Heidi Splete

Declines in verbal working memory were significantly associated with an increased risk of relapse in remitted psychosis patients, based on data from 110 individuals.

Previous research has suggested that cognitive impairments may predict recurrent psychotic episodes, but data on the association between specific cognitive deficits and relapse of psychosis over time are limited, wrote Tiffany J. Tao, MPhil, a PhD candidate at the University of Hong Kong, and colleagues.

In a naturalistic 1-year follow-up study published in Psychiatry Research , the researchers recruited psychosis patients with full remission for a least 6 months from two outpatient psychiatric clinics. The study population included adults aged 18-55 years, with an average age of 29.2 years; 62% were women. Relapse, defined as a recurrence of psychotic symptoms measured by the Positive and Negative Syndrome Scale (PANSS) and the Clinical Global Impression Scale, was assessed monthly via phone interviews with the use of a smartphone app. Cognitive decline was based on working memory deterioration, assessed monthly via the Visual Patterns Test (VPT) and the Letter-Number Sequencing (LNS) test, respectively, for visual and verbal working memory.

Ms. Tao

Overall, 18 patients (16%) experienced a relapse at 1 year. One-third of these (six patients) required hospitalization, with a median hospital stay of 23 days.

In a multivariate analysis, independent and significant predictors of relapse were verbal working memory deterioration 2 months prior to relapse (P = .029), worse medication adherence (P = .018), and less resilience (P = .014) with odds ratios of 9.445, 0.051, and 0.769, respectively.

“Specifically, declines in verbal working memory were observed beginning at 2 months prior to the relapse episode in both the univariate and multivariate models after controlling for other significant predictors,” the researchers wrote in their discussion.

The mechanism of action for the association remains unclear, but cognitive impairment might reflect dopamine dysregulation or other processes in the prefrontal cortex that could contribute to psychotic relapse, they said.

Other factors include the associations between cognitive impairment and medication nonadherence, and the impact of cognitive impairment on a patient’s ability to manage the stresses of daily living that could trigger a psychotic relapse, they added.

Notably, the current study identified verbal working memory, but not visual working memory, as a predictor of relapse, which is important given the different neurobiological bases for visual and verbal tasks, the researchers wrote.

The study findings were limited by several factors including the inability to identify weaker predictors of relapse given the low relapse rate, and potential lack of generalizability to other less homogeneous populations, and the exclusion of patients with illicit drug use, the researchers noted.

However, the results were strengthened by the prospective measurements that prevented recall bias, and the inclusion of other objective predictors of relapse. The findings highlight the potential for early intervention to prevent relapse based on cognitive assessment, which can be measured objectively in the clinical setting or remotely from home using digital technology, they concluded.

The study received no outside funding. Ms. Tao had no financial conflicts to disclose.

Declines in verbal working memory were significantly associated with an increased risk of relapse in remitted psychosis patients, based on data from 110 individuals.

Previous research has suggested that cognitive impairments may predict recurrent psychotic episodes, but data on the association between specific cognitive deficits and relapse of psychosis over time are limited, wrote Tiffany J. Tao, MPhil, a PhD candidate at the University of Hong Kong, and colleagues.

In a naturalistic 1-year follow-up study published in Psychiatry Research , the researchers recruited psychosis patients with full remission for a least 6 months from two outpatient psychiatric clinics. The study population included adults aged 18-55 years, with an average age of 29.2 years; 62% were women. Relapse, defined as a recurrence of psychotic symptoms measured by the Positive and Negative Syndrome Scale (PANSS) and the Clinical Global Impression Scale, was assessed monthly via phone interviews with the use of a smartphone app. Cognitive decline was based on working memory deterioration, assessed monthly via the Visual Patterns Test (VPT) and the Letter-Number Sequencing (LNS) test, respectively, for visual and verbal working memory.

Ms. Tao

Overall, 18 patients (16%) experienced a relapse at 1 year. One-third of these (six patients) required hospitalization, with a median hospital stay of 23 days.

In a multivariate analysis, independent and significant predictors of relapse were verbal working memory deterioration 2 months prior to relapse (P = .029), worse medication adherence (P = .018), and less resilience (P = .014) with odds ratios of 9.445, 0.051, and 0.769, respectively.

“Specifically, declines in verbal working memory were observed beginning at 2 months prior to the relapse episode in both the univariate and multivariate models after controlling for other significant predictors,” the researchers wrote in their discussion.

The mechanism of action for the association remains unclear, but cognitive impairment might reflect dopamine dysregulation or other processes in the prefrontal cortex that could contribute to psychotic relapse, they said.

Other factors include the associations between cognitive impairment and medication nonadherence, and the impact of cognitive impairment on a patient’s ability to manage the stresses of daily living that could trigger a psychotic relapse, they added.

Notably, the current study identified verbal working memory, but not visual working memory, as a predictor of relapse, which is important given the different neurobiological bases for visual and verbal tasks, the researchers wrote.

The study findings were limited by several factors including the inability to identify weaker predictors of relapse given the low relapse rate, and potential lack of generalizability to other less homogeneous populations, and the exclusion of patients with illicit drug use, the researchers noted.

However, the results were strengthened by the prospective measurements that prevented recall bias, and the inclusion of other objective predictors of relapse. The findings highlight the potential for early intervention to prevent relapse based on cognitive assessment, which can be measured objectively in the clinical setting or remotely from home using digital technology, they concluded.

The study received no outside funding. Ms. Tao had no financial conflicts to disclose.

Declines in verbal working memory were significantly associated with an increased risk of relapse in remitted psychosis patients, based on data from 110 individuals.

Previous research has suggested that cognitive impairments may predict recurrent psychotic episodes, but data on the association between specific cognitive deficits and relapse of psychosis over time are limited, wrote Tiffany J. Tao, MPhil, a PhD candidate at the University of Hong Kong, and colleagues.

In a naturalistic 1-year follow-up study published in Psychiatry Research , the researchers recruited psychosis patients with full remission for a least 6 months from two outpatient psychiatric clinics. The study population included adults aged 18-55 years, with an average age of 29.2 years; 62% were women. Relapse, defined as a recurrence of psychotic symptoms measured by the Positive and Negative Syndrome Scale (PANSS) and the Clinical Global Impression Scale, was assessed monthly via phone interviews with the use of a smartphone app. Cognitive decline was based on working memory deterioration, assessed monthly via the Visual Patterns Test (VPT) and the Letter-Number Sequencing (LNS) test, respectively, for visual and verbal working memory.

Ms. Tao

Overall, 18 patients (16%) experienced a relapse at 1 year. One-third of these (six patients) required hospitalization, with a median hospital stay of 23 days.

In a multivariate analysis, independent and significant predictors of relapse were verbal working memory deterioration 2 months prior to relapse (P = .029), worse medication adherence (P = .018), and less resilience (P = .014) with odds ratios of 9.445, 0.051, and 0.769, respectively.

“Specifically, declines in verbal working memory were observed beginning at 2 months prior to the relapse episode in both the univariate and multivariate models after controlling for other significant predictors,” the researchers wrote in their discussion.

The mechanism of action for the association remains unclear, but cognitive impairment might reflect dopamine dysregulation or other processes in the prefrontal cortex that could contribute to psychotic relapse, they said.

Other factors include the associations between cognitive impairment and medication nonadherence, and the impact of cognitive impairment on a patient’s ability to manage the stresses of daily living that could trigger a psychotic relapse, they added.

Notably, the current study identified verbal working memory, but not visual working memory, as a predictor of relapse, which is important given the different neurobiological bases for visual and verbal tasks, the researchers wrote.

The study findings were limited by several factors including the inability to identify weaker predictors of relapse given the low relapse rate, and potential lack of generalizability to other less homogeneous populations, and the exclusion of patients with illicit drug use, the researchers noted.

However, the results were strengthened by the prospective measurements that prevented recall bias, and the inclusion of other objective predictors of relapse. The findings highlight the potential for early intervention to prevent relapse based on cognitive assessment, which can be measured objectively in the clinical setting or remotely from home using digital technology, they concluded.

The study received no outside funding. Ms. Tao had no financial conflicts to disclose.

Indigenous children or children with new abnormal auscultatory findings were significantly more likely than children in other categories to respond to oral antibiotics for exacerbations related to bronchiectasis, based on data from more than 200 individuals in New Zealand.

Children and adolescents with bronchiectasis are often treated with antibiotics for respiratory exacerbations, but the effects of antibiotics can vary among individuals, and phenotypic features associated with greater symptom resolution have not been identified, wrote Vikas Goyal, PhD, of the Centre for Children’s Health Research, Brisbane, Australia, and colleagues.

Previous studies have suggested that nearly half of exacerbations in children and adolescents resolve spontaneously after 14 days, and more data are needed to identify which patients are mostly likely to benefit from antibiotics, they noted.

In a study published in the journal Chest, the researchers reviewed secondary data from 217 children and adolescents aged 1-18 years with bronchiectasis enrolled in a pair of randomized, controlled trials comparing oral antibiotics with placebo (known as BEST-1 and BEST-2). The median age of the participants was 6.6 years, 52% were boys, and 41% were Indigenous (defined as Australian First Nations, New Zealand Maori, or Pacific Islander). All participants in the analysis received at least 14 days of oral antibiotics for treatment of nonhospitalized respiratory exacerbations.

Overall, 130 children had resolution of symptoms by day 14, and 87 were nonresponders.

In a multivariate analysis, children who were Indigenous or who had new abnormal auscultatory findings were significantly more likely to respond than children in other categories (odds ratios, 3.59 and 3.85, respectively).

Patients with multiple bronchiectatic lobes at the time of diagnosis and those with higher cough scores at the start of treatment were significantly less likely to respond to antibiotics than patients without these features (OR, 0.66 and 0.55, respectively).

The researchers conducted a further analysis to examine the association between Indigenous ethnicity and treatment response. They found no differences in the other response variables of number of affected lobes at diagnosis and cough scores at the start of treatment between Indigenous and non-Indigenous children.

Given the strong response to antibiotics among Indigenous children, the researchers also conducted a mediation analysis. “Respiratory bacterial pathogens were mediated by Indigenous ethnicity and associated with being an antibiotic ‘responder,’ ” they wrote. For new abnormal chest auscultatory findings, both direct and indirect effects on day 14 response to oral antibiotics were mediated by Indigenous ethnicity. However, neither cough scores at the start of treatment nor the number of affected lobes at diagnosis showed a mediation effect from Indigenous ethnicity.

Among the nonresponders, 59 of 87 resolved symptoms with continuing oral antibiotics over the next 2-4 weeks, and 21 improved without antibiotics.

Additionally, the detection of a respiratory virus at the start of an exacerbation was not associated with antibiotic failure at 14 days, the researchers noted.

The findings were limited by several factors including the use of data from randomized trials that were not designed to address the question in the current study, the researchers noted. Other limitations included incomplete clinical data and lack of data on inflammatory indices, potential antibiotic-resistant pathogens in nonresponders, and the follow-up period of only 14 days, they said.

However, the results suggest a role for patient and exacerbation phenotypes in management of bronchiectasis in clinical practice and promoting antimicrobial stewardship, the researchers wrote. “Although there is benefit in treating exacerbations early to avoid treatment failure and subsequent intravenous antibiotics, future research also needs to identify exacerbations that can be managed without antibiotics,” they concluded.

The BEST-1 and BEST-2 studies were supported by the Australian National Health and Medical Research Council and the NHMRC Centre for Research Excellence in Lung Health of Aboriginal and Torres Strait Islander Children. Dr. Goyal had no financial conflicts to disclose.
 

Indigenous children or children with new abnormal auscultatory findings were significantly more likely than children in other categories to respond to oral antibiotics for exacerbations related to bronchiectasis, based on data from more than 200 individuals in New Zealand.

Children and adolescents with bronchiectasis are often treated with antibiotics for respiratory exacerbations, but the effects of antibiotics can vary among individuals, and phenotypic features associated with greater symptom resolution have not been identified, wrote Vikas Goyal, PhD, of the Centre for Children’s Health Research, Brisbane, Australia, and colleagues.

Previous studies have suggested that nearly half of exacerbations in children and adolescents resolve spontaneously after 14 days, and more data are needed to identify which patients are mostly likely to benefit from antibiotics, they noted.

In a study published in the journal Chest, the researchers reviewed secondary data from 217 children and adolescents aged 1-18 years with bronchiectasis enrolled in a pair of randomized, controlled trials comparing oral antibiotics with placebo (known as BEST-1 and BEST-2). The median age of the participants was 6.6 years, 52% were boys, and 41% were Indigenous (defined as Australian First Nations, New Zealand Maori, or Pacific Islander). All participants in the analysis received at least 14 days of oral antibiotics for treatment of nonhospitalized respiratory exacerbations.

Overall, 130 children had resolution of symptoms by day 14, and 87 were nonresponders.

In a multivariate analysis, children who were Indigenous or who had new abnormal auscultatory findings were significantly more likely to respond than children in other categories (odds ratios, 3.59 and 3.85, respectively).

Patients with multiple bronchiectatic lobes at the time of diagnosis and those with higher cough scores at the start of treatment were significantly less likely to respond to antibiotics than patients without these features (OR, 0.66 and 0.55, respectively).

The researchers conducted a further analysis to examine the association between Indigenous ethnicity and treatment response. They found no differences in the other response variables of number of affected lobes at diagnosis and cough scores at the start of treatment between Indigenous and non-Indigenous children.

Given the strong response to antibiotics among Indigenous children, the researchers also conducted a mediation analysis. “Respiratory bacterial pathogens were mediated by Indigenous ethnicity and associated with being an antibiotic ‘responder,’ ” they wrote. For new abnormal chest auscultatory findings, both direct and indirect effects on day 14 response to oral antibiotics were mediated by Indigenous ethnicity. However, neither cough scores at the start of treatment nor the number of affected lobes at diagnosis showed a mediation effect from Indigenous ethnicity.

Among the nonresponders, 59 of 87 resolved symptoms with continuing oral antibiotics over the next 2-4 weeks, and 21 improved without antibiotics.

Additionally, the detection of a respiratory virus at the start of an exacerbation was not associated with antibiotic failure at 14 days, the researchers noted.

The findings were limited by several factors including the use of data from randomized trials that were not designed to address the question in the current study, the researchers noted. Other limitations included incomplete clinical data and lack of data on inflammatory indices, potential antibiotic-resistant pathogens in nonresponders, and the follow-up period of only 14 days, they said.

However, the results suggest a role for patient and exacerbation phenotypes in management of bronchiectasis in clinical practice and promoting antimicrobial stewardship, the researchers wrote. “Although there is benefit in treating exacerbations early to avoid treatment failure and subsequent intravenous antibiotics, future research also needs to identify exacerbations that can be managed without antibiotics,” they concluded.

The BEST-1 and BEST-2 studies were supported by the Australian National Health and Medical Research Council and the NHMRC Centre for Research Excellence in Lung Health of Aboriginal and Torres Strait Islander Children. Dr. Goyal had no financial conflicts to disclose.
 

Indigenous children or children with new abnormal auscultatory findings were significantly more likely than children in other categories to respond to oral antibiotics for exacerbations related to bronchiectasis, based on data from more than 200 individuals in New Zealand.

Children and adolescents with bronchiectasis are often treated with antibiotics for respiratory exacerbations, but the effects of antibiotics can vary among individuals, and phenotypic features associated with greater symptom resolution have not been identified, wrote Vikas Goyal, PhD, of the Centre for Children’s Health Research, Brisbane, Australia, and colleagues.

Previous studies have suggested that nearly half of exacerbations in children and adolescents resolve spontaneously after 14 days, and more data are needed to identify which patients are mostly likely to benefit from antibiotics, they noted.

In a study published in the journal Chest, the researchers reviewed secondary data from 217 children and adolescents aged 1-18 years with bronchiectasis enrolled in a pair of randomized, controlled trials comparing oral antibiotics with placebo (known as BEST-1 and BEST-2). The median age of the participants was 6.6 years, 52% were boys, and 41% were Indigenous (defined as Australian First Nations, New Zealand Maori, or Pacific Islander). All participants in the analysis received at least 14 days of oral antibiotics for treatment of nonhospitalized respiratory exacerbations.

