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Tic disorders proliferate in bipolar patients with OCD
Bipolar disorder patients with comorbid obsessive-compulsive disorder were significantly more likely to suffer from tic disorders, as well as hoarding, excoriation, and body dysmorphic disorder, than were those without comorbid OCD, data from 70 patients suggest.
Between 10% and 20% of patients with bipolar disorder (BD) also meet criteria for obsessive-compulsive disorder (OCD), and these patients are more likely to experience treatment resistance and poor prognosis than are BD patients without OCD. In addition, preliminary indications suggest a specific association between OCD and bipolar depression (BP-D) in particular, wrote Leonid Braverman, MD, of Ma’ale HaCarmel Mental Health Center, Tirat Carmel, Israel, and colleagues.
In addition, “there is compelling evidence indicating that OCD-spectrum and tic disorders share with OCD clinical characteristics, familial inheritance, neurobiological underpinnings and some aspects of pharmacotherapy,” and investigations into the clinical characteristics of OCD spectrum behaviors in BP-D patients with and without OCD are ongoing, they said.
In a study published in the Journal of Obsessive-Compulsive and Related Disorders (2021 Mar 21. doi: 10.1016/j.jocrd.2021.100643), the researchers reviewed data from 87 adults who met the DSM-5 criteria for BP-D. Of these, 27 also met criteria for OCD, 17 for subthreshold OCD, and 43 had neither OCD nor subthreshold OCD. The researchers compared the 27 OCD patients and the 43 non-OCD patients; the OCD patients had significantly higher rates overall of body dysmorphic disorder, hoarding disorder, excoriation disorder, and tic disorder, compared with non-OCD patients (P range from < .05-0.01 for all). No differences between the groups appeared for trichotillomania.
Also, the researchers found significant between-group differences in the number of patients with at least one OCD spectrum disorder and tic disorders (13 of 19 patients in the OCD group vs. 3 of 37 patients in the non-OCD group) and in the co-occurrence of two OCD-spectrum and tic disorders (3 of 19 patients in the OCD group vs. 1 patient in the non-OCD group).
The most common comorbid psychiatric disorders in both groups were substance use and combined anxiety disorders, followed by eating disorders, but no between-group differences were found in the frequencies of any of these conditions.
“From the clinical perspective, in BP-D patients,” the researchers noted.
The study findings were limited by several factors, including the small sample size, cross-sectional design, and exclusion of subsyndromic disorders, the researchers noted. However, the results support findings from previous studies, and the study emphasizes the clinical complexity and poor prognosis for these patients. Therefore, additional research is needed in patients with BP-D verse the manic/hypomanic phases of bipolar illness to determine similar patterns, they said. Medication trials are needed to address functional impairments in these patients, given the differences in treatment of BDD, hoarding, excoriation, and tic disorders, compared with “pure” OCD, they concluded.
The study received no outside funding. The researchers reported no financial conflicts.
Bipolar disorder patients with comorbid obsessive-compulsive disorder were significantly more likely to suffer from tic disorders, as well as hoarding, excoriation, and body dysmorphic disorder, than were those without comorbid OCD, data from 70 patients suggest.
Between 10% and 20% of patients with bipolar disorder (BD) also meet criteria for obsessive-compulsive disorder (OCD), and these patients are more likely to experience treatment resistance and poor prognosis than are BD patients without OCD. In addition, preliminary indications suggest a specific association between OCD and bipolar depression (BP-D) in particular, wrote Leonid Braverman, MD, of Ma’ale HaCarmel Mental Health Center, Tirat Carmel, Israel, and colleagues.
In addition, “there is compelling evidence indicating that OCD-spectrum and tic disorders share with OCD clinical characteristics, familial inheritance, neurobiological underpinnings and some aspects of pharmacotherapy,” and investigations into the clinical characteristics of OCD spectrum behaviors in BP-D patients with and without OCD are ongoing, they said.
In a study published in the Journal of Obsessive-Compulsive and Related Disorders (2021 Mar 21. doi: 10.1016/j.jocrd.2021.100643), the researchers reviewed data from 87 adults who met the DSM-5 criteria for BP-D. Of these, 27 also met criteria for OCD, 17 for subthreshold OCD, and 43 had neither OCD nor subthreshold OCD. The researchers compared the 27 OCD patients and the 43 non-OCD patients; the OCD patients had significantly higher rates overall of body dysmorphic disorder, hoarding disorder, excoriation disorder, and tic disorder, compared with non-OCD patients (P range from < .05-0.01 for all). No differences between the groups appeared for trichotillomania.
Also, the researchers found significant between-group differences in the number of patients with at least one OCD spectrum disorder and tic disorders (13 of 19 patients in the OCD group vs. 3 of 37 patients in the non-OCD group) and in the co-occurrence of two OCD-spectrum and tic disorders (3 of 19 patients in the OCD group vs. 1 patient in the non-OCD group).
The most common comorbid psychiatric disorders in both groups were substance use and combined anxiety disorders, followed by eating disorders, but no between-group differences were found in the frequencies of any of these conditions.
“From the clinical perspective, in BP-D patients,” the researchers noted.
The study findings were limited by several factors, including the small sample size, cross-sectional design, and exclusion of subsyndromic disorders, the researchers noted. However, the results support findings from previous studies, and the study emphasizes the clinical complexity and poor prognosis for these patients. Therefore, additional research is needed in patients with BP-D verse the manic/hypomanic phases of bipolar illness to determine similar patterns, they said. Medication trials are needed to address functional impairments in these patients, given the differences in treatment of BDD, hoarding, excoriation, and tic disorders, compared with “pure” OCD, they concluded.
The study received no outside funding. The researchers reported no financial conflicts.
Bipolar disorder patients with comorbid obsessive-compulsive disorder were significantly more likely to suffer from tic disorders, as well as hoarding, excoriation, and body dysmorphic disorder, than were those without comorbid OCD, data from 70 patients suggest.
Between 10% and 20% of patients with bipolar disorder (BD) also meet criteria for obsessive-compulsive disorder (OCD), and these patients are more likely to experience treatment resistance and poor prognosis than are BD patients without OCD. In addition, preliminary indications suggest a specific association between OCD and bipolar depression (BP-D) in particular, wrote Leonid Braverman, MD, of Ma’ale HaCarmel Mental Health Center, Tirat Carmel, Israel, and colleagues.
In addition, “there is compelling evidence indicating that OCD-spectrum and tic disorders share with OCD clinical characteristics, familial inheritance, neurobiological underpinnings and some aspects of pharmacotherapy,” and investigations into the clinical characteristics of OCD spectrum behaviors in BP-D patients with and without OCD are ongoing, they said.
In a study published in the Journal of Obsessive-Compulsive and Related Disorders (2021 Mar 21. doi: 10.1016/j.jocrd.2021.100643), the researchers reviewed data from 87 adults who met the DSM-5 criteria for BP-D. Of these, 27 also met criteria for OCD, 17 for subthreshold OCD, and 43 had neither OCD nor subthreshold OCD. The researchers compared the 27 OCD patients and the 43 non-OCD patients; the OCD patients had significantly higher rates overall of body dysmorphic disorder, hoarding disorder, excoriation disorder, and tic disorder, compared with non-OCD patients (P range from < .05-0.01 for all). No differences between the groups appeared for trichotillomania.
Also, the researchers found significant between-group differences in the number of patients with at least one OCD spectrum disorder and tic disorders (13 of 19 patients in the OCD group vs. 3 of 37 patients in the non-OCD group) and in the co-occurrence of two OCD-spectrum and tic disorders (3 of 19 patients in the OCD group vs. 1 patient in the non-OCD group).
The most common comorbid psychiatric disorders in both groups were substance use and combined anxiety disorders, followed by eating disorders, but no between-group differences were found in the frequencies of any of these conditions.
“From the clinical perspective, in BP-D patients,” the researchers noted.
The study findings were limited by several factors, including the small sample size, cross-sectional design, and exclusion of subsyndromic disorders, the researchers noted. However, the results support findings from previous studies, and the study emphasizes the clinical complexity and poor prognosis for these patients. Therefore, additional research is needed in patients with BP-D verse the manic/hypomanic phases of bipolar illness to determine similar patterns, they said. Medication trials are needed to address functional impairments in these patients, given the differences in treatment of BDD, hoarding, excoriation, and tic disorders, compared with “pure” OCD, they concluded.
The study received no outside funding. The researchers reported no financial conflicts.
FROM THE JOURNAL OF OBSESSIVE-COMPULSIVE AND RELATED DISORDERS
Watch for abnormal movements in hospitalized COVID-19 patients
Myoclonus was diagnosed in about half of hospitalized COVID-19 patients who were evaluated for movement disorders, data from 50 cases show.
Abnormal movements often occur as complications from critical illness, and neurologic consultation can determine whether patients have experienced a seizure or stroke. However, restriction of bedside assessment in the wake of the COVID-19 pandemic increases the risk that abnormal movements will be missed, Jeffrey R. Clark and Eric M. Liotta, MD, of Northwestern University, Chicago, and colleagues wrote.
“Given the limited reports of abnormal movements in hospitalized COVID-19 patients and increased recognition of neurologic manifestations of COVID-19, we sought to examine the frequency and etiology of this finding as an indication of neurologic consultation,” they said.
In a study published in the Journal of the Neurological Sciences, the researchers reviewed data from the first 50 consecutive patients with COVID-19 symptoms who were hospitalized at a single center and underwent neurologic consultation between March 17, 2020, and May 18, 2020.
Overall, 11 patients (22.0%) of patients experienced abnormal movement, and all were admitted to the ICU within 7 days of meeting criteria for severe COVID-19. These patients included nine men and two women with an age range of 36-78 years. The most common comorbidities were obesity, hypertension, diabetes, chronic kidney disease, and coronary artery disease.
Myoclonus (generalized and focal) was the most common abnormal movement, and present in 6 of the 11 patients. Three cases were attributed to high-intensity sedation, and three to toxic-metabolic disturbances. In two patients, abnormal movements were attributed to focal seizures in the setting of encephalopathy, with focal facial twitching. An additional two patients experienced tremors; one showed an acute subdural hemorrhage on CT imaging. The second patient showed no sign of stroke or other abnormality on MRI and the tremor improved during the hospital stay. One patient who experienced abnormal high-amplitude nonrhythmic movements of the lower extremities was diagnosed with serotonin syndrome that resolved after discontinuing high-dose fentanyl.
The study findings were limited by several factors, including the small study population and limited availability of MRI, the researchers noted. Assessing severe COVID-19 cases in the ICU setting presents a challenge because of limited patient participation and the potentially confounding effects of sedation and mechanical ventilation.
However, the researchers said.
“A heightened awareness of abnormal eye movements, or subtle facial tremoring, may be the first steps in recognizing potentially dangerous neurologic manifestations,” and clinicians caring for patients with severe COVID-19 should be able to recognize abnormal movements and seek neurologic consultation when indicated, they emphasized.
The study was supported in part by grants to coauthors Nicholas J. Reish, MD, and Dr. Liotta from the National Institutes of Health. The researchers had no financial conflicts to disclose.
Myoclonus was diagnosed in about half of hospitalized COVID-19 patients who were evaluated for movement disorders, data from 50 cases show.
Abnormal movements often occur as complications from critical illness, and neurologic consultation can determine whether patients have experienced a seizure or stroke. However, restriction of bedside assessment in the wake of the COVID-19 pandemic increases the risk that abnormal movements will be missed, Jeffrey R. Clark and Eric M. Liotta, MD, of Northwestern University, Chicago, and colleagues wrote.
“Given the limited reports of abnormal movements in hospitalized COVID-19 patients and increased recognition of neurologic manifestations of COVID-19, we sought to examine the frequency and etiology of this finding as an indication of neurologic consultation,” they said.
In a study published in the Journal of the Neurological Sciences, the researchers reviewed data from the first 50 consecutive patients with COVID-19 symptoms who were hospitalized at a single center and underwent neurologic consultation between March 17, 2020, and May 18, 2020.
Overall, 11 patients (22.0%) of patients experienced abnormal movement, and all were admitted to the ICU within 7 days of meeting criteria for severe COVID-19. These patients included nine men and two women with an age range of 36-78 years. The most common comorbidities were obesity, hypertension, diabetes, chronic kidney disease, and coronary artery disease.
Myoclonus (generalized and focal) was the most common abnormal movement, and present in 6 of the 11 patients. Three cases were attributed to high-intensity sedation, and three to toxic-metabolic disturbances. In two patients, abnormal movements were attributed to focal seizures in the setting of encephalopathy, with focal facial twitching. An additional two patients experienced tremors; one showed an acute subdural hemorrhage on CT imaging. The second patient showed no sign of stroke or other abnormality on MRI and the tremor improved during the hospital stay. One patient who experienced abnormal high-amplitude nonrhythmic movements of the lower extremities was diagnosed with serotonin syndrome that resolved after discontinuing high-dose fentanyl.
The study findings were limited by several factors, including the small study population and limited availability of MRI, the researchers noted. Assessing severe COVID-19 cases in the ICU setting presents a challenge because of limited patient participation and the potentially confounding effects of sedation and mechanical ventilation.
However, the researchers said.
“A heightened awareness of abnormal eye movements, or subtle facial tremoring, may be the first steps in recognizing potentially dangerous neurologic manifestations,” and clinicians caring for patients with severe COVID-19 should be able to recognize abnormal movements and seek neurologic consultation when indicated, they emphasized.
The study was supported in part by grants to coauthors Nicholas J. Reish, MD, and Dr. Liotta from the National Institutes of Health. The researchers had no financial conflicts to disclose.
Myoclonus was diagnosed in about half of hospitalized COVID-19 patients who were evaluated for movement disorders, data from 50 cases show.
Abnormal movements often occur as complications from critical illness, and neurologic consultation can determine whether patients have experienced a seizure or stroke. However, restriction of bedside assessment in the wake of the COVID-19 pandemic increases the risk that abnormal movements will be missed, Jeffrey R. Clark and Eric M. Liotta, MD, of Northwestern University, Chicago, and colleagues wrote.
“Given the limited reports of abnormal movements in hospitalized COVID-19 patients and increased recognition of neurologic manifestations of COVID-19, we sought to examine the frequency and etiology of this finding as an indication of neurologic consultation,” they said.
In a study published in the Journal of the Neurological Sciences, the researchers reviewed data from the first 50 consecutive patients with COVID-19 symptoms who were hospitalized at a single center and underwent neurologic consultation between March 17, 2020, and May 18, 2020.
Overall, 11 patients (22.0%) of patients experienced abnormal movement, and all were admitted to the ICU within 7 days of meeting criteria for severe COVID-19. These patients included nine men and two women with an age range of 36-78 years. The most common comorbidities were obesity, hypertension, diabetes, chronic kidney disease, and coronary artery disease.
Myoclonus (generalized and focal) was the most common abnormal movement, and present in 6 of the 11 patients. Three cases were attributed to high-intensity sedation, and three to toxic-metabolic disturbances. In two patients, abnormal movements were attributed to focal seizures in the setting of encephalopathy, with focal facial twitching. An additional two patients experienced tremors; one showed an acute subdural hemorrhage on CT imaging. The second patient showed no sign of stroke or other abnormality on MRI and the tremor improved during the hospital stay. One patient who experienced abnormal high-amplitude nonrhythmic movements of the lower extremities was diagnosed with serotonin syndrome that resolved after discontinuing high-dose fentanyl.
The study findings were limited by several factors, including the small study population and limited availability of MRI, the researchers noted. Assessing severe COVID-19 cases in the ICU setting presents a challenge because of limited patient participation and the potentially confounding effects of sedation and mechanical ventilation.
However, the researchers said.
“A heightened awareness of abnormal eye movements, or subtle facial tremoring, may be the first steps in recognizing potentially dangerous neurologic manifestations,” and clinicians caring for patients with severe COVID-19 should be able to recognize abnormal movements and seek neurologic consultation when indicated, they emphasized.
The study was supported in part by grants to coauthors Nicholas J. Reish, MD, and Dr. Liotta from the National Institutes of Health. The researchers had no financial conflicts to disclose.
FROM THE JOURNAL OF THE NEUROLOGICAL SCIENCES
Can exercise prevent cognitive decline in patients with early Parkinson’s disease?
, new research suggests. Investigators found that patients with Parkinson’s disease who were APOE epsilon4 carriers had greater cognitive decline compared with non-APOE epsilon4 carriers, but the findings also revealed higher physical activity appeared to slow cognitive decline in this higher risk group.
“The main finding of the current study is that higher physical activity was related to slower APOE epsilon4-associated cognitive decline in patients with early Parkinson’s disease, which was shown to be robust in sensitivity analyses,” wrote the researchers, led by Ryul Kim, MD, Inha University Hospital, Incheon, Korea.
The study was published online March 31 in Neurology.
Unclear mechanism
The APOE epsilon4 allele is known to be a “major risk factor” for Alzheimer’s disease, but “accumulating evidence shows that this allele also has a potential role in cognitive impairment in Parkinson’s disease,” the authors noted.
Previous research shows physical activity has beneficial effects in patients with Parkinson’s disease, but the mechanisms underlying these effects are “not well understood.” Additional data suggest physical activity modifies the APOE epsilon4 effect on the development and progression of Alzheimer’s disease.
“These observations led us to hypothesize that physical activity also plays a role in modulating the association between APOE [epsilon4] and cognition in Parkinson’s disease,” but no studies have yet reported on this interaction in patients with Parkinson’s disease, the authors noted.
To investigate, they drew on data from the Parkinson’s Progression Markers Initiative (PPMI) – a cohort study conducted to identify Parkinson’s disease progression markers.
The current analysis included 173 patients recently diagnosed with Parkinson’s disease but not yet treated for the condition. The cohort’s mean age was 63.3 ± 10.0 years, age of Parkinson’s disease onset was 59.4 ± 10.0 years, and 68% were male. Of these participants, 46 were APOE epsilon4 carriers.
Dopamine transporter (DAT) activity was assessed using imaging at enrollment and again at years 2 and 4. Cognitive function was assessed at years 2, 3, and 4 using the Montreal Cognitive Assessment (MoCA) test.
