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Brain implant is a potential life-changer for paralyzed patients
, results of a small, first-in-human study show.
A potential life changer for patients with amyotrophic lateral sclerosis (ALS), the minimally invasive device enables patients to carry out important activities of daily living.
“Our participants are able to use the device to perform tasks like sending email, texting loved ones and caregivers, browsing the web, and doing personal finances such as online banking,” study investigator Douglas J. Weber, PhD, professor of mechanical engineering and neuroscience, Carnegie Mellon University, Pittsburgh, told a press briefing.
The technology allowed one patient to write a book (due out later this year) and another patient to maintain communication despite losing his ability to speak, said the study’s lead investigator, Bruce Campbell, MBBS, PhD, professor of neurology, Royal Melbourne Hospital, University of Melbourne.
“In addition to providing patients with communicative capabilities not possible as a result of their disease, it is our goal to enable patients to be more independently involved in their care going forward, by enabling effective and faster communication directly with their caregiver and physician,” said Dr. Campbell.
The findings were presented at the 2022 annual meeting of the American Academy of Neurology.
Minimally invasive
ALS, also known as Lou Gehrig’s disease, is a progressive neurodegenerative disease that affects nerve cells in the brain and spinal cord. Patients with ALS eventually lose the ability to control muscle movement, often leading to total paralysis.
“Extending the period in which patients are able to communicate with loved ones and caregivers could provide a very meaningful benefit to patients with ALS,” said Dr. Weber.
Brain-computer interfaces measure and translate brain signals, with some functioning as motor neuro-prostheses. These devices provide direct communication between the brain and an external device by recording and decoding signals from the precentral gyrus as the result of movement intention.
“The technology has potential to empower the more than five million people in the U.S. who are severely paralyzed to once again perform important activities of daily living independently,” said Dr. Weber.
Until now, motor neuro-prostheses required surgery to remove a portion of the skull and place electrodes on to the brain. However, the new minimally invasive motor neuro-prostheses reach the brain by vascular access, dispensing with the need for a craniotomy.
“The brain-computer interface device used in our study is unique in that it does not require invasive open surgery to implant,” said Dr. Weber. “Instead this is an endovascular brain-computer interface.”
Using a catheter, surgeons feed the BCI through one of two jugular veins in the neck. They position an array of 16 sensors or electrodes on a stent-like scaffold that deploys against the walls of the superior sagittal sinus.
No adverse events
Describing the device, Dr. Weber said the electrodes or sensing elements are tiny and the body of the stent, which serves as a scaffold to support the electrodes, resembles a standard endovascular stent.
“It’s very small at the time of delivery because it’s held within the body of a catheter, but then when deployed it expands to contact the wall of the vein.”
The device transmits brain signals from the motor cortex to an electronics unit, located in a subcutaneous pocket that decodes movement signals. The machine-learning decoder is programmed as follows: When a trainer asked participants to attempt certain movements, like tapping their foot or extending their knee, the decoder analyzes nerve cell signals from those movement attempts. The decoder is able to translate movement signals into computer navigation.
The study included four patients with ALS who were paralyzed because of the disease and were trained to use the device.
A key safety endpoint was device-related serious adverse events resulting in death or increased disability during the post-implant evaluation period. Results showed all four participants successfully completed the 12-month follow-up with no serious adverse events.
Researchers also assessed target vessel patency and incidence of device migration at 3 and 12 months. Postoperative imaging showed that in all participants, the blood vessel that held the implanted device remained open and stayed in place.
Addressing the potential for blood clots, Dr. Weber said that so far there has been no sign of clotting or vascular occlusion.
“The device itself integrates well into the walls of the blood vessel over time,” he said. “Within the acute period after implantation, there’s time where the device is exposed to the blood stream, but once it becomes encapsulated and fully integrated into the blood vessel wall, the risks of thrombosis diminish.”
Greater independence
Researchers also recorded signal fidelity and stability over 12 months and use of the brain-computer interface to perform routine tasks. All participants learned to use the motor neuro-prostheses with eye tracking for computer use. Eye tracking technology helps a computer determine what a person is looking at.
Using the system, patients were able to complete tasks without help. These included text messaging and managing finances. “Since the device is fully implanted and easy for patients to use, they can use the technology independently and in their own home,” said Dr. Weber.
Although the study started with patients with ALS, those paralyzed from other causes, such as an upper spinal cord injury or brain-stem stroke could also benefit from this technology, Dr. Weber said. In addition, the technology could be expanded to broaden brain communication capabilities potentially to include robotic limbs, he said.
There’s even the potential to use this minimally invasive brain interface technology to deliver therapies like deep brain stimulation, which Dr. Weber noted is a growing field. “It’s [the] early days, but it’s a very exciting new direction for brain interface technology,” he said.
Researchers are now recruiting patients for the first U.S.-based feasibility trial of the device that will be funded by the NIH, said Dr. Weber. A limitation of the research was the study’s small size.
Advancing the field
Reached for a comment, Kevin C. Davis, an MD and PhD student in the department of biomedical engineering, University of Miami Miller School of Medicine, said this new work moves the field forward in an important way.
Dr. Davis and colleagues have shown the effectiveness of another technology used to overcome paralysis – a small portable system that facilitates hand grasp of a patient with a spinal cord injury. He reported on this DBS-based BCI system at the American Association of Neurological Surgeons (AANS) 2021 Annual Meeting.
Developing effective brain-computer interfaces, and motor neural prosthetics that avoid surgery, as the team did in this new study, is “worth exploring,” said Dr. Davis.
However, although the device used in this new study avoids cranial surgery, “sole vascular access may limit the device’s ability to reach other areas of the brain more suitable for upper-limb motor prosthetics,” he said.
“Determining how much function such a device could provide to individuals with locked-in syndrome or paralysis will be important in determining its viability as an eventual clinical tool for patients.”
The study was supported by Synchron, the maker of the device, the U.S. Defense Advanced Research Projects Agency, the Office of Naval Research, the National Health and Medical Research Council of Australia, the Australian Federal Government Foundation, and the Motor Neuron Disease Research Institute of Australia.