Overall, 130 children had resolution of symptoms by day 14, and 87 were nonresponders.

In a multivariate analysis, children who were Indigenous or who had new abnormal auscultatory findings were significantly more likely to respond than children in other categories (odds ratios, 3.59 and 3.85, respectively).

Patients with multiple bronchiectatic lobes at the time of diagnosis and those with higher cough scores at the start of treatment were significantly less likely to respond to antibiotics than patients without these features (OR, 0.66 and 0.55, respectively).

The researchers conducted a further analysis to examine the association between Indigenous ethnicity and treatment response. They found no differences in the other response variables of number of affected lobes at diagnosis and cough scores at the start of treatment between Indigenous and non-Indigenous children.

Given the strong response to antibiotics among Indigenous children, the researchers also conducted a mediation analysis. “Respiratory bacterial pathogens were mediated by Indigenous ethnicity and associated with being an antibiotic ‘responder,’ ” they wrote. For new abnormal chest auscultatory findings, both direct and indirect effects on day 14 response to oral antibiotics were mediated by Indigenous ethnicity. However, neither cough scores at the start of treatment nor the number of affected lobes at diagnosis showed a mediation effect from Indigenous ethnicity.

Among the nonresponders, 59 of 87 resolved symptoms with continuing oral antibiotics over the next 2-4 weeks, and 21 improved without antibiotics.

Additionally, the detection of a respiratory virus at the start of an exacerbation was not associated with antibiotic failure at 14 days, the researchers noted.

The findings were limited by several factors including the use of data from randomized trials that were not designed to address the question in the current study, the researchers noted. Other limitations included incomplete clinical data and lack of data on inflammatory indices, potential antibiotic-resistant pathogens in nonresponders, and the follow-up period of only 14 days, they said.

However, the results suggest a role for patient and exacerbation phenotypes in management of bronchiectasis in clinical practice and promoting antimicrobial stewardship, the researchers wrote. “Although there is benefit in treating exacerbations early to avoid treatment failure and subsequent intravenous antibiotics, future research also needs to identify exacerbations that can be managed without antibiotics,” they concluded.

The BEST-1 and BEST-2 studies were supported by the Australian National Health and Medical Research Council and the NHMRC Centre for Research Excellence in Lung Health of Aboriginal and Torres Strait Islander Children. Dr. Goyal had no financial conflicts to disclose.
 

Use of inhalers with long-acting muscarinic antagonists and long-acting beta-agonists reduced COPD exacerbations and pneumonia hospitalizations compared with inhalers with corticosteroids and long-acting beta-agonists, based on data from more than 30,000 individuals.

Current clinical guidelines for chronic obstructive pulmonary disease (COPD) patients recommend inhalers with long-acting muscarinic antagonists (LAMAs) and long-acting beta-agonists (LABAs) over those with inhaled corticosteroids (ICSs) and LABAs, but data comparing the two formulations have been inconsistent, and concerns about generalizability persist, wrote William B. Feldman, MD, of Brigham and Women’s Hospital, Boston, and colleagues.

In a study published in JAMA Internal Medicine, the researchers reviewed data from a commercial insurance claims database of individuals diagnosed with COPD who filled a new prescription for a LAMA-LABA inhaler or ICS-LABA inhaler between Jan. 1, 2014, and Dec. 31, 2019. Patients with asthma and those younger than 40 years were excluded. The study population included 137,833 individuals with a mean age of 70.2 years; 50.4% were female. Of the 107,004 ICS-LABA users and 30,829 LAMA-LABA users, 30,216 matched pairs were included in a 1:1 propensity score matched study. The primary outcomes were effectiveness, based on the rate of first moderate or severe COPD exacerbation, and safety, based on the rate of first pneumonia hospitalization.

Use of LAMA-LABA inhalers was associated with an 8% reduction in the rate of first moderate or severe COPD exacerbation and a 20% reduction in the rate of first pneumonia hospitalization compared with use of ICS-LABA (hazard ratios 0.92 and 0.80, respectively). The absolute rate reductions with LAMA-LABA inhalers for first moderate or severe COPD exacerbations and for first pneumonia hospitalizations were was 43.0 events per 1,000 person-years and 91.8 events per person-years, respectively.

The overall rates of total moderate to severe COPD and pneumonia hospitalizations were 5% and 17% lower, respectively, among patients who used LAMA-LABA than those treated with ICS-LABA. The results were consistently robust in subgroup and sensitivity analyses, the researchers wrote in their discussion. However, the results must be interpreted cautiously in comparison to other large studies because of the significant differences in the cohorts of patients studied, notably that most patients in the current study had no received previous inhaler therapy.

The study findings were limited by several factors including the relatively short follow-up time and reliance on prescription fills as an indicator of medication use, the researchers noted. Other limitations included notable differences between the LAMA-LABA patients and ICS-LABA patients, such as more severe COPD and less access to respiratory care, they wrote.

Although the current study is not the definitive answer to conflicting results from previous trials, it is the largest know to date to compare LAMA-LABA with ICS-LABA, and the results support LAMA-LABA as the preferred therapy for COPD patients, the researchers concluded.
 

Findings clarify clinical practice guidelines

“This study was required to provide clarity regarding the optimal choice of treatment for COPD given conflicting data from other recent trials,” Suman Pal, MBBS, of the University of New Mexico, Albuquerque, said in an interview.

“The study findings reinforce the benefits of combined LAMA-LABA in improving clinical outcomes in COPD in a real-world setting,” and the data provide further support for choosing LAMA-LABA over ICS-LABA in COPD patients, said Dr. Pal, who was not involved in the study.

However, availability and affordability of LAMA-LABA inhalers may be barriers to expanding their use in clinical practice, he noted.

“Additional research is needed to accurately define which patient populations would benefit most from the therapy and whether patients who have previously been stabilized on ICS-LABA would derive additional benefit from a change in therapy,” Dr. Pal said.

The study was supported by the National Heart, Lung, and Blood Institute and funding from the Commonwealth Fund and Arnold Ventures.

Dr. Feldman disclosed receiving personal fees from Alosa Health and Aetion, serving as an expert witness in litigation against inhaler manufacturers, and receiving an honorarium for a presentation to Blue Cross Blue Shield of Massachusetts unrelated to the current study. Dr. Pal had no financial conflicts to disclose.

Use of inhalers with long-acting muscarinic antagonists and long-acting beta-agonists reduced COPD exacerbations and pneumonia hospitalizations compared with inhalers with corticosteroids and long-acting beta-agonists, based on data from more than 30,000 individuals.

Current clinical guidelines for chronic obstructive pulmonary disease (COPD) patients recommend inhalers with long-acting muscarinic antagonists (LAMAs) and long-acting beta-agonists (LABAs) over those with inhaled corticosteroids (ICSs) and LABAs, but data comparing the two formulations have been inconsistent, and concerns about generalizability persist, wrote William B. Feldman, MD, of Brigham and Women’s Hospital, Boston, and colleagues.

In a study published in JAMA Internal Medicine, the researchers reviewed data from a commercial insurance claims database of individuals diagnosed with COPD who filled a new prescription for a LAMA-LABA inhaler or ICS-LABA inhaler between Jan. 1, 2014, and Dec. 31, 2019. Patients with asthma and those younger than 40 years were excluded. The study population included 137,833 individuals with a mean age of 70.2 years; 50.4% were female. Of the 107,004 ICS-LABA users and 30,829 LAMA-LABA users, 30,216 matched pairs were included in a 1:1 propensity score matched study. The primary outcomes were effectiveness, based on the rate of first moderate or severe COPD exacerbation, and safety, based on the rate of first pneumonia hospitalization.

Use of LAMA-LABA inhalers was associated with an 8% reduction in the rate of first moderate or severe COPD exacerbation and a 20% reduction in the rate of first pneumonia hospitalization compared with use of ICS-LABA (hazard ratios 0.92 and 0.80, respectively). The absolute rate reductions with LAMA-LABA inhalers for first moderate or severe COPD exacerbations and for first pneumonia hospitalizations were was 43.0 events per 1,000 person-years and 91.8 events per person-years, respectively.

The overall rates of total moderate to severe COPD and pneumonia hospitalizations were 5% and 17% lower, respectively, among patients who used LAMA-LABA than those treated with ICS-LABA. The results were consistently robust in subgroup and sensitivity analyses, the researchers wrote in their discussion. However, the results must be interpreted cautiously in comparison to other large studies because of the significant differences in the cohorts of patients studied, notably that most patients in the current study had no received previous inhaler therapy.

The study findings were limited by several factors including the relatively short follow-up time and reliance on prescription fills as an indicator of medication use, the researchers noted. Other limitations included notable differences between the LAMA-LABA patients and ICS-LABA patients, such as more severe COPD and less access to respiratory care, they wrote.

Although the current study is not the definitive answer to conflicting results from previous trials, it is the largest know to date to compare LAMA-LABA with ICS-LABA, and the results support LAMA-LABA as the preferred therapy for COPD patients, the researchers concluded.
 

Findings clarify clinical practice guidelines

“This study was required to provide clarity regarding the optimal choice of treatment for COPD given conflicting data from other recent trials,” Suman Pal, MBBS, of the University of New Mexico, Albuquerque, said in an interview.

“The study findings reinforce the benefits of combined LAMA-LABA in improving clinical outcomes in COPD in a real-world setting,” and the data provide further support for choosing LAMA-LABA over ICS-LABA in COPD patients, said Dr. Pal, who was not involved in the study.

However, availability and affordability of LAMA-LABA inhalers may be barriers to expanding their use in clinical practice, he noted.

“Additional research is needed to accurately define which patient populations would benefit most from the therapy and whether patients who have previously been stabilized on ICS-LABA would derive additional benefit from a change in therapy,” Dr. Pal said.

The study was supported by the National Heart, Lung, and Blood Institute and funding from the Commonwealth Fund and Arnold Ventures.

Dr. Feldman disclosed receiving personal fees from Alosa Health and Aetion, serving as an expert witness in litigation against inhaler manufacturers, and receiving an honorarium for a presentation to Blue Cross Blue Shield of Massachusetts unrelated to the current study. Dr. Pal had no financial conflicts to disclose.

Use of inhalers with long-acting muscarinic antagonists and long-acting beta-agonists reduced COPD exacerbations and pneumonia hospitalizations compared with inhalers with corticosteroids and long-acting beta-agonists, based on data from more than 30,000 individuals.

Current clinical guidelines for chronic obstructive pulmonary disease (COPD) patients recommend inhalers with long-acting muscarinic antagonists (LAMAs) and long-acting beta-agonists (LABAs) over those with inhaled corticosteroids (ICSs) and LABAs, but data comparing the two formulations have been inconsistent, and concerns about generalizability persist, wrote William B. Feldman, MD, of Brigham and Women’s Hospital, Boston, and colleagues.

In a study published in JAMA Internal Medicine, the researchers reviewed data from a commercial insurance claims database of individuals diagnosed with COPD who filled a new prescription for a LAMA-LABA inhaler or ICS-LABA inhaler between Jan. 1, 2014, and Dec. 31, 2019. Patients with asthma and those younger than 40 years were excluded. The study population included 137,833 individuals with a mean age of 70.2 years; 50.4% were female. Of the 107,004 ICS-LABA users and 30,829 LAMA-LABA users, 30,216 matched pairs were included in a 1:1 propensity score matched study. The primary outcomes were effectiveness, based on the rate of first moderate or severe COPD exacerbation, and safety, based on the rate of first pneumonia hospitalization.

Use of LAMA-LABA inhalers was associated with an 8% reduction in the rate of first moderate or severe COPD exacerbation and a 20% reduction in the rate of first pneumonia hospitalization compared with use of ICS-LABA (hazard ratios 0.92 and 0.80, respectively). The absolute rate reductions with LAMA-LABA inhalers for first moderate or severe COPD exacerbations and for first pneumonia hospitalizations were was 43.0 events per 1,000 person-years and 91.8 events per person-years, respectively.

The overall rates of total moderate to severe COPD and pneumonia hospitalizations were 5% and 17% lower, respectively, among patients who used LAMA-LABA than those treated with ICS-LABA. The results were consistently robust in subgroup and sensitivity analyses, the researchers wrote in their discussion. However, the results must be interpreted cautiously in comparison to other large studies because of the significant differences in the cohorts of patients studied, notably that most patients in the current study had no received previous inhaler therapy.

The study findings were limited by several factors including the relatively short follow-up time and reliance on prescription fills as an indicator of medication use, the researchers noted. Other limitations included notable differences between the LAMA-LABA patients and ICS-LABA patients, such as more severe COPD and less access to respiratory care, they wrote.

Although the current study is not the definitive answer to conflicting results from previous trials, it is the largest know to date to compare LAMA-LABA with ICS-LABA, and the results support LAMA-LABA as the preferred therapy for COPD patients, the researchers concluded.
 

Findings clarify clinical practice guidelines

“This study was required to provide clarity regarding the optimal choice of treatment for COPD given conflicting data from other recent trials,” Suman Pal, MBBS, of the University of New Mexico, Albuquerque, said in an interview.

“The study findings reinforce the benefits of combined LAMA-LABA in improving clinical outcomes in COPD in a real-world setting,” and the data provide further support for choosing LAMA-LABA over ICS-LABA in COPD patients, said Dr. Pal, who was not involved in the study.

However, availability and affordability of LAMA-LABA inhalers may be barriers to expanding their use in clinical practice, he noted.

“Additional research is needed to accurately define which patient populations would benefit most from the therapy and whether patients who have previously been stabilized on ICS-LABA would derive additional benefit from a change in therapy,” Dr. Pal said.

The study was supported by the National Heart, Lung, and Blood Institute and funding from the Commonwealth Fund and Arnold Ventures.

Dr. Feldman disclosed receiving personal fees from Alosa Health and Aetion, serving as an expert witness in litigation against inhaler manufacturers, and receiving an honorarium for a presentation to Blue Cross Blue Shield of Massachusetts unrelated to the current study. Dr. Pal had no financial conflicts to disclose.

Among adults with type 2 diabetes, the presence of preserved ratio impaired spirometry (PRISm) was significantly associated with increased risk of mortality and both macro- and microvascular complications, as well as increased mortality, based on data from more than 20,000 individuals.

PRISm occurs in approximately 10% of the general population and has been identified as a predictor of adverse health outcomes including cardiorespiratory morbidity and mortality, Guochen Li, MD, of the Medical College of Soochow University, Suzhou, China, and colleagues wrote.

“A growing number of studies have demonstrated that impaired lung function and type 2 diabetes could trigger shared pathophysiological injuries, such as microangiopathy and chronic inflammation,” they said, but the potential role of PRISm as an early predictor of adverse outcomes in patients with type 2 diabetes has not been fully examined.

In a study published in the journal Chest, the researchers reviewed data from 20,047 individuals with type 2 diabetes in the UK Biobank, a population-based cohort of adults aged 37-73 years recruited between 2006 and 2010.

The main exposure was lung function based on spirometry. PRISm was defined as predicted forced expiratory volume per second (FEV1) less than 80%, with an FEV1/ forced vital capacity (FVC) ratio of at least 0.70. Individuals with normal spirometry (defined as predicted FEV1 ≥ 80% with an FEV1/FVC ratio ≥ 0.70) served as controls.

The primary outcomes were major complications of type 2 diabetes including macrovascular events (myocardial infarction, unstable angina, coronary heart disease [CHD], ischemic stroke, and any type of stroke), microvascular events (diabetic retinopathy and diabetic kidney disease) and mortality (all-cause, cardiovascular, and respiratory).

Overall, 16.9% of study participants (3385 patients) had obstructive spirometry and 22.6% (4521 patients) had PRISm. Compared with individuals with normal spirometry, those with PRISm were more likely to be current smokers, obese, and living in economically disadvantaged areas. Individuals with PRISm also were significantly more likely to be long-term patients with diabetes who were taking glucose-lowering or lipid-lowering drugs (P < .001 for all).