Protective effect
Although APOE epsilon4 carriers tended to be younger than noncarriers, the age of Parkinson’s disease onset did not differ between the 2 groups, and there were also no significant differences between the groups in demographic and clinical variables.
There were larger declines in MoCA scores in the APOE epsilon4 carriers versus the noncarriers (0.21 ± 1.40 and 0.08 ± 1.15 respectively).
The APOE epsilon4 allele was associated with a “steeper” rate of cognitive decline, compared with the non-APOE epsilon4 allele (estimate −1.33 [95% confidence interval, −2.12 to −0.47, P = .002).
There was a significant interaction of physical activity, APOE epsilon4, and time: Higher physical activity was associated with slower APOE epsilon4-related cognitive decline (estimate 0.007 [0.003 to 0.011, P = .001).
However, the researchers found no significant main effects of the APOE epsilon4 allele or physical activity on the change in the MoCA score.
“Considering that dopaminergic treatment may affect cognitive function, particularly in the early stage of Parkinson’s disease, we additionally included the levodopa daily equivalent dose (LEDD) and its interaction with time as covariates in the model,” the investigators noted.
They found that the interactive association between physical activity and the APOE epsilon4 allele on cognitive decline remained significant, even when participants who had normal cognitive performance at year 2 were included in the study population or when LEDD variables were included as covariates in the model.
Both high- and low-intensity exercise were significantly associated with slower APOE epsilon4-related cognitive decline.
There was no significant interaction between physical activity and APOE epsilon4 with changes in striatal DAT activities.
“Increased physical activity attenuated APOE epsilon4-related vulnerability to early cognitive decline in patients with Parkinson’s disease,” the authors noted, adding that the effect “did not appear to be mediated by striatal dopamine activity.”
They hypothesized that physical activity may “offer a greater protective effect” on cerebral amyloid accumulation in APOE epsilon4 carriers. It is also possible that physical activity will counteract the negative impact of the APOE epsilon4 allele through improved brain mechanism and decreased neuroinflammation.
‘The next blockbuster drug’
Commenting on the study in an interview, Bastiaan R. Bloem, MD, PhD, director of the center of expertise for Parkinson & movement disorders, Radboud University Medical Center, Nijmegen, Netherlands, said exercise might be seen as “the next blockbuster drug.”
Dr. Bloem, who was not involved in the study, noted there is “quite robust evidence now that exercise acts as symptomatic therapy, like a drug, alleviating sleep [disturbances], depression, constipation, and motor symptoms.”
The study “sheds new light on the idea of exercise as not only alleviating symptoms but actually as a potential disease modifier,” said Dr. Bloem, whose research has focused on the beneficial effects of a rigorous exercise program, combined with tablet-based gamificaton and a reward system in stabilizing motor symptoms in patients with Parkinson’s disease over time.
“The reward system created additional motivation for the patients with Parkinson’s disease who often experience depression and apathy that interfere with motivation,” he said.
The current study has important take-home messages for practicing clinicians. “Physicians should encourage exercise in patients, and patients should also take the lead themselves,” Dr. Bloem said. “It doesn’t matter what type of exercise you do, but it should have an aerobic component, should be safe so the patient doesn’t fall down, should have enough intensity to cause the patient to pant, and should be individualized and enjoyable so the patients stick to it,” he emphasized.
Dr. Bloem noted that yoga and mindfulness are also helpful. “If we’ve learned anything from the COVID-19 crisis, it’s that chronic stress is deleterious to all of us and particularly bad for people with PD, because you need dopamine to be able to handle stress, and the lack of dopamine in people with PD makes them deteriorate faster.”
The study was supported by a research grant of National Research Foundation by the Ministry of Science and ICT (MSIT) in Korea. The authors and Dr. Bloem have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
, new research suggests. Investigators found that patients with Parkinson’s disease who were APOE epsilon4 carriers had greater cognitive decline compared with non-APOE epsilon4 carriers, but the findings also revealed higher physical activity appeared to slow cognitive decline in this higher risk group.
“The main finding of the current study is that higher physical activity was related to slower APOE epsilon4-associated cognitive decline in patients with early Parkinson’s disease, which was shown to be robust in sensitivity analyses,” wrote the researchers, led by Ryul Kim, MD, Inha University Hospital, Incheon, Korea.
The study was published online March 31 in Neurology.
Unclear mechanism
The APOE epsilon4 allele is known to be a “major risk factor” for Alzheimer’s disease, but “accumulating evidence shows that this allele also has a potential role in cognitive impairment in Parkinson’s disease,” the authors noted.
Previous research shows physical activity has beneficial effects in patients with Parkinson’s disease, but the mechanisms underlying these effects are “not well understood.” Additional data suggest physical activity modifies the APOE epsilon4 effect on the development and progression of Alzheimer’s disease.
“These observations led us to hypothesize that physical activity also plays a role in modulating the association between APOE [epsilon4] and cognition in Parkinson’s disease,” but no studies have yet reported on this interaction in patients with Parkinson’s disease, the authors noted.
To investigate, they drew on data from the Parkinson’s Progression Markers Initiative (PPMI) – a cohort study conducted to identify Parkinson’s disease progression markers.
The current analysis included 173 patients recently diagnosed with Parkinson’s disease but not yet treated for the condition. The cohort’s mean age was 63.3 ± 10.0 years, age of Parkinson’s disease onset was 59.4 ± 10.0 years, and 68% were male. Of these participants, 46 were APOE epsilon4 carriers.
Dopamine transporter (DAT) activity was assessed using imaging at enrollment and again at years 2 and 4. Cognitive function was assessed at years 2, 3, and 4 using the Montreal Cognitive Assessment (MoCA) test.
Protective effect
Although APOE epsilon4 carriers tended to be younger than noncarriers, the age of Parkinson’s disease onset did not differ between the 2 groups, and there were also no significant differences between the groups in demographic and clinical variables.
There were larger declines in MoCA scores in the APOE epsilon4 carriers versus the noncarriers (0.21 ± 1.40 and 0.08 ± 1.15 respectively).
The APOE epsilon4 allele was associated with a “steeper” rate of cognitive decline, compared with the non-APOE epsilon4 allele (estimate −1.33 [95% confidence interval, −2.12 to −0.47, P = .002).
There was a significant interaction of physical activity, APOE epsilon4, and time: Higher physical activity was associated with slower APOE epsilon4-related cognitive decline (estimate 0.007 [0.003 to 0.011, P = .001).
However, the researchers found no significant main effects of the APOE epsilon4 allele or physical activity on the change in the MoCA score.
“Considering that dopaminergic treatment may affect cognitive function, particularly in the early stage of Parkinson’s disease, we additionally included the levodopa daily equivalent dose (LEDD) and its interaction with time as covariates in the model,” the investigators noted.
They found that the interactive association between physical activity and the APOE epsilon4 allele on cognitive decline remained significant, even when participants who had normal cognitive performance at year 2 were included in the study population or when LEDD variables were included as covariates in the model.
Both high- and low-intensity exercise were significantly associated with slower APOE epsilon4-related cognitive decline.
There was no significant interaction between physical activity and APOE epsilon4 with changes in striatal DAT activities.
“Increased physical activity attenuated APOE epsilon4-related vulnerability to early cognitive decline in patients with Parkinson’s disease,” the authors noted, adding that the effect “did not appear to be mediated by striatal dopamine activity.”
They hypothesized that physical activity may “offer a greater protective effect” on cerebral amyloid accumulation in APOE epsilon4 carriers. It is also possible that physical activity will counteract the negative impact of the APOE epsilon4 allele through improved brain mechanism and decreased neuroinflammation.
‘The next blockbuster drug’
Commenting on the study in an interview, Bastiaan R. Bloem, MD, PhD, director of the center of expertise for Parkinson & movement disorders, Radboud University Medical Center, Nijmegen, Netherlands, said exercise might be seen as “the next blockbuster drug.”
Dr. Bloem, who was not involved in the study, noted there is “quite robust evidence now that exercise acts as symptomatic therapy, like a drug, alleviating sleep [disturbances], depression, constipation, and motor symptoms.”
The study “sheds new light on the idea of exercise as not only alleviating symptoms but actually as a potential disease modifier,” said Dr. Bloem, whose research has focused on the beneficial effects of a rigorous exercise program, combined with tablet-based gamificaton and a reward system in stabilizing motor symptoms in patients with Parkinson’s disease over time.
“The reward system created additional motivation for the patients with Parkinson’s disease who often experience depression and apathy that interfere with motivation,” he said.
The current study has important take-home messages for practicing clinicians. “Physicians should encourage exercise in patients, and patients should also take the lead themselves,” Dr. Bloem said. “It doesn’t matter what type of exercise you do, but it should have an aerobic component, should be safe so the patient doesn’t fall down, should have enough intensity to cause the patient to pant, and should be individualized and enjoyable so the patients stick to it,” he emphasized.
Dr. Bloem noted that yoga and mindfulness are also helpful. “If we’ve learned anything from the COVID-19 crisis, it’s that chronic stress is deleterious to all of us and particularly bad for people with PD, because you need dopamine to be able to handle stress, and the lack of dopamine in people with PD makes them deteriorate faster.”
The study was supported by a research grant of National Research Foundation by the Ministry of Science and ICT (MSIT) in Korea. The authors and Dr. Bloem have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
, new research suggests. Investigators found that patients with Parkinson’s disease who were APOE epsilon4 carriers had greater cognitive decline compared with non-APOE epsilon4 carriers, but the findings also revealed higher physical activity appeared to slow cognitive decline in this higher risk group.
“The main finding of the current study is that higher physical activity was related to slower APOE epsilon4-associated cognitive decline in patients with early Parkinson’s disease, which was shown to be robust in sensitivity analyses,” wrote the researchers, led by Ryul Kim, MD, Inha University Hospital, Incheon, Korea.
The study was published online March 31 in Neurology.
Unclear mechanism
The APOE epsilon4 allele is known to be a “major risk factor” for Alzheimer’s disease, but “accumulating evidence shows that this allele also has a potential role in cognitive impairment in Parkinson’s disease,” the authors noted.
Previous research shows physical activity has beneficial effects in patients with Parkinson’s disease, but the mechanisms underlying these effects are “not well understood.” Additional data suggest physical activity modifies the APOE epsilon4 effect on the development and progression of Alzheimer’s disease.
“These observations led us to hypothesize that physical activity also plays a role in modulating the association between APOE [epsilon4] and cognition in Parkinson’s disease,” but no studies have yet reported on this interaction in patients with Parkinson’s disease, the authors noted.
To investigate, they drew on data from the Parkinson’s Progression Markers Initiative (PPMI) – a cohort study conducted to identify Parkinson’s disease progression markers.
The current analysis included 173 patients recently diagnosed with Parkinson’s disease but not yet treated for the condition. The cohort’s mean age was 63.3 ± 10.0 years, age of Parkinson’s disease onset was 59.4 ± 10.0 years, and 68% were male. Of these participants, 46 were APOE epsilon4 carriers.
Dopamine transporter (DAT) activity was assessed using imaging at enrollment and again at years 2 and 4. Cognitive function was assessed at years 2, 3, and 4 using the Montreal Cognitive Assessment (MoCA) test.
Protective effect
Although APOE epsilon4 carriers tended to be younger than noncarriers, the age of Parkinson’s disease onset did not differ between the 2 groups, and there were also no significant differences between the groups in demographic and clinical variables.
There were larger declines in MoCA scores in the APOE epsilon4 carriers versus the noncarriers (0.21 ± 1.40 and 0.08 ± 1.15 respectively).
The APOE epsilon4 allele was associated with a “steeper” rate of cognitive decline, compared with the non-APOE epsilon4 allele (estimate −1.33 [95% confidence interval, −2.12 to −0.47, P = .002).
There was a significant interaction of physical activity, APOE epsilon4, and time: Higher physical activity was associated with slower APOE epsilon4-related cognitive decline (estimate 0.007 [0.003 to 0.011, P = .001).
However, the researchers found no significant main effects of the APOE epsilon4 allele or physical activity on the change in the MoCA score.
“Considering that dopaminergic treatment may affect cognitive function, particularly in the early stage of Parkinson’s disease, we additionally included the levodopa daily equivalent dose (LEDD) and its interaction with time as covariates in the model,” the investigators noted.
They found that the interactive association between physical activity and the APOE epsilon4 allele on cognitive decline remained significant, even when participants who had normal cognitive performance at year 2 were included in the study population or when LEDD variables were included as covariates in the model.
Both high- and low-intensity exercise were significantly associated with slower APOE epsilon4-related cognitive decline.
There was no significant interaction between physical activity and APOE epsilon4 with changes in striatal DAT activities.
“Increased physical activity attenuated APOE epsilon4-related vulnerability to early cognitive decline in patients with Parkinson’s disease,” the authors noted, adding that the effect “did not appear to be mediated by striatal dopamine activity.”
They hypothesized that physical activity may “offer a greater protective effect” on cerebral amyloid accumulation in APOE epsilon4 carriers. It is also possible that physical activity will counteract the negative impact of the APOE epsilon4 allele through improved brain mechanism and decreased neuroinflammation.
‘The next blockbuster drug’
Commenting on the study in an interview, Bastiaan R. Bloem, MD, PhD, director of the center of expertise for Parkinson & movement disorders, Radboud University Medical Center, Nijmegen, Netherlands, said exercise might be seen as “the next blockbuster drug.”
Dr. Bloem, who was not involved in the study, noted there is “quite robust evidence now that exercise acts as symptomatic therapy, like a drug, alleviating sleep [disturbances], depression, constipation, and motor symptoms.”
The study “sheds new light on the idea of exercise as not only alleviating symptoms but actually as a potential disease modifier,” said Dr. Bloem, whose research has focused on the beneficial effects of a rigorous exercise program, combined with tablet-based gamificaton and a reward system in stabilizing motor symptoms in patients with Parkinson’s disease over time.
“The reward system created additional motivation for the patients with Parkinson’s disease who often experience depression and apathy that interfere with motivation,” he said.
The current study has important take-home messages for practicing clinicians. “Physicians should encourage exercise in patients, and patients should also take the lead themselves,” Dr. Bloem said. “It doesn’t matter what type of exercise you do, but it should have an aerobic component, should be safe so the patient doesn’t fall down, should have enough intensity to cause the patient to pant, and should be individualized and enjoyable so the patients stick to it,” he emphasized.
Dr. Bloem noted that yoga and mindfulness are also helpful. “If we’ve learned anything from the COVID-19 crisis, it’s that chronic stress is deleterious to all of us and particularly bad for people with PD, because you need dopamine to be able to handle stress, and the lack of dopamine in people with PD makes them deteriorate faster.”
The study was supported by a research grant of National Research Foundation by the Ministry of Science and ICT (MSIT) in Korea. The authors and Dr. Bloem have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM NEUROLOGY
Type 2 diabetes linked to increased risk for Parkinson’s
New analyses of both observational and genetic data have provided “convincing evidence” that type 2 diabetes is associated with an increased risk for Parkinson’s disease.
“The fact that we see the same effects in both types of analysis separately makes it more likely that these results are real – that type 2 diabetes really is a driver of Parkinson’s disease risk,” Alastair Noyce, PhD, senior author of the new studies, said in an interview.
The two analyses are reported in one paper published online March 8 in the journal Movement Disorders.
Dr. Noyce, clinical senior lecturer in the preventive neurology unit at the Wolfson Institute of Preventive Medicine, Queen Mary University of London, explained that his group is interested in risk factors for Parkinson’s disease, particularly those relevant at the population level and which might be modifiable.
“Several studies have looked at diabetes as a risk factor for Parkinson’s but very few have focused on type 2 diabetes, and, as this is such a growing health issue, we wanted to look at that in more detail,” he said.
The researchers performed two different analyses: a meta-analysis of observational studies investigating an association between type 2 diabetes and Parkinson’s; and a separate Mendelian randomization analysis of genetic data on the two conditions.
They found similar results in both studies, with the observational data suggesting type 2 diabetes was associated with a 21% increased risk for Parkinson’s disease and the genetic data suggesting an 8% increased risk. There were also hints that type 2 diabetes might also be associated with faster progression of Parkinson’s symptoms.
“I don’t think type 2 diabetes is a major cause of Parkinson’s, but it probably makes some contribution and may increase the risk of a more aggressive form of the condition,” Dr. Noyce said.
“I would say the increased risk of Parkinson’s disease attributable to type 2 diabetes may be similar to that of head injury or pesticide exposure, but it is important, as type 2 diabetes is very prevalent and is increasing,” he added. “As we see the growth in type 2 diabetes, this could lead to a later increase in Parkinson’s, which is already one of the fastest-growing diseases worldwide.”
For the meta-analysis of observational data, the researchers included nine studies that investigated preceding type 2 diabetes specifically and its effect on the risk for Parkinson’s disease and progression.
The pooled effect estimates showed that type 2 diabetes was associated with an increased risk for Parkinson’s disease (odds ratio, 1.21; 95% confidence interval, 1.07-1.36), and there was some evidence that type 2 diabetes was associated with faster progression of motor symptoms (standardized mean difference [SMD], 0.55) and cognitive decline (SMD, −0.92).
The observational meta-analysis included seven cohort studies and two case-control studies, and these different types of studies showed different results in regard to the association between diabetes and Parkinson’s. While the cohort studies showed a detrimental effect of diabetes on Parkinson’s risk (OR, 1.29), the case-control studies suggested protective effect (OR, 0.51).
Addressing this, Dr. Noyce noted that the case-control studies may be less reliable as they suffered more from survivor bias. “Diabetes may cause deaths in mid-life before people go on to develop Parkinson’s, and this would cause a protective effect to be seen, but we believe this to be a spurious result. Cohort studies are generally more reliable and are less susceptible to survivor bias,” he said.
For the genetic analysis, the researchers combined results from two large publicly available genome-wide association studies – one for type 2 diabetes and one for Parkinson’s disease to assess whether individuals with a genetic tendency to type 2 diabetes had a higher risk of developing Parkinson’s.
Results showed an increased risk for Parkinson’s in those individuals with genetic variants associated with type 2 diabetes, with an odds ratio of 1.08 (P = .010). There was also some evidence of an effect on motor progression (OR, 1.10; P = .032) but not on cognitive progression.
