Movement Disorders

Treatment with deep brain stimulation improved motor function and quality of life, but depression scores increased after 1 year, based on data from 20 adults.

Subthalamic nucleus deep brain stimulation (STN-DBS) has emerged as an effective treatment for Parkinson’s disease symptoms, with evidence supporting improved motor symptoms and quality of life, wrote Francesca Mameli, PsyD, of Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, and colleagues.

Maggiore Policlinico Hospital of Milan

However, the effect of STN-DBS on personality in Parkinson’s disease (PD) has not been well investigated they said.

In a study published in Neuromodulation, the researchers reviewed data from 12 women and 8 men with PD who underwent bilateral STN-DBS.

Depression was assessed via the Montgomery-Asberg Depressive Rating Scale (MADRS), personality characteristics were assessed via the Minnesota Multiphasic Personality Inventory–2 (MMPI-2), and motor disabilities were assessed via UPDRS-III-Motor. The motor disabilities score was obtained in medication on and medication off conditions; the off condition followed a 12-hour overnight withdrawal of dopaminergic medication. Quality of life was assessed via the Parkinson’s Disease Questionnaire–8 (PDQ-8).

After 12 months, scores on the MMPI-2 were significantly higher on the D subscale, increased from a baseline mean of 56.05 to a 12-month mean of 61.90 (P = .015).

Other MMPI-2 scales showing significant increases included the DEP scale, LSE scale, WRK scale, and TRT scale. No differences appeared between male and female patients.

No significant changes occurred from pre-DBS baseline to the 12-month follow-up in MADRS scale assessment, with mean scores of 8.18 and 9.22, respectively.

A 40% improvement in UPDRS measures of motor function occurred among patients in the “medication-off” condition, although there was no significant change following DBS in the medication-on condition, the researchers said. Among 18 patients with PDQ-8 assessments, quality of life scores were significantly higher at 12 months’ post DBS compared to baseline pre DBS (40.15 vs. 30.73, P = .011).

The researchers also examined the relationship between the total electrical energy delivered (TEED) and the occurrence of personality trait shift. In the TEED analysis, “only the energy on the right side was inversely correlated with the changes in depression,” they wrote.

“Because of the complexity of psychiatric phenomena, it would be advisable to take a cautious approach by including psychiatric evaluation by interview for a better selection of patients who score close to the pathological cutoffs in MADRS and MMPI-2,” the researchers wrote in their discussion.

The study findings were limited by several factors including the small sample size, lack of data on the prevalence and severity of apathy, the use of scales based on self-reports, and inability to control for all factors that might affect depressive traits, the researchers noted. In addition, more research is needed to explore the correlation between TEED and personality trait changes, they said.

However, the results support the value of DBS in PD, but emphasize the need to manage expectations, they emphasized. “Expectations should never be unrealistic, and the caring team should ensure not only that patients fully understand the risks and potential benefits of the DBS but also that it will not stop the neurodegenerative progression of the disease,” they said.

The study was supported in part by the Italian Ministry of Health. The researchers had no financial conflicts to disclose.

Treatment with deep brain stimulation improved motor function and quality of life, but depression scores increased after 1 year, based on data from 20 adults.

Subthalamic nucleus deep brain stimulation (STN-DBS) has emerged as an effective treatment for Parkinson’s disease symptoms, with evidence supporting improved motor symptoms and quality of life, wrote Francesca Mameli, PsyD, of Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, and colleagues.

Maggiore Policlinico Hospital of Milan

However, the effect of STN-DBS on personality in Parkinson’s disease (PD) has not been well investigated they said.

In a study published in Neuromodulation, the researchers reviewed data from 12 women and 8 men with PD who underwent bilateral STN-DBS.

Depression was assessed via the Montgomery-Asberg Depressive Rating Scale (MADRS), personality characteristics were assessed via the Minnesota Multiphasic Personality Inventory–2 (MMPI-2), and motor disabilities were assessed via UPDRS-III-Motor. The motor disabilities score was obtained in medication on and medication off conditions; the off condition followed a 12-hour overnight withdrawal of dopaminergic medication. Quality of life was assessed via the Parkinson’s Disease Questionnaire–8 (PDQ-8).

After 12 months, scores on the MMPI-2 were significantly higher on the D subscale, increased from a baseline mean of 56.05 to a 12-month mean of 61.90 (P = .015).

Other MMPI-2 scales showing significant increases included the DEP scale, LSE scale, WRK scale, and TRT scale. No differences appeared between male and female patients.

No significant changes occurred from pre-DBS baseline to the 12-month follow-up in MADRS scale assessment, with mean scores of 8.18 and 9.22, respectively.

A 40% improvement in UPDRS measures of motor function occurred among patients in the “medication-off” condition, although there was no significant change following DBS in the medication-on condition, the researchers said. Among 18 patients with PDQ-8 assessments, quality of life scores were significantly higher at 12 months’ post DBS compared to baseline pre DBS (40.15 vs. 30.73, P = .011).

The researchers also examined the relationship between the total electrical energy delivered (TEED) and the occurrence of personality trait shift. In the TEED analysis, “only the energy on the right side was inversely correlated with the changes in depression,” they wrote.

“Because of the complexity of psychiatric phenomena, it would be advisable to take a cautious approach by including psychiatric evaluation by interview for a better selection of patients who score close to the pathological cutoffs in MADRS and MMPI-2,” the researchers wrote in their discussion.

The study findings were limited by several factors including the small sample size, lack of data on the prevalence and severity of apathy, the use of scales based on self-reports, and inability to control for all factors that might affect depressive traits, the researchers noted. In addition, more research is needed to explore the correlation between TEED and personality trait changes, they said.

However, the results support the value of DBS in PD, but emphasize the need to manage expectations, they emphasized. “Expectations should never be unrealistic, and the caring team should ensure not only that patients fully understand the risks and potential benefits of the DBS but also that it will not stop the neurodegenerative progression of the disease,” they said.

The study was supported in part by the Italian Ministry of Health. The researchers had no financial conflicts to disclose.

Treatment with deep brain stimulation improved motor function and quality of life, but depression scores increased after 1 year, based on data from 20 adults.

Subthalamic nucleus deep brain stimulation (STN-DBS) has emerged as an effective treatment for Parkinson’s disease symptoms, with evidence supporting improved motor symptoms and quality of life, wrote Francesca Mameli, PsyD, of Foundation IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, and colleagues.

Maggiore Policlinico Hospital of Milan

However, the effect of STN-DBS on personality in Parkinson’s disease (PD) has not been well investigated they said.

In a study published in Neuromodulation, the researchers reviewed data from 12 women and 8 men with PD who underwent bilateral STN-DBS.

Depression was assessed via the Montgomery-Asberg Depressive Rating Scale (MADRS), personality characteristics were assessed via the Minnesota Multiphasic Personality Inventory–2 (MMPI-2), and motor disabilities were assessed via UPDRS-III-Motor. The motor disabilities score was obtained in medication on and medication off conditions; the off condition followed a 12-hour overnight withdrawal of dopaminergic medication. Quality of life was assessed via the Parkinson’s Disease Questionnaire–8 (PDQ-8).

After 12 months, scores on the MMPI-2 were significantly higher on the D subscale, increased from a baseline mean of 56.05 to a 12-month mean of 61.90 (P = .015).

Other MMPI-2 scales showing significant increases included the DEP scale, LSE scale, WRK scale, and TRT scale. No differences appeared between male and female patients.

No significant changes occurred from pre-DBS baseline to the 12-month follow-up in MADRS scale assessment, with mean scores of 8.18 and 9.22, respectively.

A 40% improvement in UPDRS measures of motor function occurred among patients in the “medication-off” condition, although there was no significant change following DBS in the medication-on condition, the researchers said. Among 18 patients with PDQ-8 assessments, quality of life scores were significantly higher at 12 months’ post DBS compared to baseline pre DBS (40.15 vs. 30.73, P = .011).

The researchers also examined the relationship between the total electrical energy delivered (TEED) and the occurrence of personality trait shift. In the TEED analysis, “only the energy on the right side was inversely correlated with the changes in depression,” they wrote.

“Because of the complexity of psychiatric phenomena, it would be advisable to take a cautious approach by including psychiatric evaluation by interview for a better selection of patients who score close to the pathological cutoffs in MADRS and MMPI-2,” the researchers wrote in their discussion.

The study findings were limited by several factors including the small sample size, lack of data on the prevalence and severity of apathy, the use of scales based on self-reports, and inability to control for all factors that might affect depressive traits, the researchers noted. In addition, more research is needed to explore the correlation between TEED and personality trait changes, they said.

However, the results support the value of DBS in PD, but emphasize the need to manage expectations, they emphasized. “Expectations should never be unrealistic, and the caring team should ensure not only that patients fully understand the risks and potential benefits of the DBS but also that it will not stop the neurodegenerative progression of the disease,” they said.

The study was supported in part by the Italian Ministry of Health. The researchers had no financial conflicts to disclose.

Restless legs syndrome occurred in approximately 40% of adults with X-linked adrenoleukodystrophy, based on data from 32 individuals.

Patients with X-linked adrenoleukodystrophy (ALD), a neurodegenerative disease, often experience gait and balance problems, as well as leg discomfort, sleep disturbances, and pain, wrote John W. Winkelman, MD, of Massachusetts General Hospital, Boston, and colleagues. Restless legs syndrome (RLS) has been associated with neurological conditions including Parkinson’s disease, but the prevalence of RLS in ALD patients has not been examined, they said.

Courtesy Brigham and Women's Hospital

In a pilot study published in Sleep Medicine, the researchers identified 21 women and 11 men with ALD who were treated at a single center. The median age of the patients was 45.9 years. Twenty-seven patients had symptoms of myelopathy, with a median age of onset of 34 years.

The researchers assessed RLS severity using questionnaires and the Hopkins Telephone Diagnostic Interview (HTDI), a validated RLS assessment tool. They also reviewed patients’ charts for data on neurological examinations, functional gait measures, and laboratory assessments. Functional gait assessments included the 25-Foot Walk test (25-FW), the Timed Up and Go test (TUG), and Six Minute Walk test (6MW).

Thirteen patients (10 women and 3 men) met criteria for RLS based on the HTDI. The median age of RLS onset was 35 years. Six RLS patients (46.2%) reported using medication to relieve symptoms, and eight RLS patients had a history of antidepressant use.

In addition, six patients with RLS reported a history of anemia or iron deficiency. Ferritin levels were available for 14 patients: 8 women with RLS and 4 women and 2 men without RLS; the mean ferritin levels were 74.0 mcg/L in RLS patients and 99.5 mcg/L in those without RLS.

Of the seven ALD patients with brain lesions, all were men, only two were diagnosed with RLS, and all seven cases were mild, the researchers noted.

Overall, patients with RLS had more neurological signs and symptoms than those without RLS; the most significant were pain and gait difficulty. However, patients with RLS also were more likely than were those without RLS to report spasticity, muscle weakness, impaired coordination, hyperreflexia, impaired sensation, and paraesthesia, as well as bladder, bowel, and erectile dysfunction.

The 40.6% prevalence of RLS in patients with ALD is notably higher than that of the general population, in which the prevalence of RLS is 5%-10%, the researchers wrote in their discussion.

“Consistent with patterns observed in the general population, risk factors for RLS in this cohort of adults with ALD included female gender, increased age, lower iron indices, and use of serotonergic antidepressants,” they said.

The study findings were limited by several factors including the small size and the possible contribution of antidepressant use to the high rate of RLS, the researchers noted.

“Awareness of RLS in patients with ALD would allow for its effective treatment, which may improve the functional impairments as well as quality of life, mood, and anxiety issues in those with ALD,” they concluded.

The study received no outside funding.

Dr. Winkelman disclosed ties with Advance Medical, Avadel, Disc Medicine, Eisai, Emalex, Idorsia, Noctrix, UpToDate, and Merck Pharmaceuticals, as well as research support from the National Institute on Drug Abuse and the Baszucki Brain Research Foundation. The study also was supported by grants from the National Institute of Neurological Disorders and Stroke, the European Leukodystrophy Association, the Arrivederci Foundation, the Leblang Foundation, and the Hammer Family Fund Journal Preproof for ALD Research and Therapies for Women.

Restless legs syndrome occurred in approximately 40% of adults with X-linked adrenoleukodystrophy, based on data from 32 individuals.

Patients with X-linked adrenoleukodystrophy (ALD), a neurodegenerative disease, often experience gait and balance problems, as well as leg discomfort, sleep disturbances, and pain, wrote John W. Winkelman, MD, of Massachusetts General Hospital, Boston, and colleagues. Restless legs syndrome (RLS) has been associated with neurological conditions including Parkinson’s disease, but the prevalence of RLS in ALD patients has not been examined, they said.

Courtesy Brigham and Women's Hospital

In a pilot study published in Sleep Medicine, the researchers identified 21 women and 11 men with ALD who were treated at a single center. The median age of the patients was 45.9 years. Twenty-seven patients had symptoms of myelopathy, with a median age of onset of 34 years.

The researchers assessed RLS severity using questionnaires and the Hopkins Telephone Diagnostic Interview (HTDI), a validated RLS assessment tool. They also reviewed patients’ charts for data on neurological examinations, functional gait measures, and laboratory assessments. Functional gait assessments included the 25-Foot Walk test (25-FW), the Timed Up and Go test (TUG), and Six Minute Walk test (6MW).

Thirteen patients (10 women and 3 men) met criteria for RLS based on the HTDI. The median age of RLS onset was 35 years. Six RLS patients (46.2%) reported using medication to relieve symptoms, and eight RLS patients had a history of antidepressant use.

In addition, six patients with RLS reported a history of anemia or iron deficiency. Ferritin levels were available for 14 patients: 8 women with RLS and 4 women and 2 men without RLS; the mean ferritin levels were 74.0 mcg/L in RLS patients and 99.5 mcg/L in those without RLS.

Of the seven ALD patients with brain lesions, all were men, only two were diagnosed with RLS, and all seven cases were mild, the researchers noted.

Overall, patients with RLS had more neurological signs and symptoms than those without RLS; the most significant were pain and gait difficulty. However, patients with RLS also were more likely than were those without RLS to report spasticity, muscle weakness, impaired coordination, hyperreflexia, impaired sensation, and paraesthesia, as well as bladder, bowel, and erectile dysfunction.

The 40.6% prevalence of RLS in patients with ALD is notably higher than that of the general population, in which the prevalence of RLS is 5%-10%, the researchers wrote in their discussion.

“Consistent with patterns observed in the general population, risk factors for RLS in this cohort of adults with ALD included female gender, increased age, lower iron indices, and use of serotonergic antidepressants,” they said.

The study findings were limited by several factors including the small size and the possible contribution of antidepressant use to the high rate of RLS, the researchers noted.

“Awareness of RLS in patients with ALD would allow for its effective treatment, which may improve the functional impairments as well as quality of life, mood, and anxiety issues in those with ALD,” they concluded.

The study received no outside funding.

Dr. Winkelman disclosed ties with Advance Medical, Avadel, Disc Medicine, Eisai, Emalex, Idorsia, Noctrix, UpToDate, and Merck Pharmaceuticals, as well as research support from the National Institute on Drug Abuse and the Baszucki Brain Research Foundation. The study also was supported by grants from the National Institute of Neurological Disorders and Stroke, the European Leukodystrophy Association, the Arrivederci Foundation, the Leblang Foundation, and the Hammer Family Fund Journal Preproof for ALD Research and Therapies for Women.

Restless legs syndrome occurred in approximately 40% of adults with X-linked adrenoleukodystrophy, based on data from 32 individuals.

Patients with X-linked adrenoleukodystrophy (ALD), a neurodegenerative disease, often experience gait and balance problems, as well as leg discomfort, sleep disturbances, and pain, wrote John W. Winkelman, MD, of Massachusetts General Hospital, Boston, and colleagues. Restless legs syndrome (RLS) has been associated with neurological conditions including Parkinson’s disease, but the prevalence of RLS in ALD patients has not been examined, they said.

Courtesy Brigham and Women's Hospital

In a pilot study published in Sleep Medicine, the researchers identified 21 women and 11 men with ALD who were treated at a single center. The median age of the patients was 45.9 years. Twenty-seven patients had symptoms of myelopathy, with a median age of onset of 34 years.