The median follow-up for each of the type 2 diabetes complications and mortality was approximately 12 years. Over this time, 5.0% of patients developed incident MI, 1.3% developed unstable angina, 15.6% had CHD, 3.5% had an ischemic stroke, and 4.7% had any type of stroke. As for microvascular events, 7.8% developed diabetic retinopathy and 6.7% developed diabetic kidney disease. A total of 2588 patients died during the study period (15.1%), including 544 from cardiovascular disease and 319 from respiratory disease.

PRISm was significantly associated with increased risk of each of the complications and mortality types. These associations persisted after adjusting for lifestyle and other factors. The fully adjusted hazard ratios for PRISm versus normal spirometry were 1.23 for MI, 1.23 for unstable angina, 1.21 for CHD, 1.38 for ischemic stroke, 1.41 for any type of stroke, 1.31 for diabetic retinopathy, and 1.38 for diabetic kidney disease. Adjusted HRs for mortality were 1.34, 1.60, and 1.56 for all-cause, cardiovascular, and respiratory mortality, respectively.

The researchers also found that adding PRISm to an office-based risk score significantly improved the risk classification and predictive power for type 2 diabetes complications with the exception of unstable angina and mortality. They found little evidence for an association with sex, smoking, or PRISm duration and any mortality types. However, in subgroup analyses by age, sex, and duration of diabetes, PRISm remained associated with increased risk of macrovascular and microvascular complications, as well as mortality.

Potential mechanisms for the association between PRISm and diabetes complications include the role of insulin resistance in the exacerbation of lung damage in patients with type 2 diabetes, the increased rate of supplemental oxygen use among individuals with PRISm, and the increased prevalence of pulmonary artery enlargement in the PRISm subjects, the researchers wrote.

The findings were limited by several factors including the prospective design, the homogeneous population of individuals primarily of British or Irish ancestry, and the exclusion of diabetic neuropathy from the analysis, the researchers noted.

However, the results were strengthened by the large cohort, use of professional spirometry, and relatively long follow-up. “The findings underscore the relevance of PRISm for prognostic classification in type 2 diabetes and its potential for optimizing prevention strategies in this condition,” they concluded.

The study was supported by the National Natural Science Foundation of China, Natural Science Foundation of Jiangsu Province, and the Priority Academic Program Development of Jiangsu Higher Education Institutions. The researchers reported no relevant financial relationships.

A version of this article first appeared on Medscape.com

Among adults with type 2 diabetes, the presence of preserved ratio impaired spirometry (PRISm) was significantly associated with increased risk of mortality and both macro- and microvascular complications, as well as increased mortality, based on data from more than 20,000 individuals.

PRISm occurs in approximately 10% of the general population and has been identified as a predictor of adverse health outcomes including cardiorespiratory morbidity and mortality, Guochen Li, MD, of the Medical College of Soochow University, Suzhou, China, and colleagues wrote.

“A growing number of studies have demonstrated that impaired lung function and type 2 diabetes could trigger shared pathophysiological injuries, such as microangiopathy and chronic inflammation,” they said, but the potential role of PRISm as an early predictor of adverse outcomes in patients with type 2 diabetes has not been fully examined.

In a study published in the journal Chest, the researchers reviewed data from 20,047 individuals with type 2 diabetes in the UK Biobank, a population-based cohort of adults aged 37-73 years recruited between 2006 and 2010.

The main exposure was lung function based on spirometry. PRISm was defined as predicted forced expiratory volume per second (FEV1) less than 80%, with an FEV1/ forced vital capacity (FVC) ratio of at least 0.70. Individuals with normal spirometry (defined as predicted FEV1 ≥ 80% with an FEV1/FVC ratio ≥ 0.70) served as controls.

The primary outcomes were major complications of type 2 diabetes including macrovascular events (myocardial infarction, unstable angina, coronary heart disease [CHD], ischemic stroke, and any type of stroke), microvascular events (diabetic retinopathy and diabetic kidney disease) and mortality (all-cause, cardiovascular, and respiratory).

Overall, 16.9% of study participants (3385 patients) had obstructive spirometry and 22.6% (4521 patients) had PRISm. Compared with individuals with normal spirometry, those with PRISm were more likely to be current smokers, obese, and living in economically disadvantaged areas. Individuals with PRISm also were significantly more likely to be long-term patients with diabetes who were taking glucose-lowering or lipid-lowering drugs (P < .001 for all).

The median follow-up for each of the type 2 diabetes complications and mortality was approximately 12 years. Over this time, 5.0% of patients developed incident MI, 1.3% developed unstable angina, 15.6% had CHD, 3.5% had an ischemic stroke, and 4.7% had any type of stroke. As for microvascular events, 7.8% developed diabetic retinopathy and 6.7% developed diabetic kidney disease. A total of 2588 patients died during the study period (15.1%), including 544 from cardiovascular disease and 319 from respiratory disease.

PRISm was significantly associated with increased risk of each of the complications and mortality types. These associations persisted after adjusting for lifestyle and other factors. The fully adjusted hazard ratios for PRISm versus normal spirometry were 1.23 for MI, 1.23 for unstable angina, 1.21 for CHD, 1.38 for ischemic stroke, 1.41 for any type of stroke, 1.31 for diabetic retinopathy, and 1.38 for diabetic kidney disease. Adjusted HRs for mortality were 1.34, 1.60, and 1.56 for all-cause, cardiovascular, and respiratory mortality, respectively.

The researchers also found that adding PRISm to an office-based risk score significantly improved the risk classification and predictive power for type 2 diabetes complications with the exception of unstable angina and mortality. They found little evidence for an association with sex, smoking, or PRISm duration and any mortality types. However, in subgroup analyses by age, sex, and duration of diabetes, PRISm remained associated with increased risk of macrovascular and microvascular complications, as well as mortality.

Potential mechanisms for the association between PRISm and diabetes complications include the role of insulin resistance in the exacerbation of lung damage in patients with type 2 diabetes, the increased rate of supplemental oxygen use among individuals with PRISm, and the increased prevalence of pulmonary artery enlargement in the PRISm subjects, the researchers wrote.

The findings were limited by several factors including the prospective design, the homogeneous population of individuals primarily of British or Irish ancestry, and the exclusion of diabetic neuropathy from the analysis, the researchers noted.

However, the results were strengthened by the large cohort, use of professional spirometry, and relatively long follow-up. “The findings underscore the relevance of PRISm for prognostic classification in type 2 diabetes and its potential for optimizing prevention strategies in this condition,” they concluded.

The study was supported by the National Natural Science Foundation of China, Natural Science Foundation of Jiangsu Province, and the Priority Academic Program Development of Jiangsu Higher Education Institutions. The researchers reported no relevant financial relationships.

A version of this article first appeared on Medscape.com

Among adults with type 2 diabetes, the presence of preserved ratio impaired spirometry (PRISm) was significantly associated with increased risk of mortality and both macro- and microvascular complications, as well as increased mortality, based on data from more than 20,000 individuals.

PRISm occurs in approximately 10% of the general population and has been identified as a predictor of adverse health outcomes including cardiorespiratory morbidity and mortality, Guochen Li, MD, of the Medical College of Soochow University, Suzhou, China, and colleagues wrote.

“A growing number of studies have demonstrated that impaired lung function and type 2 diabetes could trigger shared pathophysiological injuries, such as microangiopathy and chronic inflammation,” they said, but the potential role of PRISm as an early predictor of adverse outcomes in patients with type 2 diabetes has not been fully examined.

In a study published in the journal Chest, the researchers reviewed data from 20,047 individuals with type 2 diabetes in the UK Biobank, a population-based cohort of adults aged 37-73 years recruited between 2006 and 2010.

The main exposure was lung function based on spirometry. PRISm was defined as predicted forced expiratory volume per second (FEV1) less than 80%, with an FEV1/ forced vital capacity (FVC) ratio of at least 0.70. Individuals with normal spirometry (defined as predicted FEV1 ≥ 80% with an FEV1/FVC ratio ≥ 0.70) served as controls.

The primary outcomes were major complications of type 2 diabetes including macrovascular events (myocardial infarction, unstable angina, coronary heart disease [CHD], ischemic stroke, and any type of stroke), microvascular events (diabetic retinopathy and diabetic kidney disease) and mortality (all-cause, cardiovascular, and respiratory).

Overall, 16.9% of study participants (3385 patients) had obstructive spirometry and 22.6% (4521 patients) had PRISm. Compared with individuals with normal spirometry, those with PRISm were more likely to be current smokers, obese, and living in economically disadvantaged areas. Individuals with PRISm also were significantly more likely to be long-term patients with diabetes who were taking glucose-lowering or lipid-lowering drugs (P < .001 for all).

The median follow-up for each of the type 2 diabetes complications and mortality was approximately 12 years. Over this time, 5.0% of patients developed incident MI, 1.3% developed unstable angina, 15.6% had CHD, 3.5% had an ischemic stroke, and 4.7% had any type of stroke. As for microvascular events, 7.8% developed diabetic retinopathy and 6.7% developed diabetic kidney disease. A total of 2588 patients died during the study period (15.1%), including 544 from cardiovascular disease and 319 from respiratory disease.

PRISm was significantly associated with increased risk of each of the complications and mortality types. These associations persisted after adjusting for lifestyle and other factors. The fully adjusted hazard ratios for PRISm versus normal spirometry were 1.23 for MI, 1.23 for unstable angina, 1.21 for CHD, 1.38 for ischemic stroke, 1.41 for any type of stroke, 1.31 for diabetic retinopathy, and 1.38 for diabetic kidney disease. Adjusted HRs for mortality were 1.34, 1.60, and 1.56 for all-cause, cardiovascular, and respiratory mortality, respectively.

The researchers also found that adding PRISm to an office-based risk score significantly improved the risk classification and predictive power for type 2 diabetes complications with the exception of unstable angina and mortality. They found little evidence for an association with sex, smoking, or PRISm duration and any mortality types. However, in subgroup analyses by age, sex, and duration of diabetes, PRISm remained associated with increased risk of macrovascular and microvascular complications, as well as mortality.

Potential mechanisms for the association between PRISm and diabetes complications include the role of insulin resistance in the exacerbation of lung damage in patients with type 2 diabetes, the increased rate of supplemental oxygen use among individuals with PRISm, and the increased prevalence of pulmonary artery enlargement in the PRISm subjects, the researchers wrote.

The findings were limited by several factors including the prospective design, the homogeneous population of individuals primarily of British or Irish ancestry, and the exclusion of diabetic neuropathy from the analysis, the researchers noted.

However, the results were strengthened by the large cohort, use of professional spirometry, and relatively long follow-up. “The findings underscore the relevance of PRISm for prognostic classification in type 2 diabetes and its potential for optimizing prevention strategies in this condition,” they concluded.

The study was supported by the National Natural Science Foundation of China, Natural Science Foundation of Jiangsu Province, and the Priority Academic Program Development of Jiangsu Higher Education Institutions. The researchers reported no relevant financial relationships.

A version of this article first appeared on Medscape.com

Younger colorectal cancer patients with metastatic disease had distinct patterns of adverse events and worse survival than older patients with the same type of cancer, results of a new study indicate.

The incidence of metastatic colorectal cancer (mCRC) among adults younger than 50 years has been increasing, and although younger patients are treated with aggressive regimens similarly to older patients, outcomes data, including incidence of toxic effects, across age groups are limited, wrote Lingbin Meng, MD, of H. Lee Moffitt Cancer Center & Research Institute, Tampa, Fla., and colleagues, in their paper on the new research.

“Studies on the age-related disparity ... provided mixed findings,” said corresponding author Hao Xie, MD, of the Mayo Clinic in Rochester, Minn., in an interview.

According to the paper, published in JAMA Network Open, the researchers sought to evaluate the association between age and mCRC treatment-related adverse events and survival.

The study population included 1,223 mCRC patients who underwent first-line treatment with fluorouracil and oxaliplatin therapy in three clinical trials. An additional 736 patients with mCRC from the Moffitt Cancer Center were used to assess genomic alterations and serve as an external validation cohort.
 

Methods and results

Patients were divided into three age groups: younger than 50 years, 50-65 years, and 65 years and older. Early onset was defined as younger than 50 years. Approximately 58% of the study population was male.

The primary outcomes were treatment-related adverse events and survival rates. Overall survival (OS) and progression-free survival (PFS) were was significantly shorter in the early-onset group, compared with the 50-65 years group (hazard ratios, 1.48 and 1.46, respectively, P < .001 for both) in a multivariate analysis. The shorter OS in the early-onset group was confirmed in the validation cohort.

The early-onset patients had significantly higher incidence of nausea and vomiting, severe abdominal pain, severe anemia, and severe rash, compared with patients in both the 50- to 65-year-old group and the older than 65 years group. In addition, abdominal pain and severe liver toxicity effects were associated with shorter survival in the early-onset patients.

Genomic data from the Moffitt cohort showed a higher prevalence of CTNNB1 mutation among patients younger than 50 years, compared with the 50- to 65-year-old group and the older than 65 years group (6.6%, 3.1%, and 2.3%, respectively; P = .047), as well as ERBB2 amplification (5.1%, 0.6%, and 2.3%, respectively; P = .005), and CREBBP mutation (3.1%, 0.9%, and 0.5%; P = .05), although the prevalence of BRAF mutation was significantly lower in the younger patients, compared with patients in the older groups (7.7%, 8.5%, and 16.7%, respectively; P = .002).

These data suggest that distinct genomic profiles may play a role in the worse outcomes for patients with early-onset mCRC, the researchers said.

The findings were limited by several factors, including the timing of the trials prior to the use of biologics as standard first-line therapy, the researchers noted. Other limitations include a lack of data on treatment adherence and intensity and the location and number of metastases, and potential limited generalizability to other populations given that the majority of the participants were white, they said.
 

Data support individualized treatment

“We were surprised to find that patients with early-onset metastatic colorectal cancer had worse survival outcome, compared to older patients with metastatic colorectal cancer,” Dr. Xie said, in an interview. “On the other hand, we were not surprised to find unique adverse-event patterns in patients with early-onset metastatic colorectal cancer.”

For clinicians, “The take home message is that we should adopt individualized management approaches [regarding] cancer-direct treatments and treatment-related side effects in patients with early-onset metastatic colorectal cancer,” said Dr. Xie. However, more research is needed in the form of prospective and interventional studies to address treatment-related side effects and to develop novel and personalized therapeutics for patients with early-onset metastatic colorectal cancer, Dr. Xie added.
 

Early-onset cancer concerns persist

“The increasing shift in early colon cancers demands better understanding, in particular as we attempt a more patient-focused approach to treatments,” said David A. Johnson, MD, chief of gastroenterology at Eastern Virginia Medical School, Norfolk, in an interview. “Clearly, genetic amplifications and oncogene mutations play an essential role in tumorigenesis and tumor progression, but data on specifics are needed.”

With regard to the current study, “it makes sense that the pathways to CRC development and progression at least in part play a role in age-related cancers,” said Dr. Johnson, who was not involved in the study.

The clinical implications from the study are that early-onset CRC “can be aggressive and progressive,” Dr. Johnson said. “Younger patients need to recognize the earlier ages for beginning CRC screening, age 45 years for those at average risk, and certainly report any new sign or symptom to their care provider, in particular blood in the stool.”

As for additional research, “The oncogenetic markers will be helpful in guiding treatment approaches to be more individual specific, rather than just disease focused,” Dr. Johnson said. “The role of the gut microbiome will need evaluation as it relates to these oncogenetic factors,” he noted. Considerations include not only the potential influence of the gut microbiome on the expression of these factors, but also the impact of the gut microbiome on the chemotherapeutic response, as has been evident with checkpoint inhibitors, he added.

The study was supported by a Moffitt Support Grant to Dr. Xie and the University of South Florida Continuing Medical Education Funding. The researchers had no financial conflicts to disclose. Dr. Johnson had no relevant financial conflicts to disclose.

Younger colorectal cancer patients with metastatic disease had distinct patterns of adverse events and worse survival than older patients with the same type of cancer, results of a new study indicate.