On the possible mechanism behind this observation, Dr. Noyce noted type 2 diabetes and Parkinson’s have some similarities in biology, including abnormal protein aggregation.
In the study, the authors also suggest that circulating insulin may have a neuroprotective role, whereas systemic and local insulin resistance can influence pathways known to be important in Parkinson’s pathogenesis, including those that relate to mitochondrial dysfunction, neuroinflammation, synaptic plasticity, and mitochondrial dysfunction.
Dr. Noyce further pointed out that several drugs used for the treatment of type 2 diabetes have been repurposed as possible treatments for Parkinson’s disease and are now being tested for this new indication. “Our results support that approach and raise the idea that some of these drugs may even prevent Parkinson’s in people at risk,” he said.
Most people who have type 2 diabetes won’t get Parkinson’s disease, he added. Other outcomes such as heart disease, kidney disease, and microvascular complications are far more likely, and the main aim of preventing and treating type 2 diabetes is to prevent these far more common outcomes. “But our data suggests that this could also have a possible benefit in reducing future Parkinson’s risk,” he said.
Not on the horizon at present is the possibility of screening patients with type 2 diabetes for signs of early Parkinson’s, Dr. Noyce said.
“There isn’t a test for identifying presymptomatic neurodegenerative diseases such as Parkinson’s yet, but perhaps in the future there will be, and type 2 diabetes may be one risk factor to take into account when considering such screening,” he added.
This work was financially supported by grants from The Michael J. Fox Foundation; the Canadian Consortium on Neurodegeneration in Aging (CCNA); the Canada First Research Excellence Fund (CFREF), awarded to McGill University for the Healthy Brains for Healthy Lives (HBHL) initiative; and Parkinson Canada, and the Intramural Research Program of the NIH, National Institute on Aging.
Dr. Noyce reports grants from the Barts Charity, Parkinson’s UK, Aligning Science Across Parkinson’s and Michael J. Fox Foundation, and the Virginia Keiley Benefaction; and personal fees/honoraria from Britannia, BIAL, AbbVie, Global Kinetics Corporation, Profile, Biogen, Roche, and UCB outside of the submitted work.
A version of this article first appeared on Medscape.com.
New analyses of both observational and genetic data have provided “convincing evidence” that type 2 diabetes is associated with an increased risk for Parkinson’s disease.
“The fact that we see the same effects in both types of analysis separately makes it more likely that these results are real – that type 2 diabetes really is a driver of Parkinson’s disease risk,” Alastair Noyce, PhD, senior author of the new studies, said in an interview.
The two analyses are reported in one paper published online March 8 in the journal Movement Disorders.
Dr. Noyce, clinical senior lecturer in the preventive neurology unit at the Wolfson Institute of Preventive Medicine, Queen Mary University of London, explained that his group is interested in risk factors for Parkinson’s disease, particularly those relevant at the population level and which might be modifiable.
“Several studies have looked at diabetes as a risk factor for Parkinson’s but very few have focused on type 2 diabetes, and, as this is such a growing health issue, we wanted to look at that in more detail,” he said.
The researchers performed two different analyses: a meta-analysis of observational studies investigating an association between type 2 diabetes and Parkinson’s; and a separate Mendelian randomization analysis of genetic data on the two conditions.
They found similar results in both studies, with the observational data suggesting type 2 diabetes was associated with a 21% increased risk for Parkinson’s disease and the genetic data suggesting an 8% increased risk. There were also hints that type 2 diabetes might also be associated with faster progression of Parkinson’s symptoms.
“I don’t think type 2 diabetes is a major cause of Parkinson’s, but it probably makes some contribution and may increase the risk of a more aggressive form of the condition,” Dr. Noyce said.
“I would say the increased risk of Parkinson’s disease attributable to type 2 diabetes may be similar to that of head injury or pesticide exposure, but it is important, as type 2 diabetes is very prevalent and is increasing,” he added. “As we see the growth in type 2 diabetes, this could lead to a later increase in Parkinson’s, which is already one of the fastest-growing diseases worldwide.”
For the meta-analysis of observational data, the researchers included nine studies that investigated preceding type 2 diabetes specifically and its effect on the risk for Parkinson’s disease and progression.
The pooled effect estimates showed that type 2 diabetes was associated with an increased risk for Parkinson’s disease (odds ratio, 1.21; 95% confidence interval, 1.07-1.36), and there was some evidence that type 2 diabetes was associated with faster progression of motor symptoms (standardized mean difference [SMD], 0.55) and cognitive decline (SMD, −0.92).
The observational meta-analysis included seven cohort studies and two case-control studies, and these different types of studies showed different results in regard to the association between diabetes and Parkinson’s. While the cohort studies showed a detrimental effect of diabetes on Parkinson’s risk (OR, 1.29), the case-control studies suggested protective effect (OR, 0.51).
Addressing this, Dr. Noyce noted that the case-control studies may be less reliable as they suffered more from survivor bias. “Diabetes may cause deaths in mid-life before people go on to develop Parkinson’s, and this would cause a protective effect to be seen, but we believe this to be a spurious result. Cohort studies are generally more reliable and are less susceptible to survivor bias,” he said.
For the genetic analysis, the researchers combined results from two large publicly available genome-wide association studies – one for type 2 diabetes and one for Parkinson’s disease to assess whether individuals with a genetic tendency to type 2 diabetes had a higher risk of developing Parkinson’s.
Results showed an increased risk for Parkinson’s in those individuals with genetic variants associated with type 2 diabetes, with an odds ratio of 1.08 (P = .010). There was also some evidence of an effect on motor progression (OR, 1.10; P = .032) but not on cognitive progression.
On the possible mechanism behind this observation, Dr. Noyce noted type 2 diabetes and Parkinson’s have some similarities in biology, including abnormal protein aggregation.
In the study, the authors also suggest that circulating insulin may have a neuroprotective role, whereas systemic and local insulin resistance can influence pathways known to be important in Parkinson’s pathogenesis, including those that relate to mitochondrial dysfunction, neuroinflammation, synaptic plasticity, and mitochondrial dysfunction.
Dr. Noyce further pointed out that several drugs used for the treatment of type 2 diabetes have been repurposed as possible treatments for Parkinson’s disease and are now being tested for this new indication. “Our results support that approach and raise the idea that some of these drugs may even prevent Parkinson’s in people at risk,” he said.
Most people who have type 2 diabetes won’t get Parkinson’s disease, he added. Other outcomes such as heart disease, kidney disease, and microvascular complications are far more likely, and the main aim of preventing and treating type 2 diabetes is to prevent these far more common outcomes. “But our data suggests that this could also have a possible benefit in reducing future Parkinson’s risk,” he said.
Not on the horizon at present is the possibility of screening patients with type 2 diabetes for signs of early Parkinson’s, Dr. Noyce said.
“There isn’t a test for identifying presymptomatic neurodegenerative diseases such as Parkinson’s yet, but perhaps in the future there will be, and type 2 diabetes may be one risk factor to take into account when considering such screening,” he added.
This work was financially supported by grants from The Michael J. Fox Foundation; the Canadian Consortium on Neurodegeneration in Aging (CCNA); the Canada First Research Excellence Fund (CFREF), awarded to McGill University for the Healthy Brains for Healthy Lives (HBHL) initiative; and Parkinson Canada, and the Intramural Research Program of the NIH, National Institute on Aging.
Dr. Noyce reports grants from the Barts Charity, Parkinson’s UK, Aligning Science Across Parkinson’s and Michael J. Fox Foundation, and the Virginia Keiley Benefaction; and personal fees/honoraria from Britannia, BIAL, AbbVie, Global Kinetics Corporation, Profile, Biogen, Roche, and UCB outside of the submitted work.
A version of this article first appeared on Medscape.com.
New analyses of both observational and genetic data have provided “convincing evidence” that type 2 diabetes is associated with an increased risk for Parkinson’s disease.
“The fact that we see the same effects in both types of analysis separately makes it more likely that these results are real – that type 2 diabetes really is a driver of Parkinson’s disease risk,” Alastair Noyce, PhD, senior author of the new studies, said in an interview.
The two analyses are reported in one paper published online March 8 in the journal Movement Disorders.
Dr. Noyce, clinical senior lecturer in the preventive neurology unit at the Wolfson Institute of Preventive Medicine, Queen Mary University of London, explained that his group is interested in risk factors for Parkinson’s disease, particularly those relevant at the population level and which might be modifiable.
“Several studies have looked at diabetes as a risk factor for Parkinson’s but very few have focused on type 2 diabetes, and, as this is such a growing health issue, we wanted to look at that in more detail,” he said.
The researchers performed two different analyses: a meta-analysis of observational studies investigating an association between type 2 diabetes and Parkinson’s; and a separate Mendelian randomization analysis of genetic data on the two conditions.
They found similar results in both studies, with the observational data suggesting type 2 diabetes was associated with a 21% increased risk for Parkinson’s disease and the genetic data suggesting an 8% increased risk. There were also hints that type 2 diabetes might also be associated with faster progression of Parkinson’s symptoms.
“I don’t think type 2 diabetes is a major cause of Parkinson’s, but it probably makes some contribution and may increase the risk of a more aggressive form of the condition,” Dr. Noyce said.
“I would say the increased risk of Parkinson’s disease attributable to type 2 diabetes may be similar to that of head injury or pesticide exposure, but it is important, as type 2 diabetes is very prevalent and is increasing,” he added. “As we see the growth in type 2 diabetes, this could lead to a later increase in Parkinson’s, which is already one of the fastest-growing diseases worldwide.”
For the meta-analysis of observational data, the researchers included nine studies that investigated preceding type 2 diabetes specifically and its effect on the risk for Parkinson’s disease and progression.
The pooled effect estimates showed that type 2 diabetes was associated with an increased risk for Parkinson’s disease (odds ratio, 1.21; 95% confidence interval, 1.07-1.36), and there was some evidence that type 2 diabetes was associated with faster progression of motor symptoms (standardized mean difference [SMD], 0.55) and cognitive decline (SMD, −0.92).
The observational meta-analysis included seven cohort studies and two case-control studies, and these different types of studies showed different results in regard to the association between diabetes and Parkinson’s. While the cohort studies showed a detrimental effect of diabetes on Parkinson’s risk (OR, 1.29), the case-control studies suggested protective effect (OR, 0.51).
Addressing this, Dr. Noyce noted that the case-control studies may be less reliable as they suffered more from survivor bias. “Diabetes may cause deaths in mid-life before people go on to develop Parkinson’s, and this would cause a protective effect to be seen, but we believe this to be a spurious result. Cohort studies are generally more reliable and are less susceptible to survivor bias,” he said.
For the genetic analysis, the researchers combined results from two large publicly available genome-wide association studies – one for type 2 diabetes and one for Parkinson’s disease to assess whether individuals with a genetic tendency to type 2 diabetes had a higher risk of developing Parkinson’s.
Results showed an increased risk for Parkinson’s in those individuals with genetic variants associated with type 2 diabetes, with an odds ratio of 1.08 (P = .010). There was also some evidence of an effect on motor progression (OR, 1.10; P = .032) but not on cognitive progression.
On the possible mechanism behind this observation, Dr. Noyce noted type 2 diabetes and Parkinson’s have some similarities in biology, including abnormal protein aggregation.
In the study, the authors also suggest that circulating insulin may have a neuroprotective role, whereas systemic and local insulin resistance can influence pathways known to be important in Parkinson’s pathogenesis, including those that relate to mitochondrial dysfunction, neuroinflammation, synaptic plasticity, and mitochondrial dysfunction.
Dr. Noyce further pointed out that several drugs used for the treatment of type 2 diabetes have been repurposed as possible treatments for Parkinson’s disease and are now being tested for this new indication. “Our results support that approach and raise the idea that some of these drugs may even prevent Parkinson’s in people at risk,” he said.
Most people who have type 2 diabetes won’t get Parkinson’s disease, he added. Other outcomes such as heart disease, kidney disease, and microvascular complications are far more likely, and the main aim of preventing and treating type 2 diabetes is to prevent these far more common outcomes. “But our data suggests that this could also have a possible benefit in reducing future Parkinson’s risk,” he said.
Not on the horizon at present is the possibility of screening patients with type 2 diabetes for signs of early Parkinson’s, Dr. Noyce said.
“There isn’t a test for identifying presymptomatic neurodegenerative diseases such as Parkinson’s yet, but perhaps in the future there will be, and type 2 diabetes may be one risk factor to take into account when considering such screening,” he added.
This work was financially supported by grants from The Michael J. Fox Foundation; the Canadian Consortium on Neurodegeneration in Aging (CCNA); the Canada First Research Excellence Fund (CFREF), awarded to McGill University for the Healthy Brains for Healthy Lives (HBHL) initiative; and Parkinson Canada, and the Intramural Research Program of the NIH, National Institute on Aging.
Dr. Noyce reports grants from the Barts Charity, Parkinson’s UK, Aligning Science Across Parkinson’s and Michael J. Fox Foundation, and the Virginia Keiley Benefaction; and personal fees/honoraria from Britannia, BIAL, AbbVie, Global Kinetics Corporation, Profile, Biogen, Roche, and UCB outside of the submitted work.
A version of this article first appeared on Medscape.com.
Neurologic disorders ubiquitous and rising in the U.S.
, according to new findings derived from the 2017 Global Burden of Disease study.
The authors of the analysis, led by Valery Feigin, MD, PhD, of New Zealand’s National Institute for Stroke and Applied Neurosciences, and published in the February 2021 issue of JAMA Neurology, looked at prevalence, incidence, mortality, and disability-adjusted life years for 14 neurological disorders across 50 states between 1990 and 2017. The diseases included in the analysis were stroke, Alzheimer’s disease and other dementias, Parkinson’s disease, epilepsy, multiple sclerosis, motor neuron disease, headaches, traumatic brain injury, spinal cord injuries, brain and other nervous system cancers, meningitis, encephalitis, and tetanus.
Tracking the burden of neurologic diseases
Dr. Feigin and colleagues estimated that a full 60% of the U.S. population lives with one or more of these disorders, a figure much greater than previous estimates for neurological disease burden nationwide. Tension-type headache and migraine were the most prevalent in the analysis by Dr. Feigin and colleagues. During the study period, they found, prevalence, incidence, and disability burden of nearly all the included disorders increased, with the exception of brain and spinal cord injuries, meningitis, and encephalitis.
The researchers attributed most of the rise in noncommunicable neurological diseases to population aging. An age-standardized analysis found trends for stroke and Alzheimer’s disease and other dementias to be declining or flat. Age-standardized stroke incidence dropped by 16% from 1990 to 2017, while stroke mortality declined by nearly a third, and stroke disability by a quarter. Age-standardized incidence of Alzheimer’s disease and other dementias dropped by 12%, and their prevalence by 13%, during the study period, though dementia mortality and disability were seen increasing.
The authors surmised that the age-standardized declines in stroke and dementias could reflect that “primary prevention of these disorders are beginning to show an influence.” With dementia, which is linked to cognitive reserve and education, “improving educational levels of cohort reaching the age groups at greatest risk of disease may also be contributing to a modest decline over time,” Dr. Feigin and his colleagues wrote.
Parkinson’s disease and multiple sclerosis, meanwhile, were both seen rising in incidence, prevalence, and disability adjusted life years (DALYs) even with age-standardized figures. The United States saw comparatively more disability in 2017 from dementias, Parkinson’s disease, epilepsy, multiple sclerosis, motor neuron disease, and headache disorders, which together comprised 6.7% of DALYs, compared with 4.4% globally; these also accounted for a higher share of mortality in the U.S. than worldwide. The authors attributed at least some of the difference to better case ascertainment in the U.S.
Regional variations
The researchers also reported variations in disease burden by state and region. While previous studies have identified a “stroke belt” concentrated in North Carolina, South Carolina, and Georgia, the new findings point to stroke disability highest in Alabama, Arkansas, and Mississippi, and mortality highest in Alabama, Mississippi, and South Carolina. The researchers noted increases in dementia mortality in these states, “likely attributable to the reciprocal association between stroke and dementia.”
Northern states saw higher burdens of multiple sclerosis compared with the rest of the country, while eastern states had higher rates of Parkinson’s disease.
Such regional and state-by state variations, Dr. Feigin and colleagues wrote in their analysis, “may be associated with differences in the case ascertainment, as well as access to health care; racial/ethnic, genetic, and socioeconomic diversity; quality and comprehensiveness of preventive strategies; and risk factor distribution.”
The researchers noted as a limitation of their study that the 14 diseases captured were not an exhaustive list of neurological conditions; chronic lower back pain, a condition included in a previous major study of the burden of neurological disease in the United States, was omitted, as were restless legs syndrome and peripheral neuropathy. The researchers cited changes to coding practice in the U.S. and accuracy of medical claims data as potential limitations of their analysis. The Global Burden of Disease study is funded by the Bill and Melinda Gates Foundation, and several of Dr. Feigin’s coauthors reported financial relationships with industry.
Time to adjust the stroke belt?
Amelia Boehme, PhD, a stroke epidemiologist at Columbia University Mailman School of Public Health in New York, said in an interview that the current study added to recent findings showing surprising local variability in stroke prevalence, incidence, and mortality. “What we had always conceptually thought of as the ‘stroke belt’ isn’t necessarily the case,” Dr. Boehme said, but is rather subject to local, county-by-county variations. “Looking at the data here in conjunction with what previous authors have found, it raises some questions as to whether or not state-level data is giving a completely accurate picture, and whether we need to start looking at the county level and adjust for populations and age.” Importantly, Dr. Boehme said, data collected in the Global Burden of Disease study tends to be exceptionally rigorous and systematic, adding weight to Dr. Feigin and colleagues’ suggestions that prevention efforts may be making a dent in stroke and dementia.
“More data is always needed before we start to say we’re seeing things change,” Dr. Boehme noted. “But any glimmer of optimism is welcome, especially with regard to interventions that have been put in place, to allow us to build on those interventions.”
Dr. Boehme disclosed no financial conflicts of interest.
, according to new findings derived from the 2017 Global Burden of Disease study.