A version of this article first appeared on Medscape.com.
, results of a small, first-in-human study show.
A potential life changer for patients with amyotrophic lateral sclerosis (ALS), the minimally invasive device enables patients to carry out important activities of daily living.
“Our participants are able to use the device to perform tasks like sending email, texting loved ones and caregivers, browsing the web, and doing personal finances such as online banking,” study investigator Douglas J. Weber, PhD, professor of mechanical engineering and neuroscience, Carnegie Mellon University, Pittsburgh, told a press briefing.
The technology allowed one patient to write a book (due out later this year) and another patient to maintain communication despite losing his ability to speak, said the study’s lead investigator, Bruce Campbell, MBBS, PhD, professor of neurology, Royal Melbourne Hospital, University of Melbourne.
“In addition to providing patients with communicative capabilities not possible as a result of their disease, it is our goal to enable patients to be more independently involved in their care going forward, by enabling effective and faster communication directly with their caregiver and physician,” said Dr. Campbell.
The findings were presented at the 2022 annual meeting of the American Academy of Neurology.
Minimally invasive
ALS, also known as Lou Gehrig’s disease, is a progressive neurodegenerative disease that affects nerve cells in the brain and spinal cord. Patients with ALS eventually lose the ability to control muscle movement, often leading to total paralysis.
“Extending the period in which patients are able to communicate with loved ones and caregivers could provide a very meaningful benefit to patients with ALS,” said Dr. Weber.
Brain-computer interfaces measure and translate brain signals, with some functioning as motor neuro-prostheses. These devices provide direct communication between the brain and an external device by recording and decoding signals from the precentral gyrus as the result of movement intention.
“The technology has potential to empower the more than five million people in the U.S. who are severely paralyzed to once again perform important activities of daily living independently,” said Dr. Weber.
Until now, motor neuro-prostheses required surgery to remove a portion of the skull and place electrodes on to the brain. However, the new minimally invasive motor neuro-prostheses reach the brain by vascular access, dispensing with the need for a craniotomy.
“The brain-computer interface device used in our study is unique in that it does not require invasive open surgery to implant,” said Dr. Weber. “Instead this is an endovascular brain-computer interface.”
Using a catheter, surgeons feed the BCI through one of two jugular veins in the neck. They position an array of 16 sensors or electrodes on a stent-like scaffold that deploys against the walls of the superior sagittal sinus.
No adverse events
Describing the device, Dr. Weber said the electrodes or sensing elements are tiny and the body of the stent, which serves as a scaffold to support the electrodes, resembles a standard endovascular stent.
“It’s very small at the time of delivery because it’s held within the body of a catheter, but then when deployed it expands to contact the wall of the vein.”
The device transmits brain signals from the motor cortex to an electronics unit, located in a subcutaneous pocket that decodes movement signals. The machine-learning decoder is programmed as follows: When a trainer asked participants to attempt certain movements, like tapping their foot or extending their knee, the decoder analyzes nerve cell signals from those movement attempts. The decoder is able to translate movement signals into computer navigation.
The study included four patients with ALS who were paralyzed because of the disease and were trained to use the device.
A key safety endpoint was device-related serious adverse events resulting in death or increased disability during the post-implant evaluation period. Results showed all four participants successfully completed the 12-month follow-up with no serious adverse events.
Researchers also assessed target vessel patency and incidence of device migration at 3 and 12 months. Postoperative imaging showed that in all participants, the blood vessel that held the implanted device remained open and stayed in place.
Addressing the potential for blood clots, Dr. Weber said that so far there has been no sign of clotting or vascular occlusion.
“The device itself integrates well into the walls of the blood vessel over time,” he said. “Within the acute period after implantation, there’s time where the device is exposed to the blood stream, but once it becomes encapsulated and fully integrated into the blood vessel wall, the risks of thrombosis diminish.”
Greater independence
Researchers also recorded signal fidelity and stability over 12 months and use of the brain-computer interface to perform routine tasks. All participants learned to use the motor neuro-prostheses with eye tracking for computer use. Eye tracking technology helps a computer determine what a person is looking at.
Using the system, patients were able to complete tasks without help. These included text messaging and managing finances. “Since the device is fully implanted and easy for patients to use, they can use the technology independently and in their own home,” said Dr. Weber.
Although the study started with patients with ALS, those paralyzed from other causes, such as an upper spinal cord injury or brain-stem stroke could also benefit from this technology, Dr. Weber said. In addition, the technology could be expanded to broaden brain communication capabilities potentially to include robotic limbs, he said.
There’s even the potential to use this minimally invasive brain interface technology to deliver therapies like deep brain stimulation, which Dr. Weber noted is a growing field. “It’s [the] early days, but it’s a very exciting new direction for brain interface technology,” he said.
Researchers are now recruiting patients for the first U.S.-based feasibility trial of the device that will be funded by the NIH, said Dr. Weber. A limitation of the research was the study’s small size.
Advancing the field
Reached for a comment, Kevin C. Davis, an MD and PhD student in the department of biomedical engineering, University of Miami Miller School of Medicine, said this new work moves the field forward in an important way.
Dr. Davis and colleagues have shown the effectiveness of another technology used to overcome paralysis – a small portable system that facilitates hand grasp of a patient with a spinal cord injury. He reported on this DBS-based BCI system at the American Association of Neurological Surgeons (AANS) 2021 Annual Meeting.
Developing effective brain-computer interfaces, and motor neural prosthetics that avoid surgery, as the team did in this new study, is “worth exploring,” said Dr. Davis.
However, although the device used in this new study avoids cranial surgery, “sole vascular access may limit the device’s ability to reach other areas of the brain more suitable for upper-limb motor prosthetics,” he said.
“Determining how much function such a device could provide to individuals with locked-in syndrome or paralysis will be important in determining its viability as an eventual clinical tool for patients.”