The incidence of metastatic colorectal cancer (mCRC) among adults younger than 50 years has been increasing, and although younger patients are treated with aggressive regimens similarly to older patients, outcomes data, including incidence of toxic effects, across age groups are limited, wrote Lingbin Meng, MD, of H. Lee Moffitt Cancer Center & Research Institute, Tampa, Fla., and colleagues, in their paper on the new research.

“Studies on the age-related disparity ... provided mixed findings,” said corresponding author Hao Xie, MD, of the Mayo Clinic in Rochester, Minn., in an interview.

According to the paper, published in JAMA Network Open, the researchers sought to evaluate the association between age and mCRC treatment-related adverse events and survival.

The study population included 1,223 mCRC patients who underwent first-line treatment with fluorouracil and oxaliplatin therapy in three clinical trials. An additional 736 patients with mCRC from the Moffitt Cancer Center were used to assess genomic alterations and serve as an external validation cohort.
 

Methods and results

Patients were divided into three age groups: younger than 50 years, 50-65 years, and 65 years and older. Early onset was defined as younger than 50 years. Approximately 58% of the study population was male.

The primary outcomes were treatment-related adverse events and survival rates. Overall survival (OS) and progression-free survival (PFS) were was significantly shorter in the early-onset group, compared with the 50-65 years group (hazard ratios, 1.48 and 1.46, respectively, P < .001 for both) in a multivariate analysis. The shorter OS in the early-onset group was confirmed in the validation cohort.

The early-onset patients had significantly higher incidence of nausea and vomiting, severe abdominal pain, severe anemia, and severe rash, compared with patients in both the 50- to 65-year-old group and the older than 65 years group. In addition, abdominal pain and severe liver toxicity effects were associated with shorter survival in the early-onset patients.

Genomic data from the Moffitt cohort showed a higher prevalence of CTNNB1 mutation among patients younger than 50 years, compared with the 50- to 65-year-old group and the older than 65 years group (6.6%, 3.1%, and 2.3%, respectively; P = .047), as well as ERBB2 amplification (5.1%, 0.6%, and 2.3%, respectively; P = .005), and CREBBP mutation (3.1%, 0.9%, and 0.5%; P = .05), although the prevalence of BRAF mutation was significantly lower in the younger patients, compared with patients in the older groups (7.7%, 8.5%, and 16.7%, respectively; P = .002).

These data suggest that distinct genomic profiles may play a role in the worse outcomes for patients with early-onset mCRC, the researchers said.

The findings were limited by several factors, including the timing of the trials prior to the use of biologics as standard first-line therapy, the researchers noted. Other limitations include a lack of data on treatment adherence and intensity and the location and number of metastases, and potential limited generalizability to other populations given that the majority of the participants were white, they said.
 

Data support individualized treatment

“We were surprised to find that patients with early-onset metastatic colorectal cancer had worse survival outcome, compared to older patients with metastatic colorectal cancer,” Dr. Xie said, in an interview. “On the other hand, we were not surprised to find unique adverse-event patterns in patients with early-onset metastatic colorectal cancer.”

For clinicians, “The take home message is that we should adopt individualized management approaches [regarding] cancer-direct treatments and treatment-related side effects in patients with early-onset metastatic colorectal cancer,” said Dr. Xie. However, more research is needed in the form of prospective and interventional studies to address treatment-related side effects and to develop novel and personalized therapeutics for patients with early-onset metastatic colorectal cancer, Dr. Xie added.
 

Early-onset cancer concerns persist

“The increasing shift in early colon cancers demands better understanding, in particular as we attempt a more patient-focused approach to treatments,” said David A. Johnson, MD, chief of gastroenterology at Eastern Virginia Medical School, Norfolk, in an interview. “Clearly, genetic amplifications and oncogene mutations play an essential role in tumorigenesis and tumor progression, but data on specifics are needed.”

With regard to the current study, “it makes sense that the pathways to CRC development and progression at least in part play a role in age-related cancers,” said Dr. Johnson, who was not involved in the study.

The clinical implications from the study are that early-onset CRC “can be aggressive and progressive,” Dr. Johnson said. “Younger patients need to recognize the earlier ages for beginning CRC screening, age 45 years for those at average risk, and certainly report any new sign or symptom to their care provider, in particular blood in the stool.”

As for additional research, “The oncogenetic markers will be helpful in guiding treatment approaches to be more individual specific, rather than just disease focused,” Dr. Johnson said. “The role of the gut microbiome will need evaluation as it relates to these oncogenetic factors,” he noted. Considerations include not only the potential influence of the gut microbiome on the expression of these factors, but also the impact of the gut microbiome on the chemotherapeutic response, as has been evident with checkpoint inhibitors, he added.

The study was supported by a Moffitt Support Grant to Dr. Xie and the University of South Florida Continuing Medical Education Funding. The researchers had no financial conflicts to disclose. Dr. Johnson had no relevant financial conflicts to disclose.

Younger colorectal cancer patients with metastatic disease had distinct patterns of adverse events and worse survival than older patients with the same type of cancer, results of a new study indicate.

The incidence of metastatic colorectal cancer (mCRC) among adults younger than 50 years has been increasing, and although younger patients are treated with aggressive regimens similarly to older patients, outcomes data, including incidence of toxic effects, across age groups are limited, wrote Lingbin Meng, MD, of H. Lee Moffitt Cancer Center & Research Institute, Tampa, Fla., and colleagues, in their paper on the new research.

“Studies on the age-related disparity ... provided mixed findings,” said corresponding author Hao Xie, MD, of the Mayo Clinic in Rochester, Minn., in an interview.

According to the paper, published in JAMA Network Open, the researchers sought to evaluate the association between age and mCRC treatment-related adverse events and survival.

The study population included 1,223 mCRC patients who underwent first-line treatment with fluorouracil and oxaliplatin therapy in three clinical trials. An additional 736 patients with mCRC from the Moffitt Cancer Center were used to assess genomic alterations and serve as an external validation cohort.
 

Methods and results

Patients were divided into three age groups: younger than 50 years, 50-65 years, and 65 years and older. Early onset was defined as younger than 50 years. Approximately 58% of the study population was male.

The primary outcomes were treatment-related adverse events and survival rates. Overall survival (OS) and progression-free survival (PFS) were was significantly shorter in the early-onset group, compared with the 50-65 years group (hazard ratios, 1.48 and 1.46, respectively, P < .001 for both) in a multivariate analysis. The shorter OS in the early-onset group was confirmed in the validation cohort.

The early-onset patients had significantly higher incidence of nausea and vomiting, severe abdominal pain, severe anemia, and severe rash, compared with patients in both the 50- to 65-year-old group and the older than 65 years group. In addition, abdominal pain and severe liver toxicity effects were associated with shorter survival in the early-onset patients.

Genomic data from the Moffitt cohort showed a higher prevalence of CTNNB1 mutation among patients younger than 50 years, compared with the 50- to 65-year-old group and the older than 65 years group (6.6%, 3.1%, and 2.3%, respectively; P = .047), as well as ERBB2 amplification (5.1%, 0.6%, and 2.3%, respectively; P = .005), and CREBBP mutation (3.1%, 0.9%, and 0.5%; P = .05), although the prevalence of BRAF mutation was significantly lower in the younger patients, compared with patients in the older groups (7.7%, 8.5%, and 16.7%, respectively; P = .002).

These data suggest that distinct genomic profiles may play a role in the worse outcomes for patients with early-onset mCRC, the researchers said.

The findings were limited by several factors, including the timing of the trials prior to the use of biologics as standard first-line therapy, the researchers noted. Other limitations include a lack of data on treatment adherence and intensity and the location and number of metastases, and potential limited generalizability to other populations given that the majority of the participants were white, they said.
 

Data support individualized treatment

“We were surprised to find that patients with early-onset metastatic colorectal cancer had worse survival outcome, compared to older patients with metastatic colorectal cancer,” Dr. Xie said, in an interview. “On the other hand, we were not surprised to find unique adverse-event patterns in patients with early-onset metastatic colorectal cancer.”

For clinicians, “The take home message is that we should adopt individualized management approaches [regarding] cancer-direct treatments and treatment-related side effects in patients with early-onset metastatic colorectal cancer,” said Dr. Xie. However, more research is needed in the form of prospective and interventional studies to address treatment-related side effects and to develop novel and personalized therapeutics for patients with early-onset metastatic colorectal cancer, Dr. Xie added.
 

Early-onset cancer concerns persist

“The increasing shift in early colon cancers demands better understanding, in particular as we attempt a more patient-focused approach to treatments,” said David A. Johnson, MD, chief of gastroenterology at Eastern Virginia Medical School, Norfolk, in an interview. “Clearly, genetic amplifications and oncogene mutations play an essential role in tumorigenesis and tumor progression, but data on specifics are needed.”

With regard to the current study, “it makes sense that the pathways to CRC development and progression at least in part play a role in age-related cancers,” said Dr. Johnson, who was not involved in the study.

The clinical implications from the study are that early-onset CRC “can be aggressive and progressive,” Dr. Johnson said. “Younger patients need to recognize the earlier ages for beginning CRC screening, age 45 years for those at average risk, and certainly report any new sign or symptom to their care provider, in particular blood in the stool.”

As for additional research, “The oncogenetic markers will be helpful in guiding treatment approaches to be more individual specific, rather than just disease focused,” Dr. Johnson said. “The role of the gut microbiome will need evaluation as it relates to these oncogenetic factors,” he noted. Considerations include not only the potential influence of the gut microbiome on the expression of these factors, but also the impact of the gut microbiome on the chemotherapeutic response, as has been evident with checkpoint inhibitors, he added.

The study was supported by a Moffitt Support Grant to Dr. Xie and the University of South Florida Continuing Medical Education Funding. The researchers had no financial conflicts to disclose. Dr. Johnson had no relevant financial conflicts to disclose.

Vaginal microbiota transfer may facilitate normal neurodevelopment for infants born via cesarean delivery, based on data from a new pilot study of 68 infants.

Previous studies have shown that gut microbiota in infancy could affect neurodevelopment, and infants delivered by cesarean are not exposed to potentially helpful microbes acquired by infants during vaginal delivery, wrote Lepeng Zhou, MD, of Southern Medical University, Guangdong, China, and colleagues.

“Infants delivered by C-section start life with very different bacteria than those born vaginally,” corresponding author Jose Clemente, PhD, of Icahn School of Medicine at Mount Sinai, New York, said in an interview. “Because this is the first time the newborn is exposed to microbes, we and others have hypothesized for some time that this ‘first encounter’ might be significant to shape the development of the baby,” he said.

“A few years ago, we demonstrated that it is possible to change the microbiome of C-section–delivered infants using an intervention that makes their microbiome more similar to that of a vaginally-delivered infant,” Dr. Clemente told this news organization. “In this study just published, we show that this procedure not only changes the microbiome of C-section infants, but it also modifies a health outcome (in this case, neurodevelopment). This is highly significant because it opens the way to reduce the risk that C-section infants have for certain conditions through a very simple microbial intervention,” he said.
 

‘Significantly higher’ ASQ-3 scores

In the current study, published in Cell Host & Microbe, the researchers examined the impact of vaginal microbiota transfer (VMT) on the neurodevelopment of cesarean-delivered infants. They randomized 35 women scheduled for cesarean delivery with a single infant to VMT and 41 to a control intervention of saline gauze for their infants immediately after delivery.

The primary outcome of infant neurodevelopment was assessed using the Ages and Stages Questionnaire (ASQ-3) score at 6 months. The researchers also collected fecal samples and assessed safety outcomes for the infants at 3, 7, 30, and 42 days after birth. The final analysis comprised 32 infants in the VMT group and 36 in the control group. The mean age of the mothers was 32 years; the mean gestational age of the infants was 39 weeks, but the difference was significant and slightly less in the VMT group compared with the controls (38.38 weeks vs. 39.13 weeks, P = .007). A group of 33 vaginally-delivered infants (VD) underwent ASQ-3 testing to serve as a reference group.

At 6 months, ASQ-3 scores were significantly higher (10.09%, P = .014) with VMT compared with controls, and the difference remained significant after adjustment for multiple factors including gestational age.

ASQ-3 total scores at 6 months were not significantly different between the VMT group and the VD reference group (mean difference of 8.84 VMT to VD, P = .346); scores between these groups also were similar at 3 months (mean difference of –1.48 VMT to VD, P = .900) and no significant differences appeared in ASQ-3 subdomains between these groups at either time period.

An examination of gut metabolites in stool showed significant differences in fecal metabolites and metabolic function, signs of gut microbiota maturation, the researchers noted.

“Interestingly, all the genera and metabolites that exhibited positive correlations with neurodevelopmental scores were upregulated in the VMT group, whereas the only negative correlation of Klebsiella was downregulated, indicating that VMT may impact neurodevelopment through the modulation of specific gut microbial genera and metabolites,” the researchers wrote.

No serious adverse events occurred in either group during the study period. Nine adverse events were reported; 4 in the VMT group and 5 in the control group. The most common AEs were mild skin disorders, including papules, pustules, and erythema.

The findings were limited by several factors including the potential for transfer not only of vaginal microbiota, but also vaginal metabolites, mycobiome, and virome, which blurs the potential mechanism of VMT, the researchers noted. Other limitations were the relatively short study period, small sample size, and cervical HPV screening within the past 5 years, not during pregnancy, they wrote.

However, the results suggest that VMT is safe, and may help improve the fecal microbiome in cesarean-delivered infants, and the long-term effects merit further studies in larger populations, they concluded.
 

Limitations and outlook

Dr. Clemente said in an interview that the researchers were “hopeful that the study would demonstrate a health benefit, as it does with some limitations.” The current study findings confirm some previous results showing that modification of the microbiomes of C-section infants is possible through a transfer of maternal vaginal microbes, he said.

“There is also an important aspect that was confirmed here: The lack of serious adverse events associated with the procedure, and the fact that transferring vaginal microbes did not increase the risk of adverse events compared to the control group or to vaginally-delivered infants. This is fundamental to establish that using rigorous exclusion criteria we can perform this procedure safely for infants and mothers,” he added.

“We are at very early stages yet to talk about clinical implications,” said Dr. Clemente. “This is one of the first studies to demonstrate a benefit to the transfer of microbes from mothers to infants, and as such it opens the way for future trials that confirm these findings. The clinical application is still in the future, but this is an important first step towards that goal.”

Interest in restoring gut microbiota to potentially benefit infants persists, but a recent study published in Frontiers and Cellular and Infection Microbiology contradicted the potential association between maternal vaginal microbiome and an infant’s gut microbiome based on an analysis of infant stool.

“There are many reasons why different studies might reach different conclusions: The experimental procedures, the analytical methods, the cohort under study,” Dr. Clemente said when asked to comment on the Frontiers study. “Further studies are needed to establish whether this procedure is equally effective under all conditions and whether health benefits are generalizable or specific to particular populations.”

Several research gaps remain, Dr. Clemente said. “First, neurodevelopment was measured through a questionnaire that captures various aspects such as communication, motor skills, or problem solving. While this is a standard way to establish that an infant is in the correct neurodevelopmental pathway, it is not a ‘hard’ measure of cellular or biochemical processes being impacted by the intervention. Some of our results suggest that there is a change in the metabolome of this infants, particularly an enrichment in GABA, a neurotransmitter, but the exact mechanisms by which the intervention is resulting in a health benefit still remains to be explored,” he said.

“We have an ongoing study here at Mount Sinai to test whether this microbial intervention can be effective in lowering the risk of developing food allergies in newborns who are at high risk, so that is another important future question: What other conditions could benefit from this approach,” said Dr. Clemente.

A third research goal, he added, is “determining what microbes precisely are responsible for the health benefits; this study uses a full microbial community to colonize infants. We show that this is effective and, importantly, that there were no significant adverse events in the treated infants,” he noted. “However, identifying what specific microbes are beneficial would further lower the risk of any potential side effects, while facilitating the development of drugs based on defined microbial consortia,” he said.
 