The researchers assessed RLS severity using questionnaires and the Hopkins Telephone Diagnostic Interview (HTDI), a validated RLS assessment tool. They also reviewed patients’ charts for data on neurological examinations, functional gait measures, and laboratory assessments. Functional gait assessments included the 25-Foot Walk test (25-FW), the Timed Up and Go test (TUG), and Six Minute Walk test (6MW).

Thirteen patients (10 women and 3 men) met criteria for RLS based on the HTDI. The median age of RLS onset was 35 years. Six RLS patients (46.2%) reported using medication to relieve symptoms, and eight RLS patients had a history of antidepressant use.

In addition, six patients with RLS reported a history of anemia or iron deficiency. Ferritin levels were available for 14 patients: 8 women with RLS and 4 women and 2 men without RLS; the mean ferritin levels were 74.0 mcg/L in RLS patients and 99.5 mcg/L in those without RLS.

Of the seven ALD patients with brain lesions, all were men, only two were diagnosed with RLS, and all seven cases were mild, the researchers noted.

Overall, patients with RLS had more neurological signs and symptoms than those without RLS; the most significant were pain and gait difficulty. However, patients with RLS also were more likely than were those without RLS to report spasticity, muscle weakness, impaired coordination, hyperreflexia, impaired sensation, and paraesthesia, as well as bladder, bowel, and erectile dysfunction.

The 40.6% prevalence of RLS in patients with ALD is notably higher than that of the general population, in which the prevalence of RLS is 5%-10%, the researchers wrote in their discussion.

“Consistent with patterns observed in the general population, risk factors for RLS in this cohort of adults with ALD included female gender, increased age, lower iron indices, and use of serotonergic antidepressants,” they said.

The study findings were limited by several factors including the small size and the possible contribution of antidepressant use to the high rate of RLS, the researchers noted.

“Awareness of RLS in patients with ALD would allow for its effective treatment, which may improve the functional impairments as well as quality of life, mood, and anxiety issues in those with ALD,” they concluded.

The study received no outside funding.

Dr. Winkelman disclosed ties with Advance Medical, Avadel, Disc Medicine, Eisai, Emalex, Idorsia, Noctrix, UpToDate, and Merck Pharmaceuticals, as well as research support from the National Institute on Drug Abuse and the Baszucki Brain Research Foundation. The study also was supported by grants from the National Institute of Neurological Disorders and Stroke, the European Leukodystrophy Association, the Arrivederci Foundation, the Leblang Foundation, and the Hammer Family Fund Journal Preproof for ALD Research and Therapies for Women.

SEATTLE – A novel treatment for amyotrophic lateral sclerosis (ALS) that targets brain cell energy production to promote remyelination showed signs of efficacy in a phase 2 trial, though it did not meet its primary endpoint, which was the change in the summated motor unit index (MUNIX) from baseline to week 36.

The drug, CNM-Au8, is being developed by Clene, and would represent a novel mechanism of action. “This is a brand-new approach. We used it complementary with riluzole and it was well tolerated, so I see this as an add-on therapy. I think if we can show some more positivity and longer-term results, it’s going to be a game changer for ALS,” Matthew Kiernan, MBBS, PhD, said in an interview. Dr. Kiernan presented the results at the 2022 annual meeting of the American Academy of Neurology.

Jim Kling/MDedge News

Riluzole (Rilutek), which received Food and Drug Administration approval in 1995, inhibits glutamate release to counter excitotoxicity, which is believed to play a role in ALS, Huntington’s disease, ischemia, and other acute and chronic neurodegenerative diseases. The other FDA-approved agent for ALS is the neuroprotective agent and free-radical scavenger edaravone (Radicava), approved in 2017.

CNM-Au8 is made up of catalytically active gold nanocrystals that cross the blood-brain barrier, but lacks the toxicity associated with other synthetic gold compounds, according to the company. The formulation is also being investigated for the treatment of Parkinson’s disease and multiple sclerosis. Basic research has shown that it stabilizes mitochondria and reduces accumulation of the TDP-43 protein, which is linked to spread of ALS through the brain, Dr. Kiernan said during his presentation.

The treatment is well tolerated. “Normally in an ALS trial, we see about a 25% dropout rate. There were no dropouts on the active compound in the clinical trial. There are less deaths, so improved survival,” said Dr. Kiernan, the Bushell chair of neurology at the University of Sydney and codirector of the Brain and Mind Center in Sydney.
 

Good safety signal

The fact that the trial missed its primary endpoint isn’t too concerning, according to Nicholas Johnson, MD, who comoderated the session where the study was presented. “ALS clinical trials are incredibly difficult to conduct, especially a phase 2 learning-phase clinical trial. At this phase, I’m much more buoyed by the fact that they have a good safety signal, and that they’re willing to move forward to that phase 3 clinical trial,” Dr. Johnson said in an interview. He is vice chair of research at Virginia Commonwealth University, Richmond.

A phase 3 clinical trial is in development in the United States and Europe. The drug also is included as part of the HEALEY ALS Platform Trial, which is testing multiple ALS therapies simultaneously. “The results from that should be available by the second half of this year and it will also inform us as to what the approach should be,” said Dr. Kiernan.

Dr. Johnson also was enthusiastic. “I’m excited to see the results in terms of the primary endpoints for that next phase 3 clinical trial,” he said.
 

Ongoing research

In September 2021, Clene announced a second expanded access program for people with ALS.

The study included a 36-week double-blind treatment period followed by long-term, open-label follow-up. Twenty-three patients received 30 mg CNM-Au8, and 22 received placebo. In the first 36 weeks, the treatment group was more likely to have no disease progression, defined as death, tracheostomy, noninvasive ventilation, or a gastronomy tube (P = .0125). The researchers compared the probability of experiencing a less than 6-point decline in the Revised Amyotrophic Lateral Sclerosis Functional Rating Scale. At 12 weeks, it was about 85% in both groups. At 24 weeks, it was about 60% to 50% in favor of the CNM-Au8 group, and at 36 weeks it was about 50% to 20% (P = .0350).

At 36 weeks, quality of life as measured by the ALS Specific Quality of Life–Short Form was better in the treatment group at 36 weeks (mean change, 0.9; P = .0177).

Survival was better in the treatment group at 96 weeks than the mortality derived from a European Network for the Cure of ALS prediction model (hazard ratio [HR], 0.2974; P = .0068). This benefit also was experienced by patients who received drug throughout the study (HR, 0.36; 95% confidence interval [CI], 0.12-1.1) and those who started out on placebo and converted to active drug during the open-label period (HR, 0.24; 95% CI, 0.064-0.88).

The study was funded by Clene and FightMND. Dr. Kiernan and Dr. Johnson have no relevant financial disclosures.

SEATTLE – A novel treatment for amyotrophic lateral sclerosis (ALS) that targets brain cell energy production to promote remyelination showed signs of efficacy in a phase 2 trial, though it did not meet its primary endpoint, which was the change in the summated motor unit index (MUNIX) from baseline to week 36.

The drug, CNM-Au8, is being developed by Clene, and would represent a novel mechanism of action. “This is a brand-new approach. We used it complementary with riluzole and it was well tolerated, so I see this as an add-on therapy. I think if we can show some more positivity and longer-term results, it’s going to be a game changer for ALS,” Matthew Kiernan, MBBS, PhD, said in an interview. Dr. Kiernan presented the results at the 2022 annual meeting of the American Academy of Neurology.

Jim Kling/MDedge News

Riluzole (Rilutek), which received Food and Drug Administration approval in 1995, inhibits glutamate release to counter excitotoxicity, which is believed to play a role in ALS, Huntington’s disease, ischemia, and other acute and chronic neurodegenerative diseases. The other FDA-approved agent for ALS is the neuroprotective agent and free-radical scavenger edaravone (Radicava), approved in 2017.

CNM-Au8 is made up of catalytically active gold nanocrystals that cross the blood-brain barrier, but lacks the toxicity associated with other synthetic gold compounds, according to the company. The formulation is also being investigated for the treatment of Parkinson’s disease and multiple sclerosis. Basic research has shown that it stabilizes mitochondria and reduces accumulation of the TDP-43 protein, which is linked to spread of ALS through the brain, Dr. Kiernan said during his presentation.

The treatment is well tolerated. “Normally in an ALS trial, we see about a 25% dropout rate. There were no dropouts on the active compound in the clinical trial. There are less deaths, so improved survival,” said Dr. Kiernan, the Bushell chair of neurology at the University of Sydney and codirector of the Brain and Mind Center in Sydney.
 

Good safety signal

The fact that the trial missed its primary endpoint isn’t too concerning, according to Nicholas Johnson, MD, who comoderated the session where the study was presented. “ALS clinical trials are incredibly difficult to conduct, especially a phase 2 learning-phase clinical trial. At this phase, I’m much more buoyed by the fact that they have a good safety signal, and that they’re willing to move forward to that phase 3 clinical trial,” Dr. Johnson said in an interview. He is vice chair of research at Virginia Commonwealth University, Richmond.

A phase 3 clinical trial is in development in the United States and Europe. The drug also is included as part of the HEALEY ALS Platform Trial, which is testing multiple ALS therapies simultaneously. “The results from that should be available by the second half of this year and it will also inform us as to what the approach should be,” said Dr. Kiernan.

Dr. Johnson also was enthusiastic. “I’m excited to see the results in terms of the primary endpoints for that next phase 3 clinical trial,” he said.
 

Ongoing research

In September 2021, Clene announced a second expanded access program for people with ALS.

The study included a 36-week double-blind treatment period followed by long-term, open-label follow-up. Twenty-three patients received 30 mg CNM-Au8, and 22 received placebo. In the first 36 weeks, the treatment group was more likely to have no disease progression, defined as death, tracheostomy, noninvasive ventilation, or a gastronomy tube (P = .0125). The researchers compared the probability of experiencing a less than 6-point decline in the Revised Amyotrophic Lateral Sclerosis Functional Rating Scale. At 12 weeks, it was about 85% in both groups. At 24 weeks, it was about 60% to 50% in favor of the CNM-Au8 group, and at 36 weeks it was about 50% to 20% (P = .0350).

At 36 weeks, quality of life as measured by the ALS Specific Quality of Life–Short Form was better in the treatment group at 36 weeks (mean change, 0.9; P = .0177).

Survival was better in the treatment group at 96 weeks than the mortality derived from a European Network for the Cure of ALS prediction model (hazard ratio [HR], 0.2974; P = .0068). This benefit also was experienced by patients who received drug throughout the study (HR, 0.36; 95% confidence interval [CI], 0.12-1.1) and those who started out on placebo and converted to active drug during the open-label period (HR, 0.24; 95% CI, 0.064-0.88).

The study was funded by Clene and FightMND. Dr. Kiernan and Dr. Johnson have no relevant financial disclosures.

SEATTLE – A novel treatment for amyotrophic lateral sclerosis (ALS) that targets brain cell energy production to promote remyelination showed signs of efficacy in a phase 2 trial, though it did not meet its primary endpoint, which was the change in the summated motor unit index (MUNIX) from baseline to week 36.

The drug, CNM-Au8, is being developed by Clene, and would represent a novel mechanism of action. “This is a brand-new approach. We used it complementary with riluzole and it was well tolerated, so I see this as an add-on therapy. I think if we can show some more positivity and longer-term results, it’s going to be a game changer for ALS,” Matthew Kiernan, MBBS, PhD, said in an interview. Dr. Kiernan presented the results at the 2022 annual meeting of the American Academy of Neurology.

Jim Kling/MDedge News

Riluzole (Rilutek), which received Food and Drug Administration approval in 1995, inhibits glutamate release to counter excitotoxicity, which is believed to play a role in ALS, Huntington’s disease, ischemia, and other acute and chronic neurodegenerative diseases. The other FDA-approved agent for ALS is the neuroprotective agent and free-radical scavenger edaravone (Radicava), approved in 2017.

CNM-Au8 is made up of catalytically active gold nanocrystals that cross the blood-brain barrier, but lacks the toxicity associated with other synthetic gold compounds, according to the company. The formulation is also being investigated for the treatment of Parkinson’s disease and multiple sclerosis. Basic research has shown that it stabilizes mitochondria and reduces accumulation of the TDP-43 protein, which is linked to spread of ALS through the brain, Dr. Kiernan said during his presentation.

The treatment is well tolerated. “Normally in an ALS trial, we see about a 25% dropout rate. There were no dropouts on the active compound in the clinical trial. There are less deaths, so improved survival,” said Dr. Kiernan, the Bushell chair of neurology at the University of Sydney and codirector of the Brain and Mind Center in Sydney.
 

Good safety signal

The fact that the trial missed its primary endpoint isn’t too concerning, according to Nicholas Johnson, MD, who comoderated the session where the study was presented. “ALS clinical trials are incredibly difficult to conduct, especially a phase 2 learning-phase clinical trial. At this phase, I’m much more buoyed by the fact that they have a good safety signal, and that they’re willing to move forward to that phase 3 clinical trial,” Dr. Johnson said in an interview. He is vice chair of research at Virginia Commonwealth University, Richmond.

A phase 3 clinical trial is in development in the United States and Europe. The drug also is included as part of the HEALEY ALS Platform Trial, which is testing multiple ALS therapies simultaneously. “The results from that should be available by the second half of this year and it will also inform us as to what the approach should be,” said Dr. Kiernan.

Dr. Johnson also was enthusiastic. “I’m excited to see the results in terms of the primary endpoints for that next phase 3 clinical trial,” he said.
 

Ongoing research

In September 2021, Clene announced a second expanded access program for people with ALS.

The study included a 36-week double-blind treatment period followed by long-term, open-label follow-up. Twenty-three patients received 30 mg CNM-Au8, and 22 received placebo. In the first 36 weeks, the treatment group was more likely to have no disease progression, defined as death, tracheostomy, noninvasive ventilation, or a gastronomy tube (P = .0125). The researchers compared the probability of experiencing a less than 6-point decline in the Revised Amyotrophic Lateral Sclerosis Functional Rating Scale. At 12 weeks, it was about 85% in both groups. At 24 weeks, it was about 60% to 50% in favor of the CNM-Au8 group, and at 36 weeks it was about 50% to 20% (P = .0350).

At 36 weeks, quality of life as measured by the ALS Specific Quality of Life–Short Form was better in the treatment group at 36 weeks (mean change, 0.9; P = .0177).

Survival was better in the treatment group at 96 weeks than the mortality derived from a European Network for the Cure of ALS prediction model (hazard ratio [HR], 0.2974; P = .0068). This benefit also was experienced by patients who received drug throughout the study (HR, 0.36; 95% confidence interval [CI], 0.12-1.1) and those who started out on placebo and converted to active drug during the open-label period (HR, 0.24; 95% CI, 0.064-0.88).

The study was funded by Clene and FightMND. Dr. Kiernan and Dr. Johnson have no relevant financial disclosures.

An investigational drug that blocks the dopamine-1 (D1) receptor reduces tics and is safe and well tolerated in children with Tourette syndrome, a new study shows.

Importantly, unlike current medications for the disorder, ecocipam does not lead to weight gain, anxiety, depression, or tardive dyskinesia, compared with placebo – a factor that may lead to better adherence.

For clinicians treating children with Tourette syndrome, the results suggest “help is on the way,” said study investigator Donald Gilbert, MD, professor of pediatrics and neurology, University of Cincinnati Children’s Hospital Medical Center.

“There may be a drug available with a new mechanism of action that is effective to suppress tics without causing weight gain or unwanted neuropsychiatric side effects,” Dr. Gilbert said.

The findings will be presented at the 2022 annual meeting of the American Academy of Neurology.
 

First-in-class agent

Tourette syndrome is a neurologic condition that causes sudden repetitive involuntary muscle movements and sounds known as tics. These movements typically develop in childhood and worsen during adolescence.

“There’s a risk of injury, such as to the neck, with tics in childhood, so it’s good to have something that makes tics less severe and less socially impairing in junior high,” said Dr. Gilbert.