The study was supported by Synchron, the maker of the device, the U.S. Defense Advanced Research Projects Agency, the Office of Naval Research, the National Health and Medical Research Council of Australia, the Australian Federal Government Foundation, and the Motor Neuron Disease Research Institute of Australia.
A version of this article first appeared on Medscape.com.
, results of a small, first-in-human study show.
A potential life changer for patients with amyotrophic lateral sclerosis (ALS), the minimally invasive device enables patients to carry out important activities of daily living.
“Our participants are able to use the device to perform tasks like sending email, texting loved ones and caregivers, browsing the web, and doing personal finances such as online banking,” study investigator Douglas J. Weber, PhD, professor of mechanical engineering and neuroscience, Carnegie Mellon University, Pittsburgh, told a press briefing.
The technology allowed one patient to write a book (due out later this year) and another patient to maintain communication despite losing his ability to speak, said the study’s lead investigator, Bruce Campbell, MBBS, PhD, professor of neurology, Royal Melbourne Hospital, University of Melbourne.
“In addition to providing patients with communicative capabilities not possible as a result of their disease, it is our goal to enable patients to be more independently involved in their care going forward, by enabling effective and faster communication directly with their caregiver and physician,” said Dr. Campbell.
The findings were presented at the 2022 annual meeting of the American Academy of Neurology.
Minimally invasive
ALS, also known as Lou Gehrig’s disease, is a progressive neurodegenerative disease that affects nerve cells in the brain and spinal cord. Patients with ALS eventually lose the ability to control muscle movement, often leading to total paralysis.
“Extending the period in which patients are able to communicate with loved ones and caregivers could provide a very meaningful benefit to patients with ALS,” said Dr. Weber.
Brain-computer interfaces measure and translate brain signals, with some functioning as motor neuro-prostheses. These devices provide direct communication between the brain and an external device by recording and decoding signals from the precentral gyrus as the result of movement intention.
“The technology has potential to empower the more than five million people in the U.S. who are severely paralyzed to once again perform important activities of daily living independently,” said Dr. Weber.
Until now, motor neuro-prostheses required surgery to remove a portion of the skull and place electrodes on to the brain. However, the new minimally invasive motor neuro-prostheses reach the brain by vascular access, dispensing with the need for a craniotomy.
“The brain-computer interface device used in our study is unique in that it does not require invasive open surgery to implant,” said Dr. Weber. “Instead this is an endovascular brain-computer interface.”
Using a catheter, surgeons feed the BCI through one of two jugular veins in the neck. They position an array of 16 sensors or electrodes on a stent-like scaffold that deploys against the walls of the superior sagittal sinus.
No adverse events
Describing the device, Dr. Weber said the electrodes or sensing elements are tiny and the body of the stent, which serves as a scaffold to support the electrodes, resembles a standard endovascular stent.
“It’s very small at the time of delivery because it’s held within the body of a catheter, but then when deployed it expands to contact the wall of the vein.”
The device transmits brain signals from the motor cortex to an electronics unit, located in a subcutaneous pocket that decodes movement signals. The machine-learning decoder is programmed as follows: When a trainer asked participants to attempt certain movements, like tapping their foot or extending their knee, the decoder analyzes nerve cell signals from those movement attempts. The decoder is able to translate movement signals into computer navigation.
The study included four patients with ALS who were paralyzed because of the disease and were trained to use the device.
A key safety endpoint was device-related serious adverse events resulting in death or increased disability during the post-implant evaluation period. Results showed all four participants successfully completed the 12-month follow-up with no serious adverse events.
Researchers also assessed target vessel patency and incidence of device migration at 3 and 12 months. Postoperative imaging showed that in all participants, the blood vessel that held the implanted device remained open and stayed in place.
Addressing the potential for blood clots, Dr. Weber said that so far there has been no sign of clotting or vascular occlusion.
“The device itself integrates well into the walls of the blood vessel over time,” he said. “Within the acute period after implantation, there’s time where the device is exposed to the blood stream, but once it becomes encapsulated and fully integrated into the blood vessel wall, the risks of thrombosis diminish.”
Greater independence
Researchers also recorded signal fidelity and stability over 12 months and use of the brain-computer interface to perform routine tasks. All participants learned to use the motor neuro-prostheses with eye tracking for computer use. Eye tracking technology helps a computer determine what a person is looking at.
Using the system, patients were able to complete tasks without help. These included text messaging and managing finances. “Since the device is fully implanted and easy for patients to use, they can use the technology independently and in their own home,” said Dr. Weber.
Although the study started with patients with ALS, those paralyzed from other causes, such as an upper spinal cord injury or brain-stem stroke could also benefit from this technology, Dr. Weber said. In addition, the technology could be expanded to broaden brain communication capabilities potentially to include robotic limbs, he said.
There’s even the potential to use this minimally invasive brain interface technology to deliver therapies like deep brain stimulation, which Dr. Weber noted is a growing field. “It’s [the] early days, but it’s a very exciting new direction for brain interface technology,” he said.
Researchers are now recruiting patients for the first U.S.-based feasibility trial of the device that will be funded by the NIH, said Dr. Weber. A limitation of the research was the study’s small size.
Advancing the field
Reached for a comment, Kevin C. Davis, an MD and PhD student in the department of biomedical engineering, University of Miami Miller School of Medicine, said this new work moves the field forward in an important way.
Dr. Davis and colleagues have shown the effectiveness of another technology used to overcome paralysis – a small portable system that facilitates hand grasp of a patient with a spinal cord injury. He reported on this DBS-based BCI system at the American Association of Neurological Surgeons (AANS) 2021 Annual Meeting.
Developing effective brain-computer interfaces, and motor neural prosthetics that avoid surgery, as the team did in this new study, is “worth exploring,” said Dr. Davis.
However, although the device used in this new study avoids cranial surgery, “sole vascular access may limit the device’s ability to reach other areas of the brain more suitable for upper-limb motor prosthetics,” he said.
“Determining how much function such a device could provide to individuals with locked-in syndrome or paralysis will be important in determining its viability as an eventual clinical tool for patients.”