Safety and efficacy support further studies

“It is widely accepted that the gut microbiome of neonates varies based on mode of delivery,” Anna K. Knight, PhD, assistant professor of gynecology and obstetrics at Emory University, Atlanta, said in an interview.

“C-sections have been associated with increased risk of asthma and metabolic disease, and have been associated with differences in the development of the immune system,” said Dr. Knight, who was not involved in the study. “There have been small pilot studies examining the use of vaginal microbiome transplants to shift the gut microbiome of neonates born by C-section to be more like the gut microbiome of neonates born via vaginal delivery, but the safety and efficacy of this treatment has not been well established. This study examines both, while also evaluating potential changes in the metabolome and neurodevelopmental trajectories.”

The current study confirmed the impact of the neonatal gut microbe on neurodevelopmental outcomes during a sensitive period, said Dr. Knight. “The fact that these differences persisted at 6 months suggests that even if the microbiome composition between vaginally-delivered and preterm infants converged at 1-2 years old, there may be lasting impacts of mode of delivery,” she said.

“The results of this study suggest that vaginal microbiome transplant may be a safe and effective way to mitigate the negative impacts of C-section delivery on the neonatal gut microbiome, and may be protective for neurodevelopment,” she added.

Regarding the Frontiers in Medicine study, Dr. Knight noted that it examined a very different population, with Zhou and colleagues focusing on Chinese infants, while Dos Santos and colleagues focused on Canadian infants.

“There was also a substantial difference in sample size between the two studies, with Dos Santos and colleagues examining > 500 more infants,” she said. “Additionally, the two studies differed in the sequencing technology used, sample collection methods, and antibiotic exposure, which can all impact microbiome study results.”

Since the current study showed efficacy and safety of VMT in a small clinical trial, larger trials with more diverse participants are needed to further examine the impact of VMT, said Dr. Knight. “The risks of vaginal microbiome transplant in mothers with infections should also be considered, and the mechanisms by which the neonatal gut microbiome impacts neurodevelopment need further investigation,” she said.

The study was funded by the National Key R&D Program of China, the Canadian Institute of Health Research, the National Natural Science Foundation of China, the Clinical Research Startup Program of Southern Medical University, China, and the Top Talent Program of Foshan Women and Children Hospital, China. The researchers and Dr. Knight had no financial conflicts to disclose.

Vaginal microbiota transfer may facilitate normal neurodevelopment for infants born via cesarean delivery, based on data from a new pilot study of 68 infants.

Previous studies have shown that gut microbiota in infancy could affect neurodevelopment, and infants delivered by cesarean are not exposed to potentially helpful microbes acquired by infants during vaginal delivery, wrote Lepeng Zhou, MD, of Southern Medical University, Guangdong, China, and colleagues.

“Infants delivered by C-section start life with very different bacteria than those born vaginally,” corresponding author Jose Clemente, PhD, of Icahn School of Medicine at Mount Sinai, New York, said in an interview. “Because this is the first time the newborn is exposed to microbes, we and others have hypothesized for some time that this ‘first encounter’ might be significant to shape the development of the baby,” he said.

“A few years ago, we demonstrated that it is possible to change the microbiome of C-section–delivered infants using an intervention that makes their microbiome more similar to that of a vaginally-delivered infant,” Dr. Clemente told this news organization. “In this study just published, we show that this procedure not only changes the microbiome of C-section infants, but it also modifies a health outcome (in this case, neurodevelopment). This is highly significant because it opens the way to reduce the risk that C-section infants have for certain conditions through a very simple microbial intervention,” he said.
 

‘Significantly higher’ ASQ-3 scores

In the current study, published in Cell Host & Microbe, the researchers examined the impact of vaginal microbiota transfer (VMT) on the neurodevelopment of cesarean-delivered infants. They randomized 35 women scheduled for cesarean delivery with a single infant to VMT and 41 to a control intervention of saline gauze for their infants immediately after delivery.

The primary outcome of infant neurodevelopment was assessed using the Ages and Stages Questionnaire (ASQ-3) score at 6 months. The researchers also collected fecal samples and assessed safety outcomes for the infants at 3, 7, 30, and 42 days after birth. The final analysis comprised 32 infants in the VMT group and 36 in the control group. The mean age of the mothers was 32 years; the mean gestational age of the infants was 39 weeks, but the difference was significant and slightly less in the VMT group compared with the controls (38.38 weeks vs. 39.13 weeks, P = .007). A group of 33 vaginally-delivered infants (VD) underwent ASQ-3 testing to serve as a reference group.

At 6 months, ASQ-3 scores were significantly higher (10.09%, P = .014) with VMT compared with controls, and the difference remained significant after adjustment for multiple factors including gestational age.

ASQ-3 total scores at 6 months were not significantly different between the VMT group and the VD reference group (mean difference of 8.84 VMT to VD, P = .346); scores between these groups also were similar at 3 months (mean difference of –1.48 VMT to VD, P = .900) and no significant differences appeared in ASQ-3 subdomains between these groups at either time period.

An examination of gut metabolites in stool showed significant differences in fecal metabolites and metabolic function, signs of gut microbiota maturation, the researchers noted.

“Interestingly, all the genera and metabolites that exhibited positive correlations with neurodevelopmental scores were upregulated in the VMT group, whereas the only negative correlation of Klebsiella was downregulated, indicating that VMT may impact neurodevelopment through the modulation of specific gut microbial genera and metabolites,” the researchers wrote.

No serious adverse events occurred in either group during the study period. Nine adverse events were reported; 4 in the VMT group and 5 in the control group. The most common AEs were mild skin disorders, including papules, pustules, and erythema.

The findings were limited by several factors including the potential for transfer not only of vaginal microbiota, but also vaginal metabolites, mycobiome, and virome, which blurs the potential mechanism of VMT, the researchers noted. Other limitations were the relatively short study period, small sample size, and cervical HPV screening within the past 5 years, not during pregnancy, they wrote.

However, the results suggest that VMT is safe, and may help improve the fecal microbiome in cesarean-delivered infants, and the long-term effects merit further studies in larger populations, they concluded.
 

Limitations and outlook

Dr. Clemente said in an interview that the researchers were “hopeful that the study would demonstrate a health benefit, as it does with some limitations.” The current study findings confirm some previous results showing that modification of the microbiomes of C-section infants is possible through a transfer of maternal vaginal microbes, he said.

“There is also an important aspect that was confirmed here: The lack of serious adverse events associated with the procedure, and the fact that transferring vaginal microbes did not increase the risk of adverse events compared to the control group or to vaginally-delivered infants. This is fundamental to establish that using rigorous exclusion criteria we can perform this procedure safely for infants and mothers,” he added.

“We are at very early stages yet to talk about clinical implications,” said Dr. Clemente. “This is one of the first studies to demonstrate a benefit to the transfer of microbes from mothers to infants, and as such it opens the way for future trials that confirm these findings. The clinical application is still in the future, but this is an important first step towards that goal.”

Interest in restoring gut microbiota to potentially benefit infants persists, but a recent study published in Frontiers and Cellular and Infection Microbiology contradicted the potential association between maternal vaginal microbiome and an infant’s gut microbiome based on an analysis of infant stool.

“There are many reasons why different studies might reach different conclusions: The experimental procedures, the analytical methods, the cohort under study,” Dr. Clemente said when asked to comment on the Frontiers study. “Further studies are needed to establish whether this procedure is equally effective under all conditions and whether health benefits are generalizable or specific to particular populations.”

Several research gaps remain, Dr. Clemente said. “First, neurodevelopment was measured through a questionnaire that captures various aspects such as communication, motor skills, or problem solving. While this is a standard way to establish that an infant is in the correct neurodevelopmental pathway, it is not a ‘hard’ measure of cellular or biochemical processes being impacted by the intervention. Some of our results suggest that there is a change in the metabolome of this infants, particularly an enrichment in GABA, a neurotransmitter, but the exact mechanisms by which the intervention is resulting in a health benefit still remains to be explored,” he said.

“We have an ongoing study here at Mount Sinai to test whether this microbial intervention can be effective in lowering the risk of developing food allergies in newborns who are at high risk, so that is another important future question: What other conditions could benefit from this approach,” said Dr. Clemente.

A third research goal, he added, is “determining what microbes precisely are responsible for the health benefits; this study uses a full microbial community to colonize infants. We show that this is effective and, importantly, that there were no significant adverse events in the treated infants,” he noted. “However, identifying what specific microbes are beneficial would further lower the risk of any potential side effects, while facilitating the development of drugs based on defined microbial consortia,” he said.
 

Safety and efficacy support further studies

“It is widely accepted that the gut microbiome of neonates varies based on mode of delivery,” Anna K. Knight, PhD, assistant professor of gynecology and obstetrics at Emory University, Atlanta, said in an interview.

“C-sections have been associated with increased risk of asthma and metabolic disease, and have been associated with differences in the development of the immune system,” said Dr. Knight, who was not involved in the study. “There have been small pilot studies examining the use of vaginal microbiome transplants to shift the gut microbiome of neonates born by C-section to be more like the gut microbiome of neonates born via vaginal delivery, but the safety and efficacy of this treatment has not been well established. This study examines both, while also evaluating potential changes in the metabolome and neurodevelopmental trajectories.”

The current study confirmed the impact of the neonatal gut microbe on neurodevelopmental outcomes during a sensitive period, said Dr. Knight. “The fact that these differences persisted at 6 months suggests that even if the microbiome composition between vaginally-delivered and preterm infants converged at 1-2 years old, there may be lasting impacts of mode of delivery,” she said.

“The results of this study suggest that vaginal microbiome transplant may be a safe and effective way to mitigate the negative impacts of C-section delivery on the neonatal gut microbiome, and may be protective for neurodevelopment,” she added.

Regarding the Frontiers in Medicine study, Dr. Knight noted that it examined a very different population, with Zhou and colleagues focusing on Chinese infants, while Dos Santos and colleagues focused on Canadian infants.

“There was also a substantial difference in sample size between the two studies, with Dos Santos and colleagues examining > 500 more infants,” she said. “Additionally, the two studies differed in the sequencing technology used, sample collection methods, and antibiotic exposure, which can all impact microbiome study results.”

Since the current study showed efficacy and safety of VMT in a small clinical trial, larger trials with more diverse participants are needed to further examine the impact of VMT, said Dr. Knight. “The risks of vaginal microbiome transplant in mothers with infections should also be considered, and the mechanisms by which the neonatal gut microbiome impacts neurodevelopment need further investigation,” she said.

The study was funded by the National Key R&D Program of China, the Canadian Institute of Health Research, the National Natural Science Foundation of China, the Clinical Research Startup Program of Southern Medical University, China, and the Top Talent Program of Foshan Women and Children Hospital, China. The researchers and Dr. Knight had no financial conflicts to disclose.

Vaginal microbiota transfer may facilitate normal neurodevelopment for infants born via cesarean delivery, based on data from a new pilot study of 68 infants.

Previous studies have shown that gut microbiota in infancy could affect neurodevelopment, and infants delivered by cesarean are not exposed to potentially helpful microbes acquired by infants during vaginal delivery, wrote Lepeng Zhou, MD, of Southern Medical University, Guangdong, China, and colleagues.

“Infants delivered by C-section start life with very different bacteria than those born vaginally,” corresponding author Jose Clemente, PhD, of Icahn School of Medicine at Mount Sinai, New York, said in an interview. “Because this is the first time the newborn is exposed to microbes, we and others have hypothesized for some time that this ‘first encounter’ might be significant to shape the development of the baby,” he said.

“A few years ago, we demonstrated that it is possible to change the microbiome of C-section–delivered infants using an intervention that makes their microbiome more similar to that of a vaginally-delivered infant,” Dr. Clemente told this news organization. “In this study just published, we show that this procedure not only changes the microbiome of C-section infants, but it also modifies a health outcome (in this case, neurodevelopment). This is highly significant because it opens the way to reduce the risk that C-section infants have for certain conditions through a very simple microbial intervention,” he said.
 

‘Significantly higher’ ASQ-3 scores

In the current study, published in Cell Host & Microbe, the researchers examined the impact of vaginal microbiota transfer (VMT) on the neurodevelopment of cesarean-delivered infants. They randomized 35 women scheduled for cesarean delivery with a single infant to VMT and 41 to a control intervention of saline gauze for their infants immediately after delivery.

The primary outcome of infant neurodevelopment was assessed using the Ages and Stages Questionnaire (ASQ-3) score at 6 months. The researchers also collected fecal samples and assessed safety outcomes for the infants at 3, 7, 30, and 42 days after birth. The final analysis comprised 32 infants in the VMT group and 36 in the control group. The mean age of the mothers was 32 years; the mean gestational age of the infants was 39 weeks, but the difference was significant and slightly less in the VMT group compared with the controls (38.38 weeks vs. 39.13 weeks, P = .007). A group of 33 vaginally-delivered infants (VD) underwent ASQ-3 testing to serve as a reference group.

At 6 months, ASQ-3 scores were significantly higher (10.09%, P = .014) with VMT compared with controls, and the difference remained significant after adjustment for multiple factors including gestational age.

ASQ-3 total scores at 6 months were not significantly different between the VMT group and the VD reference group (mean difference of 8.84 VMT to VD, P = .346); scores between these groups also were similar at 3 months (mean difference of –1.48 VMT to VD, P = .900) and no significant differences appeared in ASQ-3 subdomains between these groups at either time period.

An examination of gut metabolites in stool showed significant differences in fecal metabolites and metabolic function, signs of gut microbiota maturation, the researchers noted.

“Interestingly, all the genera and metabolites that exhibited positive correlations with neurodevelopmental scores were upregulated in the VMT group, whereas the only negative correlation of Klebsiella was downregulated, indicating that VMT may impact neurodevelopment through the modulation of specific gut microbial genera and metabolites,” the researchers wrote.

No serious adverse events occurred in either group during the study period. Nine adverse events were reported; 4 in the VMT group and 5 in the control group. The most common AEs were mild skin disorders, including papules, pustules, and erythema.

The findings were limited by several factors including the potential for transfer not only of vaginal microbiota, but also vaginal metabolites, mycobiome, and virome, which blurs the potential mechanism of VMT, the researchers noted. Other limitations were the relatively short study period, small sample size, and cervical HPV screening within the past 5 years, not during pregnancy, they wrote.

However, the results suggest that VMT is safe, and may help improve the fecal microbiome in cesarean-delivered infants, and the long-term effects merit further studies in larger populations, they concluded.
 

Limitations and outlook

Dr. Clemente said in an interview that the researchers were “hopeful that the study would demonstrate a health benefit, as it does with some limitations.” The current study findings confirm some previous results showing that modification of the microbiomes of C-section infants is possible through a transfer of maternal vaginal microbes, he said.

“There is also an important aspect that was confirmed here: The lack of serious adverse events associated with the procedure, and the fact that transferring vaginal microbes did not increase the risk of adverse events compared to the control group or to vaginally-delivered infants. This is fundamental to establish that using rigorous exclusion criteria we can perform this procedure safely for infants and mothers,” he added.

“We are at very early stages yet to talk about clinical implications,” said Dr. Clemente. “This is one of the first studies to demonstrate a benefit to the transfer of microbes from mothers to infants, and as such it opens the way for future trials that confirm these findings. The clinical application is still in the future, but this is an important first step towards that goal.”

Interest in restoring gut microbiota to potentially benefit infants persists, but a recent study published in Frontiers and Cellular and Infection Microbiology contradicted the potential association between maternal vaginal microbiome and an infant’s gut microbiome based on an analysis of infant stool.

“There are many reasons why different studies might reach different conclusions: The experimental procedures, the analytical methods, the cohort under study,” Dr. Clemente said when asked to comment on the Frontiers study. “Further studies are needed to establish whether this procedure is equally effective under all conditions and whether health benefits are generalizable or specific to particular populations.”