While tics generally diminish by adulthood, “about 10% of the patients we see as kids persist into adulthood enough to need medical interventions,” said Dr. Gilbert.

Ecopipam is a first-in-class selective D1 receptor antagonist in clinical development for pediatric patients with Tourette syndrome. The compound was previously tested without success in schizophrenia and in obesity, the idea being that because dopamine is linked to pleasure or reward, blocking it might result in weight loss, said Dr. Gilbert.

However, earlier studies in Tourette syndrome suggested that ecopipam reduces tics in children and adults and had low metabolic and movement-related adverse effects.

Drugs currently used to treat tics include haloperidol, pimocide, and aripiprazole. All of these agents block the dopamine-2 (D2) receptor and can cause weight gain and tardive dyskinesia, said Dr. Gilbert.
 

Placebo-controlled trial

The new study included 149 patients with Tourette syndrome who had a score of at least 20 on the Yale Global Tic Severity Total Tic Score (YGTSS-TTS). The scale measures five aspects of motor and vocal tics: the number, frequency, intensity, complexity, and interference.

With that scale, intensity assesses whether tics cause injury, complexity evaluates the number of muscle group, and interference assesses whether tics interrupt functions, such as speaking or walking.

For each of the five areas, scores range from 0-5, with higher scores indicating greater severity. The motor and vocal parts have a maximum of 25 points each, for a maximum total of 50.

Participants were randomly assigned to receive once-daily oral ecopipam or placebo. A 4-week titration period was followed by an 8-week maintenance period and then a 1-week tapering period.

The primary endpoint was mean change from baseline to week 12 in scores on the YGTSS-TTS.

Results on the YGTSS-TTS showed a significant improvement in the ecopipam group, compared with placebo groups (least square [LS] mean difference: -3.44; 95% confidence interval: -6.09 to -0.79; P = .011).

The analysis indicated a 30% reduction, with an effect size of 0.48, which is “pretty good,” said Dr. Gilbert. “The amount of change is comparable to other drugs that are marketed” to treat tics.

The drug was effective for younger as well as older children. Among those aged 6-11 years, the LS mean difference was -4.95 (95% CI: -9.99 to 0.10; P = .054), and for those aged 12 to 17 years, the LS mean difference was -3.37 (95% CI: -6.51 to -0.24; P = .035).

A key secondary endpoint was the score on the Clinical Global Impression of Tourette Syndrome Severity, which Dr. Gilbert said is a more subjective measure of whether a patient’s life has improved. Here, the mean change at week 12 was significant (P = .001) for the treated group (improvement of 0.91 points), compared with the placebo group (improvement of 0.5 points).

Researchers also assessed safety and tolerability. Treatment-related adverse events (AEs) occurred in 34% of patients taking ecopipam and in 21% of those taking placebo. The most common AEs were headache (9.2%), fatigue (6.6%), somnolence (6.6%), and restlessness (5.3%).

There were no metabolic or movement-related AEs or treatment-related serious AEs.

“This drug doesn’t cause weight gain at all,” said Dr. Gilbert. He noted that there was also no difference in the groups in terms of rates of depression, anxiety, or tardive dyskinesia.
 

Significant tic reduction

Commenting on the findings, Jessica Frey, MD, a movement disorders fellow at the University of Florida, said the new double-blind, placebo-controlled study “is promising” in that it demonstrates significant tic reduction, compared with placebo without significant side effects.

“Ecopipam could potentially expand pharmacologic treatment options for children and adolescents with Tourette syndrome in the near future,” she said.

Dr. Frey will also be presenting results at the meeting of a study showing a significant correlation between tic severity and social media use among adolescents with Tourette syndrome during the COVID pandemic.

She noted that dopamine is an important neurotransmitter in the underlying pathophysiology of Tourette syndrome. In addition, although D2 receptor blockade can provide significant tic reduction, the “intolerable” side effects often linked to medications with this mechanism “can lead to discontinuation,” said Dr. Frey.

She also noted that ecopipam has previously been evaluated in an open-label study and a follow-up placebo-controlled study that demonstrated safety as well as significant tic reduction.

The study was supported by Emalex Biosciences. Dr. Gilbert and Dr. Frey report no relevant financial relationships.

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

An investigational drug that blocks the dopamine-1 (D1) receptor reduces tics and is safe and well tolerated in children with Tourette syndrome, a new study shows.

Importantly, unlike current medications for the disorder, ecocipam does not lead to weight gain, anxiety, depression, or tardive dyskinesia, compared with placebo – a factor that may lead to better adherence.

For clinicians treating children with Tourette syndrome, the results suggest “help is on the way,” said study investigator Donald Gilbert, MD, professor of pediatrics and neurology, University of Cincinnati Children’s Hospital Medical Center.

“There may be a drug available with a new mechanism of action that is effective to suppress tics without causing weight gain or unwanted neuropsychiatric side effects,” Dr. Gilbert said.

The findings will be presented at the 2022 annual meeting of the American Academy of Neurology.
 

First-in-class agent

Tourette syndrome is a neurologic condition that causes sudden repetitive involuntary muscle movements and sounds known as tics. These movements typically develop in childhood and worsen during adolescence.

“There’s a risk of injury, such as to the neck, with tics in childhood, so it’s good to have something that makes tics less severe and less socially impairing in junior high,” said Dr. Gilbert.

While tics generally diminish by adulthood, “about 10% of the patients we see as kids persist into adulthood enough to need medical interventions,” said Dr. Gilbert.

Ecopipam is a first-in-class selective D1 receptor antagonist in clinical development for pediatric patients with Tourette syndrome. The compound was previously tested without success in schizophrenia and in obesity, the idea being that because dopamine is linked to pleasure or reward, blocking it might result in weight loss, said Dr. Gilbert.

However, earlier studies in Tourette syndrome suggested that ecopipam reduces tics in children and adults and had low metabolic and movement-related adverse effects.

Drugs currently used to treat tics include haloperidol, pimocide, and aripiprazole. All of these agents block the dopamine-2 (D2) receptor and can cause weight gain and tardive dyskinesia, said Dr. Gilbert.
 

Placebo-controlled trial

The new study included 149 patients with Tourette syndrome who had a score of at least 20 on the Yale Global Tic Severity Total Tic Score (YGTSS-TTS). The scale measures five aspects of motor and vocal tics: the number, frequency, intensity, complexity, and interference.

With that scale, intensity assesses whether tics cause injury, complexity evaluates the number of muscle group, and interference assesses whether tics interrupt functions, such as speaking or walking.

For each of the five areas, scores range from 0-5, with higher scores indicating greater severity. The motor and vocal parts have a maximum of 25 points each, for a maximum total of 50.

Participants were randomly assigned to receive once-daily oral ecopipam or placebo. A 4-week titration period was followed by an 8-week maintenance period and then a 1-week tapering period.

The primary endpoint was mean change from baseline to week 12 in scores on the YGTSS-TTS.

Results on the YGTSS-TTS showed a significant improvement in the ecopipam group, compared with placebo groups (least square [LS] mean difference: -3.44; 95% confidence interval: -6.09 to -0.79; P = .011).

The analysis indicated a 30% reduction, with an effect size of 0.48, which is “pretty good,” said Dr. Gilbert. “The amount of change is comparable to other drugs that are marketed” to treat tics.

The drug was effective for younger as well as older children. Among those aged 6-11 years, the LS mean difference was -4.95 (95% CI: -9.99 to 0.10; P = .054), and for those aged 12 to 17 years, the LS mean difference was -3.37 (95% CI: -6.51 to -0.24; P = .035).

A key secondary endpoint was the score on the Clinical Global Impression of Tourette Syndrome Severity, which Dr. Gilbert said is a more subjective measure of whether a patient’s life has improved. Here, the mean change at week 12 was significant (P = .001) for the treated group (improvement of 0.91 points), compared with the placebo group (improvement of 0.5 points).

Researchers also assessed safety and tolerability. Treatment-related adverse events (AEs) occurred in 34% of patients taking ecopipam and in 21% of those taking placebo. The most common AEs were headache (9.2%), fatigue (6.6%), somnolence (6.6%), and restlessness (5.3%).

There were no metabolic or movement-related AEs or treatment-related serious AEs.

“This drug doesn’t cause weight gain at all,” said Dr. Gilbert. He noted that there was also no difference in the groups in terms of rates of depression, anxiety, or tardive dyskinesia.
 

Significant tic reduction

Commenting on the findings, Jessica Frey, MD, a movement disorders fellow at the University of Florida, said the new double-blind, placebo-controlled study “is promising” in that it demonstrates significant tic reduction, compared with placebo without significant side effects.

“Ecopipam could potentially expand pharmacologic treatment options for children and adolescents with Tourette syndrome in the near future,” she said.

Dr. Frey will also be presenting results at the meeting of a study showing a significant correlation between tic severity and social media use among adolescents with Tourette syndrome during the COVID pandemic.

She noted that dopamine is an important neurotransmitter in the underlying pathophysiology of Tourette syndrome. In addition, although D2 receptor blockade can provide significant tic reduction, the “intolerable” side effects often linked to medications with this mechanism “can lead to discontinuation,” said Dr. Frey.

She also noted that ecopipam has previously been evaluated in an open-label study and a follow-up placebo-controlled study that demonstrated safety as well as significant tic reduction.

The study was supported by Emalex Biosciences. Dr. Gilbert and Dr. Frey report no relevant financial relationships.

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

An investigational drug that blocks the dopamine-1 (D1) receptor reduces tics and is safe and well tolerated in children with Tourette syndrome, a new study shows.

Importantly, unlike current medications for the disorder, ecocipam does not lead to weight gain, anxiety, depression, or tardive dyskinesia, compared with placebo – a factor that may lead to better adherence.

For clinicians treating children with Tourette syndrome, the results suggest “help is on the way,” said study investigator Donald Gilbert, MD, professor of pediatrics and neurology, University of Cincinnati Children’s Hospital Medical Center.

“There may be a drug available with a new mechanism of action that is effective to suppress tics without causing weight gain or unwanted neuropsychiatric side effects,” Dr. Gilbert said.

The findings will be presented at the 2022 annual meeting of the American Academy of Neurology.
 

First-in-class agent

Tourette syndrome is a neurologic condition that causes sudden repetitive involuntary muscle movements and sounds known as tics. These movements typically develop in childhood and worsen during adolescence.

“There’s a risk of injury, such as to the neck, with tics in childhood, so it’s good to have something that makes tics less severe and less socially impairing in junior high,” said Dr. Gilbert.

While tics generally diminish by adulthood, “about 10% of the patients we see as kids persist into adulthood enough to need medical interventions,” said Dr. Gilbert.

Ecopipam is a first-in-class selective D1 receptor antagonist in clinical development for pediatric patients with Tourette syndrome. The compound was previously tested without success in schizophrenia and in obesity, the idea being that because dopamine is linked to pleasure or reward, blocking it might result in weight loss, said Dr. Gilbert.

However, earlier studies in Tourette syndrome suggested that ecopipam reduces tics in children and adults and had low metabolic and movement-related adverse effects.

Drugs currently used to treat tics include haloperidol, pimocide, and aripiprazole. All of these agents block the dopamine-2 (D2) receptor and can cause weight gain and tardive dyskinesia, said Dr. Gilbert.
 

Placebo-controlled trial

The new study included 149 patients with Tourette syndrome who had a score of at least 20 on the Yale Global Tic Severity Total Tic Score (YGTSS-TTS). The scale measures five aspects of motor and vocal tics: the number, frequency, intensity, complexity, and interference.

With that scale, intensity assesses whether tics cause injury, complexity evaluates the number of muscle group, and interference assesses whether tics interrupt functions, such as speaking or walking.

For each of the five areas, scores range from 0-5, with higher scores indicating greater severity. The motor and vocal parts have a maximum of 25 points each, for a maximum total of 50.

Participants were randomly assigned to receive once-daily oral ecopipam or placebo. A 4-week titration period was followed by an 8-week maintenance period and then a 1-week tapering period.

The primary endpoint was mean change from baseline to week 12 in scores on the YGTSS-TTS.

Results on the YGTSS-TTS showed a significant improvement in the ecopipam group, compared with placebo groups (least square [LS] mean difference: -3.44; 95% confidence interval: -6.09 to -0.79; P = .011).

The analysis indicated a 30% reduction, with an effect size of 0.48, which is “pretty good,” said Dr. Gilbert. “The amount of change is comparable to other drugs that are marketed” to treat tics.

The drug was effective for younger as well as older children. Among those aged 6-11 years, the LS mean difference was -4.95 (95% CI: -9.99 to 0.10; P = .054), and for those aged 12 to 17 years, the LS mean difference was -3.37 (95% CI: -6.51 to -0.24; P = .035).

A key secondary endpoint was the score on the Clinical Global Impression of Tourette Syndrome Severity, which Dr. Gilbert said is a more subjective measure of whether a patient’s life has improved. Here, the mean change at week 12 was significant (P = .001) for the treated group (improvement of 0.91 points), compared with the placebo group (improvement of 0.5 points).

Researchers also assessed safety and tolerability. Treatment-related adverse events (AEs) occurred in 34% of patients taking ecopipam and in 21% of those taking placebo. The most common AEs were headache (9.2%), fatigue (6.6%), somnolence (6.6%), and restlessness (5.3%).

There were no metabolic or movement-related AEs or treatment-related serious AEs.

“This drug doesn’t cause weight gain at all,” said Dr. Gilbert. He noted that there was also no difference in the groups in terms of rates of depression, anxiety, or tardive dyskinesia.
 

Significant tic reduction

Commenting on the findings, Jessica Frey, MD, a movement disorders fellow at the University of Florida, said the new double-blind, placebo-controlled study “is promising” in that it demonstrates significant tic reduction, compared with placebo without significant side effects.

“Ecopipam could potentially expand pharmacologic treatment options for children and adolescents with Tourette syndrome in the near future,” she said.

Dr. Frey will also be presenting results at the meeting of a study showing a significant correlation between tic severity and social media use among adolescents with Tourette syndrome during the COVID pandemic.

She noted that dopamine is an important neurotransmitter in the underlying pathophysiology of Tourette syndrome. In addition, although D2 receptor blockade can provide significant tic reduction, the “intolerable” side effects often linked to medications with this mechanism “can lead to discontinuation,” said Dr. Frey.

She also noted that ecopipam has previously been evaluated in an open-label study and a follow-up placebo-controlled study that demonstrated safety as well as significant tic reduction.

The study was supported by Emalex Biosciences. Dr. Gilbert and Dr. Frey report no relevant financial relationships.

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

Atypical anxiety in adults with Parkinson’s disease ranged from 15% to 51% in a systematic review of 60 studies.

Anxiety is common in Parkinson’s disease (PD) and has been shown to increase functional disability and decrease quality of life, but atypical presentations of anxiety are underrecognized and often undertreated in PD patients, wrote Nadeeka N. Dissanayaka, PhD, of the University of Queensland, Brisbane, Australia, and colleagues.

Courtesy University of Queensland

In a study published in the American Journal of Geriatric Psychiatry , the researchers conducted a systematic review of 60 studies to better characterize atypical PD-related anxiety. Fourteen studies involved Anxiety Not Otherwise Specified (NOS), 31 included fluctuating anxiety symptoms, and 22 included Fear of Falling (FOF).

Overall, the average prevalence rate for anxiety disorders in the PD population was 31%.

Anxiety NOS, fluctuating anxiety, and FOF accounted for a weighted mean prevalence of 14.9%, 34.19%, and 51.5%, respectively.

The symptomatology of anxiety NOS included psychological distress about the PD diagnosis, insecurity about the future, fear of losing control of motor and bodily functions, and social embarrassment. Clinically, anxiety NOS was associated with a range of factors including minor depression, on-off motor symptoms, muscle cramps, poor quality of life, and gait impairment.

The symptomatology of fluctuating anxiety was assessed in 9 studies of the “on” motor state and 16 studies of both “on” and “off.” Symptoms associated with the off state included panic attacks, feeling anxious or sad, and avoiding situations, as well as palpitations, dizziness, chills, and hot flashes.

Clinically, studies showed that anxiety was more severe in the off-medication state, and symptoms were reduced in the on state. Data from some studies showed that fluctuating anxiety was more common in PD patients who were female, and who had a younger age of PD onset and longer disease duration.