The study was supported by Synchron, the maker of the device, the U.S. Defense Advanced Research Projects Agency, the Office of Naval Research, the National Health and Medical Research Council of Australia, the Australian Federal Government Foundation, and the Motor Neuron Disease Research Institute of Australia.
A version of this article first appeared on Medscape.com.
FROM AAN 2022
Novel drug significantly reduces tics in Tourette syndrome – without side effects
, 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.
, 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.
, 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.
FROM AAN 2022
Early puberty cases among girls surged during pandemic
Overwhelming numbers of early puberty cases among girls have been reported during the pandemic, according a report copublished by the Washington Post and The Fuller Project.
Early puberty is uncommon, affecting about 1 in every 5,000 to 10,000 children, with cases about 10 times higher in girls than boys. But since the pandemic started, doctors and parents around the world have noted a substantial surge in early puberty.
In some cases, girls as young as 5 have begun developing breasts and girls younger than 8 have started menstruation.
“I noticed that quite a few of my [girl patients] got their period after a lockdown,” Adiaha Spinks-Franklin, MD, a pediatrician at Texas Children’s Hospital, Houston, told the news outlets.
The condition, also called precocious puberty, is defined as puberty-related changes earlier than normal or expected, which starts around age 8 for girls and age 9 for boys. It can sometimes be caused by genetic syndromes, central nervous system issues, or tumors on the ovaries, adrenal glands, pituitary gland, or brain.
Pediatricians across the world have reported more precocious puberty cases, the news outlets reported, including in the United States, India, Italy, and Turkey.
A recent study found that more than 300 girls were referred to five pediatric endocrinology centers in Italy between March and September 2020, as opposed to 140 referrals during the same time period in 2019.
In another study, a Turkish pediatric endocrinology clinic reported 58 cases during the first year of the pandemic, as compared with 66 total cases during the 3 previous years.
Early puberty tends to mean there are other mental and physical issues, though in most cases, an exact cause can’t be found. Doctors have tied the current uptick to the stress of the pandemic and lockdowns, including reduced physical activity and increased consumption of unhealthy food, which are things linked to a higher risk of early puberty.
“I think it’s directly related to the amount of stress that the children have gone through,” Vaishakhi Rustagi, MD, a pediatric endocrinologist in Delhi, India, told the news outlets.
In a typical year, Dr. Rustagi sees about 20 patients with early puberty. Since mid-2020, she’s seen more than 300 girls with the condition. Imaging scans and ultrasounds haven’t found tumors, and the cause has been mostly unidentifiable, though Dr. Rustagi attributed it to stress and grief.
“These children have lost family members,” she said.
Early puberty is known to increase depression, eating disorders, substance abuse, and antisocial behavior, the news outlets reported.
The main treatment for the condition, a form of hormone therapy known as gonadotropin-releasing hormone analogue therapy, is known to work very well. But some patients and families may not seek treatment because of a lack of awareness or stigmas that come with menstruation.
A version of this article first appeared on WebMD.com.
Overwhelming numbers of early puberty cases among girls have been reported during the pandemic, according a report copublished by the Washington Post and The Fuller Project.
Early puberty is uncommon, affecting about 1 in every 5,000 to 10,000 children, with cases about 10 times higher in girls than boys. But since the pandemic started, doctors and parents around the world have noted a substantial surge in early puberty.
In some cases, girls as young as 5 have begun developing breasts and girls younger than 8 have started menstruation.
“I noticed that quite a few of my [girl patients] got their period after a lockdown,” Adiaha Spinks-Franklin, MD, a pediatrician at Texas Children’s Hospital, Houston, told the news outlets.
The condition, also called precocious puberty, is defined as puberty-related changes earlier than normal or expected, which starts around age 8 for girls and age 9 for boys. It can sometimes be caused by genetic syndromes, central nervous system issues, or tumors on the ovaries, adrenal glands, pituitary gland, or brain.
Pediatricians across the world have reported more precocious puberty cases, the news outlets reported, including in the United States, India, Italy, and Turkey.
A recent study found that more than 300 girls were referred to five pediatric endocrinology centers in Italy between March and September 2020, as opposed to 140 referrals during the same time period in 2019.
In another study, a Turkish pediatric endocrinology clinic reported 58 cases during the first year of the pandemic, as compared with 66 total cases during the 3 previous years.
Early puberty tends to mean there are other mental and physical issues, though in most cases, an exact cause can’t be found. Doctors have tied the current uptick to the stress of the pandemic and lockdowns, including reduced physical activity and increased consumption of unhealthy food, which are things linked to a higher risk of early puberty.
“I think it’s directly related to the amount of stress that the children have gone through,” Vaishakhi Rustagi, MD, a pediatric endocrinologist in Delhi, India, told the news outlets.
In a typical year, Dr. Rustagi sees about 20 patients with early puberty. Since mid-2020, she’s seen more than 300 girls with the condition. Imaging scans and ultrasounds haven’t found tumors, and the cause has been mostly unidentifiable, though Dr. Rustagi attributed it to stress and grief.
“These children have lost family members,” she said.
Early puberty is known to increase depression, eating disorders, substance abuse, and antisocial behavior, the news outlets reported.
The main treatment for the condition, a form of hormone therapy known as gonadotropin-releasing hormone analogue therapy, is known to work very well. But some patients and families may not seek treatment because of a lack of awareness or stigmas that come with menstruation.
A version of this article first appeared on WebMD.com.
Overwhelming numbers of early puberty cases among girls have been reported during the pandemic, according a report copublished by the Washington Post and The Fuller Project.
Early puberty is uncommon, affecting about 1 in every 5,000 to 10,000 children, with cases about 10 times higher in girls than boys. But since the pandemic started, doctors and parents around the world have noted a substantial surge in early puberty.
In some cases, girls as young as 5 have begun developing breasts and girls younger than 8 have started menstruation.
“I noticed that quite a few of my [girl patients] got their period after a lockdown,” Adiaha Spinks-Franklin, MD, a pediatrician at Texas Children’s Hospital, Houston, told the news outlets.