Several research gaps remain, Dr. Clemente said. “First, neurodevelopment was measured through a questionnaire that captures various aspects such as communication, motor skills, or problem solving. While this is a standard way to establish that an infant is in the correct neurodevelopmental pathway, it is not a ‘hard’ measure of cellular or biochemical processes being impacted by the intervention. Some of our results suggest that there is a change in the metabolome of this infants, particularly an enrichment in GABA, a neurotransmitter, but the exact mechanisms by which the intervention is resulting in a health benefit still remains to be explored,” he said.

“We have an ongoing study here at Mount Sinai to test whether this microbial intervention can be effective in lowering the risk of developing food allergies in newborns who are at high risk, so that is another important future question: What other conditions could benefit from this approach,” said Dr. Clemente.

A third research goal, he added, is “determining what microbes precisely are responsible for the health benefits; this study uses a full microbial community to colonize infants. We show that this is effective and, importantly, that there were no significant adverse events in the treated infants,” he noted. “However, identifying what specific microbes are beneficial would further lower the risk of any potential side effects, while facilitating the development of drugs based on defined microbial consortia,” he said.
 

Safety and efficacy support further studies

“It is widely accepted that the gut microbiome of neonates varies based on mode of delivery,” Anna K. Knight, PhD, assistant professor of gynecology and obstetrics at Emory University, Atlanta, said in an interview.

“C-sections have been associated with increased risk of asthma and metabolic disease, and have been associated with differences in the development of the immune system,” said Dr. Knight, who was not involved in the study. “There have been small pilot studies examining the use of vaginal microbiome transplants to shift the gut microbiome of neonates born by C-section to be more like the gut microbiome of neonates born via vaginal delivery, but the safety and efficacy of this treatment has not been well established. This study examines both, while also evaluating potential changes in the metabolome and neurodevelopmental trajectories.”

The current study confirmed the impact of the neonatal gut microbe on neurodevelopmental outcomes during a sensitive period, said Dr. Knight. “The fact that these differences persisted at 6 months suggests that even if the microbiome composition between vaginally-delivered and preterm infants converged at 1-2 years old, there may be lasting impacts of mode of delivery,” she said.

“The results of this study suggest that vaginal microbiome transplant may be a safe and effective way to mitigate the negative impacts of C-section delivery on the neonatal gut microbiome, and may be protective for neurodevelopment,” she added.

Regarding the Frontiers in Medicine study, Dr. Knight noted that it examined a very different population, with Zhou and colleagues focusing on Chinese infants, while Dos Santos and colleagues focused on Canadian infants.

“There was also a substantial difference in sample size between the two studies, with Dos Santos and colleagues examining > 500 more infants,” she said. “Additionally, the two studies differed in the sequencing technology used, sample collection methods, and antibiotic exposure, which can all impact microbiome study results.”

Since the current study showed efficacy and safety of VMT in a small clinical trial, larger trials with more diverse participants are needed to further examine the impact of VMT, said Dr. Knight. “The risks of vaginal microbiome transplant in mothers with infections should also be considered, and the mechanisms by which the neonatal gut microbiome impacts neurodevelopment need further investigation,” she said.

The study was funded by the National Key R&D Program of China, the Canadian Institute of Health Research, the National Natural Science Foundation of China, the Clinical Research Startup Program of Southern Medical University, China, and the Top Talent Program of Foshan Women and Children Hospital, China. The researchers and Dr. Knight had no financial conflicts to disclose.

Patients with comorbid respiratory disease were significantly more likely to develop nontuberculosis mycobacterial pulmonary disease (NTM-PD), data from a systematic review of 99 studies indicate.

NTM-PD is frequently underdiagnosed, and data on specific risk factors are lacking, especially for high-risk individuals with preexisting respiratory diseases, wrote Michael R. Loebinger, PhD, of Imperial College London, and colleagues.

“NTM-PD can be a substantial burden for patients, contributing to lung function decline and reduced health-related quality of life, and is associated with significant morbidity and mortality,” they said.

In a study published in the journal Chest, the researchers identified 99 studies published between 2011 and 2021. Of these, 24 reported an association between risk factors and NTM-PD among patients with respiratory disease compared with patients without NTM-PD and with healthy control persons without NTM-PD; these studies were included in the meta-analysis.

Overall, comorbid respiratory disease was significantly associated with an increased risk of NTM-PD, with odds ratios ranging from 4.15 for asthma to 21.43 for bronchiectasis. Other conditions significantly associated with NTM-PD risk included history of tuberculosis (odds ratio, 12.69), interstitial lung disease (OR, 6.39), and chronic obstructive pulmonary disease (COPD) (OR, 6.63).

Other factors associated with increased NTM-PD risk included inhaled corticosteroids (OR, 4.46), oral corticosteroids (OR, 3.37), and other immunosuppressants (OR, 2.60). Additional risk factors were use of anti–tumor necrosis factor-alpha for rheumatoid arthritis (OR, 2.13), solid tumors (OR, 4.66), current pneumonia (OR, 5.54), cardiovascular disease (OR, 1.73), and low body mass index (OR, 3.04).

Additional marginal or nonsignificant associations with NTM-PD risk were found for lung function, diabetes, renal disease, cancer, healthy weight, and infection with either Pseudomonas aeruginosa or Staphylococcus aureus.

Possible protective factors, though not significant, included increasing or high BMI and long-term macrolide use.

Bronchiectasis, which is associated with the highest risk of NTM-PD, was assessed in four studies. It was evaluated less frequently because it was often considered a reason for study exclusion, the researchers wrote in their discussion.

“However, many studies report high numbers of patients with nodular bronchiectatic NTM-PD and is suggested to be almost universal in patients with noncavitary NTM-PD,” they said.

The most common risk factors for NTM-PD in the included studies were the use of immunosuppressants, female sex, COPD comorbidity, and history of suspected tuberculosis.

The findings were limited by several factors, including the high level of heterogeneity among the included studies, the lack of data on attributable risk, and inconsistent definitions of NTM-PD, the researchers noted. However, the results may be useful for highlighting risk factors that could be used to identify high-risk patients and to promote early diagnosis and treatment, they said. In addition, long-term studies are needed regarding the impact of multiple potential risk factors on individual risk for NTM-PD among patients with respiratory disease, they concluded.

The study was supported by Insmed BV. Dr. Loebinger has relationships with Insmed, AstraZeneca, Chiesi, Savara, Parion, Zambon, 30T, Electromed, Recode, AN2 Therapeutics, and Armata.

A version of this article first appeared on Medscape.com.

Patients with comorbid respiratory disease were significantly more likely to develop nontuberculosis mycobacterial pulmonary disease (NTM-PD), data from a systematic review of 99 studies indicate.

NTM-PD is frequently underdiagnosed, and data on specific risk factors are lacking, especially for high-risk individuals with preexisting respiratory diseases, wrote Michael R. Loebinger, PhD, of Imperial College London, and colleagues.

“NTM-PD can be a substantial burden for patients, contributing to lung function decline and reduced health-related quality of life, and is associated with significant morbidity and mortality,” they said.

In a study published in the journal Chest, the researchers identified 99 studies published between 2011 and 2021. Of these, 24 reported an association between risk factors and NTM-PD among patients with respiratory disease compared with patients without NTM-PD and with healthy control persons without NTM-PD; these studies were included in the meta-analysis.

Overall, comorbid respiratory disease was significantly associated with an increased risk of NTM-PD, with odds ratios ranging from 4.15 for asthma to 21.43 for bronchiectasis. Other conditions significantly associated with NTM-PD risk included history of tuberculosis (odds ratio, 12.69), interstitial lung disease (OR, 6.39), and chronic obstructive pulmonary disease (COPD) (OR, 6.63).

Other factors associated with increased NTM-PD risk included inhaled corticosteroids (OR, 4.46), oral corticosteroids (OR, 3.37), and other immunosuppressants (OR, 2.60). Additional risk factors were use of anti–tumor necrosis factor-alpha for rheumatoid arthritis (OR, 2.13), solid tumors (OR, 4.66), current pneumonia (OR, 5.54), cardiovascular disease (OR, 1.73), and low body mass index (OR, 3.04).

Additional marginal or nonsignificant associations with NTM-PD risk were found for lung function, diabetes, renal disease, cancer, healthy weight, and infection with either Pseudomonas aeruginosa or Staphylococcus aureus.

Possible protective factors, though not significant, included increasing or high BMI and long-term macrolide use.

Bronchiectasis, which is associated with the highest risk of NTM-PD, was assessed in four studies. It was evaluated less frequently because it was often considered a reason for study exclusion, the researchers wrote in their discussion.

“However, many studies report high numbers of patients with nodular bronchiectatic NTM-PD and is suggested to be almost universal in patients with noncavitary NTM-PD,” they said.

The most common risk factors for NTM-PD in the included studies were the use of immunosuppressants, female sex, COPD comorbidity, and history of suspected tuberculosis.

The findings were limited by several factors, including the high level of heterogeneity among the included studies, the lack of data on attributable risk, and inconsistent definitions of NTM-PD, the researchers noted. However, the results may be useful for highlighting risk factors that could be used to identify high-risk patients and to promote early diagnosis and treatment, they said. In addition, long-term studies are needed regarding the impact of multiple potential risk factors on individual risk for NTM-PD among patients with respiratory disease, they concluded.

The study was supported by Insmed BV. Dr. Loebinger has relationships with Insmed, AstraZeneca, Chiesi, Savara, Parion, Zambon, 30T, Electromed, Recode, AN2 Therapeutics, and Armata.

A version of this article first appeared on Medscape.com.

Patients with comorbid respiratory disease were significantly more likely to develop nontuberculosis mycobacterial pulmonary disease (NTM-PD), data from a systematic review of 99 studies indicate.

NTM-PD is frequently underdiagnosed, and data on specific risk factors are lacking, especially for high-risk individuals with preexisting respiratory diseases, wrote Michael R. Loebinger, PhD, of Imperial College London, and colleagues.

“NTM-PD can be a substantial burden for patients, contributing to lung function decline and reduced health-related quality of life, and is associated with significant morbidity and mortality,” they said.

In a study published in the journal Chest, the researchers identified 99 studies published between 2011 and 2021. Of these, 24 reported an association between risk factors and NTM-PD among patients with respiratory disease compared with patients without NTM-PD and with healthy control persons without NTM-PD; these studies were included in the meta-analysis.

Overall, comorbid respiratory disease was significantly associated with an increased risk of NTM-PD, with odds ratios ranging from 4.15 for asthma to 21.43 for bronchiectasis. Other conditions significantly associated with NTM-PD risk included history of tuberculosis (odds ratio, 12.69), interstitial lung disease (OR, 6.39), and chronic obstructive pulmonary disease (COPD) (OR, 6.63).

Other factors associated with increased NTM-PD risk included inhaled corticosteroids (OR, 4.46), oral corticosteroids (OR, 3.37), and other immunosuppressants (OR, 2.60). Additional risk factors were use of anti–tumor necrosis factor-alpha for rheumatoid arthritis (OR, 2.13), solid tumors (OR, 4.66), current pneumonia (OR, 5.54), cardiovascular disease (OR, 1.73), and low body mass index (OR, 3.04).

Additional marginal or nonsignificant associations with NTM-PD risk were found for lung function, diabetes, renal disease, cancer, healthy weight, and infection with either Pseudomonas aeruginosa or Staphylococcus aureus.

Possible protective factors, though not significant, included increasing or high BMI and long-term macrolide use.

Bronchiectasis, which is associated with the highest risk of NTM-PD, was assessed in four studies. It was evaluated less frequently because it was often considered a reason for study exclusion, the researchers wrote in their discussion.

“However, many studies report high numbers of patients with nodular bronchiectatic NTM-PD and is suggested to be almost universal in patients with noncavitary NTM-PD,” they said.

The most common risk factors for NTM-PD in the included studies were the use of immunosuppressants, female sex, COPD comorbidity, and history of suspected tuberculosis.

The findings were limited by several factors, including the high level of heterogeneity among the included studies, the lack of data on attributable risk, and inconsistent definitions of NTM-PD, the researchers noted. However, the results may be useful for highlighting risk factors that could be used to identify high-risk patients and to promote early diagnosis and treatment, they said. In addition, long-term studies are needed regarding the impact of multiple potential risk factors on individual risk for NTM-PD among patients with respiratory disease, they concluded.

The study was supported by Insmed BV. Dr. Loebinger has relationships with Insmed, AstraZeneca, Chiesi, Savara, Parion, Zambon, 30T, Electromed, Recode, AN2 Therapeutics, and Armata.

A version of this article first appeared on Medscape.com.

Complications from sickle cell disease (SCD) can affect education and life opportunities, and these complications have been associated with social determinants of health such as socioeconomic status, depression, health literacy, and level of education, according to Kelly M. Harris, PhD, of Washington University in St. Louis, and colleagues.

Pain is a hallmark of SCD, and “the current climate around pain management and opioid use has specific implications for individuals with [SCD], especially youth,” Dr. Harris said in an interview.

In a study published in JAMA Network Open, the researchers analyzed 2,264 participants (average age, 27.9 years; 56.2% were female) in the Sickle Cell Disease Implementation Consortium a study that includes patient assessment, treatment, and creation of a longitudinal registry.

The participants completed the Adult Sickle Cell Quality of Life Measurement Information System to provide data on the frequency and severity of pain episodes related to SCD over the past 12 months. Multivariable regression analysis was used to examine the associations of education, employment, and mental health with pain frequency and severity.

Overall, 79.8% of participants reported severe pain, and 47.8% reported more than four episodes of pain in the past year.

Notably, 20% of the participants were diagnosed with depression, and increased pain frequency was significantly associated with depression, although no significant association appeared between pain severity and depression, the researchers said.

A total of 47% of the participants reported using pain medication and 49% reported using hydroxyurea. In addition, 628 participants (28.0%) underwent regular blood transfusions.

Neither education level nor income was associated with increased pain frequency or severity. Age younger than 18 years was significantly associated with both pain frequency and severity, as was daily used of pain medication. Unemployment and female sex also were associated with increased pain frequency.

The findings were limited by several factors including the cross-sectional design that prevents conclusions of causality, and by the reliance on patient reports of depression, which likely led to underreporting, the researchers noted.

However, the results are consistent with previous studies suggesting that pain and negative feelings were associated with reduced quality of life in SCD patients, especially younger patients, and support the need to screen SCD patients for depression, especially those who report more severe and/or more frequent pain, they said.
 

Take a comprehensive approach to a complex condition

“When treating pain, we cannot just rely on medication,” Dr. Harris said. “It is important that providers consider the full experiences of patients and pursue holistic and comprehensive treatment approaches to reducing pain. Screening for depression should be a regular practice, particularly for patients experiencing frequent and/or severe pain.

“Racial discrimination, stigma, and bias impact pain diagnosis and treatment for individuals with SCD,” said Dr. Harris. “Increasing awareness of the associations between depression and pain frequency and severity ... may help address these barriers.”
 

Data highlight treatment gaps

Alexander A. Boucher, MD, a member of the division of pediatric hematology and oncology at the University of Minnesota, Minneapolis, noted the researchers included patients as young as midadolescence, with a majority being under 35 years old. “The 18- to 30-year-old range is an especially high-risk age window for increased acute health care utilization, even compared with other chronic adolescent/young adult conditions. “The demographics in the study group also reasonably approximate those for young adults with SCD in urban centers. By taking a multicenter approach across a several-state region, I believe the findings offer better generalizability, since health care access and mental health access can vary state-by-state,” and the current results show a more standard experience.

“It was a bit surprising that female [sex] maintained such an association with pain across the different components of the study,” and that the pain peak was in the 25- to 34-year-old age range, said Dr. Boucher. However, anecdotally, the late teens and early 20s “can be laden with mental health concerns due to the life transitions that accompany most people at that time. The note that hydroxyurea use was associated with more pain and depression symptoms was interesting, and serves as a reminder that what is happening to the red blood cells and in the blood vessels, such as red blood cell breakdown, sickling, and vaso-occlusion are only a part of what causes pain, and hydroxyurea is not likely to play a role in mitigating mental health aspects of pain.”