The symptomatology of FOF included associations between FOF and difficulty with walking and gait: Using a walker or other device, more frequent freezing in place, hesitation when turning, and slower speed while walking. Clinically, characteristics associated with FOF included older age, needing assistance for activities of daily living, a history of falls, and reduced quality of life.

The results of the review were limited by several factors including the varying assessment techniques, and the lack of data on treatment for atypical anxiety in PD, the researchers noted. “To our knowledge there are no treatment trials focused on Anxiety NOS,” and studies on the treatment of fluctuating anxiety and FOF are preliminary, they said.

However, the results support the need for early identification and classification of PD-related anxiety to improve treatment strategies and long-term outcomes, the researchers concluded. In the absence of evidence-based treatment strategies, “Given the heterogeneity of anxiety presentations in PD, the importance of tailoring interventions to meet the specific needs and unique symptom profiles of each individual cannot be overstated,” and routine screening of PD patients for anxiety every 6-12 months is recommended, they emphasized.

Dr. Dissanayaka disclosed support from the National Health and Medical Research Boosting Dementia Research Leadership Fellowship.

Atypical anxiety in adults with Parkinson’s disease ranged from 15% to 51% in a systematic review of 60 studies.

Anxiety is common in Parkinson’s disease (PD) and has been shown to increase functional disability and decrease quality of life, but atypical presentations of anxiety are underrecognized and often undertreated in PD patients, wrote Nadeeka N. Dissanayaka, PhD, of the University of Queensland, Brisbane, Australia, and colleagues.

Courtesy University of Queensland

In a study published in the American Journal of Geriatric Psychiatry , the researchers conducted a systematic review of 60 studies to better characterize atypical PD-related anxiety. Fourteen studies involved Anxiety Not Otherwise Specified (NOS), 31 included fluctuating anxiety symptoms, and 22 included Fear of Falling (FOF).

Overall, the average prevalence rate for anxiety disorders in the PD population was 31%.

Anxiety NOS, fluctuating anxiety, and FOF accounted for a weighted mean prevalence of 14.9%, 34.19%, and 51.5%, respectively.

The symptomatology of anxiety NOS included psychological distress about the PD diagnosis, insecurity about the future, fear of losing control of motor and bodily functions, and social embarrassment. Clinically, anxiety NOS was associated with a range of factors including minor depression, on-off motor symptoms, muscle cramps, poor quality of life, and gait impairment.

The symptomatology of fluctuating anxiety was assessed in 9 studies of the “on” motor state and 16 studies of both “on” and “off.” Symptoms associated with the off state included panic attacks, feeling anxious or sad, and avoiding situations, as well as palpitations, dizziness, chills, and hot flashes.

Clinically, studies showed that anxiety was more severe in the off-medication state, and symptoms were reduced in the on state. Data from some studies showed that fluctuating anxiety was more common in PD patients who were female, and who had a younger age of PD onset and longer disease duration.

The symptomatology of FOF included associations between FOF and difficulty with walking and gait: Using a walker or other device, more frequent freezing in place, hesitation when turning, and slower speed while walking. Clinically, characteristics associated with FOF included older age, needing assistance for activities of daily living, a history of falls, and reduced quality of life.

The results of the review were limited by several factors including the varying assessment techniques, and the lack of data on treatment for atypical anxiety in PD, the researchers noted. “To our knowledge there are no treatment trials focused on Anxiety NOS,” and studies on the treatment of fluctuating anxiety and FOF are preliminary, they said.

However, the results support the need for early identification and classification of PD-related anxiety to improve treatment strategies and long-term outcomes, the researchers concluded. In the absence of evidence-based treatment strategies, “Given the heterogeneity of anxiety presentations in PD, the importance of tailoring interventions to meet the specific needs and unique symptom profiles of each individual cannot be overstated,” and routine screening of PD patients for anxiety every 6-12 months is recommended, they emphasized.

Dr. Dissanayaka disclosed support from the National Health and Medical Research Boosting Dementia Research Leadership Fellowship.

Atypical anxiety in adults with Parkinson’s disease ranged from 15% to 51% in a systematic review of 60 studies.

Anxiety is common in Parkinson’s disease (PD) and has been shown to increase functional disability and decrease quality of life, but atypical presentations of anxiety are underrecognized and often undertreated in PD patients, wrote Nadeeka N. Dissanayaka, PhD, of the University of Queensland, Brisbane, Australia, and colleagues.

Courtesy University of Queensland

In a study published in the American Journal of Geriatric Psychiatry , the researchers conducted a systematic review of 60 studies to better characterize atypical PD-related anxiety. Fourteen studies involved Anxiety Not Otherwise Specified (NOS), 31 included fluctuating anxiety symptoms, and 22 included Fear of Falling (FOF).

Overall, the average prevalence rate for anxiety disorders in the PD population was 31%.

Anxiety NOS, fluctuating anxiety, and FOF accounted for a weighted mean prevalence of 14.9%, 34.19%, and 51.5%, respectively.

The symptomatology of anxiety NOS included psychological distress about the PD diagnosis, insecurity about the future, fear of losing control of motor and bodily functions, and social embarrassment. Clinically, anxiety NOS was associated with a range of factors including minor depression, on-off motor symptoms, muscle cramps, poor quality of life, and gait impairment.

The symptomatology of fluctuating anxiety was assessed in 9 studies of the “on” motor state and 16 studies of both “on” and “off.” Symptoms associated with the off state included panic attacks, feeling anxious or sad, and avoiding situations, as well as palpitations, dizziness, chills, and hot flashes.

Clinically, studies showed that anxiety was more severe in the off-medication state, and symptoms were reduced in the on state. Data from some studies showed that fluctuating anxiety was more common in PD patients who were female, and who had a younger age of PD onset and longer disease duration.

The symptomatology of FOF included associations between FOF and difficulty with walking and gait: Using a walker or other device, more frequent freezing in place, hesitation when turning, and slower speed while walking. Clinically, characteristics associated with FOF included older age, needing assistance for activities of daily living, a history of falls, and reduced quality of life.

The results of the review were limited by several factors including the varying assessment techniques, and the lack of data on treatment for atypical anxiety in PD, the researchers noted. “To our knowledge there are no treatment trials focused on Anxiety NOS,” and studies on the treatment of fluctuating anxiety and FOF are preliminary, they said.

However, the results support the need for early identification and classification of PD-related anxiety to improve treatment strategies and long-term outcomes, the researchers concluded. In the absence of evidence-based treatment strategies, “Given the heterogeneity of anxiety presentations in PD, the importance of tailoring interventions to meet the specific needs and unique symptom profiles of each individual cannot be overstated,” and routine screening of PD patients for anxiety every 6-12 months is recommended, they emphasized.

Dr. Dissanayaka disclosed support from the National Health and Medical Research Boosting Dementia Research Leadership Fellowship.

A panel of experts that advises the FDA narrowly voted to reject a new drug intended to treat amyotrophic lateral scelrosis (ALS). Six of 10 members of the FDA Peripheral and Central Nervous System Drugs Advisory Committee decided there is not enough evidence to support approval of the drug from Amylyx Pharmaceuticals. The evidence from a single phase 2 trial is insufficient, the panel said.

The fate of the drug, known as AMX0035, and the panel’s vote, has been closely watched as new treatments for this devastating disease are greatly needed. Committee members said they were moved by passionate testimony from patients, caregivers, and others. But, they believe the evidence does not meet the required standard for FDA approval.

“We were asked to look for substantial evidence of persuasiveness and robustness, and I think this one trial doesn’t quite meet that bar and was problematic,” said Kenneth Fischbeck, MD, investigator with the National Institute of Neurological Disorders and Stroke. “It would be a disservice to patients and their families to move ahead and approve a treatment that is of uncertain benefit,” said Dr. Fischbeck.

The committee’s vote is not binding. While the FDA often follows its advisors’ decisions, the agency last year approved a controversial new drug for Alzheimer’s disease after a similar advisory committee voted against it.
 

Phase 3 study in the works

This new ALS drug was shown to slow the decline caused by ALS, sometimes known as Lou Gehrig’s disease, Jamie Timmons, MD, head of scientific communications at Amylyx Pharmaceuticals, said. The study found the drug slowed decline by 25%, compared with patients taking a placebo. That change is considered clinically meaningful.

This is the first time a treatment has shown a benefit on both function and survival in ALS, the two key measures in a relentlessly progressive, fatal disease, said Joshua Cohen, co-CEO and co-founder of Amylyx.

During the meeting, patients with ALS said they were willing to accept greater risk for the possibility of having even a little more time with their loved ones and argued that the drug contains two compounds that are already available. They pleaded for the FDA to exercise its regulatory flexibility in approving this experimental drug.

However, the FDA panel raised a number of issues with the trial. These concerns included the study’s small sample size and no survival benefit at 24 weeks.

Many panel members said they hope an ongoing phase III trial will be more definitive because it’s so much larger. The results of that trial are expected by early 2024.

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

A panel of experts that advises the FDA narrowly voted to reject a new drug intended to treat amyotrophic lateral scelrosis (ALS). Six of 10 members of the FDA Peripheral and Central Nervous System Drugs Advisory Committee decided there is not enough evidence to support approval of the drug from Amylyx Pharmaceuticals. The evidence from a single phase 2 trial is insufficient, the panel said.

The fate of the drug, known as AMX0035, and the panel’s vote, has been closely watched as new treatments for this devastating disease are greatly needed. Committee members said they were moved by passionate testimony from patients, caregivers, and others. But, they believe the evidence does not meet the required standard for FDA approval.

“We were asked to look for substantial evidence of persuasiveness and robustness, and I think this one trial doesn’t quite meet that bar and was problematic,” said Kenneth Fischbeck, MD, investigator with the National Institute of Neurological Disorders and Stroke. “It would be a disservice to patients and their families to move ahead and approve a treatment that is of uncertain benefit,” said Dr. Fischbeck.

The committee’s vote is not binding. While the FDA often follows its advisors’ decisions, the agency last year approved a controversial new drug for Alzheimer’s disease after a similar advisory committee voted against it.
 

Phase 3 study in the works

This new ALS drug was shown to slow the decline caused by ALS, sometimes known as Lou Gehrig’s disease, Jamie Timmons, MD, head of scientific communications at Amylyx Pharmaceuticals, said. The study found the drug slowed decline by 25%, compared with patients taking a placebo. That change is considered clinically meaningful.

This is the first time a treatment has shown a benefit on both function and survival in ALS, the two key measures in a relentlessly progressive, fatal disease, said Joshua Cohen, co-CEO and co-founder of Amylyx.

During the meeting, patients with ALS said they were willing to accept greater risk for the possibility of having even a little more time with their loved ones and argued that the drug contains two compounds that are already available. They pleaded for the FDA to exercise its regulatory flexibility in approving this experimental drug.

However, the FDA panel raised a number of issues with the trial. These concerns included the study’s small sample size and no survival benefit at 24 weeks.

Many panel members said they hope an ongoing phase III trial will be more definitive because it’s so much larger. The results of that trial are expected by early 2024.

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

A panel of experts that advises the FDA narrowly voted to reject a new drug intended to treat amyotrophic lateral scelrosis (ALS). Six of 10 members of the FDA Peripheral and Central Nervous System Drugs Advisory Committee decided there is not enough evidence to support approval of the drug from Amylyx Pharmaceuticals. The evidence from a single phase 2 trial is insufficient, the panel said.

The fate of the drug, known as AMX0035, and the panel’s vote, has been closely watched as new treatments for this devastating disease are greatly needed. Committee members said they were moved by passionate testimony from patients, caregivers, and others. But, they believe the evidence does not meet the required standard for FDA approval.

“We were asked to look for substantial evidence of persuasiveness and robustness, and I think this one trial doesn’t quite meet that bar and was problematic,” said Kenneth Fischbeck, MD, investigator with the National Institute of Neurological Disorders and Stroke. “It would be a disservice to patients and their families to move ahead and approve a treatment that is of uncertain benefit,” said Dr. Fischbeck.

The committee’s vote is not binding. While the FDA often follows its advisors’ decisions, the agency last year approved a controversial new drug for Alzheimer’s disease after a similar advisory committee voted against it.
 

Phase 3 study in the works

This new ALS drug was shown to slow the decline caused by ALS, sometimes known as Lou Gehrig’s disease, Jamie Timmons, MD, head of scientific communications at Amylyx Pharmaceuticals, said. The study found the drug slowed decline by 25%, compared with patients taking a placebo. That change is considered clinically meaningful.

This is the first time a treatment has shown a benefit on both function and survival in ALS, the two key measures in a relentlessly progressive, fatal disease, said Joshua Cohen, co-CEO and co-founder of Amylyx.

During the meeting, patients with ALS said they were willing to accept greater risk for the possibility of having even a little more time with their loved ones and argued that the drug contains two compounds that are already available. They pleaded for the FDA to exercise its regulatory flexibility in approving this experimental drug.

However, the FDA panel raised a number of issues with the trial. These concerns included the study’s small sample size and no survival benefit at 24 weeks.

Many panel members said they hope an ongoing phase III trial will be more definitive because it’s so much larger. The results of that trial are expected by early 2024.

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

Tremors and memory symptoms were identified among individuals in a primary care setting as early as 10 years before a Parkinson’s disease diagnosis in a new study.

Most research on the causes and early signs of Parkinson’s disease (PD) have involved patients of Northern European ancestry, Cristina Simonet, MD, of Queen Mary University of London, and colleagues wrote in their paper, published in JAMA Neurology.

Additionally, data on how PD might manifest in different ethnic groups are limited, they said.

In their nested case-control, the researchers examined data from electronic health records of an ethnically diverse population of 1,016,277 adults seen in primary care practices between 1990 and Feb. 6, 2018. They compared individuals with PD with those without PD or other neurologic conditions.

The researchers identified 10 age and sex-matched controls for each PD case, and also conducted an unmatched analysis after adjusting for age and sex. The final study population included 1,055 patients with PD and 1,009,523 controls. The population of PD cases was 15.7% Black, 19.7% South Asian, 50.9% White, and 8.3% other; the population of controls was 13.3% Black, 21.5% South Asian, 43.7% White, and 11.3% other.

“We observed a constellation of symptoms noted by general practitioners up to a decade before diagnosis of PD,” the researchers said. Symptoms were identified across three time intervals (less than 2 years, 2-5 years, and 5-10 years before diagnosis) to better evaluate exposure outcome associations.

In the matched analysis of midlife risk factors, epilepsy showed the strongest association with PD diagnosis across all time periods, and type 2 diabetes or hypertension 5-10 years before diagnosis was associated with later PD.

Prediagnostic signs of PD included both motor and nonmotor manifestations.

The matched analysis revealed a significant increased association between tremor and memory symptoms less than 2 years before diagnosis (adjusted odds ratios of 151.24 and 8.73, respectively) as well as up to 10 years before diagnosis for tremors and up to 5 years for memory symptoms (aOR, 11.4 and 3.09, respectively) in PD patients, compared with controls.

Other strong associations between PD and early nonmotor features in cases, compared with controls, included hypotension (aOR, 6.81), constipation (aOR, 3.29), and depression (aOR, 4.61).

In addition, the researchers found associations for epilepsy that had not been identified in previous studies, and these associations persisted in a replication analysis.

The study findings were limited by several factors, mainly the use of routine primary care data with underascertained factors of interest, and potential mislabeling of PD, the researchers noted. Other limitations included the lack of data on prescription medication for PD, and the recording of memory problems in primary care without supportive testing to confirm cognitive impairment.

The results support a range of comorbidities and symptoms that may present in primary care, and clinicians should consider PD as a possible cause, the researchers wrote.
 

Make early referral a priority

The study is important because of the lack of diversity in Parkinson’s disease research, lead author Dr. Simonet said in an interview.

“Over the last decade, the global population suffering from Parkinson’s disease has more than doubled,” she said. Causes may include the increasing numbers of older people with longer life expectancy. “However, it seems there are other factors, including environmental, genetic, and lifestyle, that might play a role in increasing the prevalence of Parkinson’s disease.”