The condition, also called precocious puberty, is defined as puberty-related changes earlier than normal or expected, which starts around age 8 for girls and age 9 for boys. It can sometimes be caused by genetic syndromes, central nervous system issues, or tumors on the ovaries, adrenal glands, pituitary gland, or brain.
Pediatricians across the world have reported more precocious puberty cases, the news outlets reported, including in the United States, India, Italy, and Turkey.
A recent study found that more than 300 girls were referred to five pediatric endocrinology centers in Italy between March and September 2020, as opposed to 140 referrals during the same time period in 2019.
In another study, a Turkish pediatric endocrinology clinic reported 58 cases during the first year of the pandemic, as compared with 66 total cases during the 3 previous years.
Early puberty tends to mean there are other mental and physical issues, though in most cases, an exact cause can’t be found. Doctors have tied the current uptick to the stress of the pandemic and lockdowns, including reduced physical activity and increased consumption of unhealthy food, which are things linked to a higher risk of early puberty.
“I think it’s directly related to the amount of stress that the children have gone through,” Vaishakhi Rustagi, MD, a pediatric endocrinologist in Delhi, India, told the news outlets.
In a typical year, Dr. Rustagi sees about 20 patients with early puberty. Since mid-2020, she’s seen more than 300 girls with the condition. Imaging scans and ultrasounds haven’t found tumors, and the cause has been mostly unidentifiable, though Dr. Rustagi attributed it to stress and grief.
“These children have lost family members,” she said.
Early puberty is known to increase depression, eating disorders, substance abuse, and antisocial behavior, the news outlets reported.
The main treatment for the condition, a form of hormone therapy known as gonadotropin-releasing hormone analogue therapy, is known to work very well. But some patients and families may not seek treatment because of a lack of awareness or stigmas that come with menstruation.
A version of this article first appeared on WebMD.com.
Gene therapy demonstrates modest success in genetic blindness
SEATTLE – The therapy, delivered by intravitreal injection, uses an adeno-associated virus vector to deliver a corrected copy of the mutated ND4 mitochondrial gene.
LHON is a rare, maternally inherited mitochondrial mutation that can cause blindness, most commonly in young men, though it does not happen in all individuals with the mutation. The condition often starts with blindness in one eye, accompanied or followed shortly by blindness in the second eye. Researchers believe that the injected viral vector gets taken up retinal ganglion cells, where the mutated gene interferes with vision. Once synthesized, a mitochondria-targeting sequence facilitates transport of the protein to the mitochondria.
The study protocol called for injection of the therapy into one eye and a placebo into the other, using the patient as his or own placebo control. The results in the treated eye were encouraging, though modest. “This is not hitting it out of the ballpark. But for people whose vision is devastated by this disease, it certainly is a first step,” said Nancy J. Newman, MD, during a press conference held March 29 in advance of the 2022 annual meeting of the American Academy of Neurology.
Dr. Newman also noted a surprise finding: Visual improvement also occurred in the placebo-control eye. This was noted in previous studies, called RESCUE and REVERSE, and follow-up studies in monkeys found viral vector in the unaffected eye 3-6 months after an injection. “This would imply some kind of transport within retrograde up the opposite optic nerve after crossing in the chiasm to the eye, but this is going to take a fair bit of work to know exactly how that happens,” said Dr. Newman
Unfortunately, the phase 3 REFLECT study was designed before that process was understood. “This was not a case-control study by person, it was by eye. And that was a mistake, because it turns out there is a does appear to be second eye effects. We do not have naive controls here that did not receive any injection at all in any eye. That’s something that we will [do going] forward,” said Dr. Newman.
Despite the problem with placebo, the results were encouraging. “Those patients who had both eyes injected with the drug did better than in those who had one eye injected with drug and one eye injected with placebo, suggesting some sort of dose effect. There were no adverse events other than what we would expect from injecting [into] eyes. Those treated with the drug had more ocular inflammation, as would also be expected, but all were easily treated with topical medications,” said Dr. Newman.
What are the long-term effects?
Natalia Rost, MD, who chairs the AAN Science Committee, commented after the presentation: “We’re quite impressed with advances in gene therapy. The question is, are there early indications that this improvement in vision will have a lasting effect?”
Dr. Newman responded that ongoing data from earlier studies are also encouraging regarding the long-term effect of the treatment. At 4 years, there was a difference of 16.5 Early Treatment of Diabetic Retinopathy Study (ETDRS) letters equivalent between treated patients and natural history controls (P < .01), “which [does] suggest that this effect is maintained,” said Dr. Newman, who is a professor of ophthalmology and neurology at Emory University, Atlanta.
Dr. Rost also wondered if it would be possible to capture patients earlier in their disease process, in the hopes of countering degeneration before it becomes severe enough to impact vision. Dr. Newman answered by noting another surprise from the research. Previous studies had shown that intervention while only a single eye is affected had little impact on spread of the condition to the second eye, “which was very disappointing,” said Dr. Newman. When they stratified patients by time since vision loss, they found that those who received the therapy 6 months or later after vision loss had better responses than those who were treated earlier.
The mechanism of this counter-intuitive finding remains uncertain, “but we do know that acutely in this disease when people are just starting to lose this vision, during the first couple of months, they get swelling of the axons from these retinal ganglion cells. Our hypothesis is that swelling may actually act as a barrier for the drug to get into the retinal ganglion cell bodies themselves and be transfected. So it turns out that earlier may not be better,” said Dr. Newman.
The study included patients at 13 sites worldwide; 48 were treated bilaterally and 50 treated unilaterally. Just under 80% were male, the mean age was 31.5 years, and the mean duration of vision loss was 8.30 months.
After 1.5 years, the improvement in best-corrected visual acuity between second-affected eyes was stronger in the treatment eye, equivalent to +3 ETDRS letters. The first-affected eye improved by 19 ETDRS letters, and the second-affected eye improved by 16 (P < .0001). Improvement in placebo eyes was +13 ETDRS letters (P < .0001).