The findings that overall pain frequency and related pain medication use were associated with higher depression rates “may in part reflect a blind spot for physicians and medical teams, who often resort back to physical pain-based heuristics.” Physicians may misunderstand chronic pain and its management and look for quick fixes for pain out of uncertainty or urgency, said Dr. Boucher. “This serves to diminish the perspectives of patients as people first (not embodiments of a disease) and can lead to missed opportunities to tackle mental health challenges.”
 

Barriers and limitations

There are barriers to mental health screening in hematology care,” Dr. Boucher said. First, most hematologists are not experts in mental health and while they may have some from their medical training in these disorders, it can be difficult to maintain the level of health literacy needed to stay up to date on treatments. Second, depression screening may not be part of regular patient intake and the Patient Health Questionnaire–2 or PHQ-9 offer only short-term (2-week) snapshots of depression.

“Perhaps most critically, even if we do successfully screen, the access to mental health specialists is severely limited, just as it is across the medical landscape, so intervention opportunities may be suboptimal,” said Dr. Boucher. The problem is magnified if, as the current study suggests, the rates of depression in SCD are approximately three times greater than the population overall.

In the current study, “the fact that only half of those who self-reported depression symptoms actually had depression documented as a diagnosis in their medical records suggests that we are missing a lot of patients affected by mental health disturbances.”

This study is limited in measurement of the contribution of social determinants of health, he said, as they were primarily focused on employment status and income. The study does not describe other factors like support systems, housing, and transportation.

“I would like to see studies that not only identify associated drivers of pain, but also offer evidence for successful interventions,” Dr. Boucher said, and these studies should include patient-centered interventions versus disease-centered interventions.
 

Undertreatment persists

Other concerns with sickle cell anemia include the underuse of hydroxyurea to reduce complications associated with the disease such as pain, stroke, and even early death. Another recent study in JAMA Network Open suggested that use of hydroxyurea remained low in children and youth despite the issuing of guidelines, and that underserved populations were especially affected. In that study, the researchers found that the patients’ annual days’ supply of hydroxyurea in New York state did not change significantly after the guideline update.

SCD also has been associated with increased risk of other poor outcomes, such as stillbirth and increased risk of poor COVID-19–related outcomes and COVID-19–related deaths.

The study by Dr. Harris and colleagues was supported by the National Institutes of Health through the National Heart, Lung, and Blood Institute and the National Institute on Minority Health and Health Disparities. Dr. Harris had no financial conflicts to disclose. The hydroxyurea study was supported by the Agency for Healthcare Research and Quality and the NHLBI. The researchers had no financial conflicts to disclose. Dr. Boucher disclosed conducting research with SCL Behring, but had no relevant financial conflicts.

Complications from sickle cell disease (SCD) can affect education and life opportunities, and these complications have been associated with social determinants of health such as socioeconomic status, depression, health literacy, and level of education, according to Kelly M. Harris, PhD, of Washington University in St. Louis, and colleagues.

Pain is a hallmark of SCD, and “the current climate around pain management and opioid use has specific implications for individuals with [SCD], especially youth,” Dr. Harris said in an interview.

In a study published in JAMA Network Open, the researchers analyzed 2,264 participants (average age, 27.9 years; 56.2% were female) in the Sickle Cell Disease Implementation Consortium a study that includes patient assessment, treatment, and creation of a longitudinal registry.

The participants completed the Adult Sickle Cell Quality of Life Measurement Information System to provide data on the frequency and severity of pain episodes related to SCD over the past 12 months. Multivariable regression analysis was used to examine the associations of education, employment, and mental health with pain frequency and severity.

Overall, 79.8% of participants reported severe pain, and 47.8% reported more than four episodes of pain in the past year.

Notably, 20% of the participants were diagnosed with depression, and increased pain frequency was significantly associated with depression, although no significant association appeared between pain severity and depression, the researchers said.

A total of 47% of the participants reported using pain medication and 49% reported using hydroxyurea. In addition, 628 participants (28.0%) underwent regular blood transfusions.

Neither education level nor income was associated with increased pain frequency or severity. Age younger than 18 years was significantly associated with both pain frequency and severity, as was daily used of pain medication. Unemployment and female sex also were associated with increased pain frequency.

The findings were limited by several factors including the cross-sectional design that prevents conclusions of causality, and by the reliance on patient reports of depression, which likely led to underreporting, the researchers noted.

However, the results are consistent with previous studies suggesting that pain and negative feelings were associated with reduced quality of life in SCD patients, especially younger patients, and support the need to screen SCD patients for depression, especially those who report more severe and/or more frequent pain, they said.
 

Take a comprehensive approach to a complex condition

“When treating pain, we cannot just rely on medication,” Dr. Harris said. “It is important that providers consider the full experiences of patients and pursue holistic and comprehensive treatment approaches to reducing pain. Screening for depression should be a regular practice, particularly for patients experiencing frequent and/or severe pain.

“Racial discrimination, stigma, and bias impact pain diagnosis and treatment for individuals with SCD,” said Dr. Harris. “Increasing awareness of the associations between depression and pain frequency and severity ... may help address these barriers.”
 

Data highlight treatment gaps

Alexander A. Boucher, MD, a member of the division of pediatric hematology and oncology at the University of Minnesota, Minneapolis, noted the researchers included patients as young as midadolescence, with a majority being under 35 years old. “The 18- to 30-year-old range is an especially high-risk age window for increased acute health care utilization, even compared with other chronic adolescent/young adult conditions. “The demographics in the study group also reasonably approximate those for young adults with SCD in urban centers. By taking a multicenter approach across a several-state region, I believe the findings offer better generalizability, since health care access and mental health access can vary state-by-state,” and the current results show a more standard experience.

“It was a bit surprising that female [sex] maintained such an association with pain across the different components of the study,” and that the pain peak was in the 25- to 34-year-old age range, said Dr. Boucher. However, anecdotally, the late teens and early 20s “can be laden with mental health concerns due to the life transitions that accompany most people at that time. The note that hydroxyurea use was associated with more pain and depression symptoms was interesting, and serves as a reminder that what is happening to the red blood cells and in the blood vessels, such as red blood cell breakdown, sickling, and vaso-occlusion are only a part of what causes pain, and hydroxyurea is not likely to play a role in mitigating mental health aspects of pain.”

The findings that overall pain frequency and related pain medication use were associated with higher depression rates “may in part reflect a blind spot for physicians and medical teams, who often resort back to physical pain-based heuristics.” Physicians may misunderstand chronic pain and its management and look for quick fixes for pain out of uncertainty or urgency, said Dr. Boucher. “This serves to diminish the perspectives of patients as people first (not embodiments of a disease) and can lead to missed opportunities to tackle mental health challenges.”
 

Barriers and limitations

There are barriers to mental health screening in hematology care,” Dr. Boucher said. First, most hematologists are not experts in mental health and while they may have some from their medical training in these disorders, it can be difficult to maintain the level of health literacy needed to stay up to date on treatments. Second, depression screening may not be part of regular patient intake and the Patient Health Questionnaire–2 or PHQ-9 offer only short-term (2-week) snapshots of depression.

“Perhaps most critically, even if we do successfully screen, the access to mental health specialists is severely limited, just as it is across the medical landscape, so intervention opportunities may be suboptimal,” said Dr. Boucher. The problem is magnified if, as the current study suggests, the rates of depression in SCD are approximately three times greater than the population overall.

In the current study, “the fact that only half of those who self-reported depression symptoms actually had depression documented as a diagnosis in their medical records suggests that we are missing a lot of patients affected by mental health disturbances.”

This study is limited in measurement of the contribution of social determinants of health, he said, as they were primarily focused on employment status and income. The study does not describe other factors like support systems, housing, and transportation.

“I would like to see studies that not only identify associated drivers of pain, but also offer evidence for successful interventions,” Dr. Boucher said, and these studies should include patient-centered interventions versus disease-centered interventions.
 

Undertreatment persists

Other concerns with sickle cell anemia include the underuse of hydroxyurea to reduce complications associated with the disease such as pain, stroke, and even early death. Another recent study in JAMA Network Open suggested that use of hydroxyurea remained low in children and youth despite the issuing of guidelines, and that underserved populations were especially affected. In that study, the researchers found that the patients’ annual days’ supply of hydroxyurea in New York state did not change significantly after the guideline update.

SCD also has been associated with increased risk of other poor outcomes, such as stillbirth and increased risk of poor COVID-19–related outcomes and COVID-19–related deaths.

The study by Dr. Harris and colleagues was supported by the National Institutes of Health through the National Heart, Lung, and Blood Institute and the National Institute on Minority Health and Health Disparities. Dr. Harris had no financial conflicts to disclose. The hydroxyurea study was supported by the Agency for Healthcare Research and Quality and the NHLBI. The researchers had no financial conflicts to disclose. Dr. Boucher disclosed conducting research with SCL Behring, but had no relevant financial conflicts.

Complications from sickle cell disease (SCD) can affect education and life opportunities, and these complications have been associated with social determinants of health such as socioeconomic status, depression, health literacy, and level of education, according to Kelly M. Harris, PhD, of Washington University in St. Louis, and colleagues.

Pain is a hallmark of SCD, and “the current climate around pain management and opioid use has specific implications for individuals with [SCD], especially youth,” Dr. Harris said in an interview.

In a study published in JAMA Network Open, the researchers analyzed 2,264 participants (average age, 27.9 years; 56.2% were female) in the Sickle Cell Disease Implementation Consortium a study that includes patient assessment, treatment, and creation of a longitudinal registry.

The participants completed the Adult Sickle Cell Quality of Life Measurement Information System to provide data on the frequency and severity of pain episodes related to SCD over the past 12 months. Multivariable regression analysis was used to examine the associations of education, employment, and mental health with pain frequency and severity.

Overall, 79.8% of participants reported severe pain, and 47.8% reported more than four episodes of pain in the past year.

Notably, 20% of the participants were diagnosed with depression, and increased pain frequency was significantly associated with depression, although no significant association appeared between pain severity and depression, the researchers said.

A total of 47% of the participants reported using pain medication and 49% reported using hydroxyurea. In addition, 628 participants (28.0%) underwent regular blood transfusions.

Neither education level nor income was associated with increased pain frequency or severity. Age younger than 18 years was significantly associated with both pain frequency and severity, as was daily used of pain medication. Unemployment and female sex also were associated with increased pain frequency.

The findings were limited by several factors including the cross-sectional design that prevents conclusions of causality, and by the reliance on patient reports of depression, which likely led to underreporting, the researchers noted.

However, the results are consistent with previous studies suggesting that pain and negative feelings were associated with reduced quality of life in SCD patients, especially younger patients, and support the need to screen SCD patients for depression, especially those who report more severe and/or more frequent pain, they said.
 

Take a comprehensive approach to a complex condition

“When treating pain, we cannot just rely on medication,” Dr. Harris said. “It is important that providers consider the full experiences of patients and pursue holistic and comprehensive treatment approaches to reducing pain. Screening for depression should be a regular practice, particularly for patients experiencing frequent and/or severe pain.

“Racial discrimination, stigma, and bias impact pain diagnosis and treatment for individuals with SCD,” said Dr. Harris. “Increasing awareness of the associations between depression and pain frequency and severity ... may help address these barriers.”
 

Data highlight treatment gaps

Alexander A. Boucher, MD, a member of the division of pediatric hematology and oncology at the University of Minnesota, Minneapolis, noted the researchers included patients as young as midadolescence, with a majority being under 35 years old. “The 18- to 30-year-old range is an especially high-risk age window for increased acute health care utilization, even compared with other chronic adolescent/young adult conditions. “The demographics in the study group also reasonably approximate those for young adults with SCD in urban centers. By taking a multicenter approach across a several-state region, I believe the findings offer better generalizability, since health care access and mental health access can vary state-by-state,” and the current results show a more standard experience.

“It was a bit surprising that female [sex] maintained such an association with pain across the different components of the study,” and that the pain peak was in the 25- to 34-year-old age range, said Dr. Boucher. However, anecdotally, the late teens and early 20s “can be laden with mental health concerns due to the life transitions that accompany most people at that time. The note that hydroxyurea use was associated with more pain and depression symptoms was interesting, and serves as a reminder that what is happening to the red blood cells and in the blood vessels, such as red blood cell breakdown, sickling, and vaso-occlusion are only a part of what causes pain, and hydroxyurea is not likely to play a role in mitigating mental health aspects of pain.”

The findings that overall pain frequency and related pain medication use were associated with higher depression rates “may in part reflect a blind spot for physicians and medical teams, who often resort back to physical pain-based heuristics.” Physicians may misunderstand chronic pain and its management and look for quick fixes for pain out of uncertainty or urgency, said Dr. Boucher. “This serves to diminish the perspectives of patients as people first (not embodiments of a disease) and can lead to missed opportunities to tackle mental health challenges.”
 

Barriers and limitations

There are barriers to mental health screening in hematology care,” Dr. Boucher said. First, most hematologists are not experts in mental health and while they may have some from their medical training in these disorders, it can be difficult to maintain the level of health literacy needed to stay up to date on treatments. Second, depression screening may not be part of regular patient intake and the Patient Health Questionnaire–2 or PHQ-9 offer only short-term (2-week) snapshots of depression.

“Perhaps most critically, even if we do successfully screen, the access to mental health specialists is severely limited, just as it is across the medical landscape, so intervention opportunities may be suboptimal,” said Dr. Boucher. The problem is magnified if, as the current study suggests, the rates of depression in SCD are approximately three times greater than the population overall.

In the current study, “the fact that only half of those who self-reported depression symptoms actually had depression documented as a diagnosis in their medical records suggests that we are missing a lot of patients affected by mental health disturbances.”

This study is limited in measurement of the contribution of social determinants of health, he said, as they were primarily focused on employment status and income. The study does not describe other factors like support systems, housing, and transportation.

“I would like to see studies that not only identify associated drivers of pain, but also offer evidence for successful interventions,” Dr. Boucher said, and these studies should include patient-centered interventions versus disease-centered interventions.
 

Undertreatment persists

Other concerns with sickle cell anemia include the underuse of hydroxyurea to reduce complications associated with the disease such as pain, stroke, and even early death. Another recent study in JAMA Network Open suggested that use of hydroxyurea remained low in children and youth despite the issuing of guidelines, and that underserved populations were especially affected. In that study, the researchers found that the patients’ annual days’ supply of hydroxyurea in New York state did not change significantly after the guideline update.

SCD also has been associated with increased risk of other poor outcomes, such as stillbirth and increased risk of poor COVID-19–related outcomes and COVID-19–related deaths.

The study by Dr. Harris and colleagues was supported by the National Institutes of Health through the National Heart, Lung, and Blood Institute and the National Institute on Minority Health and Health Disparities. Dr. Harris had no financial conflicts to disclose. The hydroxyurea study was supported by the Agency for Healthcare Research and Quality and the NHLBI. The researchers had no financial conflicts to disclose. Dr. Boucher disclosed conducting research with SCL Behring, but had no relevant financial conflicts.

Baseline depression was significantly associated with recovered, incident, and persistent metabolic syndrome, based on data from more than 13,000 individuals.

Previous research has established a connection between metabolic syndrome and depression, but data on the increased risk for depressed individuals to develop metabolic syndrome (MetS) are lacking, wrote Lara Onofre Ferriani, PhD, of Federal University of Espírito Santo, Vitoria, Brazil, and colleagues.

“Individuals with MetS and depression have increased levels of inflammatory markers, and it is speculated that inflammation could mediate this comorbidity,” they said.

In a study published in the Journal of Psychiatric Research, the investigators reviewed data from 13,883 participants in the Brazilian Longitudinal Study of Adult Health; all were civil servants at universities in Brazil. The participants ranged from 35 to 74 years of age, with a mean age of 51.9 years; 54.3% were women; and 52.4% were white; the mean follow-up period was 3.8 years.

The primary outcome was the association between depression diagnosis and severity on components of MetS at baseline and over a 4-year period. Participants were classified by MetS trajectory as recovered, incident, or persistent, and classified by depression status as without depression or with a mild, moderate, or severe current depressive episode. Depression status was based on the Clinical Interview Schedule Revised. MetS components and diagnosis were based on the National Cholesterol Education Program Adult Treatment Panel III.