The authors of the analysis, led by Valery Feigin, MD, PhD, of New Zealand’s National Institute for Stroke and Applied Neurosciences, and published in the February 2021 issue of JAMA Neurology, looked at prevalence, incidence, mortality, and disability-adjusted life years for 14 neurological disorders across 50 states between 1990 and 2017. The diseases included in the analysis were stroke, Alzheimer’s disease and other dementias, Parkinson’s disease, epilepsy, multiple sclerosis, motor neuron disease, headaches, traumatic brain injury, spinal cord injuries, brain and other nervous system cancers, meningitis, encephalitis, and tetanus.
Tracking the burden of neurologic diseases
Dr. Feigin and colleagues estimated that a full 60% of the U.S. population lives with one or more of these disorders, a figure much greater than previous estimates for neurological disease burden nationwide. Tension-type headache and migraine were the most prevalent in the analysis by Dr. Feigin and colleagues. During the study period, they found, prevalence, incidence, and disability burden of nearly all the included disorders increased, with the exception of brain and spinal cord injuries, meningitis, and encephalitis.
The researchers attributed most of the rise in noncommunicable neurological diseases to population aging. An age-standardized analysis found trends for stroke and Alzheimer’s disease and other dementias to be declining or flat. Age-standardized stroke incidence dropped by 16% from 1990 to 2017, while stroke mortality declined by nearly a third, and stroke disability by a quarter. Age-standardized incidence of Alzheimer’s disease and other dementias dropped by 12%, and their prevalence by 13%, during the study period, though dementia mortality and disability were seen increasing.
The authors surmised that the age-standardized declines in stroke and dementias could reflect that “primary prevention of these disorders are beginning to show an influence.” With dementia, which is linked to cognitive reserve and education, “improving educational levels of cohort reaching the age groups at greatest risk of disease may also be contributing to a modest decline over time,” Dr. Feigin and his colleagues wrote.
Parkinson’s disease and multiple sclerosis, meanwhile, were both seen rising in incidence, prevalence, and disability adjusted life years (DALYs) even with age-standardized figures. The United States saw comparatively more disability in 2017 from dementias, Parkinson’s disease, epilepsy, multiple sclerosis, motor neuron disease, and headache disorders, which together comprised 6.7% of DALYs, compared with 4.4% globally; these also accounted for a higher share of mortality in the U.S. than worldwide. The authors attributed at least some of the difference to better case ascertainment in the U.S.
Regional variations
The researchers also reported variations in disease burden by state and region. While previous studies have identified a “stroke belt” concentrated in North Carolina, South Carolina, and Georgia, the new findings point to stroke disability highest in Alabama, Arkansas, and Mississippi, and mortality highest in Alabama, Mississippi, and South Carolina. The researchers noted increases in dementia mortality in these states, “likely attributable to the reciprocal association between stroke and dementia.”
Northern states saw higher burdens of multiple sclerosis compared with the rest of the country, while eastern states had higher rates of Parkinson’s disease.
Such regional and state-by state variations, Dr. Feigin and colleagues wrote in their analysis, “may be associated with differences in the case ascertainment, as well as access to health care; racial/ethnic, genetic, and socioeconomic diversity; quality and comprehensiveness of preventive strategies; and risk factor distribution.”
The researchers noted as a limitation of their study that the 14 diseases captured were not an exhaustive list of neurological conditions; chronic lower back pain, a condition included in a previous major study of the burden of neurological disease in the United States, was omitted, as were restless legs syndrome and peripheral neuropathy. The researchers cited changes to coding practice in the U.S. and accuracy of medical claims data as potential limitations of their analysis. The Global Burden of Disease study is funded by the Bill and Melinda Gates Foundation, and several of Dr. Feigin’s coauthors reported financial relationships with industry.
Time to adjust the stroke belt?
Amelia Boehme, PhD, a stroke epidemiologist at Columbia University Mailman School of Public Health in New York, said in an interview that the current study added to recent findings showing surprising local variability in stroke prevalence, incidence, and mortality. “What we had always conceptually thought of as the ‘stroke belt’ isn’t necessarily the case,” Dr. Boehme said, but is rather subject to local, county-by-county variations. “Looking at the data here in conjunction with what previous authors have found, it raises some questions as to whether or not state-level data is giving a completely accurate picture, and whether we need to start looking at the county level and adjust for populations and age.” Importantly, Dr. Boehme said, data collected in the Global Burden of Disease study tends to be exceptionally rigorous and systematic, adding weight to Dr. Feigin and colleagues’ suggestions that prevention efforts may be making a dent in stroke and dementia.
“More data is always needed before we start to say we’re seeing things change,” Dr. Boehme noted. “But any glimmer of optimism is welcome, especially with regard to interventions that have been put in place, to allow us to build on those interventions.”
Dr. Boehme disclosed no financial conflicts of interest.
, according to new findings derived from the 2017 Global Burden of Disease study.
The authors of the analysis, led by Valery Feigin, MD, PhD, of New Zealand’s National Institute for Stroke and Applied Neurosciences, and published in the February 2021 issue of JAMA Neurology, looked at prevalence, incidence, mortality, and disability-adjusted life years for 14 neurological disorders across 50 states between 1990 and 2017. The diseases included in the analysis were stroke, Alzheimer’s disease and other dementias, Parkinson’s disease, epilepsy, multiple sclerosis, motor neuron disease, headaches, traumatic brain injury, spinal cord injuries, brain and other nervous system cancers, meningitis, encephalitis, and tetanus.
Tracking the burden of neurologic diseases
Dr. Feigin and colleagues estimated that a full 60% of the U.S. population lives with one or more of these disorders, a figure much greater than previous estimates for neurological disease burden nationwide. Tension-type headache and migraine were the most prevalent in the analysis by Dr. Feigin and colleagues. During the study period, they found, prevalence, incidence, and disability burden of nearly all the included disorders increased, with the exception of brain and spinal cord injuries, meningitis, and encephalitis.
The researchers attributed most of the rise in noncommunicable neurological diseases to population aging. An age-standardized analysis found trends for stroke and Alzheimer’s disease and other dementias to be declining or flat. Age-standardized stroke incidence dropped by 16% from 1990 to 2017, while stroke mortality declined by nearly a third, and stroke disability by a quarter. Age-standardized incidence of Alzheimer’s disease and other dementias dropped by 12%, and their prevalence by 13%, during the study period, though dementia mortality and disability were seen increasing.
The authors surmised that the age-standardized declines in stroke and dementias could reflect that “primary prevention of these disorders are beginning to show an influence.” With dementia, which is linked to cognitive reserve and education, “improving educational levels of cohort reaching the age groups at greatest risk of disease may also be contributing to a modest decline over time,” Dr. Feigin and his colleagues wrote.
Parkinson’s disease and multiple sclerosis, meanwhile, were both seen rising in incidence, prevalence, and disability adjusted life years (DALYs) even with age-standardized figures. The United States saw comparatively more disability in 2017 from dementias, Parkinson’s disease, epilepsy, multiple sclerosis, motor neuron disease, and headache disorders, which together comprised 6.7% of DALYs, compared with 4.4% globally; these also accounted for a higher share of mortality in the U.S. than worldwide. The authors attributed at least some of the difference to better case ascertainment in the U.S.
Regional variations
The researchers also reported variations in disease burden by state and region. While previous studies have identified a “stroke belt” concentrated in North Carolina, South Carolina, and Georgia, the new findings point to stroke disability highest in Alabama, Arkansas, and Mississippi, and mortality highest in Alabama, Mississippi, and South Carolina. The researchers noted increases in dementia mortality in these states, “likely attributable to the reciprocal association between stroke and dementia.”
Northern states saw higher burdens of multiple sclerosis compared with the rest of the country, while eastern states had higher rates of Parkinson’s disease.
Such regional and state-by state variations, Dr. Feigin and colleagues wrote in their analysis, “may be associated with differences in the case ascertainment, as well as access to health care; racial/ethnic, genetic, and socioeconomic diversity; quality and comprehensiveness of preventive strategies; and risk factor distribution.”
The researchers noted as a limitation of their study that the 14 diseases captured were not an exhaustive list of neurological conditions; chronic lower back pain, a condition included in a previous major study of the burden of neurological disease in the United States, was omitted, as were restless legs syndrome and peripheral neuropathy. The researchers cited changes to coding practice in the U.S. and accuracy of medical claims data as potential limitations of their analysis. The Global Burden of Disease study is funded by the Bill and Melinda Gates Foundation, and several of Dr. Feigin’s coauthors reported financial relationships with industry.
Time to adjust the stroke belt?
Amelia Boehme, PhD, a stroke epidemiologist at Columbia University Mailman School of Public Health in New York, said in an interview that the current study added to recent findings showing surprising local variability in stroke prevalence, incidence, and mortality. “What we had always conceptually thought of as the ‘stroke belt’ isn’t necessarily the case,” Dr. Boehme said, but is rather subject to local, county-by-county variations. “Looking at the data here in conjunction with what previous authors have found, it raises some questions as to whether or not state-level data is giving a completely accurate picture, and whether we need to start looking at the county level and adjust for populations and age.” Importantly, Dr. Boehme said, data collected in the Global Burden of Disease study tends to be exceptionally rigorous and systematic, adding weight to Dr. Feigin and colleagues’ suggestions that prevention efforts may be making a dent in stroke and dementia.
“More data is always needed before we start to say we’re seeing things change,” Dr. Boehme noted. “But any glimmer of optimism is welcome, especially with regard to interventions that have been put in place, to allow us to build on those interventions.”
Dr. Boehme disclosed no financial conflicts of interest.
FROM JAMA NEUROLOGY
Ultrasound ablation for Parkinson’s disease: Benefit limited by adverse effects
including dyskinesias and other neurologic complications, in a new randomized, sham-controlled trial.
“Longer-term and larger trials are needed to determine the role of focused ultrasound subthalamotomy in the management of Parkinson’s disease and its effect as compared with other available treatments, including deep-brain stimulation,” the authors concluded.
The trial was published online Dec.24, 2020, in the New England Journal of Medicine.
An accompanying editorial concluded that the high rate of adverse events and the lack of ability to modulate treatment over time to treat prominent tremor “raise questions about the appropriate implementation of focused ultrasound–produced lesions for the treatment of Parkinson’s disease.”
A scalpel-free alternative to brain surgery
The study authors, led by Raul Martinez-Fernandez, MD, PhD, University Hospital HM Puerta del Sur, Mostoles, Spain, explained that, in severe cases of refractory motor manifestations such as tremor and motor complications, a neurosurgical approach using deep-brain stimulation of the subthalamic nucleus can be used. But to avoid craniotomy and electrode penetration, MRI-guided focused ultrasound for the ablation of deep-brain structures, including the subthalamic nucleus, is being investigated as a treatment for Parkinson’s disease.
Patients are potential candidates for ultrasound ablation if they have prominently asymmetric parkinsonism, if they are not considered to be clinically suitable candidates for surgery because of contraindications, or if they are reluctant to undergo a brain operation or to have an implanted device.
The current trial involved 40 patients with markedly asymmetric Parkinson’s disease who had motor signs not fully controlled by medication or who were ineligible for deep-brain stimulation surgery. They were randomly assigned in a 2:1 ratio to undergo focused ultrasound subthalamotomy on the side opposite their main motor signs or a sham procedure.
Results showed that the mean Movement Disorder Society–Unified Parkinson’s Disease Rating Scale part III (MDS-UPDRS III) motor score for the more affected side – which was the primary endpoint – decreased from 19.9 at baseline to 9.9 at 4 months in the active-treatment group (least-squares mean difference, 9.8 points); and from 18.7 to 17.1 in the control group (least-squares mean difference, 1.7 points). The between-group difference was 8.1 points (P < .001).
The change from baseline in the MDS-UPDRS III score for the more affected side in patients who underwent active treatment varied, ranging from 5% to 95%; the changes were qualitatively more evident for reduction of tremor and rigidity than for bradykinesia.
Adverse events in the active-treatment group were the following:
- Dyskinesia in the off-medication state in six patients and in the on-medication state in six, which persisted in three and one, respectively, at 4 months.
- Weakness on the treated side in five patients, which persisted in two at 4 months.
- Speech disturbance in 15 patients, which persisted in 3 at 4 months.
- Facial weakness in three patients, which persisted in one at 4 months.
- in 13 patients, which persisted in two at 4 months.
In six patients in the active-treatment group, some of these deficits were present at 12 months.
The researchers noted that an approach that has been suggested to reduce the risk of dyskinesias has been to extend ablations dorsal to the subthalamic nucleus in order to interrupt the pallidothalamic-projecting neurons.
The study also showed a greater reduction in the use of dopaminergic medication in the active-treatment group versus the control group, but the researchers noted that the 95% confidence intervals for this and other secondary outcomes were not adjusted for multiple comparisons, so no definite conclusions can be drawn from these data.
They also pointed out that subthalamotomy was performed in one hemisphere, and the natural evolution of Parkinson’s disease eventually leads to motor impairment on both sides of the body in most patients.
“The likely need for an increase in the daily dose of levodopa equivalent to maintain function on the untreated side of the body could lead to the development of dyskinesias on the treated side. However, the few open-label studies of long-term (≥36 months) follow-up of radiofrequency subthalamotomy performed in one hemisphere do not provide support for this concern,” they said.
An important step, but improvements are needed
In an accompanying editorial, Joel S. Perlmutter, MD, and Mwiza Ushe, MD, Washington University, St. Louis, noted that surgical deep brain stimulation of the left and right subthalamic nuclei has shown a reduction in the severity of motor signs of 40%-60% and a reduction in medication use of up to 50%. But this technique involves a small craniotomy with implantation of stimulating electrodes, which has a 1%-5% risk of major adverse events such as hemorrhage, stroke, or infection.
Less severe complications include dystonia, dysarthria, gait impairment, dyskinesia, swallowing dysfunction, or change in verbal fluency; however, modification of the device programming may alleviate these effects. Nevertheless, some patients are wary of the implantation surgery and hardware and therefore decline to undergo deep-brain stimulation, the editorialists explained.
“The development of alternative procedures to deep-brain stimulation is important to the field of Parkinson’s disease treatment. The current trial begins the path to that goal, and improvements in targeting may improve the risk-benefit ratio and permit the use of lesions in both hemispheres, which would widen the population of eligible patients,” Dr. Perlmutter and Dr. Ushe wrote.
They pointed out that limiting the treatment to one side of the brain by ultrasound-produced lesioning constrains the application, since most patients with Parkinson’s disease have progression of symptoms on both sides of the body.
“The potential advantages and limitations of focused ultrasound–produced lesioning should be discussed with patients. We hope that improved technique will reduce the associated risks and increase the applicability of this provocative procedure,” the editorialists concluded.
This study was supported by Insightec, the Focused Ultrasound Foundation, Fundacion MAPFRE, Fundacion Hospitales de Madrid, and the University of Virginia Center of Excellence. Dr. Martinez-Fernandez reported receiving for consultancy fees for Insightec. Dr. Ushe reported non-financial support for Abbott outside the submitted work. Dr. Perlmutter disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
including dyskinesias and other neurologic complications, in a new randomized, sham-controlled trial.
“Longer-term and larger trials are needed to determine the role of focused ultrasound subthalamotomy in the management of Parkinson’s disease and its effect as compared with other available treatments, including deep-brain stimulation,” the authors concluded.
The trial was published online Dec.24, 2020, in the New England Journal of Medicine.
An accompanying editorial concluded that the high rate of adverse events and the lack of ability to modulate treatment over time to treat prominent tremor “raise questions about the appropriate implementation of focused ultrasound–produced lesions for the treatment of Parkinson’s disease.”
A scalpel-free alternative to brain surgery
The study authors, led by Raul Martinez-Fernandez, MD, PhD, University Hospital HM Puerta del Sur, Mostoles, Spain, explained that, in severe cases of refractory motor manifestations such as tremor and motor complications, a neurosurgical approach using deep-brain stimulation of the subthalamic nucleus can be used. But to avoid craniotomy and electrode penetration, MRI-guided focused ultrasound for the ablation of deep-brain structures, including the subthalamic nucleus, is being investigated as a treatment for Parkinson’s disease.
Patients are potential candidates for ultrasound ablation if they have prominently asymmetric parkinsonism, if they are not considered to be clinically suitable candidates for surgery because of contraindications, or if they are reluctant to undergo a brain operation or to have an implanted device.
The current trial involved 40 patients with markedly asymmetric Parkinson’s disease who had motor signs not fully controlled by medication or who were ineligible for deep-brain stimulation surgery. They were randomly assigned in a 2:1 ratio to undergo focused ultrasound subthalamotomy on the side opposite their main motor signs or a sham procedure.
Results showed that the mean Movement Disorder Society–Unified Parkinson’s Disease Rating Scale part III (MDS-UPDRS III) motor score for the more affected side – which was the primary endpoint – decreased from 19.9 at baseline to 9.9 at 4 months in the active-treatment group (least-squares mean difference, 9.8 points); and from 18.7 to 17.1 in the control group (least-squares mean difference, 1.7 points). The between-group difference was 8.1 points (P < .001).
The change from baseline in the MDS-UPDRS III score for the more affected side in patients who underwent active treatment varied, ranging from 5% to 95%; the changes were qualitatively more evident for reduction of tremor and rigidity than for bradykinesia.
Adverse events in the active-treatment group were the following:
- Dyskinesia in the off-medication state in six patients and in the on-medication state in six, which persisted in three and one, respectively, at 4 months.
- Weakness on the treated side in five patients, which persisted in two at 4 months.
- Speech disturbance in 15 patients, which persisted in 3 at 4 months.
- Facial weakness in three patients, which persisted in one at 4 months.
- in 13 patients, which persisted in two at 4 months.
In six patients in the active-treatment group, some of these deficits were present at 12 months.
The researchers noted that an approach that has been suggested to reduce the risk of dyskinesias has been to extend ablations dorsal to the subthalamic nucleus in order to interrupt the pallidothalamic-projecting neurons.
The study also showed a greater reduction in the use of dopaminergic medication in the active-treatment group versus the control group, but the researchers noted that the 95% confidence intervals for this and other secondary outcomes were not adjusted for multiple comparisons, so no definite conclusions can be drawn from these data.