Dr. Rost has served on a scientific advisory board or data monitoring board for Omniox. Dr. Newman has consulted for GenSight, Santhera/Chiesi, and Neurophoenix, and has received research support from GenSight and Santhera/Chiesi.
SEATTLE – The therapy, delivered by intravitreal injection, uses an adeno-associated virus vector to deliver a corrected copy of the mutated ND4 mitochondrial gene.
LHON is a rare, maternally inherited mitochondrial mutation that can cause blindness, most commonly in young men, though it does not happen in all individuals with the mutation. The condition often starts with blindness in one eye, accompanied or followed shortly by blindness in the second eye. Researchers believe that the injected viral vector gets taken up retinal ganglion cells, where the mutated gene interferes with vision. Once synthesized, a mitochondria-targeting sequence facilitates transport of the protein to the mitochondria.
The study protocol called for injection of the therapy into one eye and a placebo into the other, using the patient as his or own placebo control. The results in the treated eye were encouraging, though modest. “This is not hitting it out of the ballpark. But for people whose vision is devastated by this disease, it certainly is a first step,” said Nancy J. Newman, MD, during a press conference held March 29 in advance of the 2022 annual meeting of the American Academy of Neurology.
Dr. Newman also noted a surprise finding: Visual improvement also occurred in the placebo-control eye. This was noted in previous studies, called RESCUE and REVERSE, and follow-up studies in monkeys found viral vector in the unaffected eye 3-6 months after an injection. “This would imply some kind of transport within retrograde up the opposite optic nerve after crossing in the chiasm to the eye, but this is going to take a fair bit of work to know exactly how that happens,” said Dr. Newman
Unfortunately, the phase 3 REFLECT study was designed before that process was understood. “This was not a case-control study by person, it was by eye. And that was a mistake, because it turns out there is a does appear to be second eye effects. We do not have naive controls here that did not receive any injection at all in any eye. That’s something that we will [do going] forward,” said Dr. Newman.
Despite the problem with placebo, the results were encouraging. “Those patients who had both eyes injected with the drug did better than in those who had one eye injected with drug and one eye injected with placebo, suggesting some sort of dose effect. There were no adverse events other than what we would expect from injecting [into] eyes. Those treated with the drug had more ocular inflammation, as would also be expected, but all were easily treated with topical medications,” said Dr. Newman.
What are the long-term effects?
Natalia Rost, MD, who chairs the AAN Science Committee, commented after the presentation: “We’re quite impressed with advances in gene therapy. The question is, are there early indications that this improvement in vision will have a lasting effect?”
Dr. Newman responded that ongoing data from earlier studies are also encouraging regarding the long-term effect of the treatment. At 4 years, there was a difference of 16.5 Early Treatment of Diabetic Retinopathy Study (ETDRS) letters equivalent between treated patients and natural history controls (P < .01), “which [does] suggest that this effect is maintained,” said Dr. Newman, who is a professor of ophthalmology and neurology at Emory University, Atlanta.
Dr. Rost also wondered if it would be possible to capture patients earlier in their disease process, in the hopes of countering degeneration before it becomes severe enough to impact vision. Dr. Newman answered by noting another surprise from the research. Previous studies had shown that intervention while only a single eye is affected had little impact on spread of the condition to the second eye, “which was very disappointing,” said Dr. Newman. When they stratified patients by time since vision loss, they found that those who received the therapy 6 months or later after vision loss had better responses than those who were treated earlier.
The mechanism of this counter-intuitive finding remains uncertain, “but we do know that acutely in this disease when people are just starting to lose this vision, during the first couple of months, they get swelling of the axons from these retinal ganglion cells. Our hypothesis is that swelling may actually act as a barrier for the drug to get into the retinal ganglion cell bodies themselves and be transfected. So it turns out that earlier may not be better,” said Dr. Newman.
The study included patients at 13 sites worldwide; 48 were treated bilaterally and 50 treated unilaterally. Just under 80% were male, the mean age was 31.5 years, and the mean duration of vision loss was 8.30 months.
After 1.5 years, the improvement in best-corrected visual acuity between second-affected eyes was stronger in the treatment eye, equivalent to +3 ETDRS letters. The first-affected eye improved by 19 ETDRS letters, and the second-affected eye improved by 16 (P < .0001). Improvement in placebo eyes was +13 ETDRS letters (P < .0001).
Dr. Rost has served on a scientific advisory board or data monitoring board for Omniox. Dr. Newman has consulted for GenSight, Santhera/Chiesi, and Neurophoenix, and has received research support from GenSight and Santhera/Chiesi.
SEATTLE – The therapy, delivered by intravitreal injection, uses an adeno-associated virus vector to deliver a corrected copy of the mutated ND4 mitochondrial gene.
LHON is a rare, maternally inherited mitochondrial mutation that can cause blindness, most commonly in young men, though it does not happen in all individuals with the mutation. The condition often starts with blindness in one eye, accompanied or followed shortly by blindness in the second eye. Researchers believe that the injected viral vector gets taken up retinal ganglion cells, where the mutated gene interferes with vision. Once synthesized, a mitochondria-targeting sequence facilitates transport of the protein to the mitochondria.
The study protocol called for injection of the therapy into one eye and a placebo into the other, using the patient as his or own placebo control. The results in the treated eye were encouraging, though modest. “This is not hitting it out of the ballpark. But for people whose vision is devastated by this disease, it certainly is a first step,” said Nancy J. Newman, MD, during a press conference held March 29 in advance of the 2022 annual meeting of the American Academy of Neurology.
Dr. Newman also noted a surprise finding: Visual improvement also occurred in the placebo-control eye. This was noted in previous studies, called RESCUE and REVERSE, and follow-up studies in monkeys found viral vector in the unaffected eye 3-6 months after an injection. “This would imply some kind of transport within retrograde up the opposite optic nerve after crossing in the chiasm to the eye, but this is going to take a fair bit of work to know exactly how that happens,” said Dr. Newman
Unfortunately, the phase 3 REFLECT study was designed before that process was understood. “This was not a case-control study by person, it was by eye. And that was a mistake, because it turns out there is a does appear to be second eye effects. We do not have naive controls here that did not receive any injection at all in any eye. That’s something that we will [do going] forward,” said Dr. Newman.