“More representative studies, including minority ethnic groups and those living in areas of high social and economic deprivation, are needed,” Dr. Simonet emphasized.

She said that there is little research on the association with epilepsy and hearing loss in early PD, and “for that reason, our results should encourage further studies to confirm a possible link between these manifestations and Parkinson’s disease.”
 

Early detection may drive better diagnoses

The current study is important for understanding the prediagnostic features and risk factors that may allow for earlier detection of Parkinson’s disease, William Hung, MD, a geriatrics and palliative care specialist of the Icahn School of Medicine at Mount Sinai, New York, said in an interview. “Prior to this study, there was limited understanding of these features.

“One surprise [in the findings] was that ethnicity and socioeconomic deprivation do not appear to be associated with the risk of PD, in contrast to other illnesses such as dementia,” said Dr. Hung. “The array of prediagnostic features associated with PD is not surprising, but nonetheless important for clinicians to know to consider whether PD could be the underlying cause.”

The take-home message for primary care is that “there are features, such as hearing loss, history of epilepsy, autonomic symptoms, motor symptoms, among others, for which clinicians should consider PD as part of the differential diagnosis as underlying cause and consider referral to specialists for diagnostic clarification,” said Dr. Hung.

“Additional research is needed to translate these findings to care, perhaps developing decision aids, interventions that may help with diagnosis and evaluation,” as is work on understanding the link between PD and symptoms such as hearing loss and epilepsy, he said.
 

Primary care offers opportunity to identify risk factors

The current study represents an important step in early recognition of PD, with implications for helping patients access treatments promptly and improve their quality of life, Bhavana Patel, DO, Shannon Chiu, MD, and Melissa J. Armstrong, MD, of the University of Florida, Gainesville, wrote in an accompanying editorial.

“The primary care setting is commonly where symptoms heralding the onset of PD are first discussed. However, little is known regarding the prediagnostic manifestations of PD that are seen in primary care clinics, particularly in underserved populations,” they wrote.

The study included many risk factors and prodromal markers associated with research criteria for prodromal PD, but did not include several risk and prodromal markers in the Movement Disorders Society research criteria, “such as symptoms suggestive of REM sleep behavior disorder, excessive daytime sleepiness (which overlaps with, but is distinct from, fatigue), urinary dysfunction, pesticide and solvent exposure, caffeine use, level of physical activity, and family history,” they said.

Even in individuals with diagnosed PD, certain symptoms, particularly nonmotor symptoms, are commonly underreported,” and primary care clinicians may not recognize these symptoms as PD risk factors, the authors noted.

However, “in addition to contributing to possible models of modifiable risk factors for PD, study results may also further inform algorithms designed to predict PD diagnoses in primary care,” they said. The study also highlights the need for more multivariable models to better identify PD risk factors and strategies for early identification of PD in primary care.

Several study coauthors received funding related to the study from Barts Charity, Health Data Research UK, the Department of Health and Social Care (England) and the devolved administrations, and leading medical research charities, as well as the National Institute for Health Research UCLH Biomedical Research Centre. Lead author Dr. Simonet and Dr. Hung had no financial conflicts to disclose. Dr. Patel disclosed support from the National Institute on Aging, the Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia, and the American Brain Foundation and the Mary E. Groff Charitable Trust. Dr. Chiu reported receiving grants from Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia and the Smallwood Foundation. Dr. Armstrong disclosed funding from the National Institute on Aging, the Florida Department of Health, the Lewy Body Dementia Association, the Alzheimer’s Therapeutic Research Institute/Alzheimer’s Clinical Trial Consortium, the Alzheimer’s Disease Cooperative Study as Data Safety Monitoring Board the Parkinson’s Foundation, and the American Academy of Neurology.

Tremors and memory symptoms were identified among individuals in a primary care setting as early as 10 years before a Parkinson’s disease diagnosis in a new study.

Most research on the causes and early signs of Parkinson’s disease (PD) have involved patients of Northern European ancestry, Cristina Simonet, MD, of Queen Mary University of London, and colleagues wrote in their paper, published in JAMA Neurology.

Additionally, data on how PD might manifest in different ethnic groups are limited, they said.

In their nested case-control, the researchers examined data from electronic health records of an ethnically diverse population of 1,016,277 adults seen in primary care practices between 1990 and Feb. 6, 2018. They compared individuals with PD with those without PD or other neurologic conditions.

The researchers identified 10 age and sex-matched controls for each PD case, and also conducted an unmatched analysis after adjusting for age and sex. The final study population included 1,055 patients with PD and 1,009,523 controls. The population of PD cases was 15.7% Black, 19.7% South Asian, 50.9% White, and 8.3% other; the population of controls was 13.3% Black, 21.5% South Asian, 43.7% White, and 11.3% other.

“We observed a constellation of symptoms noted by general practitioners up to a decade before diagnosis of PD,” the researchers said. Symptoms were identified across three time intervals (less than 2 years, 2-5 years, and 5-10 years before diagnosis) to better evaluate exposure outcome associations.

In the matched analysis of midlife risk factors, epilepsy showed the strongest association with PD diagnosis across all time periods, and type 2 diabetes or hypertension 5-10 years before diagnosis was associated with later PD.

Prediagnostic signs of PD included both motor and nonmotor manifestations.

The matched analysis revealed a significant increased association between tremor and memory symptoms less than 2 years before diagnosis (adjusted odds ratios of 151.24 and 8.73, respectively) as well as up to 10 years before diagnosis for tremors and up to 5 years for memory symptoms (aOR, 11.4 and 3.09, respectively) in PD patients, compared with controls.

Other strong associations between PD and early nonmotor features in cases, compared with controls, included hypotension (aOR, 6.81), constipation (aOR, 3.29), and depression (aOR, 4.61).

In addition, the researchers found associations for epilepsy that had not been identified in previous studies, and these associations persisted in a replication analysis.

The study findings were limited by several factors, mainly the use of routine primary care data with underascertained factors of interest, and potential mislabeling of PD, the researchers noted. Other limitations included the lack of data on prescription medication for PD, and the recording of memory problems in primary care without supportive testing to confirm cognitive impairment.

The results support a range of comorbidities and symptoms that may present in primary care, and clinicians should consider PD as a possible cause, the researchers wrote.
 

Make early referral a priority

The study is important because of the lack of diversity in Parkinson’s disease research, lead author Dr. Simonet said in an interview.

“Over the last decade, the global population suffering from Parkinson’s disease has more than doubled,” she said. Causes may include the increasing numbers of older people with longer life expectancy. “However, it seems there are other factors, including environmental, genetic, and lifestyle, that might play a role in increasing the prevalence of Parkinson’s disease.”

“More representative studies, including minority ethnic groups and those living in areas of high social and economic deprivation, are needed,” Dr. Simonet emphasized.

She said that there is little research on the association with epilepsy and hearing loss in early PD, and “for that reason, our results should encourage further studies to confirm a possible link between these manifestations and Parkinson’s disease.”
 

Early detection may drive better diagnoses

The current study is important for understanding the prediagnostic features and risk factors that may allow for earlier detection of Parkinson’s disease, William Hung, MD, a geriatrics and palliative care specialist of the Icahn School of Medicine at Mount Sinai, New York, said in an interview. “Prior to this study, there was limited understanding of these features.

“One surprise [in the findings] was that ethnicity and socioeconomic deprivation do not appear to be associated with the risk of PD, in contrast to other illnesses such as dementia,” said Dr. Hung. “The array of prediagnostic features associated with PD is not surprising, but nonetheless important for clinicians to know to consider whether PD could be the underlying cause.”

The take-home message for primary care is that “there are features, such as hearing loss, history of epilepsy, autonomic symptoms, motor symptoms, among others, for which clinicians should consider PD as part of the differential diagnosis as underlying cause and consider referral to specialists for diagnostic clarification,” said Dr. Hung.

“Additional research is needed to translate these findings to care, perhaps developing decision aids, interventions that may help with diagnosis and evaluation,” as is work on understanding the link between PD and symptoms such as hearing loss and epilepsy, he said.
 

Primary care offers opportunity to identify risk factors

The current study represents an important step in early recognition of PD, with implications for helping patients access treatments promptly and improve their quality of life, Bhavana Patel, DO, Shannon Chiu, MD, and Melissa J. Armstrong, MD, of the University of Florida, Gainesville, wrote in an accompanying editorial.

“The primary care setting is commonly where symptoms heralding the onset of PD are first discussed. However, little is known regarding the prediagnostic manifestations of PD that are seen in primary care clinics, particularly in underserved populations,” they wrote.

The study included many risk factors and prodromal markers associated with research criteria for prodromal PD, but did not include several risk and prodromal markers in the Movement Disorders Society research criteria, “such as symptoms suggestive of REM sleep behavior disorder, excessive daytime sleepiness (which overlaps with, but is distinct from, fatigue), urinary dysfunction, pesticide and solvent exposure, caffeine use, level of physical activity, and family history,” they said.

Even in individuals with diagnosed PD, certain symptoms, particularly nonmotor symptoms, are commonly underreported,” and primary care clinicians may not recognize these symptoms as PD risk factors, the authors noted.

However, “in addition to contributing to possible models of modifiable risk factors for PD, study results may also further inform algorithms designed to predict PD diagnoses in primary care,” they said. The study also highlights the need for more multivariable models to better identify PD risk factors and strategies for early identification of PD in primary care.

Several study coauthors received funding related to the study from Barts Charity, Health Data Research UK, the Department of Health and Social Care (England) and the devolved administrations, and leading medical research charities, as well as the National Institute for Health Research UCLH Biomedical Research Centre. Lead author Dr. Simonet and Dr. Hung had no financial conflicts to disclose. Dr. Patel disclosed support from the National Institute on Aging, the Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia, and the American Brain Foundation and the Mary E. Groff Charitable Trust. Dr. Chiu reported receiving grants from Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia and the Smallwood Foundation. Dr. Armstrong disclosed funding from the National Institute on Aging, the Florida Department of Health, the Lewy Body Dementia Association, the Alzheimer’s Therapeutic Research Institute/Alzheimer’s Clinical Trial Consortium, the Alzheimer’s Disease Cooperative Study as Data Safety Monitoring Board the Parkinson’s Foundation, and the American Academy of Neurology.

Tremors and memory symptoms were identified among individuals in a primary care setting as early as 10 years before a Parkinson’s disease diagnosis in a new study.

Most research on the causes and early signs of Parkinson’s disease (PD) have involved patients of Northern European ancestry, Cristina Simonet, MD, of Queen Mary University of London, and colleagues wrote in their paper, published in JAMA Neurology.

Additionally, data on how PD might manifest in different ethnic groups are limited, they said.

In their nested case-control, the researchers examined data from electronic health records of an ethnically diverse population of 1,016,277 adults seen in primary care practices between 1990 and Feb. 6, 2018. They compared individuals with PD with those without PD or other neurologic conditions.

The researchers identified 10 age and sex-matched controls for each PD case, and also conducted an unmatched analysis after adjusting for age and sex. The final study population included 1,055 patients with PD and 1,009,523 controls. The population of PD cases was 15.7% Black, 19.7% South Asian, 50.9% White, and 8.3% other; the population of controls was 13.3% Black, 21.5% South Asian, 43.7% White, and 11.3% other.

“We observed a constellation of symptoms noted by general practitioners up to a decade before diagnosis of PD,” the researchers said. Symptoms were identified across three time intervals (less than 2 years, 2-5 years, and 5-10 years before diagnosis) to better evaluate exposure outcome associations.

In the matched analysis of midlife risk factors, epilepsy showed the strongest association with PD diagnosis across all time periods, and type 2 diabetes or hypertension 5-10 years before diagnosis was associated with later PD.

Prediagnostic signs of PD included both motor and nonmotor manifestations.

The matched analysis revealed a significant increased association between tremor and memory symptoms less than 2 years before diagnosis (adjusted odds ratios of 151.24 and 8.73, respectively) as well as up to 10 years before diagnosis for tremors and up to 5 years for memory symptoms (aOR, 11.4 and 3.09, respectively) in PD patients, compared with controls.

Other strong associations between PD and early nonmotor features in cases, compared with controls, included hypotension (aOR, 6.81), constipation (aOR, 3.29), and depression (aOR, 4.61).

In addition, the researchers found associations for epilepsy that had not been identified in previous studies, and these associations persisted in a replication analysis.

The study findings were limited by several factors, mainly the use of routine primary care data with underascertained factors of interest, and potential mislabeling of PD, the researchers noted. Other limitations included the lack of data on prescription medication for PD, and the recording of memory problems in primary care without supportive testing to confirm cognitive impairment.

The results support a range of comorbidities and symptoms that may present in primary care, and clinicians should consider PD as a possible cause, the researchers wrote.
 

Make early referral a priority

The study is important because of the lack of diversity in Parkinson’s disease research, lead author Dr. Simonet said in an interview.

“Over the last decade, the global population suffering from Parkinson’s disease has more than doubled,” she said. Causes may include the increasing numbers of older people with longer life expectancy. “However, it seems there are other factors, including environmental, genetic, and lifestyle, that might play a role in increasing the prevalence of Parkinson’s disease.”

“More representative studies, including minority ethnic groups and those living in areas of high social and economic deprivation, are needed,” Dr. Simonet emphasized.

She said that there is little research on the association with epilepsy and hearing loss in early PD, and “for that reason, our results should encourage further studies to confirm a possible link between these manifestations and Parkinson’s disease.”
 

Early detection may drive better diagnoses

The current study is important for understanding the prediagnostic features and risk factors that may allow for earlier detection of Parkinson’s disease, William Hung, MD, a geriatrics and palliative care specialist of the Icahn School of Medicine at Mount Sinai, New York, said in an interview. “Prior to this study, there was limited understanding of these features.

“One surprise [in the findings] was that ethnicity and socioeconomic deprivation do not appear to be associated with the risk of PD, in contrast to other illnesses such as dementia,” said Dr. Hung. “The array of prediagnostic features associated with PD is not surprising, but nonetheless important for clinicians to know to consider whether PD could be the underlying cause.”

The take-home message for primary care is that “there are features, such as hearing loss, history of epilepsy, autonomic symptoms, motor symptoms, among others, for which clinicians should consider PD as part of the differential diagnosis as underlying cause and consider referral to specialists for diagnostic clarification,” said Dr. Hung.

“Additional research is needed to translate these findings to care, perhaps developing decision aids, interventions that may help with diagnosis and evaluation,” as is work on understanding the link between PD and symptoms such as hearing loss and epilepsy, he said.
 

Primary care offers opportunity to identify risk factors

The current study represents an important step in early recognition of PD, with implications for helping patients access treatments promptly and improve their quality of life, Bhavana Patel, DO, Shannon Chiu, MD, and Melissa J. Armstrong, MD, of the University of Florida, Gainesville, wrote in an accompanying editorial.

“The primary care setting is commonly where symptoms heralding the onset of PD are first discussed. However, little is known regarding the prediagnostic manifestations of PD that are seen in primary care clinics, particularly in underserved populations,” they wrote.

The study included many risk factors and prodromal markers associated with research criteria for prodromal PD, but did not include several risk and prodromal markers in the Movement Disorders Society research criteria, “such as symptoms suggestive of REM sleep behavior disorder, excessive daytime sleepiness (which overlaps with, but is distinct from, fatigue), urinary dysfunction, pesticide and solvent exposure, caffeine use, level of physical activity, and family history,” they said.

Even in individuals with diagnosed PD, certain symptoms, particularly nonmotor symptoms, are commonly underreported,” and primary care clinicians may not recognize these symptoms as PD risk factors, the authors noted.

However, “in addition to contributing to possible models of modifiable risk factors for PD, study results may also further inform algorithms designed to predict PD diagnoses in primary care,” they said. The study also highlights the need for more multivariable models to better identify PD risk factors and strategies for early identification of PD in primary care.

