Howard Hughes Medical Institute and New York Stem Cell Foundation, and philanthropic support by sTF5 Care and the Long, Walter, Peterson, Goodman, and Geller families. Dr. Tesar, Dr. Lakhan, and Dr. Evans report no relevant disclosures.
A version of this article appeared on Medscape.com.
Two classes of chemicals present in common household products may impair the development of oligodendrocytes, the myelinating cells of the central nervous system (CNS), which are critical to brain development and function. However, the researchers as well as outside experts agree more research is needed before any firm conclusions can be drawn.
Quaternary ammonium compounds, ubiquitous in disinfecting agents and personal care products, and organophosphate flame retardants, which are commonly found in household items such as furniture and electronics had “surprising effects specifically on the non-nerve cells in the brain,” said lead researcher Paul Tesar, PhD, professor and director of the Institute for Glial Sciences, Case Western Reserve University School of Medicine, Cleveland.
“Other studies have shown that our exposures to the chemicals in disinfecting agents nearly doubled during the pandemic,” Dr. Tesar noted. The finding that quaternary ammonium chemicals in disinfecting agents are harmful to specific brain cells suggests “we need to think about our increased utilization and exposure,” he added.
The results were published online on March 25 in Nature Neuroscience.
Motor Dysfunction
Exposure to various chemicals in the environment has been shown to impair brain development. However, most of this research has focused on neurons. Less is known about effects on oligodendrocytes, which form the electrical insulation around the axons of CNS cells.
The researchers analyzed the effects of 1823 chemicals on mouse oligodendrocyte development in cell cultures. They identified 292 chemicals that cause oligodendrocytes to die and 47 that inhibit oligodendrocyte generation. These chemicals belonged to two different classes.
They found that quaternary compounds were potently and selectively cytotoxic to developing oligodendrocytes and that organophosphate flame retardants prematurely arrested oligodendrocyte maturation. These effects were confirmed in mice and cultured human oligodendrocytes.
In addition, an analysis of epidemiologic data from the National Health and Nutrition Examination Survey (2013-2018) showed that one flame retardant metabolite, bis(1,3-dichloro-2-propy) phosphate (BDCIPP), was present in nearly all urine samples of children aged 3-11 years who were examined (1753 out of 1763 children).
After adjustment for multiple confounding factors, results showed that compared with children with urinary BDCIPP concentration in the lowest quartile, those with concentrations in the highest quartile were twice as likely to require special education (adjusted odds ratio [aOR], 2.0; 95% CI, 1.0-3.8) and were six times as likely to have gross motor dysfunction (aOR, 6.0; 95% CI, 1.7-21.9).
Children with urinary BDCIPP concentration within the third quartile also had significantly increased odds of motor dysfunction (aOR, 4.2; 95% CI, 1.1-16.2).
“These results suggest that the identified chemicals are potentially hazardous to human health. However, we want to be clear that more studies are needed to make definitive connections between chemical exposure and human disease,” said Dr. Tesar.
“Future studies will need to deepen our understanding of the duration and timing of exposure required to initiate or exacerbate disease. This information is needed before specific recommendations, such as behavioral interventions, can be made to reduce exposure. Some of these chemicals have useful roles in our homes, but we need to consider how they’re being used and what level of exposure might be considered safe,” Dr. Tesar said.
In his view, the results “provide a starting point to understand what exposure levels to these chemicals might be putting ourselves or kids at risk for toxicity.”
Too Soon to Tell
Commenting for this news organization, Shaheen Lakhan, MD, a neurologist and researcher based in Miami, who was not involved in the study, echoed the need for more research.
“The biological mechanisms uncovered provide plausible pathways by which these chemicals could potentially impact human brain development related to oligodendrocytes and myelination. Oligodendrocytes play a critical role in plastic neurological processes throughout life, not just early neurodevelopment. So, disrupting their maturation and function theoretically could contribute to neurodevelopmental disorders as well as adult conditions like multiple sclerosis,” Dr. Lakhan said.
“This study alone shouldn’t sound neurotoxicant alarms yet. We’ve seen many past chemical scares like saccharin and phthalates fizzle despite alarming lab results when real-world human brain impacts failed to materialize,” Dr. Lakhan cautioned.
“Far more rigorous research directly linking household chemical exposures to cognitive deficits in people is still needed before drawing firm conclusions or prompting overreactions from the general public. Policymakers will eventually need to weigh potential risks vs benefits, but no definitive human health threat has currently been established,” Dr. Lakhan said.
Sarah Evans, PhD, MPH, assistant professor in the Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai in New York, also emphasized the need for further study.
“Given that most of the experiments in this study were conducted in isolated cells and a mouse model, further research is needed to determine whether exposure to these chemicals at levels experienced by the general population during critical windows of development impairs myelination and leads to adverse health outcomes like learning and behavior problems in humans,” said Dr. Evans, who was involved in the study.
“The authors’ finding of an association between higher urinary levels of the organophosphate flame-retardant metabolite BDCIPP and gross motor problems or need for special education in children aged 3-11 years in the CDC National Health and Nutrition Examination Survey strengthens their laboratory findings and warrants further investigation,” Dr. Evans added.
The research was supported by grants from the National Institutes of Health, National Multiple Sclerosis Society, Howard Hughes Medical Institute and New York Stem Cell Foundation, and philanthropic support by sTF5 Care and the Long, Walter, Peterson, Goodman, and Geller families. Dr. Tesar, Dr. Lakhan, and Dr. Evans report no relevant disclosures.