Despite the problem with placebo, the results were encouraging. “Those patients who had both eyes injected with the drug did better than in those who had one eye injected with drug and one eye injected with placebo, suggesting some sort of dose effect. There were no adverse events other than what we would expect from injecting [into] eyes. Those treated with the drug had more ocular inflammation, as would also be expected, but all were easily treated with topical medications,” said Dr. Newman.
What are the long-term effects?
Natalia Rost, MD, who chairs the AAN Science Committee, commented after the presentation: “We’re quite impressed with advances in gene therapy. The question is, are there early indications that this improvement in vision will have a lasting effect?”
Dr. Newman responded that ongoing data from earlier studies are also encouraging regarding the long-term effect of the treatment. At 4 years, there was a difference of 16.5 Early Treatment of Diabetic Retinopathy Study (ETDRS) letters equivalent between treated patients and natural history controls (P < .01), “which [does] suggest that this effect is maintained,” said Dr. Newman, who is a professor of ophthalmology and neurology at Emory University, Atlanta.
Dr. Rost also wondered if it would be possible to capture patients earlier in their disease process, in the hopes of countering degeneration before it becomes severe enough to impact vision. Dr. Newman answered by noting another surprise from the research. Previous studies had shown that intervention while only a single eye is affected had little impact on spread of the condition to the second eye, “which was very disappointing,” said Dr. Newman. When they stratified patients by time since vision loss, they found that those who received the therapy 6 months or later after vision loss had better responses than those who were treated earlier.
The mechanism of this counter-intuitive finding remains uncertain, “but we do know that acutely in this disease when people are just starting to lose this vision, during the first couple of months, they get swelling of the axons from these retinal ganglion cells. Our hypothesis is that swelling may actually act as a barrier for the drug to get into the retinal ganglion cell bodies themselves and be transfected. So it turns out that earlier may not be better,” said Dr. Newman.
The study included patients at 13 sites worldwide; 48 were treated bilaterally and 50 treated unilaterally. Just under 80% were male, the mean age was 31.5 years, and the mean duration of vision loss was 8.30 months.
After 1.5 years, the improvement in best-corrected visual acuity between second-affected eyes was stronger in the treatment eye, equivalent to +3 ETDRS letters. The first-affected eye improved by 19 ETDRS letters, and the second-affected eye improved by 16 (P < .0001). Improvement in placebo eyes was +13 ETDRS letters (P < .0001).
Dr. Rost has served on a scientific advisory board or data monitoring board for Omniox. Dr. Newman has consulted for GenSight, Santhera/Chiesi, and Neurophoenix, and has received research support from GenSight and Santhera/Chiesi.
AT AAN 2022
IV gentamicin improves junctional epidermolysis bullosa in children
Intravenous (JEB) caused by nonsense variants.
The newly generated structural protein persisted during the 3-month randomized clinical trial and was associated with significant wound closure – with no signs of ototoxic effects, nephrotoxic effects, or anti–laminin 332 autoantibody induction, investigators recently reported in JAMA Dermatology.
JEB is a rare, autosomal recessive disorder caused mainly by nonsense variants (i.e., mutations) in the LAMA3, LAMB3, or LAMC2 genes that encode laminin, resulting in widespread blisters and erosions of the skin. Current treatment is limited to supportive management and palliative care, and children with its severe subtype are likely to die within the first year of life.
“With data indicating a robust response to short-term gentamicin treatment and the marked stability of laminin 332, we envision that gentamicin could be delivered as a short-term pulse therapy every 2-3 months for patients with JEB caused by nonsense variants,” the researchers wrote.
Of the five patients, ages 3 months to 10 years, three received 7.5 mg/kg IV gentamicin daily for 14 days, and two received 10 mg/kg daily for 24 days at the University of Southern California, Los Angeles.
All had confirmed nonsense variants in LAMA3 or LAMB3 in one or two alleles, and all had minimal laminin 332 expression at baseline as determined by immunofluorescence. After treatment, each of the children had increased, sustained expression of laminin 332.
The researchers monitored three open wounds in each patient. By 1 month, seven of nine wounds in those receiving the lower-dose therapy and all of the wounds in those receiving the higher-dose therapy showed at least 50% closure. By 3 months, eight of nine wounds in the lower-dose group, and all wounds in the higher-dose group showed greater than 85% closure.
In an interview, senior investigators Mei Chen, PhD, professor of dermatology, and David T. Woodley, MD, professor and chair of dermatology, both at USC, emphasized laminin’s long half-life.“Once these skin structural proteins are generated at the dermal-epidermal junction, they are long-lasting structures, which means the therapy can be pulsed rather than continuously delivered, which can obviate some of the known side effects of the medication,” Dr. Woodley said.
Gentamicin, an aminoglycoside, works as a “read-through therapy,” inducing ribosomal read-through of premature termination codons (PTCs) caused by nonsense mutations. The read-through allows translation to proceed and full-length proteins to be generated.
Gentamicin read-through therapy is also being investigated for recessive dystrophic epidermolysis bullosa (RDEB) attributable to nonsense mutations. The culprit mutations in this form of EB occur in a gene that encodes collagen type VII alpha 1, which, like laminin, is responsible for dermal-epidermal adherence. A clinical trial of intravenous gentamicin for RDEB is ongoing at USC, Dr. Chen said.
EBS-MD case report
It may also have a role in treating epidermolysis bullosa simplex with muscular dystrophy (EBS-MD), according to investigators in Madrid. Their case report, published in JAMA Dermatology, details how two 14-day courses of infused gentamicin therapy were followed by re-expression of plectin in the skin for 4-5 months and mild improvement in symptoms in one patient, a woman in her 30s, with a homozygous nonsense variant in PLEC1.