Several study coauthors received funding related to the study from Barts Charity, Health Data Research UK, the Department of Health and Social Care (England) and the devolved administrations, and leading medical research charities, as well as the National Institute for Health Research UCLH Biomedical Research Centre. Lead author Dr. Simonet and Dr. Hung had no financial conflicts to disclose. Dr. Patel disclosed support from the National Institute on Aging, the Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia, and the American Brain Foundation and the Mary E. Groff Charitable Trust. Dr. Chiu reported receiving grants from Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia and the Smallwood Foundation. Dr. Armstrong disclosed funding from the National Institute on Aging, the Florida Department of Health, the Lewy Body Dementia Association, the Alzheimer’s Therapeutic Research Institute/Alzheimer’s Clinical Trial Consortium, the Alzheimer’s Disease Cooperative Study as Data Safety Monitoring Board the Parkinson’s Foundation, and the American Academy of Neurology.

LAS VEGAS – Someday, pharmacogenomics will advance precision psychiatry, but in the opinion of Erika L. Nurmi, MD, PhD, routine use of genetic testing to guide clinical treatment decisions is not indicated.

“It’s misleading to rely on results of genetic tests to drive clinical treatment,” Dr. Nurmi, a child and adolescent psychiatrist in the department of psychiatry and biobehavioral sciences at the University of California, Los Angeles, said during an annual psychopharmacology update held by the Nevada Psychiatric Association. “There’s a lot of hope and promise there. But currently, we only know the tip of the iceberg about how drugs work and the genetics influencing these effects. Current testing is probably a very poor reflection of the complexity of drug effects.”

According to Dr. Nurmi, there are at least 165 Food and Drug Administration–approved drugs with pharmacogenetic information on 64 different biomarkers – 37% with CYP p450 notations. Of these, 32 psychiatric drugs have pharmacogenetic information, and most of them are dosing recommendations based on whether a patient has the variant. However, there is wide public acceptance of genetic testing in preventing the wrong drug from being used, in selecting the best drug dose, and avoiding side effects (Pharmacogenomics 2012;12[3]:197-204). “Most people have a lot of hope [for genetic testing in psychiatry],” Dr. Nurmi said. “But is the science really there? It doesn’t matter, because these companies are doing it, and you are being shown these reports from patients. Whether or not the science supports it, we’re going to have to interpret these reports and explain them to our patients – even if we don’t order them.”

Currently, she continued, clinicians practice trial and error prescribing where they might try one treatment in a class that they think that will work based on previous literature. If nothing works, they try another one. If that’s intolerable, they try a third treatment, and so on. “When we finally find the right treatment, it can take some time to get the dosing right,” Dr. Nurmi said. “So, it can take many months to get a child on the right medication. Precision treatment, on the other hand, would start off by taking a saliva or blood sample to get a printout that lets physicians know which drugs might be used with caution because they might lack efficacy at standard doses, which ones would likely have adverse effects at standard doses, and which are the best choices and what are the dosing recommendations for those choices. If we could get all the information to guide us, that would be a useful product, but right now, we don’t know enough to be able to make these determinations.”

Current evidence-based genetic testing supports a limited role for CYP2D6 and CYP2C19 genotyping because most psychiatric drugs are metabolized by those two enzymes. Poor metabolizers have two dysfunctional copies of the enzyme-encoding gene. This results in increased drug plasma levels with a potentially increased rate of adverse effects.

“Intermediate and extensive metabolizers usually have a normal phenotype, but you can also have ultrarapid metabolizers who have duplications or other enhancing mutations of the CYP gene,” Dr. Nurmi said. “This can result in lower bioavailability and possibly efficacy. Psychiatrists treat poor metabolizers and ultrarapid metabolizers all the time, because the variants are very common.” An estimated 10% of White people are poor metabolizers at the CYP2D6 gene while about 7% are ultrarapid metabolizers. At the same time, an estimated 20% of Asians, Africans, and Whites are poor metabolizers at the CYP2C19 gene. “So, you’re seeing a lot of this in your practice, and you’re probably changing dosing based on genetic differences in metabolism,” she said.

The only FDA pharmacodynamic treatment guideline is for the risk of Stevens-Johnson syndrome (SJS) with the use of carbamazepine. In a study of 44 patients with SJS, all were positive for the HLA-B*1502 variant, compared with 3% of carbamazepine-tolerant patients (Nature 2004;428[6982]:486). The frequency of carrying this variant is an estimated 1:10,000 among Whites and 1:1,000 among Asians. In 2007, the FDA recommended that patients of Asian ancestry should be screened for HLA-B*1502 prior to starting carbamazepine.

Genetic variation also predicts clinical outcome with atomoxetine use. “Most child psychiatrists I know think atomoxetine doesn’t work as a second-line nonstimulant medication for ADHD,” Dr. Nurmi said. “I’d like to convince you that why you think it doesn’t work is because of the genetics.” In a study published in 2019, Dr. Nurmi and colleagues reviewed medical literature and provided therapeutic recommendations for atomoxetine therapy based on CYP2D6 genotype (Clin Pharmacol Ther 2019 Jul;106[1]:94-102). They observed 10- to 30-fold plasma differences in drug exposure between normal metabolizers and poor metabolizers.

“Poor metabolizers therefore get more benefit, but they are also going to get more side effects,” she said. “FDA recommended doses are inadequate for normal metabolizers, so they had to make guidelines based on poor metabolizers because there would be too much risk for them at higher doses. One-third of individuals require doses above the FDA limit to achieve a therapeutic drug level.”

Dr. Nurmi warned that the existing evidence base for using these genetic tests in children “is really poor. There is no data in adults with any diagnosis other than depression, and even those studies are plagued by concerns. When you’re implementing decision support tools in your practice, the key factors are patient presentation, history and symptoms, your clinical skills, the evidence base, FDA recommendations, and patient autonomy. Appropriate incorporation of genetic data should include avoiding a medication with high toxicity (like SJS), titration planning (dose and titration speed adjustments), and choosing between medications in the same class with an indication or evidence base for the target disorder.” She added that while the benefit of current genetic testing is limited, it may help some patients feel more comfortable tolerating a medication. “For example, being able to tell someone with anxiety that their genetics suggests that they will not have side effects could be very powerful,” she said.

In a 2018 safety communication, the FDA warned the public about its concerns with companies making claims about how to use genetic test results to manage medication treatments that are not supported by recommendations in the FDA-approved drug labeling or other scientific evidence. The American Academy of Child and Adolescent Psychiatry also published a guide for patients and families.

Dr. Nurmi disclosed that she is an unpaid advisory board member for Myriad Genetics and the Tourette Association of America, a paid adviser for Teva Pharmaceuticals, and a recipient of research support from Emalex Pharmaceuticals. She has received research funding from the National Institutes Health, the International OCD Foundation, the Tourette Association of America, and the Brain & Behavior Research Foundation.

LAS VEGAS – Someday, pharmacogenomics will advance precision psychiatry, but in the opinion of Erika L. Nurmi, MD, PhD, routine use of genetic testing to guide clinical treatment decisions is not indicated.

“It’s misleading to rely on results of genetic tests to drive clinical treatment,” Dr. Nurmi, a child and adolescent psychiatrist in the department of psychiatry and biobehavioral sciences at the University of California, Los Angeles, said during an annual psychopharmacology update held by the Nevada Psychiatric Association. “There’s a lot of hope and promise there. But currently, we only know the tip of the iceberg about how drugs work and the genetics influencing these effects. Current testing is probably a very poor reflection of the complexity of drug effects.”

According to Dr. Nurmi, there are at least 165 Food and Drug Administration–approved drugs with pharmacogenetic information on 64 different biomarkers – 37% with CYP p450 notations. Of these, 32 psychiatric drugs have pharmacogenetic information, and most of them are dosing recommendations based on whether a patient has the variant. However, there is wide public acceptance of genetic testing in preventing the wrong drug from being used, in selecting the best drug dose, and avoiding side effects (Pharmacogenomics 2012;12[3]:197-204). “Most people have a lot of hope [for genetic testing in psychiatry],” Dr. Nurmi said. “But is the science really there? It doesn’t matter, because these companies are doing it, and you are being shown these reports from patients. Whether or not the science supports it, we’re going to have to interpret these reports and explain them to our patients – even if we don’t order them.”

Currently, she continued, clinicians practice trial and error prescribing where they might try one treatment in a class that they think that will work based on previous literature. If nothing works, they try another one. If that’s intolerable, they try a third treatment, and so on. “When we finally find the right treatment, it can take some time to get the dosing right,” Dr. Nurmi said. “So, it can take many months to get a child on the right medication. Precision treatment, on the other hand, would start off by taking a saliva or blood sample to get a printout that lets physicians know which drugs might be used with caution because they might lack efficacy at standard doses, which ones would likely have adverse effects at standard doses, and which are the best choices and what are the dosing recommendations for those choices. If we could get all the information to guide us, that would be a useful product, but right now, we don’t know enough to be able to make these determinations.”

Current evidence-based genetic testing supports a limited role for CYP2D6 and CYP2C19 genotyping because most psychiatric drugs are metabolized by those two enzymes. Poor metabolizers have two dysfunctional copies of the enzyme-encoding gene. This results in increased drug plasma levels with a potentially increased rate of adverse effects.

“Intermediate and extensive metabolizers usually have a normal phenotype, but you can also have ultrarapid metabolizers who have duplications or other enhancing mutations of the CYP gene,” Dr. Nurmi said. “This can result in lower bioavailability and possibly efficacy. Psychiatrists treat poor metabolizers and ultrarapid metabolizers all the time, because the variants are very common.” An estimated 10% of White people are poor metabolizers at the CYP2D6 gene while about 7% are ultrarapid metabolizers. At the same time, an estimated 20% of Asians, Africans, and Whites are poor metabolizers at the CYP2C19 gene. “So, you’re seeing a lot of this in your practice, and you’re probably changing dosing based on genetic differences in metabolism,” she said.

The only FDA pharmacodynamic treatment guideline is for the risk of Stevens-Johnson syndrome (SJS) with the use of carbamazepine. In a study of 44 patients with SJS, all were positive for the HLA-B*1502 variant, compared with 3% of carbamazepine-tolerant patients (Nature 2004;428[6982]:486). The frequency of carrying this variant is an estimated 1:10,000 among Whites and 1:1,000 among Asians. In 2007, the FDA recommended that patients of Asian ancestry should be screened for HLA-B*1502 prior to starting carbamazepine.

Genetic variation also predicts clinical outcome with atomoxetine use. “Most child psychiatrists I know think atomoxetine doesn’t work as a second-line nonstimulant medication for ADHD,” Dr. Nurmi said. “I’d like to convince you that why you think it doesn’t work is because of the genetics.” In a study published in 2019, Dr. Nurmi and colleagues reviewed medical literature and provided therapeutic recommendations for atomoxetine therapy based on CYP2D6 genotype (Clin Pharmacol Ther 2019 Jul;106[1]:94-102). They observed 10- to 30-fold plasma differences in drug exposure between normal metabolizers and poor metabolizers.

“Poor metabolizers therefore get more benefit, but they are also going to get more side effects,” she said. “FDA recommended doses are inadequate for normal metabolizers, so they had to make guidelines based on poor metabolizers because there would be too much risk for them at higher doses. One-third of individuals require doses above the FDA limit to achieve a therapeutic drug level.”

Dr. Nurmi warned that the existing evidence base for using these genetic tests in children “is really poor. There is no data in adults with any diagnosis other than depression, and even those studies are plagued by concerns. When you’re implementing decision support tools in your practice, the key factors are patient presentation, history and symptoms, your clinical skills, the evidence base, FDA recommendations, and patient autonomy. Appropriate incorporation of genetic data should include avoiding a medication with high toxicity (like SJS), titration planning (dose and titration speed adjustments), and choosing between medications in the same class with an indication or evidence base for the target disorder.” She added that while the benefit of current genetic testing is limited, it may help some patients feel more comfortable tolerating a medication. “For example, being able to tell someone with anxiety that their genetics suggests that they will not have side effects could be very powerful,” she said.

In a 2018 safety communication, the FDA warned the public about its concerns with companies making claims about how to use genetic test results to manage medication treatments that are not supported by recommendations in the FDA-approved drug labeling or other scientific evidence. The American Academy of Child and Adolescent Psychiatry also published a guide for patients and families.

Dr. Nurmi disclosed that she is an unpaid advisory board member for Myriad Genetics and the Tourette Association of America, a paid adviser for Teva Pharmaceuticals, and a recipient of research support from Emalex Pharmaceuticals. She has received research funding from the National Institutes Health, the International OCD Foundation, the Tourette Association of America, and the Brain & Behavior Research Foundation.

LAS VEGAS – Someday, pharmacogenomics will advance precision psychiatry, but in the opinion of Erika L. Nurmi, MD, PhD, routine use of genetic testing to guide clinical treatment decisions is not indicated.

“It’s misleading to rely on results of genetic tests to drive clinical treatment,” Dr. Nurmi, a child and adolescent psychiatrist in the department of psychiatry and biobehavioral sciences at the University of California, Los Angeles, said during an annual psychopharmacology update held by the Nevada Psychiatric Association. “There’s a lot of hope and promise there. But currently, we only know the tip of the iceberg about how drugs work and the genetics influencing these effects. Current testing is probably a very poor reflection of the complexity of drug effects.”

According to Dr. Nurmi, there are at least 165 Food and Drug Administration–approved drugs with pharmacogenetic information on 64 different biomarkers – 37% with CYP p450 notations. Of these, 32 psychiatric drugs have pharmacogenetic information, and most of them are dosing recommendations based on whether a patient has the variant. However, there is wide public acceptance of genetic testing in preventing the wrong drug from being used, in selecting the best drug dose, and avoiding side effects (Pharmacogenomics 2012;12[3]:197-204). “Most people have a lot of hope [for genetic testing in psychiatry],” Dr. Nurmi said. “But is the science really there? It doesn’t matter, because these companies are doing it, and you are being shown these reports from patients. Whether or not the science supports it, we’re going to have to interpret these reports and explain them to our patients – even if we don’t order them.”

Currently, she continued, clinicians practice trial and error prescribing where they might try one treatment in a class that they think that will work based on previous literature. If nothing works, they try another one. If that’s intolerable, they try a third treatment, and so on. “When we finally find the right treatment, it can take some time to get the dosing right,” Dr. Nurmi said. “So, it can take many months to get a child on the right medication. Precision treatment, on the other hand, would start off by taking a saliva or blood sample to get a printout that lets physicians know which drugs might be used with caution because they might lack efficacy at standard doses, which ones would likely have adverse effects at standard doses, and which are the best choices and what are the dosing recommendations for those choices. If we could get all the information to guide us, that would be a useful product, but right now, we don’t know enough to be able to make these determinations.”

Current evidence-based genetic testing supports a limited role for CYP2D6 and CYP2C19 genotyping because most psychiatric drugs are metabolized by those two enzymes. Poor metabolizers have two dysfunctional copies of the enzyme-encoding gene. This results in increased drug plasma levels with a potentially increased rate of adverse effects.

“Intermediate and extensive metabolizers usually have a normal phenotype, but you can also have ultrarapid metabolizers who have duplications or other enhancing mutations of the CYP gene,” Dr. Nurmi said. “This can result in lower bioavailability and possibly efficacy. Psychiatrists treat poor metabolizers and ultrarapid metabolizers all the time, because the variants are very common.” An estimated 10% of White people are poor metabolizers at the CYP2D6 gene while about 7% are ultrarapid metabolizers. At the same time, an estimated 20% of Asians, Africans, and Whites are poor metabolizers at the CYP2C19 gene. “So, you’re seeing a lot of this in your practice, and you’re probably changing dosing based on genetic differences in metabolism,” she said.

The only FDA pharmacodynamic treatment guideline is for the risk of Stevens-Johnson syndrome (SJS) with the use of carbamazepine. In a study of 44 patients with SJS, all were positive for the HLA-B*1502 variant, compared with 3% of carbamazepine-tolerant patients (Nature 2004;428[6982]:486). The frequency of carrying this variant is an estimated 1:10,000 among Whites and 1:1,000 among Asians. In 2007, the FDA recommended that patients of Asian ancestry should be screened for HLA-B*1502 prior to starting carbamazepine.