They also pointed out that subthalamotomy was performed in one hemisphere, and the natural evolution of Parkinson’s disease eventually leads to motor impairment on both sides of the body in most patients.
“The likely need for an increase in the daily dose of levodopa equivalent to maintain function on the untreated side of the body could lead to the development of dyskinesias on the treated side. However, the few open-label studies of long-term (≥36 months) follow-up of radiofrequency subthalamotomy performed in one hemisphere do not provide support for this concern,” they said.
An important step, but improvements are needed
In an accompanying editorial, Joel S. Perlmutter, MD, and Mwiza Ushe, MD, Washington University, St. Louis, noted that surgical deep brain stimulation of the left and right subthalamic nuclei has shown a reduction in the severity of motor signs of 40%-60% and a reduction in medication use of up to 50%. But this technique involves a small craniotomy with implantation of stimulating electrodes, which has a 1%-5% risk of major adverse events such as hemorrhage, stroke, or infection.
Less severe complications include dystonia, dysarthria, gait impairment, dyskinesia, swallowing dysfunction, or change in verbal fluency; however, modification of the device programming may alleviate these effects. Nevertheless, some patients are wary of the implantation surgery and hardware and therefore decline to undergo deep-brain stimulation, the editorialists explained.
“The development of alternative procedures to deep-brain stimulation is important to the field of Parkinson’s disease treatment. The current trial begins the path to that goal, and improvements in targeting may improve the risk-benefit ratio and permit the use of lesions in both hemispheres, which would widen the population of eligible patients,” Dr. Perlmutter and Dr. Ushe wrote.
They pointed out that limiting the treatment to one side of the brain by ultrasound-produced lesioning constrains the application, since most patients with Parkinson’s disease have progression of symptoms on both sides of the body.
“The potential advantages and limitations of focused ultrasound–produced lesioning should be discussed with patients. We hope that improved technique will reduce the associated risks and increase the applicability of this provocative procedure,” the editorialists concluded.
This study was supported by Insightec, the Focused Ultrasound Foundation, Fundacion MAPFRE, Fundacion Hospitales de Madrid, and the University of Virginia Center of Excellence. Dr. Martinez-Fernandez reported receiving for consultancy fees for Insightec. Dr. Ushe reported non-financial support for Abbott outside the submitted work. Dr. Perlmutter disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
including dyskinesias and other neurologic complications, in a new randomized, sham-controlled trial.
“Longer-term and larger trials are needed to determine the role of focused ultrasound subthalamotomy in the management of Parkinson’s disease and its effect as compared with other available treatments, including deep-brain stimulation,” the authors concluded.
The trial was published online Dec.24, 2020, in the New England Journal of Medicine.
An accompanying editorial concluded that the high rate of adverse events and the lack of ability to modulate treatment over time to treat prominent tremor “raise questions about the appropriate implementation of focused ultrasound–produced lesions for the treatment of Parkinson’s disease.”
A scalpel-free alternative to brain surgery
The study authors, led by Raul Martinez-Fernandez, MD, PhD, University Hospital HM Puerta del Sur, Mostoles, Spain, explained that, in severe cases of refractory motor manifestations such as tremor and motor complications, a neurosurgical approach using deep-brain stimulation of the subthalamic nucleus can be used. But to avoid craniotomy and electrode penetration, MRI-guided focused ultrasound for the ablation of deep-brain structures, including the subthalamic nucleus, is being investigated as a treatment for Parkinson’s disease.
Patients are potential candidates for ultrasound ablation if they have prominently asymmetric parkinsonism, if they are not considered to be clinically suitable candidates for surgery because of contraindications, or if they are reluctant to undergo a brain operation or to have an implanted device.
The current trial involved 40 patients with markedly asymmetric Parkinson’s disease who had motor signs not fully controlled by medication or who were ineligible for deep-brain stimulation surgery. They were randomly assigned in a 2:1 ratio to undergo focused ultrasound subthalamotomy on the side opposite their main motor signs or a sham procedure.
Results showed that the mean Movement Disorder Society–Unified Parkinson’s Disease Rating Scale part III (MDS-UPDRS III) motor score for the more affected side – which was the primary endpoint – decreased from 19.9 at baseline to 9.9 at 4 months in the active-treatment group (least-squares mean difference, 9.8 points); and from 18.7 to 17.1 in the control group (least-squares mean difference, 1.7 points). The between-group difference was 8.1 points (P < .001).
The change from baseline in the MDS-UPDRS III score for the more affected side in patients who underwent active treatment varied, ranging from 5% to 95%; the changes were qualitatively more evident for reduction of tremor and rigidity than for bradykinesia.
Adverse events in the active-treatment group were the following:
- Dyskinesia in the off-medication state in six patients and in the on-medication state in six, which persisted in three and one, respectively, at 4 months.
- Weakness on the treated side in five patients, which persisted in two at 4 months.
- Speech disturbance in 15 patients, which persisted in 3 at 4 months.
- Facial weakness in three patients, which persisted in one at 4 months.
- in 13 patients, which persisted in two at 4 months.
In six patients in the active-treatment group, some of these deficits were present at 12 months.
The researchers noted that an approach that has been suggested to reduce the risk of dyskinesias has been to extend ablations dorsal to the subthalamic nucleus in order to interrupt the pallidothalamic-projecting neurons.
The study also showed a greater reduction in the use of dopaminergic medication in the active-treatment group versus the control group, but the researchers noted that the 95% confidence intervals for this and other secondary outcomes were not adjusted for multiple comparisons, so no definite conclusions can be drawn from these data.
They also pointed out that subthalamotomy was performed in one hemisphere, and the natural evolution of Parkinson’s disease eventually leads to motor impairment on both sides of the body in most patients.
“The likely need for an increase in the daily dose of levodopa equivalent to maintain function on the untreated side of the body could lead to the development of dyskinesias on the treated side. However, the few open-label studies of long-term (≥36 months) follow-up of radiofrequency subthalamotomy performed in one hemisphere do not provide support for this concern,” they said.
An important step, but improvements are needed
In an accompanying editorial, Joel S. Perlmutter, MD, and Mwiza Ushe, MD, Washington University, St. Louis, noted that surgical deep brain stimulation of the left and right subthalamic nuclei has shown a reduction in the severity of motor signs of 40%-60% and a reduction in medication use of up to 50%. But this technique involves a small craniotomy with implantation of stimulating electrodes, which has a 1%-5% risk of major adverse events such as hemorrhage, stroke, or infection.
Less severe complications include dystonia, dysarthria, gait impairment, dyskinesia, swallowing dysfunction, or change in verbal fluency; however, modification of the device programming may alleviate these effects. Nevertheless, some patients are wary of the implantation surgery and hardware and therefore decline to undergo deep-brain stimulation, the editorialists explained.
“The development of alternative procedures to deep-brain stimulation is important to the field of Parkinson’s disease treatment. The current trial begins the path to that goal, and improvements in targeting may improve the risk-benefit ratio and permit the use of lesions in both hemispheres, which would widen the population of eligible patients,” Dr. Perlmutter and Dr. Ushe wrote.
They pointed out that limiting the treatment to one side of the brain by ultrasound-produced lesioning constrains the application, since most patients with Parkinson’s disease have progression of symptoms on both sides of the body.
“The potential advantages and limitations of focused ultrasound–produced lesioning should be discussed with patients. We hope that improved technique will reduce the associated risks and increase the applicability of this provocative procedure,” the editorialists concluded.
This study was supported by Insightec, the Focused Ultrasound Foundation, Fundacion MAPFRE, Fundacion Hospitales de Madrid, and the University of Virginia Center of Excellence. Dr. Martinez-Fernandez reported receiving for consultancy fees for Insightec. Dr. Ushe reported non-financial support for Abbott outside the submitted work. Dr. Perlmutter disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM THE NEW ENGLAND JOURNAL OF MEDICINE
Sublingual apomorphine alleviates off episodes in Parkinson’s disease
, long-term follow-up of a phase 3 study has shown. Besides the usual adverse effects with apomorphine, the sublingual film was associated with more oral adverse effects than seen with the injectable drug. However, it may have some advantages over subcutaneous apomorphine injections in terms of administration during off episodes.
The study was presented at the Movement Disorder Society 23rd International Congress of Parkinson’s Disease and Movement Disorders (Virtual) 2020.
For example, the new formulation is more convenient than carrying an injection. It comes in a small, tear-open packet that contains a medication strip patients place under their tongues.
“When a patient is in the off state, depending on how off they are, they could have a little difficulty opening the strip [packet], but anyone can open the strip for them,” said lead author Rajesh Pahwa, MD, professor of neurology and chief of the Parkinson and Movement Disorder Division at the University of Kansas Medical Center in Kansas City. “On the other hand with the subcutaneous, they have to give the injection themselves and a stranger or someone is not going to help them with that.”
Open-label safety and efficacy study
The aims of this open-label, 48-week follow-up were to add new patients to assess safety and tolerability over the long term and to see if continued benefit from a previous 12-week double-blind study was still present at 1 year for patients in the earlier study.
This multicenter study (NCT02542696) included “rollover” patients (n = 78 for safety; n = 70 for efficacy) from the previous phase 2/3 double-blind trial, as well as new patients with no prior exposure to apomorphine sublingual film (n = 347 for safety; n = 275 for efficacy).
New patients experienced one or more off episodes per day with a daily off time of 2 hours or more per day while on stable doses of levodopa/carbidopa. All had clinically meaningful responses to levodopa/carbidopa and were judged by the investigator to be Stage 1-3 by modified Hoehn and Yahr scale rating during ON periods.
Rollover patients completed the prior study and had no major changes in their anti-Parkinson’s medications since then. Mouth cankers or sores were exclusion criteria for either group. New subjects could not have received subcutaneous apomorphine within 7 days of a screening visit.
The demographics and baseline characteristics of the new and rollover groups were similar (approximately 64 years; 65%-71% male; 96% White; 8.3-9.6 years since diagnosis; 3.9 to 4.1 off episodes/day, and total mean daily levodopa dose of 1120 to 1478 mg).
Assessing only the group of new patients, the investigators reported that 80% had a Hoehn and Yahr score of 2 or 2.5 when in the ON state and a Movement Disorder Society–Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) Part III predose score of 41.8.
At the beginning of this study, patients in an off period received titrated doses of 10-35 mg of sublingual apomorphine in 5 mg increments during sequential office visits until they achieved a tolerable full ON within 45 minutes of a dose. They then entered a 48-week safety and efficacy phase, during which they self-administered the drug at home up to five times daily for off episodes with a minimum of 2 hours between doses. The investigators could adjust the doses for safety or lack of efficacy.
Two-thirds of new patients and three-quarters of rollovers received doses in the 10-20 mg range. The highest dose in the study of 35 mg was used by only 8%-9% of patients, but the highest approved and marketed dose is 30 mg.
Long-term benefits
Onset of efficacy was achieved by 15 minutes after dose for both new and rollover patients, and maximal efficacy occurred by 30 minutes. Results were very similar at 24, 36, and 48 weeks. The investigators did not perform statistical analyses.
Across study weeks 1, 12, 24, 36, and 48, between 77% and 92% of new patients and between 65% and 77% of rollover patients self-reported full ON within 30 minutes. “The long-term benefits are maintained over a year as far as the speed of onset and the duration,” Dr. Pahwa said.
Treatment-emergent adverse events occurred in about half of the new and the rollover patient groups in the titration phase and in 71%-81% of patients during the long-term safety phase. Nearly all were mild to moderate in severity.
A large number of participants withdrew from this long-term safety phase because of adverse events – 90 (33%) of new enrollees and 16 (23%) of rollover patients. Only 4% dropped out for lack of efficacy, all in the new enrollee group. Because the sublingual formulation is delivered under the tongue, patients in that group had more oral side effects, Dr. Pahwa said. Otherwise, “the side effects were very similar to the subcutaneous delivery.”
Treatment-emergent adverse events specific to sublingual apomorphine included oral mucosal erythema, lip or tongue swelling, and mouth ulceration (6% to 7% of patients each). Occurring less often were glossodynia, oral candidiasis, stomatitis, and tongue ulceration (2% each).
These were in addition to adverse events typically occurring with subcutaneous apomorphine, which are nausea, falls, dizziness, somnolence, dyskinesia, syncope, and yawning.
There are no head-to-head comparisons of sublingual versus subcutaneous delivery of apomorphine. But based on experience, Dr. Pahwa said, “With the subcutaneous, you have a slightly faster onset of action compared to the sublingual. However, sublingual has a slightly longer duration of benefit.”
He predicted that patients may prefer using an injection for a faster benefit or a sublingual for a slightly longer benefit.
More therapeutic options are welcome
Commenting on the study, Ray Dorsey, MD, professor of neurology at the University of Rochester (N.Y.), said that, for people with more advanced Parkinson’s disease “there’s usually a caregiver who’s injecting someone with an off period, as opposed to sublingual, which seems like a much easier way of administering a drug, especially for people with motor fluctuations.”
He noted that adverse events that led to premature discontinuation from the study “are concerning about the overall tolerability of the drug, which also will be determined in clinical practice, and will likely influence its overall utility.”
However, more therapeutic options are welcome because “the number of people with advanced Parkinson’s disease is going to grow and grow substantially,” he said. “So having therapies that help people with more advanced Parkinson’s disease ... many of whom don’t reach the clinic ... are going to be increasingly important.”
The study was supported by Sunovion. Dr. Pahwa and Dr. Dorsey reported conflicts of interest with numerous sources in industry.
A version of this article originally appeared on Medscape.com.
, long-term follow-up of a phase 3 study has shown. Besides the usual adverse effects with apomorphine, the sublingual film was associated with more oral adverse effects than seen with the injectable drug. However, it may have some advantages over subcutaneous apomorphine injections in terms of administration during off episodes.
The study was presented at the Movement Disorder Society 23rd International Congress of Parkinson’s Disease and Movement Disorders (Virtual) 2020.
For example, the new formulation is more convenient than carrying an injection. It comes in a small, tear-open packet that contains a medication strip patients place under their tongues.
“When a patient is in the off state, depending on how off they are, they could have a little difficulty opening the strip [packet], but anyone can open the strip for them,” said lead author Rajesh Pahwa, MD, professor of neurology and chief of the Parkinson and Movement Disorder Division at the University of Kansas Medical Center in Kansas City. “On the other hand with the subcutaneous, they have to give the injection themselves and a stranger or someone is not going to help them with that.”
Open-label safety and efficacy study
The aims of this open-label, 48-week follow-up were to add new patients to assess safety and tolerability over the long term and to see if continued benefit from a previous 12-week double-blind study was still present at 1 year for patients in the earlier study.
This multicenter study (NCT02542696) included “rollover” patients (n = 78 for safety; n = 70 for efficacy) from the previous phase 2/3 double-blind trial, as well as new patients with no prior exposure to apomorphine sublingual film (n = 347 for safety; n = 275 for efficacy).
New patients experienced one or more off episodes per day with a daily off time of 2 hours or more per day while on stable doses of levodopa/carbidopa. All had clinically meaningful responses to levodopa/carbidopa and were judged by the investigator to be Stage 1-3 by modified Hoehn and Yahr scale rating during ON periods.
Rollover patients completed the prior study and had no major changes in their anti-Parkinson’s medications since then. Mouth cankers or sores were exclusion criteria for either group. New subjects could not have received subcutaneous apomorphine within 7 days of a screening visit.
The demographics and baseline characteristics of the new and rollover groups were similar (approximately 64 years; 65%-71% male; 96% White; 8.3-9.6 years since diagnosis; 3.9 to 4.1 off episodes/day, and total mean daily levodopa dose of 1120 to 1478 mg).
Assessing only the group of new patients, the investigators reported that 80% had a Hoehn and Yahr score of 2 or 2.5 when in the ON state and a Movement Disorder Society–Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) Part III predose score of 41.8.
At the beginning of this study, patients in an off period received titrated doses of 10-35 mg of sublingual apomorphine in 5 mg increments during sequential office visits until they achieved a tolerable full ON within 45 minutes of a dose. They then entered a 48-week safety and efficacy phase, during which they self-administered the drug at home up to five times daily for off episodes with a minimum of 2 hours between doses. The investigators could adjust the doses for safety or lack of efficacy.
Two-thirds of new patients and three-quarters of rollovers received doses in the 10-20 mg range. The highest dose in the study of 35 mg was used by only 8%-9% of patients, but the highest approved and marketed dose is 30 mg.
Long-term benefits
Onset of efficacy was achieved by 15 minutes after dose for both new and rollover patients, and maximal efficacy occurred by 30 minutes. Results were very similar at 24, 36, and 48 weeks. The investigators did not perform statistical analyses.
Across study weeks 1, 12, 24, 36, and 48, between 77% and 92% of new patients and between 65% and 77% of rollover patients self-reported full ON within 30 minutes. “The long-term benefits are maintained over a year as far as the speed of onset and the duration,” Dr. Pahwa said.
Treatment-emergent adverse events occurred in about half of the new and the rollover patient groups in the titration phase and in 71%-81% of patients during the long-term safety phase. Nearly all were mild to moderate in severity.
A large number of participants withdrew from this long-term safety phase because of adverse events – 90 (33%) of new enrollees and 16 (23%) of rollover patients. Only 4% dropped out for lack of efficacy, all in the new enrollee group. Because the sublingual formulation is delivered under the tongue, patients in that group had more oral side effects, Dr. Pahwa said. Otherwise, “the side effects were very similar to the subcutaneous delivery.”
Treatment-emergent adverse events specific to sublingual apomorphine included oral mucosal erythema, lip or tongue swelling, and mouth ulceration (6% to 7% of patients each). Occurring less often were glossodynia, oral candidiasis, stomatitis, and tongue ulceration (2% each).
These were in addition to adverse events typically occurring with subcutaneous apomorphine, which are nausea, falls, dizziness, somnolence, dyskinesia, syncope, and yawning.
There are no head-to-head comparisons of sublingual versus subcutaneous delivery of apomorphine. But based on experience, Dr. Pahwa said, “With the subcutaneous, you have a slightly faster onset of action compared to the sublingual. However, sublingual has a slightly longer duration of benefit.”