In a logistic regression analysis, baseline depression was positively associated with recovered, incident, and persistent MetS (odds ratios, 1.59, 1.45, and 1.70, respectively).

Depression at baseline also was significantly associated with separate components of MetS: large waist circumference, high triglycerides, low high-density lipoprotein cholesterol, and hyperglycemia, with odds ratios of 1.47, 1.23, 1.30, and 1.38, respectively.

Although not seen at baseline, a significant positive association between baseline depression and the presence of three or more MetS components was noted at follow-up, with a positive dose-response effect, the researchers wrote in their discussion.

Not all associations were statistically significant, but this was mainly because of the small number of cases of moderate and severe depression, they said. However, the magnitude of associations was greater in severe depression, when compared with moderate and mild, which suggests that the risk of MetS may be higher in this population, they added.

The study findings were limited by several factors including the possible misclassification of depression, inability to differentiate among depressive subtypes, and the potential lack of generalizability to other populations beyond Brazilian civil servants, the researchers noted.

However, the results were strengthened by the large sample size and support the role of depression as a risk factor for MetS, they said. More research is needed to determine a bidirectional relationship and to assess the trajectory of depression after MetS develops, but the findings “highlight the need to investigate and manage metabolic and cardiovascular alterations in the presence of depression in clinical settings,” they concluded.

The study was supported by the Brazilian Ministry of Health (Science and Technology Department) and the Brazilian Ministry of Science, Technology and Innovation FINEP and CNPq, and by the Coordenaçaõ de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES). The researchers had no financial conflicts to disclose.
 

Baseline depression was significantly associated with recovered, incident, and persistent metabolic syndrome, based on data from more than 13,000 individuals.

Previous research has established a connection between metabolic syndrome and depression, but data on the increased risk for depressed individuals to develop metabolic syndrome (MetS) are lacking, wrote Lara Onofre Ferriani, PhD, of Federal University of Espírito Santo, Vitoria, Brazil, and colleagues.

“Individuals with MetS and depression have increased levels of inflammatory markers, and it is speculated that inflammation could mediate this comorbidity,” they said.

In a study published in the Journal of Psychiatric Research, the investigators reviewed data from 13,883 participants in the Brazilian Longitudinal Study of Adult Health; all were civil servants at universities in Brazil. The participants ranged from 35 to 74 years of age, with a mean age of 51.9 years; 54.3% were women; and 52.4% were white; the mean follow-up period was 3.8 years.

The primary outcome was the association between depression diagnosis and severity on components of MetS at baseline and over a 4-year period. Participants were classified by MetS trajectory as recovered, incident, or persistent, and classified by depression status as without depression or with a mild, moderate, or severe current depressive episode. Depression status was based on the Clinical Interview Schedule Revised. MetS components and diagnosis were based on the National Cholesterol Education Program Adult Treatment Panel III.

In a logistic regression analysis, baseline depression was positively associated with recovered, incident, and persistent MetS (odds ratios, 1.59, 1.45, and 1.70, respectively).

Depression at baseline also was significantly associated with separate components of MetS: large waist circumference, high triglycerides, low high-density lipoprotein cholesterol, and hyperglycemia, with odds ratios of 1.47, 1.23, 1.30, and 1.38, respectively.

Although not seen at baseline, a significant positive association between baseline depression and the presence of three or more MetS components was noted at follow-up, with a positive dose-response effect, the researchers wrote in their discussion.

Not all associations were statistically significant, but this was mainly because of the small number of cases of moderate and severe depression, they said. However, the magnitude of associations was greater in severe depression, when compared with moderate and mild, which suggests that the risk of MetS may be higher in this population, they added.

The study findings were limited by several factors including the possible misclassification of depression, inability to differentiate among depressive subtypes, and the potential lack of generalizability to other populations beyond Brazilian civil servants, the researchers noted.

However, the results were strengthened by the large sample size and support the role of depression as a risk factor for MetS, they said. More research is needed to determine a bidirectional relationship and to assess the trajectory of depression after MetS develops, but the findings “highlight the need to investigate and manage metabolic and cardiovascular alterations in the presence of depression in clinical settings,” they concluded.

The study was supported by the Brazilian Ministry of Health (Science and Technology Department) and the Brazilian Ministry of Science, Technology and Innovation FINEP and CNPq, and by the Coordenaçaõ de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES). The researchers had no financial conflicts to disclose.
 

Baseline depression was significantly associated with recovered, incident, and persistent metabolic syndrome, based on data from more than 13,000 individuals.

Previous research has established a connection between metabolic syndrome and depression, but data on the increased risk for depressed individuals to develop metabolic syndrome (MetS) are lacking, wrote Lara Onofre Ferriani, PhD, of Federal University of Espírito Santo, Vitoria, Brazil, and colleagues.

“Individuals with MetS and depression have increased levels of inflammatory markers, and it is speculated that inflammation could mediate this comorbidity,” they said.

In a study published in the Journal of Psychiatric Research, the investigators reviewed data from 13,883 participants in the Brazilian Longitudinal Study of Adult Health; all were civil servants at universities in Brazil. The participants ranged from 35 to 74 years of age, with a mean age of 51.9 years; 54.3% were women; and 52.4% were white; the mean follow-up period was 3.8 years.

The primary outcome was the association between depression diagnosis and severity on components of MetS at baseline and over a 4-year period. Participants were classified by MetS trajectory as recovered, incident, or persistent, and classified by depression status as without depression or with a mild, moderate, or severe current depressive episode. Depression status was based on the Clinical Interview Schedule Revised. MetS components and diagnosis were based on the National Cholesterol Education Program Adult Treatment Panel III.

In a logistic regression analysis, baseline depression was positively associated with recovered, incident, and persistent MetS (odds ratios, 1.59, 1.45, and 1.70, respectively).

Depression at baseline also was significantly associated with separate components of MetS: large waist circumference, high triglycerides, low high-density lipoprotein cholesterol, and hyperglycemia, with odds ratios of 1.47, 1.23, 1.30, and 1.38, respectively.

Although not seen at baseline, a significant positive association between baseline depression and the presence of three or more MetS components was noted at follow-up, with a positive dose-response effect, the researchers wrote in their discussion.

Not all associations were statistically significant, but this was mainly because of the small number of cases of moderate and severe depression, they said. However, the magnitude of associations was greater in severe depression, when compared with moderate and mild, which suggests that the risk of MetS may be higher in this population, they added.

The study findings were limited by several factors including the possible misclassification of depression, inability to differentiate among depressive subtypes, and the potential lack of generalizability to other populations beyond Brazilian civil servants, the researchers noted.

However, the results were strengthened by the large sample size and support the role of depression as a risk factor for MetS, they said. More research is needed to determine a bidirectional relationship and to assess the trajectory of depression after MetS develops, but the findings “highlight the need to investigate and manage metabolic and cardiovascular alterations in the presence of depression in clinical settings,” they concluded.

The study was supported by the Brazilian Ministry of Health (Science and Technology Department) and the Brazilian Ministry of Science, Technology and Innovation FINEP and CNPq, and by the Coordenaçaõ de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES). The researchers had no financial conflicts to disclose.
 

An electronic exhaled breath analyzer showed differences in breath profiles of patients with chronic obstructive pulmonary disease who did and did not develop lung cancer, based on data from a prospective study of approximately 800 individuals.

Lung cancer remains a major cause of death in patients with chronic obstructive pulmonary disease (COPD), but many cases may go undetected in the early stage because of lack of screening and lack of validated predictive biomarkers, wrote Rianne de Vries, PhD, of the University of Amsterdam, and colleagues.

Accurate, noninvasive tests to screen patients with COPD for lung cancer are needed, and molecular profiling of exhaled breath using electronic nose (eNose) technology has shown potential as a method of early detection by identifying patterns of exhaled volatile organic compounds (VOCs), they said.

In a study published in the journal Chest, the researchers reviewed data from 682 adults with COPD and 211 with lung cancer who were enrolled in BreathCloud, a multicenter, observational study of healthy controls and individuals with suspected or confirmed diagnosis of asthma, COPD, or lung cancer.

Patients’ breath profiles were collected at study enrollment, between May 2017 and November 2018, using a metal oxide semiconductor eNose (SpiroNose).

Data from the eNose included the highest sensor peak normalized to the most stable sensor and the ratio between sensor peak and breath hold point. These variables were combined into four principal components (PCs) that captured 78.4% of variance in the dataset, and training and validation sets were constructed for all subjects. The researchers calculated a receiver operating characteristic (ROC) curve, including the area under the curve (AUC).

All patients were treated with standard clinical care and were monitored for development of clinically diagnosed lung cancer for 2 years, confirmed via CT imaging. The mean age of the patients was 64 years, and demographics at baseline were similar for patients with and without lung cancer.

After exclusion of 116 patients with both COPD and lung cancer, the analysis showed an accuracy of 90% and a ROC-AUC of 0.95.

Within 2 years of study enrollment, 37 patients with COPD (5.4%) developed lung cancer. In training sets and validation sets, the principal components one, two, and three were significantly different in patients with COPD who developed lung cancer and those who did not, (P = .002, P < .001, P < .001, respectively). The ROC-AUCs of the testing and validation sets were 0.89 and 0.86, respectively.

“Interestingly, the VOC pattern associated with early development of lung cancer in COPD did not match to the pattern related to lung cancer stages, as the former was mainly captured by PC2 and the latter by PC3,” the researchers wrote in their discussion. “This suggests that early identification of upcoming clinically manifest lung cancer in patients with COPD by eNose is not driven by VOCs that are predominantly associated with a particular stage of the disease,” they said.

The findings were limited by several factors including the lack of CT scanning at baseline because of the real-world design, so the presence of any baseline tumors was unknown, although none of the COPD patients showed symptoms indicative of lung cancer at baseline, the researchers noted.

However, the results suggest that eNose technology can identify lung cancer-specific VOC patterns early in cancer development in COPD patients, which provides a possible opportunity for early intervention, they concluded.

The study received no outside funding. De Vries disclosed personal fees and a substantial interest in the start-up company Breathomix.

A version of this article first appeared on Medscape.com.

An electronic exhaled breath analyzer showed differences in breath profiles of patients with chronic obstructive pulmonary disease who did and did not develop lung cancer, based on data from a prospective study of approximately 800 individuals.

Lung cancer remains a major cause of death in patients with chronic obstructive pulmonary disease (COPD), but many cases may go undetected in the early stage because of lack of screening and lack of validated predictive biomarkers, wrote Rianne de Vries, PhD, of the University of Amsterdam, and colleagues.

Accurate, noninvasive tests to screen patients with COPD for lung cancer are needed, and molecular profiling of exhaled breath using electronic nose (eNose) technology has shown potential as a method of early detection by identifying patterns of exhaled volatile organic compounds (VOCs), they said.

In a study published in the journal Chest, the researchers reviewed data from 682 adults with COPD and 211 with lung cancer who were enrolled in BreathCloud, a multicenter, observational study of healthy controls and individuals with suspected or confirmed diagnosis of asthma, COPD, or lung cancer.

Patients’ breath profiles were collected at study enrollment, between May 2017 and November 2018, using a metal oxide semiconductor eNose (SpiroNose).

Data from the eNose included the highest sensor peak normalized to the most stable sensor and the ratio between sensor peak and breath hold point. These variables were combined into four principal components (PCs) that captured 78.4% of variance in the dataset, and training and validation sets were constructed for all subjects. The researchers calculated a receiver operating characteristic (ROC) curve, including the area under the curve (AUC).

All patients were treated with standard clinical care and were monitored for development of clinically diagnosed lung cancer for 2 years, confirmed via CT imaging. The mean age of the patients was 64 years, and demographics at baseline were similar for patients with and without lung cancer.

After exclusion of 116 patients with both COPD and lung cancer, the analysis showed an accuracy of 90% and a ROC-AUC of 0.95.

Within 2 years of study enrollment, 37 patients with COPD (5.4%) developed lung cancer. In training sets and validation sets, the principal components one, two, and three were significantly different in patients with COPD who developed lung cancer and those who did not, (P = .002, P < .001, P < .001, respectively). The ROC-AUCs of the testing and validation sets were 0.89 and 0.86, respectively.

“Interestingly, the VOC pattern associated with early development of lung cancer in COPD did not match to the pattern related to lung cancer stages, as the former was mainly captured by PC2 and the latter by PC3,” the researchers wrote in their discussion. “This suggests that early identification of upcoming clinically manifest lung cancer in patients with COPD by eNose is not driven by VOCs that are predominantly associated with a particular stage of the disease,” they said.

The findings were limited by several factors including the lack of CT scanning at baseline because of the real-world design, so the presence of any baseline tumors was unknown, although none of the COPD patients showed symptoms indicative of lung cancer at baseline, the researchers noted.

However, the results suggest that eNose technology can identify lung cancer-specific VOC patterns early in cancer development in COPD patients, which provides a possible opportunity for early intervention, they concluded.

The study received no outside funding. De Vries disclosed personal fees and a substantial interest in the start-up company Breathomix.

A version of this article first appeared on Medscape.com.

An electronic exhaled breath analyzer showed differences in breath profiles of patients with chronic obstructive pulmonary disease who did and did not develop lung cancer, based on data from a prospective study of approximately 800 individuals.

Lung cancer remains a major cause of death in patients with chronic obstructive pulmonary disease (COPD), but many cases may go undetected in the early stage because of lack of screening and lack of validated predictive biomarkers, wrote Rianne de Vries, PhD, of the University of Amsterdam, and colleagues.

Accurate, noninvasive tests to screen patients with COPD for lung cancer are needed, and molecular profiling of exhaled breath using electronic nose (eNose) technology has shown potential as a method of early detection by identifying patterns of exhaled volatile organic compounds (VOCs), they said.

In a study published in the journal Chest, the researchers reviewed data from 682 adults with COPD and 211 with lung cancer who were enrolled in BreathCloud, a multicenter, observational study of healthy controls and individuals with suspected or confirmed diagnosis of asthma, COPD, or lung cancer.

Patients’ breath profiles were collected at study enrollment, between May 2017 and November 2018, using a metal oxide semiconductor eNose (SpiroNose).

Data from the eNose included the highest sensor peak normalized to the most stable sensor and the ratio between sensor peak and breath hold point. These variables were combined into four principal components (PCs) that captured 78.4% of variance in the dataset, and training and validation sets were constructed for all subjects. The researchers calculated a receiver operating characteristic (ROC) curve, including the area under the curve (AUC).

All patients were treated with standard clinical care and were monitored for development of clinically diagnosed lung cancer for 2 years, confirmed via CT imaging. The mean age of the patients was 64 years, and demographics at baseline were similar for patients with and without lung cancer.

After exclusion of 116 patients with both COPD and lung cancer, the analysis showed an accuracy of 90% and a ROC-AUC of 0.95.

Within 2 years of study enrollment, 37 patients with COPD (5.4%) developed lung cancer. In training sets and validation sets, the principal components one, two, and three were significantly different in patients with COPD who developed lung cancer and those who did not, (P = .002, P < .001, P < .001, respectively). The ROC-AUCs of the testing and validation sets were 0.89 and 0.86, respectively.

“Interestingly, the VOC pattern associated with early development of lung cancer in COPD did not match to the pattern related to lung cancer stages, as the former was mainly captured by PC2 and the latter by PC3,” the researchers wrote in their discussion. “This suggests that early identification of upcoming clinically manifest lung cancer in patients with COPD by eNose is not driven by VOCs that are predominantly associated with a particular stage of the disease,” they said.

The findings were limited by several factors including the lack of CT scanning at baseline because of the real-world design, so the presence of any baseline tumors was unknown, although none of the COPD patients showed symptoms indicative of lung cancer at baseline, the researchers noted.

However, the results suggest that eNose technology can identify lung cancer-specific VOC patterns early in cancer development in COPD patients, which provides a possible opportunity for early intervention, they concluded.

The study received no outside funding. De Vries disclosed personal fees and a substantial interest in the start-up company Breathomix.

A version of this article first appeared on Medscape.com.