Genetic variation also predicts clinical outcome with atomoxetine use. “Most child psychiatrists I know think atomoxetine doesn’t work as a second-line nonstimulant medication for ADHD,” Dr. Nurmi said. “I’d like to convince you that why you think it doesn’t work is because of the genetics.” In a study published in 2019, Dr. Nurmi and colleagues reviewed medical literature and provided therapeutic recommendations for atomoxetine therapy based on CYP2D6 genotype (Clin Pharmacol Ther 2019 Jul;106[1]:94-102). They observed 10- to 30-fold plasma differences in drug exposure between normal metabolizers and poor metabolizers.

“Poor metabolizers therefore get more benefit, but they are also going to get more side effects,” she said. “FDA recommended doses are inadequate for normal metabolizers, so they had to make guidelines based on poor metabolizers because there would be too much risk for them at higher doses. One-third of individuals require doses above the FDA limit to achieve a therapeutic drug level.”

Dr. Nurmi warned that the existing evidence base for using these genetic tests in children “is really poor. There is no data in adults with any diagnosis other than depression, and even those studies are plagued by concerns. When you’re implementing decision support tools in your practice, the key factors are patient presentation, history and symptoms, your clinical skills, the evidence base, FDA recommendations, and patient autonomy. Appropriate incorporation of genetic data should include avoiding a medication with high toxicity (like SJS), titration planning (dose and titration speed adjustments), and choosing between medications in the same class with an indication or evidence base for the target disorder.” She added that while the benefit of current genetic testing is limited, it may help some patients feel more comfortable tolerating a medication. “For example, being able to tell someone with anxiety that their genetics suggests that they will not have side effects could be very powerful,” she said.

In a 2018 safety communication, the FDA warned the public about its concerns with companies making claims about how to use genetic test results to manage medication treatments that are not supported by recommendations in the FDA-approved drug labeling or other scientific evidence. The American Academy of Child and Adolescent Psychiatry also published a guide for patients and families.

Dr. Nurmi disclosed that she is an unpaid advisory board member for Myriad Genetics and the Tourette Association of America, a paid adviser for Teva Pharmaceuticals, and a recipient of research support from Emalex Pharmaceuticals. She has received research funding from the National Institutes Health, the International OCD Foundation, the Tourette Association of America, and the Brain & Behavior Research Foundation.

Early results from a new study show a significant correlation between tic severity and social media use during the COVID pandemic in adolescents with a preexisting tic disorder.

The findings should help answer questions surrounding a recent increase in tic disorders, lead author Jessica Frey, MD, a movement disorders fellow at the University of Florida, Gainesville, told this news organization.

University of Florida

“We’re trying to learn why there are new-onset explosive tic disorders [or] functional tic disorders, and to find ways to educate patients, parents, and the general public about what Tourette syndrome looks like – and how we can help patients have a better quality of life,” Dr. Frey said.

The findings will be presented at the American Academy of Neurology 2022 annual meeting in April.
 

‘Robust’ increase

A neurologic disorder that causes sudden repetitive involuntary muscle movements and sounds, Tourette syndrome typically develops in childhood, worsens in adolescence, and improves or completely disappears in adulthood, Dr. Frey noted.

The condition is often negatively portrayed in films, showing people using obscene gestures or vulgar language, she said. Although social media can be an “empowering tool” for tic sufferers, it is unregulated and can be a vehicle for “false information,” she added.

Dr. Frey noted that during the pandemic there has been a “robust” increase in use by teens of social media, particularly TikTok. At the same time, there have been reports of teen girls experiencing “explosive tic onset” that mimics videos from TikTok influencers.

The new analysis included 20 teens with a tic disorder, ranging in age from 11 to 21 years (average age, 16 years). About 45% of participants identified as male, 45% as female, and 10% as nonbinary.

The nature of the tic disorder varied widely among participants. Some had experienced tics for many years, while others only developed tics during the pandemic.

Participants completed a detailed survey, part of which inquired about where they received information about tics, such as from a doctor, media, parents, or teachers.

They were also asked to rank various social media platforms, including Tik Tok, Facebook, and YouTube on a five-point Likert scale as an information source about tics.

In addition, the survey inquired about tic severity and frequency, quality of life, and whether the pandemic or social media affected respondents’ tics.
 

Worsens quality of life

Results showed 65% of respondents used social media at least four to five times per day for an average of 5.6 hours per day. Approximately 90% reported increased use of social media during COVID.

Only 5% of participants reported using social media to provide information about tics.

About half of respondents indicated social media adversely affected their tics, and 85% said their tic frequency worsened during COVID.

Dr. Frey noted that because teens had to attend school virtually, that may have led to increased hours spent online.

There was no significant correlation between social media use and self-reported frequency of tics since the onset of COVID (Pearson correlation coefficient [R], –0.0055, P = .982).

However, there was a statistically significant correlation between social media use and tic severity (R, –0.496, P = .026) and quality of life (R, –0.447, P = .048).

These results suggest teenagers did not develop more tics, but rather the tics they already had worsened and affected their quality of life, Dr. Frey noted. She added that teens sometimes injure themselves while experiencing tics.

The full study has now enrolled 50 participants, and investigators anticipate that number to go up to 80. “We’re hoping to see more patterns emerge when we have a larger cohort of data available,” said Dr. Frey.

Asking parents to weigh in on the impact of social media on their child’s tic condition would be “a great idea for a follow-up study,” she added.
 

Symptoms exacerbated

Commenting on the findings, Tamara Pringsheim, MD, professor in the department of clinical neurosciences, psychiatry, pediatrics, and community health sciences at the University of Calgary (Alta.), said she also has noticed the impact of increased social media use on young patients with tics during the pandemic.

“Many young people report that seeing other people with tics, or ticlike behaviors, can exacerbate their own symptoms,” said Dr. Pringsheim, who is the university’s program lead on Tourette and pediatric movement disorders.

She noted a principle of the Comprehensive Behavioral Intervention for Tics, which is a nonpharmacologic technique demonstrated to reduce tic severity, is to identify antecedents or triggers for tics, and to learn to manage them. It might be a good idea to remind young patients of this principle, said Dr. Pringsheim, who was not associated with the current research.

“I suggest to young people who report specific social media content as a trigger for symptoms to recognize the effect of the exposure on their symptoms and make an informed choice about what they view and how much time they spend on social media,” she added.

The study did not receive any outside funding support. Dr. Frey has disclosed no relevant financial relationships.

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

Early results from a new study show a significant correlation between tic severity and social media use during the COVID pandemic in adolescents with a preexisting tic disorder.

The findings should help answer questions surrounding a recent increase in tic disorders, lead author Jessica Frey, MD, a movement disorders fellow at the University of Florida, Gainesville, told this news organization.

University of Florida

“We’re trying to learn why there are new-onset explosive tic disorders [or] functional tic disorders, and to find ways to educate patients, parents, and the general public about what Tourette syndrome looks like – and how we can help patients have a better quality of life,” Dr. Frey said.

The findings will be presented at the American Academy of Neurology 2022 annual meeting in April.
 

‘Robust’ increase

A neurologic disorder that causes sudden repetitive involuntary muscle movements and sounds, Tourette syndrome typically develops in childhood, worsens in adolescence, and improves or completely disappears in adulthood, Dr. Frey noted.

The condition is often negatively portrayed in films, showing people using obscene gestures or vulgar language, she said. Although social media can be an “empowering tool” for tic sufferers, it is unregulated and can be a vehicle for “false information,” she added.

Dr. Frey noted that during the pandemic there has been a “robust” increase in use by teens of social media, particularly TikTok. At the same time, there have been reports of teen girls experiencing “explosive tic onset” that mimics videos from TikTok influencers.

The new analysis included 20 teens with a tic disorder, ranging in age from 11 to 21 years (average age, 16 years). About 45% of participants identified as male, 45% as female, and 10% as nonbinary.

The nature of the tic disorder varied widely among participants. Some had experienced tics for many years, while others only developed tics during the pandemic.

Participants completed a detailed survey, part of which inquired about where they received information about tics, such as from a doctor, media, parents, or teachers.

They were also asked to rank various social media platforms, including Tik Tok, Facebook, and YouTube on a five-point Likert scale as an information source about tics.

In addition, the survey inquired about tic severity and frequency, quality of life, and whether the pandemic or social media affected respondents’ tics.
 

Worsens quality of life

Results showed 65% of respondents used social media at least four to five times per day for an average of 5.6 hours per day. Approximately 90% reported increased use of social media during COVID.

Only 5% of participants reported using social media to provide information about tics.

About half of respondents indicated social media adversely affected their tics, and 85% said their tic frequency worsened during COVID.

Dr. Frey noted that because teens had to attend school virtually, that may have led to increased hours spent online.

There was no significant correlation between social media use and self-reported frequency of tics since the onset of COVID (Pearson correlation coefficient [R], –0.0055, P = .982).

However, there was a statistically significant correlation between social media use and tic severity (R, –0.496, P = .026) and quality of life (R, –0.447, P = .048).

These results suggest teenagers did not develop more tics, but rather the tics they already had worsened and affected their quality of life, Dr. Frey noted. She added that teens sometimes injure themselves while experiencing tics.

The full study has now enrolled 50 participants, and investigators anticipate that number to go up to 80. “We’re hoping to see more patterns emerge when we have a larger cohort of data available,” said Dr. Frey.

Asking parents to weigh in on the impact of social media on their child’s tic condition would be “a great idea for a follow-up study,” she added.
 

Symptoms exacerbated

Commenting on the findings, Tamara Pringsheim, MD, professor in the department of clinical neurosciences, psychiatry, pediatrics, and community health sciences at the University of Calgary (Alta.), said she also has noticed the impact of increased social media use on young patients with tics during the pandemic.

“Many young people report that seeing other people with tics, or ticlike behaviors, can exacerbate their own symptoms,” said Dr. Pringsheim, who is the university’s program lead on Tourette and pediatric movement disorders.

She noted a principle of the Comprehensive Behavioral Intervention for Tics, which is a nonpharmacologic technique demonstrated to reduce tic severity, is to identify antecedents or triggers for tics, and to learn to manage them. It might be a good idea to remind young patients of this principle, said Dr. Pringsheim, who was not associated with the current research.

“I suggest to young people who report specific social media content as a trigger for symptoms to recognize the effect of the exposure on their symptoms and make an informed choice about what they view and how much time they spend on social media,” she added.

The study did not receive any outside funding support. Dr. Frey has disclosed no relevant financial relationships.

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

Early results from a new study show a significant correlation between tic severity and social media use during the COVID pandemic in adolescents with a preexisting tic disorder.

The findings should help answer questions surrounding a recent increase in tic disorders, lead author Jessica Frey, MD, a movement disorders fellow at the University of Florida, Gainesville, told this news organization.

University of Florida

“We’re trying to learn why there are new-onset explosive tic disorders [or] functional tic disorders, and to find ways to educate patients, parents, and the general public about what Tourette syndrome looks like – and how we can help patients have a better quality of life,” Dr. Frey said.

The findings will be presented at the American Academy of Neurology 2022 annual meeting in April.
 

‘Robust’ increase

A neurologic disorder that causes sudden repetitive involuntary muscle movements and sounds, Tourette syndrome typically develops in childhood, worsens in adolescence, and improves or completely disappears in adulthood, Dr. Frey noted.

The condition is often negatively portrayed in films, showing people using obscene gestures or vulgar language, she said. Although social media can be an “empowering tool” for tic sufferers, it is unregulated and can be a vehicle for “false information,” she added.

Dr. Frey noted that during the pandemic there has been a “robust” increase in use by teens of social media, particularly TikTok. At the same time, there have been reports of teen girls experiencing “explosive tic onset” that mimics videos from TikTok influencers.

The new analysis included 20 teens with a tic disorder, ranging in age from 11 to 21 years (average age, 16 years). About 45% of participants identified as male, 45% as female, and 10% as nonbinary.

The nature of the tic disorder varied widely among participants. Some had experienced tics for many years, while others only developed tics during the pandemic.

Participants completed a detailed survey, part of which inquired about where they received information about tics, such as from a doctor, media, parents, or teachers.

They were also asked to rank various social media platforms, including Tik Tok, Facebook, and YouTube on a five-point Likert scale as an information source about tics.

In addition, the survey inquired about tic severity and frequency, quality of life, and whether the pandemic or social media affected respondents’ tics.
 

Worsens quality of life

Results showed 65% of respondents used social media at least four to five times per day for an average of 5.6 hours per day. Approximately 90% reported increased use of social media during COVID.

Only 5% of participants reported using social media to provide information about tics.

About half of respondents indicated social media adversely affected their tics, and 85% said their tic frequency worsened during COVID.

Dr. Frey noted that because teens had to attend school virtually, that may have led to increased hours spent online.

There was no significant correlation between social media use and self-reported frequency of tics since the onset of COVID (Pearson correlation coefficient [R], –0.0055, P = .982).

However, there was a statistically significant correlation between social media use and tic severity (R, –0.496, P = .026) and quality of life (R, –0.447, P = .048).

These results suggest teenagers did not develop more tics, but rather the tics they already had worsened and affected their quality of life, Dr. Frey noted. She added that teens sometimes injure themselves while experiencing tics.

The full study has now enrolled 50 participants, and investigators anticipate that number to go up to 80. “We’re hoping to see more patterns emerge when we have a larger cohort of data available,” said Dr. Frey.

Asking parents to weigh in on the impact of social media on their child’s tic condition would be “a great idea for a follow-up study,” she added.
 

Symptoms exacerbated

Commenting on the findings, Tamara Pringsheim, MD, professor in the department of clinical neurosciences, psychiatry, pediatrics, and community health sciences at the University of Calgary (Alta.), said she also has noticed the impact of increased social media use on young patients with tics during the pandemic.

“Many young people report that seeing other people with tics, or ticlike behaviors, can exacerbate their own symptoms,” said Dr. Pringsheim, who is the university’s program lead on Tourette and pediatric movement disorders.

She noted a principle of the Comprehensive Behavioral Intervention for Tics, which is a nonpharmacologic technique demonstrated to reduce tic severity, is to identify antecedents or triggers for tics, and to learn to manage them. It might be a good idea to remind young patients of this principle, said Dr. Pringsheim, who was not associated with the current research.

“I suggest to young people who report specific social media content as a trigger for symptoms to recognize the effect of the exposure on their symptoms and make an informed choice about what they view and how much time they spend on social media,” she added.

The study did not receive any outside funding support. Dr. Frey has disclosed no relevant financial relationships.

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

LAS VEGAS – In the opinion of Christoph U. Correll, MD, tardive dyskinesia (TD) “has been somewhat forgotten” by psychiatrists because the risk of patients developing the condition is considered to be significantly lower with second-generation antipsychotics compared with first-generation antipsychotics.

“But this does not seem to always be the case, because there is still a risk of TD, and we need to monitor for it,” Dr. Correll, professor of psychiatry and molecular medicine at The Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New York, said during an annual psychopharmacology update held by the Nevada Psychiatric Association. “It is important to minimize the risk of TD by educating patients and caregivers about the risks of and alternatives to antipsychotic medication and early signs of TD.”

First described in 1957, TD is characterized by involuntary repetitive but irregular movements, mostly in the oral, lingual, and buccal regions – such as tongue protruding, puckering, chewing, and grimacing. Less often, there are movements in the hands, legs, feet, and torso. Symptoms can include mannerisms, stereotypies, tics, myoclonus, dystonias, tremor, and akathisia. “TD can be severe, persistent, and have medical and psychosocial consequences,” Dr. Correll said. “It can occur in untreated patients, but treatment with dopamine blocking agents – antipsychotics and metoclopramide – increases risk for TD.”

Differential diagnoses to consider include morbus Huntington, benign familial Chorea, and Sydenham’s Chorea. Less frequent causes of TD include metabolic conditions such as uremia, hyponatremia, hypernatremia, hypoparathyroidism, and hyperparathyroidism. “Those would need to be ruled out during the physical exam,” he said. There can also be inflammatory causes of TD such as herpes simplex virus, varicella, measles, mumps, and rubella.

A standard measure for TD diagnosis is the Abnormal Involuntary Movement Scale (AIMS), an observer-rated 12-item anchored scale that takes 5-10 minutes to administer. However, the AIMS on its own does not diagnose TD. In 1982, researchers developed three diagnostic criteria for TD: At least 3 months of cumulative antipsychotic drug exposure; presence of at least moderate abnormal involuntary movements in one or more body area(s) or mild movements in two or more body areas, and absence of other conditions that might produce involuntary movements (Arch Gen Psychiatry 1982;39:486-7).