He predicted that patients may prefer using an injection for a faster benefit or a sublingual for a slightly longer benefit.
More therapeutic options are welcome
Commenting on the study, Ray Dorsey, MD, professor of neurology at the University of Rochester (N.Y.), said that, for people with more advanced Parkinson’s disease “there’s usually a caregiver who’s injecting someone with an off period, as opposed to sublingual, which seems like a much easier way of administering a drug, especially for people with motor fluctuations.”
He noted that adverse events that led to premature discontinuation from the study “are concerning about the overall tolerability of the drug, which also will be determined in clinical practice, and will likely influence its overall utility.”
However, more therapeutic options are welcome because “the number of people with advanced Parkinson’s disease is going to grow and grow substantially,” he said. “So having therapies that help people with more advanced Parkinson’s disease ... many of whom don’t reach the clinic ... are going to be increasingly important.”
The study was supported by Sunovion. Dr. Pahwa and Dr. Dorsey reported conflicts of interest with numerous sources in industry.
A version of this article originally appeared on Medscape.com.
, long-term follow-up of a phase 3 study has shown. Besides the usual adverse effects with apomorphine, the sublingual film was associated with more oral adverse effects than seen with the injectable drug. However, it may have some advantages over subcutaneous apomorphine injections in terms of administration during off episodes.
The study was presented at the Movement Disorder Society 23rd International Congress of Parkinson’s Disease and Movement Disorders (Virtual) 2020.
For example, the new formulation is more convenient than carrying an injection. It comes in a small, tear-open packet that contains a medication strip patients place under their tongues.
“When a patient is in the off state, depending on how off they are, they could have a little difficulty opening the strip [packet], but anyone can open the strip for them,” said lead author Rajesh Pahwa, MD, professor of neurology and chief of the Parkinson and Movement Disorder Division at the University of Kansas Medical Center in Kansas City. “On the other hand with the subcutaneous, they have to give the injection themselves and a stranger or someone is not going to help them with that.”
Open-label safety and efficacy study
The aims of this open-label, 48-week follow-up were to add new patients to assess safety and tolerability over the long term and to see if continued benefit from a previous 12-week double-blind study was still present at 1 year for patients in the earlier study.
This multicenter study (NCT02542696) included “rollover” patients (n = 78 for safety; n = 70 for efficacy) from the previous phase 2/3 double-blind trial, as well as new patients with no prior exposure to apomorphine sublingual film (n = 347 for safety; n = 275 for efficacy).
New patients experienced one or more off episodes per day with a daily off time of 2 hours or more per day while on stable doses of levodopa/carbidopa. All had clinically meaningful responses to levodopa/carbidopa and were judged by the investigator to be Stage 1-3 by modified Hoehn and Yahr scale rating during ON periods.
Rollover patients completed the prior study and had no major changes in their anti-Parkinson’s medications since then. Mouth cankers or sores were exclusion criteria for either group. New subjects could not have received subcutaneous apomorphine within 7 days of a screening visit.
The demographics and baseline characteristics of the new and rollover groups were similar (approximately 64 years; 65%-71% male; 96% White; 8.3-9.6 years since diagnosis; 3.9 to 4.1 off episodes/day, and total mean daily levodopa dose of 1120 to 1478 mg).
Assessing only the group of new patients, the investigators reported that 80% had a Hoehn and Yahr score of 2 or 2.5 when in the ON state and a Movement Disorder Society–Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) Part III predose score of 41.8.
At the beginning of this study, patients in an off period received titrated doses of 10-35 mg of sublingual apomorphine in 5 mg increments during sequential office visits until they achieved a tolerable full ON within 45 minutes of a dose. They then entered a 48-week safety and efficacy phase, during which they self-administered the drug at home up to five times daily for off episodes with a minimum of 2 hours between doses. The investigators could adjust the doses for safety or lack of efficacy.
Two-thirds of new patients and three-quarters of rollovers received doses in the 10-20 mg range. The highest dose in the study of 35 mg was used by only 8%-9% of patients, but the highest approved and marketed dose is 30 mg.
Long-term benefits
Onset of efficacy was achieved by 15 minutes after dose for both new and rollover patients, and maximal efficacy occurred by 30 minutes. Results were very similar at 24, 36, and 48 weeks. The investigators did not perform statistical analyses.
Across study weeks 1, 12, 24, 36, and 48, between 77% and 92% of new patients and between 65% and 77% of rollover patients self-reported full ON within 30 minutes. “The long-term benefits are maintained over a year as far as the speed of onset and the duration,” Dr. Pahwa said.
Treatment-emergent adverse events occurred in about half of the new and the rollover patient groups in the titration phase and in 71%-81% of patients during the long-term safety phase. Nearly all were mild to moderate in severity.
A large number of participants withdrew from this long-term safety phase because of adverse events – 90 (33%) of new enrollees and 16 (23%) of rollover patients. Only 4% dropped out for lack of efficacy, all in the new enrollee group. Because the sublingual formulation is delivered under the tongue, patients in that group had more oral side effects, Dr. Pahwa said. Otherwise, “the side effects were very similar to the subcutaneous delivery.”
Treatment-emergent adverse events specific to sublingual apomorphine included oral mucosal erythema, lip or tongue swelling, and mouth ulceration (6% to 7% of patients each). Occurring less often were glossodynia, oral candidiasis, stomatitis, and tongue ulceration (2% each).
These were in addition to adverse events typically occurring with subcutaneous apomorphine, which are nausea, falls, dizziness, somnolence, dyskinesia, syncope, and yawning.
There are no head-to-head comparisons of sublingual versus subcutaneous delivery of apomorphine. But based on experience, Dr. Pahwa said, “With the subcutaneous, you have a slightly faster onset of action compared to the sublingual. However, sublingual has a slightly longer duration of benefit.”
He predicted that patients may prefer using an injection for a faster benefit or a sublingual for a slightly longer benefit.
More therapeutic options are welcome
Commenting on the study, Ray Dorsey, MD, professor of neurology at the University of Rochester (N.Y.), said that, for people with more advanced Parkinson’s disease “there’s usually a caregiver who’s injecting someone with an off period, as opposed to sublingual, which seems like a much easier way of administering a drug, especially for people with motor fluctuations.”
He noted that adverse events that led to premature discontinuation from the study “are concerning about the overall tolerability of the drug, which also will be determined in clinical practice, and will likely influence its overall utility.”
However, more therapeutic options are welcome because “the number of people with advanced Parkinson’s disease is going to grow and grow substantially,” he said. “So having therapies that help people with more advanced Parkinson’s disease ... many of whom don’t reach the clinic ... are going to be increasingly important.”
The study was supported by Sunovion. Dr. Pahwa and Dr. Dorsey reported conflicts of interest with numerous sources in industry.
A version of this article originally appeared on Medscape.com.
FROM MOVEMENT DISORDERS SOCIETY 2020
A skin test for Parkinson’s disease diagnosis?
a new study suggests. For the study, researchers used a chemical assay to detect clumping of the protein alpha-synuclein, a hallmark of Parkinson’s disease, in autopsy skin samples taken from patients who had Parkinson’s disease confirmed by brain pathology and from controls without the disease. The test showed a high degree of sensitivity and specificity for the diagnosis of Parkinson’s disease.
The study was published online in Movement Disorders.
“This test has a lot of promise,” said senior author Anumantha Kanthasamy, PhD, professor of biomedical sciences at Iowa State University in Ames. “At present there are no peripheral biomarkers for Parkinson’s disease. The current diagnosis is just based on symptoms, and the symptoms can be similar to many other neurological diseases,” he added. “It can take many years to establish a correct diagnosis and the accuracy is low even with experienced neurologists.”
If the current results can be replicated in samples from live patients and in those with very early stages of Parkinson’s disease, a skin test could allow early diagnosis and the possibility of starting preventive treatments to slow disease progression before symptoms develop too severely, the researchers suggest.
Sensitive and specific test
The blinded study used a seeding assay – used previously to detect misfolded proteins in prion diseases – to analyze 50 skin samples provided by the Arizona Study of Aging and Neurodegenerative Disorders/Brain and Body Donation Program based at Banner Sun Health Research Institute in Sun City.
Half of the skin samples came from patients with Parkinson’s disease and half came from people without neurologic disease. The protein assay correctly diagnosed 24 out of 25 patients with Parkinson’s disease and only one of the 25 controls had the protein clumping.
“At present, the only way to definitely diagnose Parkinson’s disease is on autopsy – by the detection of alpha-synuclein clumps [Lewy bodies] in the brain,” commented Charles Adler, MD, professor of neurology at Mayo Clinic Arizona in Scottsdale and a coinvestigator of the study. “In our research, we have also seen clumping of alpha-synuclein in many other organs including submandibular gland, colon, skin, heart, and stomach, but in terms of access, the skin is probably the easiest source.”
In this study, “we found this seeding assay for alpha-synuclein clumps to be extremely sensitive and specific in the diagnosis of Parkinson’s disease,” he added. “This is very valuable data as we have samples from patients with autopsy-validated Parkinson’s disease.”
A reliable biomarker?
The researchers are now starting a study in living patients with funding from the National Institutes of Health in which they will repeat the process comparing skin samples from patients with clinically diagnosed Parkinson’s disease and controls.
“We need to know whether analyzing alpha-synuclein clumping in skin biopsies from live patients with Parkinson’s disease would serve as a reliable biomarker for disease progression. Will clumping of this protein in skin samples increase over time and does it correspond with disease progression?” Dr. Adler said.
In future they are also hoping to test individuals who have not yet developed Parkinson’s disease but may have some prodromal type symptoms and to test whether this assay could measure a treatment effect of drug therapy.
Dr. Adler noted that they are currently conducting an autopsy study of skin samples from individuals who did not have clinical Parkinson’s disease when alive but in whom Lewy bodies have been found postmortem.
“This suggests that the disease pathology starts before Parkinson’s symptoms develop, and in the future, if we can diagnose Parkinson’s disease earlier then we may be able to stop progression,” he said.
“There is a long list of compounds that have been studied to try and slow progression but haven’t shown benefits, but by the time patients develop symptoms they already have significant disease and [have] lost most of their dopamine neurons,” he added. “If we could backtrack by 10 years, then these drugs may well make a difference.”
Dr. Adler also noted that currently more advanced patients may undergo invasive procedures such as deep brain stimulation or surgery. “It is of utmost importance that they have an accurate diagnosis before being subjected to such procedures.”
In addition, he pointed out that an accurate test would help the drug development process. “It is vitally important to enroll patients with an accurate diagnosis in clinical trials of new drugs. At present, a large percentage of patients in these trials may not actually have Parkinson’s disease, which makes it very difficult to show a treatment effect.”
Important step, but preliminary
Commenting on the research, James Beck, PhD, chief scientific officer of the Parkinson’s Foundation, said the study “is an important step toward the creation of a new way to potentially diagnose Parkinson’s disease.”
But he cautioned that this is a preliminary study. “To really confirm the possibility of using this approach for diagnosing Parkinson’s disease, a larger study will be necessary. And it will be important to test this in a population with early disease – the most difficult group to accurately diagnose.”
Also commenting on the findings, Beate Ritz, MD, PhD, an epidemiologist at UCLA Fielding School of Public Health in Los Angeles, who is part of a team also working on ways to measure abnormal alpha-synuclein to diagnose Parkinson’s disease, described the current study of skin samples as “pretty nifty.”
“Their research shows clearly that they can distinguish between patients with Parkinson’s disease and controls in this way,” she said. “The big advantage of this study is that they have brain pathology, so they know exactly which individuals had Parkinson’s disease.”
Dr. Ritz is working with Gal Bitan, PhD, from the UCLA Brain Research Institute on a potential blood test to measure abnormal alpha-synuclein.
Dr. Ritz explained that it is not possible to measure alpha-synuclein pathology in regular blood samples as it is expressed normally in red blood cells, but they are measuring the protein and its more toxic phosphorylated form from exosomes, which contain the waste discarded by cells using technology that determines the origin of these exosomes.
“Alpha-synuclein itself is not a problem. It is the way it misfolds that causes toxicity and disrupts the workings of the cell,” Dr. Ritz added. “In Parkinson’s disease, it is particularly toxic to dopaminergic neurons, and in multiple system atrophy, it is toxic to glial cells, so if we can identify the source of the protein then that could be helpful.”
The study was funded by the National Institutes of Health and the US Army Medical Research Materiel Command. The study authors, Dr. Beck, and Dr. Ritz have disclosed no relevant financial relationships.
A version of this article originally appeared on Medscape.com.
a new study suggests. For the study, researchers used a chemical assay to detect clumping of the protein alpha-synuclein, a hallmark of Parkinson’s disease, in autopsy skin samples taken from patients who had Parkinson’s disease confirmed by brain pathology and from controls without the disease. The test showed a high degree of sensitivity and specificity for the diagnosis of Parkinson’s disease.
The study was published online in Movement Disorders.
“This test has a lot of promise,” said senior author Anumantha Kanthasamy, PhD, professor of biomedical sciences at Iowa State University in Ames. “At present there are no peripheral biomarkers for Parkinson’s disease. The current diagnosis is just based on symptoms, and the symptoms can be similar to many other neurological diseases,” he added. “It can take many years to establish a correct diagnosis and the accuracy is low even with experienced neurologists.”
If the current results can be replicated in samples from live patients and in those with very early stages of Parkinson’s disease, a skin test could allow early diagnosis and the possibility of starting preventive treatments to slow disease progression before symptoms develop too severely, the researchers suggest.
Sensitive and specific test
The blinded study used a seeding assay – used previously to detect misfolded proteins in prion diseases – to analyze 50 skin samples provided by the Arizona Study of Aging and Neurodegenerative Disorders/Brain and Body Donation Program based at Banner Sun Health Research Institute in Sun City.
Half of the skin samples came from patients with Parkinson’s disease and half came from people without neurologic disease. The protein assay correctly diagnosed 24 out of 25 patients with Parkinson’s disease and only one of the 25 controls had the protein clumping.
“At present, the only way to definitely diagnose Parkinson’s disease is on autopsy – by the detection of alpha-synuclein clumps [Lewy bodies] in the brain,” commented Charles Adler, MD, professor of neurology at Mayo Clinic Arizona in Scottsdale and a coinvestigator of the study. “In our research, we have also seen clumping of alpha-synuclein in many other organs including submandibular gland, colon, skin, heart, and stomach, but in terms of access, the skin is probably the easiest source.”
In this study, “we found this seeding assay for alpha-synuclein clumps to be extremely sensitive and specific in the diagnosis of Parkinson’s disease,” he added. “This is very valuable data as we have samples from patients with autopsy-validated Parkinson’s disease.”
A reliable biomarker?
The researchers are now starting a study in living patients with funding from the National Institutes of Health in which they will repeat the process comparing skin samples from patients with clinically diagnosed Parkinson’s disease and controls.
“We need to know whether analyzing alpha-synuclein clumping in skin biopsies from live patients with Parkinson’s disease would serve as a reliable biomarker for disease progression. Will clumping of this protein in skin samples increase over time and does it correspond with disease progression?” Dr. Adler said.
In future they are also hoping to test individuals who have not yet developed Parkinson’s disease but may have some prodromal type symptoms and to test whether this assay could measure a treatment effect of drug therapy.
Dr. Adler noted that they are currently conducting an autopsy study of skin samples from individuals who did not have clinical Parkinson’s disease when alive but in whom Lewy bodies have been found postmortem.
“This suggests that the disease pathology starts before Parkinson’s symptoms develop, and in the future, if we can diagnose Parkinson’s disease earlier then we may be able to stop progression,” he said.
“There is a long list of compounds that have been studied to try and slow progression but haven’t shown benefits, but by the time patients develop symptoms they already have significant disease and [have] lost most of their dopamine neurons,” he added. “If we could backtrack by 10 years, then these drugs may well make a difference.”
Dr. Adler also noted that currently more advanced patients may undergo invasive procedures such as deep brain stimulation or surgery. “It is of utmost importance that they have an accurate diagnosis before being subjected to such procedures.”
In addition, he pointed out that an accurate test would help the drug development process. “It is vitally important to enroll patients with an accurate diagnosis in clinical trials of new drugs. At present, a large percentage of patients in these trials may not actually have Parkinson’s disease, which makes it very difficult to show a treatment effect.”
Important step, but preliminary
Commenting on the research, James Beck, PhD, chief scientific officer of the Parkinson’s Foundation, said the study “is an important step toward the creation of a new way to potentially diagnose Parkinson’s disease.”
But he cautioned that this is a preliminary study. “To really confirm the possibility of using this approach for diagnosing Parkinson’s disease, a larger study will be necessary. And it will be important to test this in a population with early disease – the most difficult group to accurately diagnose.”
Also commenting on the findings, Beate Ritz, MD, PhD, an epidemiologist at UCLA Fielding School of Public Health in Los Angeles, who is part of a team also working on ways to measure abnormal alpha-synuclein to diagnose Parkinson’s disease, described the current study of skin samples as “pretty nifty.”
“Their research shows clearly that they can distinguish between patients with Parkinson’s disease and controls in this way,” she said. “The big advantage of this study is that they have brain pathology, so they know exactly which individuals had Parkinson’s disease.”
Dr. Ritz is working with Gal Bitan, PhD, from the UCLA Brain Research Institute on a potential blood test to measure abnormal alpha-synuclein.
Dr. Ritz explained that it is not possible to measure alpha-synuclein pathology in regular blood samples as it is expressed normally in red blood cells, but they are measuring the protein and its more toxic phosphorylated form from exosomes, which contain the waste discarded by cells using technology that determines the origin of these exosomes.
“Alpha-synuclein itself is not a problem. It is the way it misfolds that causes toxicity and disrupts the workings of the cell,” Dr. Ritz added. “In Parkinson’s disease, it is particularly toxic to dopaminergic neurons, and in multiple system atrophy, it is toxic to glial cells, so if we can identify the source of the protein then that could be helpful.”
The study was funded by the National Institutes of Health and the US Army Medical Research Materiel Command. The study authors, Dr. Beck, and Dr. Ritz have disclosed no relevant financial relationships.