A version of this article appeared on Medscape.com.
Two classes of chemicals present in common household products may impair the development of oligodendrocytes, the myelinating cells of the central nervous system (CNS), which are critical to brain development and function. However, the researchers as well as outside experts agree more research is needed before any firm conclusions can be drawn.
Quaternary ammonium compounds, ubiquitous in disinfecting agents and personal care products, and organophosphate flame retardants, which are commonly found in household items such as furniture and electronics had “surprising effects specifically on the non-nerve cells in the brain,” said lead researcher Paul Tesar, PhD, professor and director of the Institute for Glial Sciences, Case Western Reserve University School of Medicine, Cleveland.
“Other studies have shown that our exposures to the chemicals in disinfecting agents nearly doubled during the pandemic,” Dr. Tesar noted. The finding that quaternary ammonium chemicals in disinfecting agents are harmful to specific brain cells suggests “we need to think about our increased utilization and exposure,” he added.
The results were published online on March 25 in Nature Neuroscience.
Motor Dysfunction
Exposure to various chemicals in the environment has been shown to impair brain development. However, most of this research has focused on neurons. Less is known about effects on oligodendrocytes, which form the electrical insulation around the axons of CNS cells.
The researchers analyzed the effects of 1823 chemicals on mouse oligodendrocyte development in cell cultures. They identified 292 chemicals that cause oligodendrocytes to die and 47 that inhibit oligodendrocyte generation. These chemicals belonged to two different classes.
They found that quaternary compounds were potently and selectively cytotoxic to developing oligodendrocytes and that organophosphate flame retardants prematurely arrested oligodendrocyte maturation. These effects were confirmed in mice and cultured human oligodendrocytes.
In addition, an analysis of epidemiologic data from the National Health and Nutrition Examination Survey (2013-2018) showed that one flame retardant metabolite, bis(1,3-dichloro-2-propy) phosphate (BDCIPP), was present in nearly all urine samples of children aged 3-11 years who were examined (1753 out of 1763 children).
After adjustment for multiple confounding factors, results showed that compared with children with urinary BDCIPP concentration in the lowest quartile, those with concentrations in the highest quartile were twice as likely to require special education (adjusted odds ratio [aOR], 2.0; 95% CI, 1.0-3.8) and were six times as likely to have gross motor dysfunction (aOR, 6.0; 95% CI, 1.7-21.9).
Children with urinary BDCIPP concentration within the third quartile also had significantly increased odds of motor dysfunction (aOR, 4.2; 95% CI, 1.1-16.2).
“These results suggest that the identified chemicals are potentially hazardous to human health. However, we want to be clear that more studies are needed to make definitive connections between chemical exposure and human disease,” said Dr. Tesar.
“Future studies will need to deepen our understanding of the duration and timing of exposure required to initiate or exacerbate disease. This information is needed before specific recommendations, such as behavioral interventions, can be made to reduce exposure. Some of these chemicals have useful roles in our homes, but we need to consider how they’re being used and what level of exposure might be considered safe,” Dr. Tesar said.
In his view, the results “provide a starting point to understand what exposure levels to these chemicals might be putting ourselves or kids at risk for toxicity.”
Too Soon to Tell
Commenting for this news organization, Shaheen Lakhan, MD, a neurologist and researcher based in Miami, who was not involved in the study, echoed the need for more research.
“The biological mechanisms uncovered provide plausible pathways by which these chemicals could potentially impact human brain development related to oligodendrocytes and myelination. Oligodendrocytes play a critical role in plastic neurological processes throughout life, not just early neurodevelopment. So, disrupting their maturation and function theoretically could contribute to neurodevelopmental disorders as well as adult conditions like multiple sclerosis,” Dr. Lakhan said.
“This study alone shouldn’t sound neurotoxicant alarms yet. We’ve seen many past chemical scares like saccharin and phthalates fizzle despite alarming lab results when real-world human brain impacts failed to materialize,” Dr. Lakhan cautioned.
“Far more rigorous research directly linking household chemical exposures to cognitive deficits in people is still needed before drawing firm conclusions or prompting overreactions from the general public. Policymakers will eventually need to weigh potential risks vs benefits, but no definitive human health threat has currently been established,” Dr. Lakhan said.
Sarah Evans, PhD, MPH, assistant professor in the Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai in New York, also emphasized the need for further study.
“Given that most of the experiments in this study were conducted in isolated cells and a mouse model, further research is needed to determine whether exposure to these chemicals at levels experienced by the general population during critical windows of development impairs myelination and leads to adverse health outcomes like learning and behavior problems in humans,” said Dr. Evans, who was involved in the study.
“The authors’ finding of an association between higher urinary levels of the organophosphate flame-retardant metabolite BDCIPP and gross motor problems or need for special education in children aged 3-11 years in the CDC National Health and Nutrition Examination Survey strengthens their laboratory findings and warrants further investigation,” Dr. Evans added.
The research was supported by grants from the National Institutes of Health, National Multiple Sclerosis Society, Howard Hughes Medical Institute and New York Stem Cell Foundation, and philanthropic support by sTF5 Care and the Long, Walter, Peterson, Goodman, and Geller families. Dr. Tesar, Dr. Lakhan, and Dr. Evans report no relevant disclosures.
A version of this article appeared on Medscape.com.