The impact of TD on everyday functioning depends on anatomic location as well as severity, Dr. Correll continued. The condition can cause impairments to speech, verbal communication, dentition, temporomandibular joint pain/myalgia, swallowing difficulties, and fine motor skills including instrumental activities of daily living and written communication. Truncal and lower extremity TD can affect gait, posture and postural stability, strength, power flexibility, physical capacity, and one’s ability to exercise. “There are also psychological impairments,” he said. “Patients can develop different awareness so they become self-conscious; there can be cognitive abnormalities, and they can become more anxious or [have an] increased sense of paranoia, isolation, stigma, social and/or educational/vocational impairment.”

According to research by Dr. Correll and colleagues, unmodifiable patient-related risk factors for TD include older age, female sex, and being of white or African descent (J Neurol Sci 2018 June 15; 389:21-7). Unmodifiable illness-related risk factors include longer duration of illness, intellectual disability and brain damage, negative symptoms in schizophrenia, mood disorders, cognitive symptoms in mood disorders, and gene polymorphisms involving antipsychotic metabolism and dopamine functioning. Modifiable comorbidity-related factors include diabetes, smoking, and alcohol/substance abuse, while modifiable treatment-related factors include dopamine receptor blockers, higher cumulative and current antipsychotic dose or plasma levels, early parkinsonian side effects, treatment-emergent akathisia, and anticholinergic co-treatment. In a meta-analysis of 41 studies that aimed to determine the prevalence of TD, the mean age of the 11,493 patients was 43, 66% were male, and 77% had schizophrenia spectrum disorders (J Clin Psychiatry. 2017 Mar;78[3]:e264-78). The global mean TD prevalence was 25%, but the rates were lower with patients on current treatment with second-generation antipsychotics compared with those on first-generation antipsychotics (21% vs. 30%, respectively).

According to Dr. Correll, strategies for preventing TD include confirming and documenting the indication for dopamine antagonist antipsychotic medications, using conservative maintenance doses, and considering the use of SGAs, especially in those at high risk for EPS (extrapyramidal symptoms). “Don’t go too high [with the dose],” he said. “Stay below the EPS threshold. Inform patients and caregivers of the risk of TD and assess for incipient signs regularly using the AIMS.”

Treatment options include discontinuing antipsychotics, adjusting their dose, or switching patients from a first-generation antipsychotic to a second-generation antipsychotic. Supplementation with antioxidants/radical scavengers such as vitamin E, vitamin B₆, ginkgo biloba, and fish oil “can be tried, but have limited evidence, as is the case for melatonin.” Other options include clonazepam, amantadine, donepezil, and tetrabenazine, a reversible and specific inhibitor of vesicular monoamine transporter-2 (VMAT-2), a transporter that packages neurotransmitters (preferentially dopamine) into vesicles for release into the synapse and was approved in 2008 as an orphan drug for the treatment of choreiform movements associated with Huntington’s disease. “Neurologists have using tetrabenazine off-label for TD, but in schizophrenia and other psychiatric care, we rarely use it because it has to be given three times a day and it has a black box warning for depression and suicidality,” he said.

Dr. Correll noted that the Food and Drug Administration approval of two more recent VMAT-2 inhibitors – deutetrabenazine (Austedo) and valbenazine (Ingrezza) – provides an evidence-based care option for the effective management of TD. Deutetrabenazine requires titration over several weeks and twice-daily dosing, while valbenazine can reach the maximum dose by the beginning of week 2 and is dosed once daily. Deutetrabenazine should be taken with food, which is not required valbenazine.

“Both VMAT-2 inhibitors are generally well tolerated and have a positive benefit-risk ratio,” he said. “Both are recommended by the APA guidelines as the preferred and only evidence-based treatment for TD.”

Dr. Correll reported that he has received honoraria from and has been an advisory board member for numerous pharmaceutical companies. He has also received grant support from Janssen, the National Institute of Mental Health, the Patient Centered Outcomes Research Institute, Takeda, and the Thrasher Foundation.

LAS VEGAS – In the opinion of Christoph U. Correll, MD, tardive dyskinesia (TD) “has been somewhat forgotten” by psychiatrists because the risk of patients developing the condition is considered to be significantly lower with second-generation antipsychotics compared with first-generation antipsychotics.

“But this does not seem to always be the case, because there is still a risk of TD, and we need to monitor for it,” Dr. Correll, professor of psychiatry and molecular medicine at The Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New York, said during an annual psychopharmacology update held by the Nevada Psychiatric Association. “It is important to minimize the risk of TD by educating patients and caregivers about the risks of and alternatives to antipsychotic medication and early signs of TD.”

First described in 1957, TD is characterized by involuntary repetitive but irregular movements, mostly in the oral, lingual, and buccal regions – such as tongue protruding, puckering, chewing, and grimacing. Less often, there are movements in the hands, legs, feet, and torso. Symptoms can include mannerisms, stereotypies, tics, myoclonus, dystonias, tremor, and akathisia. “TD can be severe, persistent, and have medical and psychosocial consequences,” Dr. Correll said. “It can occur in untreated patients, but treatment with dopamine blocking agents – antipsychotics and metoclopramide – increases risk for TD.”

Differential diagnoses to consider include morbus Huntington, benign familial Chorea, and Sydenham’s Chorea. Less frequent causes of TD include metabolic conditions such as uremia, hyponatremia, hypernatremia, hypoparathyroidism, and hyperparathyroidism. “Those would need to be ruled out during the physical exam,” he said. There can also be inflammatory causes of TD such as herpes simplex virus, varicella, measles, mumps, and rubella.

A standard measure for TD diagnosis is the Abnormal Involuntary Movement Scale (AIMS), an observer-rated 12-item anchored scale that takes 5-10 minutes to administer. However, the AIMS on its own does not diagnose TD. In 1982, researchers developed three diagnostic criteria for TD: At least 3 months of cumulative antipsychotic drug exposure; presence of at least moderate abnormal involuntary movements in one or more body area(s) or mild movements in two or more body areas, and absence of other conditions that might produce involuntary movements (Arch Gen Psychiatry 1982;39:486-7).

The impact of TD on everyday functioning depends on anatomic location as well as severity, Dr. Correll continued. The condition can cause impairments to speech, verbal communication, dentition, temporomandibular joint pain/myalgia, swallowing difficulties, and fine motor skills including instrumental activities of daily living and written communication. Truncal and lower extremity TD can affect gait, posture and postural stability, strength, power flexibility, physical capacity, and one’s ability to exercise. “There are also psychological impairments,” he said. “Patients can develop different awareness so they become self-conscious; there can be cognitive abnormalities, and they can become more anxious or [have an] increased sense of paranoia, isolation, stigma, social and/or educational/vocational impairment.”

According to research by Dr. Correll and colleagues, unmodifiable patient-related risk factors for TD include older age, female sex, and being of white or African descent (J Neurol Sci 2018 June 15; 389:21-7). Unmodifiable illness-related risk factors include longer duration of illness, intellectual disability and brain damage, negative symptoms in schizophrenia, mood disorders, cognitive symptoms in mood disorders, and gene polymorphisms involving antipsychotic metabolism and dopamine functioning. Modifiable comorbidity-related factors include diabetes, smoking, and alcohol/substance abuse, while modifiable treatment-related factors include dopamine receptor blockers, higher cumulative and current antipsychotic dose or plasma levels, early parkinsonian side effects, treatment-emergent akathisia, and anticholinergic co-treatment. In a meta-analysis of 41 studies that aimed to determine the prevalence of TD, the mean age of the 11,493 patients was 43, 66% were male, and 77% had schizophrenia spectrum disorders (J Clin Psychiatry. 2017 Mar;78[3]:e264-78). The global mean TD prevalence was 25%, but the rates were lower with patients on current treatment with second-generation antipsychotics compared with those on first-generation antipsychotics (21% vs. 30%, respectively).

According to Dr. Correll, strategies for preventing TD include confirming and documenting the indication for dopamine antagonist antipsychotic medications, using conservative maintenance doses, and considering the use of SGAs, especially in those at high risk for EPS (extrapyramidal symptoms). “Don’t go too high [with the dose],” he said. “Stay below the EPS threshold. Inform patients and caregivers of the risk of TD and assess for incipient signs regularly using the AIMS.”

Treatment options include discontinuing antipsychotics, adjusting their dose, or switching patients from a first-generation antipsychotic to a second-generation antipsychotic. Supplementation with antioxidants/radical scavengers such as vitamin E, vitamin B₆, ginkgo biloba, and fish oil “can be tried, but have limited evidence, as is the case for melatonin.” Other options include clonazepam, amantadine, donepezil, and tetrabenazine, a reversible and specific inhibitor of vesicular monoamine transporter-2 (VMAT-2), a transporter that packages neurotransmitters (preferentially dopamine) into vesicles for release into the synapse and was approved in 2008 as an orphan drug for the treatment of choreiform movements associated with Huntington’s disease. “Neurologists have using tetrabenazine off-label for TD, but in schizophrenia and other psychiatric care, we rarely use it because it has to be given three times a day and it has a black box warning for depression and suicidality,” he said.

Dr. Correll noted that the Food and Drug Administration approval of two more recent VMAT-2 inhibitors – deutetrabenazine (Austedo) and valbenazine (Ingrezza) – provides an evidence-based care option for the effective management of TD. Deutetrabenazine requires titration over several weeks and twice-daily dosing, while valbenazine can reach the maximum dose by the beginning of week 2 and is dosed once daily. Deutetrabenazine should be taken with food, which is not required valbenazine.

“Both VMAT-2 inhibitors are generally well tolerated and have a positive benefit-risk ratio,” he said. “Both are recommended by the APA guidelines as the preferred and only evidence-based treatment for TD.”

Dr. Correll reported that he has received honoraria from and has been an advisory board member for numerous pharmaceutical companies. He has also received grant support from Janssen, the National Institute of Mental Health, the Patient Centered Outcomes Research Institute, Takeda, and the Thrasher Foundation.

LAS VEGAS – In the opinion of Christoph U. Correll, MD, tardive dyskinesia (TD) “has been somewhat forgotten” by psychiatrists because the risk of patients developing the condition is considered to be significantly lower with second-generation antipsychotics compared with first-generation antipsychotics.

“But this does not seem to always be the case, because there is still a risk of TD, and we need to monitor for it,” Dr. Correll, professor of psychiatry and molecular medicine at The Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New York, said during an annual psychopharmacology update held by the Nevada Psychiatric Association. “It is important to minimize the risk of TD by educating patients and caregivers about the risks of and alternatives to antipsychotic medication and early signs of TD.”

First described in 1957, TD is characterized by involuntary repetitive but irregular movements, mostly in the oral, lingual, and buccal regions – such as tongue protruding, puckering, chewing, and grimacing. Less often, there are movements in the hands, legs, feet, and torso. Symptoms can include mannerisms, stereotypies, tics, myoclonus, dystonias, tremor, and akathisia. “TD can be severe, persistent, and have medical and psychosocial consequences,” Dr. Correll said. “It can occur in untreated patients, but treatment with dopamine blocking agents – antipsychotics and metoclopramide – increases risk for TD.”

Differential diagnoses to consider include morbus Huntington, benign familial Chorea, and Sydenham’s Chorea. Less frequent causes of TD include metabolic conditions such as uremia, hyponatremia, hypernatremia, hypoparathyroidism, and hyperparathyroidism. “Those would need to be ruled out during the physical exam,” he said. There can also be inflammatory causes of TD such as herpes simplex virus, varicella, measles, mumps, and rubella.

A standard measure for TD diagnosis is the Abnormal Involuntary Movement Scale (AIMS), an observer-rated 12-item anchored scale that takes 5-10 minutes to administer. However, the AIMS on its own does not diagnose TD. In 1982, researchers developed three diagnostic criteria for TD: At least 3 months of cumulative antipsychotic drug exposure; presence of at least moderate abnormal involuntary movements in one or more body area(s) or mild movements in two or more body areas, and absence of other conditions that might produce involuntary movements (Arch Gen Psychiatry 1982;39:486-7).

The impact of TD on everyday functioning depends on anatomic location as well as severity, Dr. Correll continued. The condition can cause impairments to speech, verbal communication, dentition, temporomandibular joint pain/myalgia, swallowing difficulties, and fine motor skills including instrumental activities of daily living and written communication. Truncal and lower extremity TD can affect gait, posture and postural stability, strength, power flexibility, physical capacity, and one’s ability to exercise. “There are also psychological impairments,” he said. “Patients can develop different awareness so they become self-conscious; there can be cognitive abnormalities, and they can become more anxious or [have an] increased sense of paranoia, isolation, stigma, social and/or educational/vocational impairment.”

According to research by Dr. Correll and colleagues, unmodifiable patient-related risk factors for TD include older age, female sex, and being of white or African descent (J Neurol Sci 2018 June 15; 389:21-7). Unmodifiable illness-related risk factors include longer duration of illness, intellectual disability and brain damage, negative symptoms in schizophrenia, mood disorders, cognitive symptoms in mood disorders, and gene polymorphisms involving antipsychotic metabolism and dopamine functioning. Modifiable comorbidity-related factors include diabetes, smoking, and alcohol/substance abuse, while modifiable treatment-related factors include dopamine receptor blockers, higher cumulative and current antipsychotic dose or plasma levels, early parkinsonian side effects, treatment-emergent akathisia, and anticholinergic co-treatment. In a meta-analysis of 41 studies that aimed to determine the prevalence of TD, the mean age of the 11,493 patients was 43, 66% were male, and 77% had schizophrenia spectrum disorders (J Clin Psychiatry. 2017 Mar;78[3]:e264-78). The global mean TD prevalence was 25%, but the rates were lower with patients on current treatment with second-generation antipsychotics compared with those on first-generation antipsychotics (21% vs. 30%, respectively).

According to Dr. Correll, strategies for preventing TD include confirming and documenting the indication for dopamine antagonist antipsychotic medications, using conservative maintenance doses, and considering the use of SGAs, especially in those at high risk for EPS (extrapyramidal symptoms). “Don’t go too high [with the dose],” he said. “Stay below the EPS threshold. Inform patients and caregivers of the risk of TD and assess for incipient signs regularly using the AIMS.”

Treatment options include discontinuing antipsychotics, adjusting their dose, or switching patients from a first-generation antipsychotic to a second-generation antipsychotic. Supplementation with antioxidants/radical scavengers such as vitamin E, vitamin B₆, ginkgo biloba, and fish oil “can be tried, but have limited evidence, as is the case for melatonin.” Other options include clonazepam, amantadine, donepezil, and tetrabenazine, a reversible and specific inhibitor of vesicular monoamine transporter-2 (VMAT-2), a transporter that packages neurotransmitters (preferentially dopamine) into vesicles for release into the synapse and was approved in 2008 as an orphan drug for the treatment of choreiform movements associated with Huntington’s disease. “Neurologists have using tetrabenazine off-label for TD, but in schizophrenia and other psychiatric care, we rarely use it because it has to be given three times a day and it has a black box warning for depression and suicidality,” he said.

Dr. Correll noted that the Food and Drug Administration approval of two more recent VMAT-2 inhibitors – deutetrabenazine (Austedo) and valbenazine (Ingrezza) – provides an evidence-based care option for the effective management of TD. Deutetrabenazine requires titration over several weeks and twice-daily dosing, while valbenazine can reach the maximum dose by the beginning of week 2 and is dosed once daily. Deutetrabenazine should be taken with food, which is not required valbenazine.

“Both VMAT-2 inhibitors are generally well tolerated and have a positive benefit-risk ratio,” he said. “Both are recommended by the APA guidelines as the preferred and only evidence-based treatment for TD.”

Dr. Correll reported that he has received honoraria from and has been an advisory board member for numerous pharmaceutical companies. He has also received grant support from Janssen, the National Institute of Mental Health, the Patient Centered Outcomes Research Institute, Takeda, and the Thrasher Foundation.