A version of this article originally appeared on Medscape.com.
a new study suggests. For the study, researchers used a chemical assay to detect clumping of the protein alpha-synuclein, a hallmark of Parkinson’s disease, in autopsy skin samples taken from patients who had Parkinson’s disease confirmed by brain pathology and from controls without the disease. The test showed a high degree of sensitivity and specificity for the diagnosis of Parkinson’s disease.
The study was published online in Movement Disorders.
“This test has a lot of promise,” said senior author Anumantha Kanthasamy, PhD, professor of biomedical sciences at Iowa State University in Ames. “At present there are no peripheral biomarkers for Parkinson’s disease. The current diagnosis is just based on symptoms, and the symptoms can be similar to many other neurological diseases,” he added. “It can take many years to establish a correct diagnosis and the accuracy is low even with experienced neurologists.”
If the current results can be replicated in samples from live patients and in those with very early stages of Parkinson’s disease, a skin test could allow early diagnosis and the possibility of starting preventive treatments to slow disease progression before symptoms develop too severely, the researchers suggest.
Sensitive and specific test
The blinded study used a seeding assay – used previously to detect misfolded proteins in prion diseases – to analyze 50 skin samples provided by the Arizona Study of Aging and Neurodegenerative Disorders/Brain and Body Donation Program based at Banner Sun Health Research Institute in Sun City.
Half of the skin samples came from patients with Parkinson’s disease and half came from people without neurologic disease. The protein assay correctly diagnosed 24 out of 25 patients with Parkinson’s disease and only one of the 25 controls had the protein clumping.
“At present, the only way to definitely diagnose Parkinson’s disease is on autopsy – by the detection of alpha-synuclein clumps [Lewy bodies] in the brain,” commented Charles Adler, MD, professor of neurology at Mayo Clinic Arizona in Scottsdale and a coinvestigator of the study. “In our research, we have also seen clumping of alpha-synuclein in many other organs including submandibular gland, colon, skin, heart, and stomach, but in terms of access, the skin is probably the easiest source.”
In this study, “we found this seeding assay for alpha-synuclein clumps to be extremely sensitive and specific in the diagnosis of Parkinson’s disease,” he added. “This is very valuable data as we have samples from patients with autopsy-validated Parkinson’s disease.”
A reliable biomarker?
The researchers are now starting a study in living patients with funding from the National Institutes of Health in which they will repeat the process comparing skin samples from patients with clinically diagnosed Parkinson’s disease and controls.
“We need to know whether analyzing alpha-synuclein clumping in skin biopsies from live patients with Parkinson’s disease would serve as a reliable biomarker for disease progression. Will clumping of this protein in skin samples increase over time and does it correspond with disease progression?” Dr. Adler said.
In future they are also hoping to test individuals who have not yet developed Parkinson’s disease but may have some prodromal type symptoms and to test whether this assay could measure a treatment effect of drug therapy.
Dr. Adler noted that they are currently conducting an autopsy study of skin samples from individuals who did not have clinical Parkinson’s disease when alive but in whom Lewy bodies have been found postmortem.
“This suggests that the disease pathology starts before Parkinson’s symptoms develop, and in the future, if we can diagnose Parkinson’s disease earlier then we may be able to stop progression,” he said.
“There is a long list of compounds that have been studied to try and slow progression but haven’t shown benefits, but by the time patients develop symptoms they already have significant disease and [have] lost most of their dopamine neurons,” he added. “If we could backtrack by 10 years, then these drugs may well make a difference.”
Dr. Adler also noted that currently more advanced patients may undergo invasive procedures such as deep brain stimulation or surgery. “It is of utmost importance that they have an accurate diagnosis before being subjected to such procedures.”
In addition, he pointed out that an accurate test would help the drug development process. “It is vitally important to enroll patients with an accurate diagnosis in clinical trials of new drugs. At present, a large percentage of patients in these trials may not actually have Parkinson’s disease, which makes it very difficult to show a treatment effect.”
Important step, but preliminary
Commenting on the research, James Beck, PhD, chief scientific officer of the Parkinson’s Foundation, said the study “is an important step toward the creation of a new way to potentially diagnose Parkinson’s disease.”
But he cautioned that this is a preliminary study. “To really confirm the possibility of using this approach for diagnosing Parkinson’s disease, a larger study will be necessary. And it will be important to test this in a population with early disease – the most difficult group to accurately diagnose.”
Also commenting on the findings, Beate Ritz, MD, PhD, an epidemiologist at UCLA Fielding School of Public Health in Los Angeles, who is part of a team also working on ways to measure abnormal alpha-synuclein to diagnose Parkinson’s disease, described the current study of skin samples as “pretty nifty.”
“Their research shows clearly that they can distinguish between patients with Parkinson’s disease and controls in this way,” she said. “The big advantage of this study is that they have brain pathology, so they know exactly which individuals had Parkinson’s disease.”
Dr. Ritz is working with Gal Bitan, PhD, from the UCLA Brain Research Institute on a potential blood test to measure abnormal alpha-synuclein.
Dr. Ritz explained that it is not possible to measure alpha-synuclein pathology in regular blood samples as it is expressed normally in red blood cells, but they are measuring the protein and its more toxic phosphorylated form from exosomes, which contain the waste discarded by cells using technology that determines the origin of these exosomes.
“Alpha-synuclein itself is not a problem. It is the way it misfolds that causes toxicity and disrupts the workings of the cell,” Dr. Ritz added. “In Parkinson’s disease, it is particularly toxic to dopaminergic neurons, and in multiple system atrophy, it is toxic to glial cells, so if we can identify the source of the protein then that could be helpful.”
The study was funded by the National Institutes of Health and the US Army Medical Research Materiel Command. The study authors, Dr. Beck, and Dr. Ritz have disclosed no relevant financial relationships.
A version of this article originally appeared on Medscape.com.
FROM MOVEMENT DISORDERS
Prodrug infusion beats oral Parkinson’s disease therapy for motor symptoms
, according to a new study. The beneficial effects of these phosphate prodrugs of levodopa and carbidopa were most noticeable in the early morning, results of the phase 1B study showed.
As Parkinson’s disease progresses and dosing of oral levodopa/carbidopa (LD/CD) increases, its therapeutic window narrows, resulting in troublesome dyskinesia at peak drug levels and tremors and rigidity when levels fall.
“Foslevodopa/foscarbidopa shows lower ‘off’ time than oral levodopa/carbidopa, and this was statistically significant. Also, foslevodopa/foscarbidopa (fosL/fosC) showed more ‘on’ time without dyskinesia, compared with oral levodopa/carbidopa. This was also statistically significant,” lead author Sven Stodtmann, PhD, of AbbVie GmbH, Ludwigshafen, Germany, reported in his recorded presentation at the Movement Disorders Society’s 23rd International Congress of Parkinson’s Disease and Movement Disorder (Virtual) 2020.
Continuous infusion versus oral therapy
The analysis included 20 patients, and all data from these individuals were collected between 4:30 a.m. and 9:30 p.m.
Participants were 12 men and 8 women, aged 30-80 years, with advanced, idiopathic Parkinson’s disease responsive to levodopa but inadequately controlled on their current stable therapy, having a minimum of 2.5 off hours/day. Mean age was 61.3 plus or minus 10.5 years (range 35-77 years).
In this single-arm, open-label study, they received subcutaneous infusions of personalized therapeutic doses of fosL/fosC 24 hours/day for 28 days after a 10- to 30-day screening period during which they recorded LD/CD doses in a diary and had motor symptoms monitored using a wearable device.
Following the screening period, fosL/fosC doses were titrated over up to 5 days, with subsequent weekly study visits, for a total time on fosL/fosC of 28 days. Drug titration was aimed at maximizing functional on time and minimizing the number of off episodes while minimizing troublesome dyskinesia.
Continuous infusion of fosL/fosC performed better than oral LD/CD on all counts.
“The off time is much lower in the morning for people on foslevodopa/foscarbidopa [compared with oral LD/CD] because this is a 24-hour infusion product,” Dr. Stodtmann explained.
The effect was maintained over the course of the day with little fluctuation with fosL/fosC, off periods never exceeding about 25% between 4:30 a.m. and 9 p.m. For LD/CD, off periods were highest in the early morning and peaked at about 50% on a 3- to 4-hour cycle during the course of the day.
Increased on time without dyskinesia varied between about 60% and 80% during the day with fosL/fosC, showing the greatest difference between fosL/fosC and oral LD/CD in the early morning hours.
“On time with nontroublesome dyskinesia was lower for foscarbidopa/foslevodopa, compared to oral levodopa/carbidopa, but this was not statistically significant,” Dr. Stodtmann said. On time with troublesome dyskinesia followed the same pattern, again, not statistically significant.
Looking at the data another way, the investigators calculated the odds ratios of motor symptoms using fosL/fosC, compared with oral LD/CD. Use of fosL/fosC was associated with a 59% lower risk of being in the off state during the day, compared with oral LD/CD (odds ratio, 0.4; 95% confidence interval, 0.2-0.7; P < .01). Similarly, the probability of being in the on state without dyskinesia was much greater with fosL/fosC (OR, 2.75; 95% CI, 1.08-6.99; P < .05).
Encouraging, but more data needed
Indu Subramanian, MD, of the department of neurology at the University of California, Los Angeles, and director of the Parkinson’s Disease Research, Education, and Clinical Center at the West Los Angeles Veterans Affairs Hospital, commented that the field has been waiting to see data on fosL/fosC.
“It seems like it’s pretty reasonable in terms of what the goals were, which is to improve stability of Parkinson’s symptoms, to improve off time and give on time without troublesome dyskinesia,” she said. “So I think those [goals] have been met.”
Dr. Subramanian, who was not involved with the research, said she would have liked to have seen results concerning safety of this drug formulation, which the presentation lacked, “because historically, there have been issues with nodule formation and skin breakdown, things like that, due to the stability of the product in the subcutaneous form. … So, always to my understanding, there has been this search for things that are tolerated in the subcutaneous delivery.”
If this formulation proves safe and tolerable, Dr. Subramanian sees a potential place for it for some patients with advanced Parkinson’s disease.
“Certainly a subcutaneous formulation will be better than something that requires … deep brain surgery or even a pump insertion like Duopa [carbidopa/levodopa enteral suspension, AbbVie] or something like that,” she said. “I think [it] would be beneficial over something with the gut because the gut historically has been a problem to rely on in advanced Parkinson’s patients due to slower transit times, and the gut itself is affected with Parkinson’s disease.”
Dr. Stodtmann and all coauthors are employees of AbbVie, which was the sponsor of the study and was responsible for all aspects of it. Dr. Subramanian has given talks for Acadia Pharmaceuticals and Acorda Therapeutics in the past.
A version of this article originally appeared on Medscape.com.
, according to a new study. The beneficial effects of these phosphate prodrugs of levodopa and carbidopa were most noticeable in the early morning, results of the phase 1B study showed.
As Parkinson’s disease progresses and dosing of oral levodopa/carbidopa (LD/CD) increases, its therapeutic window narrows, resulting in troublesome dyskinesia at peak drug levels and tremors and rigidity when levels fall.
“Foslevodopa/foscarbidopa shows lower ‘off’ time than oral levodopa/carbidopa, and this was statistically significant. Also, foslevodopa/foscarbidopa (fosL/fosC) showed more ‘on’ time without dyskinesia, compared with oral levodopa/carbidopa. This was also statistically significant,” lead author Sven Stodtmann, PhD, of AbbVie GmbH, Ludwigshafen, Germany, reported in his recorded presentation at the Movement Disorders Society’s 23rd International Congress of Parkinson’s Disease and Movement Disorder (Virtual) 2020.
Continuous infusion versus oral therapy
The analysis included 20 patients, and all data from these individuals were collected between 4:30 a.m. and 9:30 p.m.
Participants were 12 men and 8 women, aged 30-80 years, with advanced, idiopathic Parkinson’s disease responsive to levodopa but inadequately controlled on their current stable therapy, having a minimum of 2.5 off hours/day. Mean age was 61.3 plus or minus 10.5 years (range 35-77 years).
In this single-arm, open-label study, they received subcutaneous infusions of personalized therapeutic doses of fosL/fosC 24 hours/day for 28 days after a 10- to 30-day screening period during which they recorded LD/CD doses in a diary and had motor symptoms monitored using a wearable device.
Following the screening period, fosL/fosC doses were titrated over up to 5 days, with subsequent weekly study visits, for a total time on fosL/fosC of 28 days. Drug titration was aimed at maximizing functional on time and minimizing the number of off episodes while minimizing troublesome dyskinesia.
Continuous infusion of fosL/fosC performed better than oral LD/CD on all counts.
“The off time is much lower in the morning for people on foslevodopa/foscarbidopa [compared with oral LD/CD] because this is a 24-hour infusion product,” Dr. Stodtmann explained.
The effect was maintained over the course of the day with little fluctuation with fosL/fosC, off periods never exceeding about 25% between 4:30 a.m. and 9 p.m. For LD/CD, off periods were highest in the early morning and peaked at about 50% on a 3- to 4-hour cycle during the course of the day.
Increased on time without dyskinesia varied between about 60% and 80% during the day with fosL/fosC, showing the greatest difference between fosL/fosC and oral LD/CD in the early morning hours.
“On time with nontroublesome dyskinesia was lower for foscarbidopa/foslevodopa, compared to oral levodopa/carbidopa, but this was not statistically significant,” Dr. Stodtmann said. On time with troublesome dyskinesia followed the same pattern, again, not statistically significant.
Looking at the data another way, the investigators calculated the odds ratios of motor symptoms using fosL/fosC, compared with oral LD/CD. Use of fosL/fosC was associated with a 59% lower risk of being in the off state during the day, compared with oral LD/CD (odds ratio, 0.4; 95% confidence interval, 0.2-0.7; P < .01). Similarly, the probability of being in the on state without dyskinesia was much greater with fosL/fosC (OR, 2.75; 95% CI, 1.08-6.99; P < .05).
Encouraging, but more data needed
Indu Subramanian, MD, of the department of neurology at the University of California, Los Angeles, and director of the Parkinson’s Disease Research, Education, and Clinical Center at the West Los Angeles Veterans Affairs Hospital, commented that the field has been waiting to see data on fosL/fosC.
“It seems like it’s pretty reasonable in terms of what the goals were, which is to improve stability of Parkinson’s symptoms, to improve off time and give on time without troublesome dyskinesia,” she said. “So I think those [goals] have been met.”
Dr. Subramanian, who was not involved with the research, said she would have liked to have seen results concerning safety of this drug formulation, which the presentation lacked, “because historically, there have been issues with nodule formation and skin breakdown, things like that, due to the stability of the product in the subcutaneous form. … So, always to my understanding, there has been this search for things that are tolerated in the subcutaneous delivery.”
If this formulation proves safe and tolerable, Dr. Subramanian sees a potential place for it for some patients with advanced Parkinson’s disease.
“Certainly a subcutaneous formulation will be better than something that requires … deep brain surgery or even a pump insertion like Duopa [carbidopa/levodopa enteral suspension, AbbVie] or something like that,” she said. “I think [it] would be beneficial over something with the gut because the gut historically has been a problem to rely on in advanced Parkinson’s patients due to slower transit times, and the gut itself is affected with Parkinson’s disease.”
Dr. Stodtmann and all coauthors are employees of AbbVie, which was the sponsor of the study and was responsible for all aspects of it. Dr. Subramanian has given talks for Acadia Pharmaceuticals and Acorda Therapeutics in the past.
A version of this article originally appeared on Medscape.com.
, according to a new study. The beneficial effects of these phosphate prodrugs of levodopa and carbidopa were most noticeable in the early morning, results of the phase 1B study showed.
As Parkinson’s disease progresses and dosing of oral levodopa/carbidopa (LD/CD) increases, its therapeutic window narrows, resulting in troublesome dyskinesia at peak drug levels and tremors and rigidity when levels fall.
“Foslevodopa/foscarbidopa shows lower ‘off’ time than oral levodopa/carbidopa, and this was statistically significant. Also, foslevodopa/foscarbidopa (fosL/fosC) showed more ‘on’ time without dyskinesia, compared with oral levodopa/carbidopa. This was also statistically significant,” lead author Sven Stodtmann, PhD, of AbbVie GmbH, Ludwigshafen, Germany, reported in his recorded presentation at the Movement Disorders Society’s 23rd International Congress of Parkinson’s Disease and Movement Disorder (Virtual) 2020.
Continuous infusion versus oral therapy
The analysis included 20 patients, and all data from these individuals were collected between 4:30 a.m. and 9:30 p.m.
Participants were 12 men and 8 women, aged 30-80 years, with advanced, idiopathic Parkinson’s disease responsive to levodopa but inadequately controlled on their current stable therapy, having a minimum of 2.5 off hours/day. Mean age was 61.3 plus or minus 10.5 years (range 35-77 years).
In this single-arm, open-label study, they received subcutaneous infusions of personalized therapeutic doses of fosL/fosC 24 hours/day for 28 days after a 10- to 30-day screening period during which they recorded LD/CD doses in a diary and had motor symptoms monitored using a wearable device.
Following the screening period, fosL/fosC doses were titrated over up to 5 days, with subsequent weekly study visits, for a total time on fosL/fosC of 28 days. Drug titration was aimed at maximizing functional on time and minimizing the number of off episodes while minimizing troublesome dyskinesia.
Continuous infusion of fosL/fosC performed better than oral LD/CD on all counts.
“The off time is much lower in the morning for people on foslevodopa/foscarbidopa [compared with oral LD/CD] because this is a 24-hour infusion product,” Dr. Stodtmann explained.
The effect was maintained over the course of the day with little fluctuation with fosL/fosC, off periods never exceeding about 25% between 4:30 a.m. and 9 p.m. For LD/CD, off periods were highest in the early morning and peaked at about 50% on a 3- to 4-hour cycle during the course of the day.
Increased on time without dyskinesia varied between about 60% and 80% during the day with fosL/fosC, showing the greatest difference between fosL/fosC and oral LD/CD in the early morning hours.
“On time with nontroublesome dyskinesia was lower for foscarbidopa/foslevodopa, compared to oral levodopa/carbidopa, but this was not statistically significant,” Dr. Stodtmann said. On time with troublesome dyskinesia followed the same pattern, again, not statistically significant.
Looking at the data another way, the investigators calculated the odds ratios of motor symptoms using fosL/fosC, compared with oral LD/CD. Use of fosL/fosC was associated with a 59% lower risk of being in the off state during the day, compared with oral LD/CD (odds ratio, 0.4; 95% confidence interval, 0.2-0.7; P < .01). Similarly, the probability of being in the on state without dyskinesia was much greater with fosL/fosC (OR, 2.75; 95% CI, 1.08-6.99; P < .05).
Encouraging, but more data needed
Indu Subramanian, MD, of the department of neurology at the University of California, Los Angeles, and director of the Parkinson’s Disease Research, Education, and Clinical Center at the West Los Angeles Veterans Affairs Hospital, commented that the field has been waiting to see data on fosL/fosC.
“It seems like it’s pretty reasonable in terms of what the goals were, which is to improve stability of Parkinson’s symptoms, to improve off time and give on time without troublesome dyskinesia,” she said. “So I think those [goals] have been met.”
Dr. Subramanian, who was not involved with the research, said she would have liked to have seen results concerning safety of this drug formulation, which the presentation lacked, “because historically, there have been issues with nodule formation and skin breakdown, things like that, due to the stability of the product in the subcutaneous form. … So, always to my understanding, there has been this search for things that are tolerated in the subcutaneous delivery.”
If this formulation proves safe and tolerable, Dr. Subramanian sees a potential place for it for some patients with advanced Parkinson’s disease.
“Certainly a subcutaneous formulation will be better than something that requires … deep brain surgery or even a pump insertion like Duopa [carbidopa/levodopa enteral suspension, AbbVie] or something like that,” she said. “I think [it] would be beneficial over something with the gut because the gut historically has been a problem to rely on in advanced Parkinson’s patients due to slower transit times, and the gut itself is affected with Parkinson’s disease.”
Dr. Stodtmann and all coauthors are employees of AbbVie, which was the sponsor of the study and was responsible for all aspects of it. Dr. Subramanian has given talks for Acadia Pharmaceuticals and Acorda Therapeutics in the past.
A version of this article originally appeared on Medscape.com.
Telemedicine feasible and reliable in Parkinson’s trial
, a 1-year, phase 3 clinical trial has shown. The trial was an add-on study involving a subset of subjects from the STEADY-PD III trial of isradipine in early Parkinson’s disease.
Although the trial was conducted before SARS-CoV-2 arrived on the scene, the findings have particular relevance for being able to conduct a variety of clinical trials in the face of COVID-19 and the need to limit in-person interactions.
The 40 participants used tablets to complete three remote, video-based assessments during 1 year, with each remote visit planned to be completed within 4 weeks of an in-person visit. It was easy to enroll patients, and they completed about 95% of planned visits, said neurologist Christopher Tarolli, MD, of the University of Rochester (N.Y.).
He presented the study findings at the Movement Disorder Society’s 23rd International Congress of Parkinson’s Disease and Movement Disorders (Virtual) 2020.
“The visits were clearly feasible, and we were able to do them [84%] within that 4-week time frame around the in-person visit,” he said. “The visits were also reasonably reliable, particularly so for what we call the nonmotor outcomes and the patient-reported outcomes.”
In-person versus remote assessment
For the remote visits, participants completed primarily the same battery of tests as the in-person visits. Responses on the Movement Disorder Society-Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) subscales demonstrated “that there was excellent correlation between patient-reported and nonmotor outcome measures and moderate correlation between in-person and remote-performed motor assessments,” Dr. Tarolli said.
He explained that the study used modified motor assessments (MDS-UPDRS Part III) that excluded testing of rigidity and postural instability, which require hands-on testing by a trained examiner and thus are impossible to do remotely.
Additionally, the somewhat lower correlation on this subscale was probably the result of different investigators conducting in-person versus remote assessments, with a subset of in-person investigators who tended to rate participants more severely driving down the correlation. “I think if these methods were applied in future trials, the in-person and remote investigators would optimally be the same person,” Dr. Tarolli suggested.
Room for error?
Indu Subramanian, MD, of the department of neurology at the University of California, Los Angeles, and director of the Parkinson’s Disease Research, Education, and Clinical Center at the West Los Angeles Veterans Affairs Hospital, commented that “the reliability of UPDRS [part] III is where I would want to have, for sure, a little bit more of a deep dive. … possibly the same patient be rated by the same person.”
She also noted that doing remote and in-person assessments within 4 weeks of each other leaves a lot of room for variability. “You could see the same patient in the morning and then do UPDRS in the afternoon, and it can be totally different depending on when you meet the person,” she said.
Only so much testing can be done remotely. Nonetheless, she questioned whether it is really a valid UPDRS if rigidity and postural stability measures are eliminated. “[Is] this now a new modified UPDRS that we’re going to use that is as good as the old UPDRS moving forward, a home version of UPDRS or whatever we’re going to call it?”
Dr. Subramanian mentioned that patients have told her that UPDRS part III does not really measure what is most important to them, such as making pastries for their grandchildren rather than rapidly tapping their fingers.
“That speaks a little bit to the fact that we should have more patient-centered outcomes and things that patients can report. … things that are not going to require necessarily an in-person exam as maybe measures that really can be used moving forward in studies,” she suggested.
Patient satisfaction with remote visits
Greater than 90% of the patients were satisfied or very satisfied overall with the remote visits, including the convenience, comfort, and connection (using the devices and Internet connection), with “patients describing enjoying being able to do these visits from the comfort of their own home, not having to travel,” Dr. Tarolli said. Not having to drive in an ‘off’ state “was actually something that some participants identified as a safety benefit from this as well.”
There was also a time benefit to the patients and investigators. The average length of the remote visits was 54.3 minutes each versus 74 minutes of interaction for in-person visits, mainly a result of more efficient hand-offs between the neurologist and the study coordinator during the remote visits, plus being able to pause the remote visit to give a medication dose time to take effect.
For the patient, there was a large amount of time saved when travel time was considered – a total of 190.2 minutes on average for travel and testing for the in-person visits.
About three-quarters (76%) of the study patients said that remote visits would increase their likelihood of participating in future trials. However, that result may be skewed by the fact that these were already people willing to participate in a remote trial, so the generalizability of the result may be affected. Nonetheless, Dr. Tarolli said he thinks that, as technology gets better and older people become more comfortable with it, remote visits within Parkinson’s research studies may become more common.
One caveat he mentioned is that, with remote visits, the neurologist misses a chance to observe a patient’s whole body and construct a global impression of how he or she is moving. On the other hand, remote video gives the investigator the chance to see the living environment of the patient and suggest changes for safety, such as to reduce the risk of falling for a person with unsteadiness of gait living in a crowded house.
“It really allows us to make a more holistic assessment of how our patient is functioning outside the clinic, which I think we’ve traditionally had really no way of doing,” Dr. Tarolli said.
His final suggestion for anyone contemplating conducting studies with remote visits is to develop a team that is comfortable troubleshooting the technological aspects of those visits.
UCLA’s Dr. Subramanian lauded the University of Rochester team for their efforts in moving remote visits forward. “They’re at the cutting edge of these sorts of things,” she said. “So I’m assuming that they’ll come out with more things [for visits] to become better that are going to move this forward, which is exciting.”
Dr. Tarolli has disclosed no relevant financial relationships. Dr. Subramanian has given talks for Acorda Pharmaceuticals and Acadia Pharmaceuticals in the past. The study had only university, government, foundation, and other nonprofit support.
A version of this article originally appeared on Medscape.com.
, a 1-year, phase 3 clinical trial has shown. The trial was an add-on study involving a subset of subjects from the STEADY-PD III trial of isradipine in early Parkinson’s disease.
Although the trial was conducted before SARS-CoV-2 arrived on the scene, the findings have particular relevance for being able to conduct a variety of clinical trials in the face of COVID-19 and the need to limit in-person interactions.
The 40 participants used tablets to complete three remote, video-based assessments during 1 year, with each remote visit planned to be completed within 4 weeks of an in-person visit. It was easy to enroll patients, and they completed about 95% of planned visits, said neurologist Christopher Tarolli, MD, of the University of Rochester (N.Y.).
He presented the study findings at the Movement Disorder Society’s 23rd International Congress of Parkinson’s Disease and Movement Disorders (Virtual) 2020.
“The visits were clearly feasible, and we were able to do them [84%] within that 4-week time frame around the in-person visit,” he said. “The visits were also reasonably reliable, particularly so for what we call the nonmotor outcomes and the patient-reported outcomes.”
In-person versus remote assessment
For the remote visits, participants completed primarily the same battery of tests as the in-person visits. Responses on the Movement Disorder Society-Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) subscales demonstrated “that there was excellent correlation between patient-reported and nonmotor outcome measures and moderate correlation between in-person and remote-performed motor assessments,” Dr. Tarolli said.
He explained that the study used modified motor assessments (MDS-UPDRS Part III) that excluded testing of rigidity and postural instability, which require hands-on testing by a trained examiner and thus are impossible to do remotely.
Additionally, the somewhat lower correlation on this subscale was probably the result of different investigators conducting in-person versus remote assessments, with a subset of in-person investigators who tended to rate participants more severely driving down the correlation. “I think if these methods were applied in future trials, the in-person and remote investigators would optimally be the same person,” Dr. Tarolli suggested.
Room for error?
Indu Subramanian, MD, of the department of neurology at the University of California, Los Angeles, and director of the Parkinson’s Disease Research, Education, and Clinical Center at the West Los Angeles Veterans Affairs Hospital, commented that “the reliability of UPDRS [part] III is where I would want to have, for sure, a little bit more of a deep dive. … possibly the same patient be rated by the same person.”
She also noted that doing remote and in-person assessments within 4 weeks of each other leaves a lot of room for variability. “You could see the same patient in the morning and then do UPDRS in the afternoon, and it can be totally different depending on when you meet the person,” she said.
Only so much testing can be done remotely. Nonetheless, she questioned whether it is really a valid UPDRS if rigidity and postural stability measures are eliminated. “[Is] this now a new modified UPDRS that we’re going to use that is as good as the old UPDRS moving forward, a home version of UPDRS or whatever we’re going to call it?”
Dr. Subramanian mentioned that patients have told her that UPDRS part III does not really measure what is most important to them, such as making pastries for their grandchildren rather than rapidly tapping their fingers.
“That speaks a little bit to the fact that we should have more patient-centered outcomes and things that patients can report. … things that are not going to require necessarily an in-person exam as maybe measures that really can be used moving forward in studies,” she suggested.
Patient satisfaction with remote visits
Greater than 90% of the patients were satisfied or very satisfied overall with the remote visits, including the convenience, comfort, and connection (using the devices and Internet connection), with “patients describing enjoying being able to do these visits from the comfort of their own home, not having to travel,” Dr. Tarolli said. Not having to drive in an ‘off’ state “was actually something that some participants identified as a safety benefit from this as well.”
There was also a time benefit to the patients and investigators. The average length of the remote visits was 54.3 minutes each versus 74 minutes of interaction for in-person visits, mainly a result of more efficient hand-offs between the neurologist and the study coordinator during the remote visits, plus being able to pause the remote visit to give a medication dose time to take effect.
For the patient, there was a large amount of time saved when travel time was considered – a total of 190.2 minutes on average for travel and testing for the in-person visits.
About three-quarters (76%) of the study patients said that remote visits would increase their likelihood of participating in future trials. However, that result may be skewed by the fact that these were already people willing to participate in a remote trial, so the generalizability of the result may be affected. Nonetheless, Dr. Tarolli said he thinks that, as technology gets better and older people become more comfortable with it, remote visits within Parkinson’s research studies may become more common.
One caveat he mentioned is that, with remote visits, the neurologist misses a chance to observe a patient’s whole body and construct a global impression of how he or she is moving. On the other hand, remote video gives the investigator the chance to see the living environment of the patient and suggest changes for safety, such as to reduce the risk of falling for a person with unsteadiness of gait living in a crowded house.
“It really allows us to make a more holistic assessment of how our patient is functioning outside the clinic, which I think we’ve traditionally had really no way of doing,” Dr. Tarolli said.
His final suggestion for anyone contemplating conducting studies with remote visits is to develop a team that is comfortable troubleshooting the technological aspects of those visits.
UCLA’s Dr. Subramanian lauded the University of Rochester team for their efforts in moving remote visits forward. “They’re at the cutting edge of these sorts of things,” she said. “So I’m assuming that they’ll come out with more things [for visits] to become better that are going to move this forward, which is exciting.”
Dr. Tarolli has disclosed no relevant financial relationships. Dr. Subramanian has given talks for Acorda Pharmaceuticals and Acadia Pharmaceuticals in the past. The study had only university, government, foundation, and other nonprofit support.
A version of this article originally appeared on Medscape.com.
, a 1-year, phase 3 clinical trial has shown. The trial was an add-on study involving a subset of subjects from the STEADY-PD III trial of isradipine in early Parkinson’s disease.
Although the trial was conducted before SARS-CoV-2 arrived on the scene, the findings have particular relevance for being able to conduct a variety of clinical trials in the face of COVID-19 and the need to limit in-person interactions.
The 40 participants used tablets to complete three remote, video-based assessments during 1 year, with each remote visit planned to be completed within 4 weeks of an in-person visit. It was easy to enroll patients, and they completed about 95% of planned visits, said neurologist Christopher Tarolli, MD, of the University of Rochester (N.Y.).
He presented the study findings at the Movement Disorder Society’s 23rd International Congress of Parkinson’s Disease and Movement Disorders (Virtual) 2020.
“The visits were clearly feasible, and we were able to do them [84%] within that 4-week time frame around the in-person visit,” he said. “The visits were also reasonably reliable, particularly so for what we call the nonmotor outcomes and the patient-reported outcomes.”
In-person versus remote assessment
For the remote visits, participants completed primarily the same battery of tests as the in-person visits. Responses on the Movement Disorder Society-Unified Parkinson’s Disease Rating Scale (MDS-UPDRS) subscales demonstrated “that there was excellent correlation between patient-reported and nonmotor outcome measures and moderate correlation between in-person and remote-performed motor assessments,” Dr. Tarolli said.
He explained that the study used modified motor assessments (MDS-UPDRS Part III) that excluded testing of rigidity and postural instability, which require hands-on testing by a trained examiner and thus are impossible to do remotely.
Additionally, the somewhat lower correlation on this subscale was probably the result of different investigators conducting in-person versus remote assessments, with a subset of in-person investigators who tended to rate participants more severely driving down the correlation. “I think if these methods were applied in future trials, the in-person and remote investigators would optimally be the same person,” Dr. Tarolli suggested.
Room for error?
Indu Subramanian, MD, of the department of neurology at the University of California, Los Angeles, and director of the Parkinson’s Disease Research, Education, and Clinical Center at the West Los Angeles Veterans Affairs Hospital, commented that “the reliability of UPDRS [part] III is where I would want to have, for sure, a little bit more of a deep dive. … possibly the same patient be rated by the same person.”
She also noted that doing remote and in-person assessments within 4 weeks of each other leaves a lot of room for variability. “You could see the same patient in the morning and then do UPDRS in the afternoon, and it can be totally different depending on when you meet the person,” she said.
Only so much testing can be done remotely. Nonetheless, she questioned whether it is really a valid UPDRS if rigidity and postural stability measures are eliminated. “[Is] this now a new modified UPDRS that we’re going to use that is as good as the old UPDRS moving forward, a home version of UPDRS or whatever we’re going to call it?”
Dr. Subramanian mentioned that patients have told her that UPDRS part III does not really measure what is most important to them, such as making pastries for their grandchildren rather than rapidly tapping their fingers.
“That speaks a little bit to the fact that we should have more patient-centered outcomes and things that patients can report. … things that are not going to require necessarily an in-person exam as maybe measures that really can be used moving forward in studies,” she suggested.
Patient satisfaction with remote visits
Greater than 90% of the patients were satisfied or very satisfied overall with the remote visits, including the convenience, comfort, and connection (using the devices and Internet connection), with “patients describing enjoying being able to do these visits from the comfort of their own home, not having to travel,” Dr. Tarolli said. Not having to drive in an ‘off’ state “was actually something that some participants identified as a safety benefit from this as well.”
There was also a time benefit to the patients and investigators. The average length of the remote visits was 54.3 minutes each versus 74 minutes of interaction for in-person visits, mainly a result of more efficient hand-offs between the neurologist and the study coordinator during the remote visits, plus being able to pause the remote visit to give a medication dose time to take effect.
For the patient, there was a large amount of time saved when travel time was considered – a total of 190.2 minutes on average for travel and testing for the in-person visits.
About three-quarters (76%) of the study patients said that remote visits would increase their likelihood of participating in future trials. However, that result may be skewed by the fact that these were already people willing to participate in a remote trial, so the generalizability of the result may be affected. Nonetheless, Dr. Tarolli said he thinks that, as technology gets better and older people become more comfortable with it, remote visits within Parkinson’s research studies may become more common.
One caveat he mentioned is that, with remote visits, the neurologist misses a chance to observe a patient’s whole body and construct a global impression of how he or she is moving. On the other hand, remote video gives the investigator the chance to see the living environment of the patient and suggest changes for safety, such as to reduce the risk of falling for a person with unsteadiness of gait living in a crowded house.
“It really allows us to make a more holistic assessment of how our patient is functioning outside the clinic, which I think we’ve traditionally had really no way of doing,” Dr. Tarolli said.
His final suggestion for anyone contemplating conducting studies with remote visits is to develop a team that is comfortable troubleshooting the technological aspects of those visits.
UCLA’s Dr. Subramanian lauded the University of Rochester team for their efforts in moving remote visits forward. “They’re at the cutting edge of these sorts of things,” she said. “So I’m assuming that they’ll come out with more things [for visits] to become better that are going to move this forward, which is exciting.”
Dr. Tarolli has disclosed no relevant financial relationships. Dr. Subramanian has given talks for Acorda Pharmaceuticals and Acadia Pharmaceuticals in the past. The study had only university, government, foundation, and other nonprofit support.
A version of this article originally appeared on Medscape.com.