In an editorial accompanying the two reports, Anna L. Bruckner, MD, MSCS, professor of dermatology, University of Colorado at Denver, Aurora, and colleagues expressed cautious optimism and said that additional research on the feasibility, possible cumulative toxic effects, risk of microbial resistance, and overall clinical relevance is needed.
Still, the “investigators should be applauded for taking advantage of a readily available systemic treatment to target cutaneous and extracutaneous symptoms of patients who have very limited treatment options at this time,” they wrote. While all forms of EB are considered orphan disorders, JEB and EBS-MD have received less research attention than RDEB.
The JEB study evaluated patients with clinical assessments/quality of life surveys and with a validated clinical score that considers skin and mucosae – the Epidermolysis Bullosa Disease Activity and Scarring Index (EBDASI). There were small positive changes in EBDASI scores, but data were incomplete and therefore difficult to interpret.
A “noteworthy” finding, the authors wrote, were improvements in emotions and functioning in two of the children who were eligible given their older ages for assessment with the Skindex-16 quality-of-life survey. The improvements suggest “potential psychosocial benefits” of the gentamicin therapy.
The JEB study was supported in part by grants from the EB Research Partnership and EB Medical Research Foundation and an award from the Congressionally Directed Medical Research Program. In addition to the grants, Dr. Woodley and Dr. Chen reported receiving personal fees from Phoenix Tissue Repair outside of the submitted work. For the EBS-MD case report, the authors reported no disclosures. Dr. Bruckner, corresponding author of the editorial, reported grants from several companies outside the submitted work.
Intravenous (JEB) caused by nonsense variants.
The newly generated structural protein persisted during the 3-month randomized clinical trial and was associated with significant wound closure – with no signs of ototoxic effects, nephrotoxic effects, or anti–laminin 332 autoantibody induction, investigators recently reported in JAMA Dermatology.
JEB is a rare, autosomal recessive disorder caused mainly by nonsense variants (i.e., mutations) in the LAMA3, LAMB3, or LAMC2 genes that encode laminin, resulting in widespread blisters and erosions of the skin. Current treatment is limited to supportive management and palliative care, and children with its severe subtype are likely to die within the first year of life.
“With data indicating a robust response to short-term gentamicin treatment and the marked stability of laminin 332, we envision that gentamicin could be delivered as a short-term pulse therapy every 2-3 months for patients with JEB caused by nonsense variants,” the researchers wrote.
Of the five patients, ages 3 months to 10 years, three received 7.5 mg/kg IV gentamicin daily for 14 days, and two received 10 mg/kg daily for 24 days at the University of Southern California, Los Angeles.
All had confirmed nonsense variants in LAMA3 or LAMB3 in one or two alleles, and all had minimal laminin 332 expression at baseline as determined by immunofluorescence. After treatment, each of the children had increased, sustained expression of laminin 332.
The researchers monitored three open wounds in each patient. By 1 month, seven of nine wounds in those receiving the lower-dose therapy and all of the wounds in those receiving the higher-dose therapy showed at least 50% closure. By 3 months, eight of nine wounds in the lower-dose group, and all wounds in the higher-dose group showed greater than 85% closure.
In an interview, senior investigators Mei Chen, PhD, professor of dermatology, and David T. Woodley, MD, professor and chair of dermatology, both at USC, emphasized laminin’s long half-life.“Once these skin structural proteins are generated at the dermal-epidermal junction, they are long-lasting structures, which means the therapy can be pulsed rather than continuously delivered, which can obviate some of the known side effects of the medication,” Dr. Woodley said.
Gentamicin, an aminoglycoside, works as a “read-through therapy,” inducing ribosomal read-through of premature termination codons (PTCs) caused by nonsense mutations. The read-through allows translation to proceed and full-length proteins to be generated.
Gentamicin read-through therapy is also being investigated for recessive dystrophic epidermolysis bullosa (RDEB) attributable to nonsense mutations. The culprit mutations in this form of EB occur in a gene that encodes collagen type VII alpha 1, which, like laminin, is responsible for dermal-epidermal adherence. A clinical trial of intravenous gentamicin for RDEB is ongoing at USC, Dr. Chen said.
EBS-MD case report
It may also have a role in treating epidermolysis bullosa simplex with muscular dystrophy (EBS-MD), according to investigators in Madrid. Their case report, published in JAMA Dermatology, details how two 14-day courses of infused gentamicin therapy were followed by re-expression of plectin in the skin for 4-5 months and mild improvement in symptoms in one patient, a woman in her 30s, with a homozygous nonsense variant in PLEC1.
In an editorial accompanying the two reports, Anna L. Bruckner, MD, MSCS, professor of dermatology, University of Colorado at Denver, Aurora, and colleagues expressed cautious optimism and said that additional research on the feasibility, possible cumulative toxic effects, risk of microbial resistance, and overall clinical relevance is needed.
Still, the “investigators should be applauded for taking advantage of a readily available systemic treatment to target cutaneous and extracutaneous symptoms of patients who have very limited treatment options at this time,” they wrote. While all forms of EB are considered orphan disorders, JEB and EBS-MD have received less research attention than RDEB.
The JEB study evaluated patients with clinical assessments/quality of life surveys and with a validated clinical score that considers skin and mucosae – the Epidermolysis Bullosa Disease Activity and Scarring Index (EBDASI). There were small positive changes in EBDASI scores, but data were incomplete and therefore difficult to interpret.
A “noteworthy” finding, the authors wrote, were improvements in emotions and functioning in two of the children who were eligible given their older ages for assessment with the Skindex-16 quality-of-life survey. The improvements suggest “potential psychosocial benefits” of the gentamicin therapy.
The JEB study was supported in part by grants from the EB Research Partnership and EB Medical Research Foundation and an award from the Congressionally Directed Medical Research Program. In addition to the grants, Dr. Woodley and Dr. Chen reported receiving personal fees from Phoenix Tissue Repair outside of the submitted work. For the EBS-MD case report, the authors reported no disclosures. Dr. Bruckner, corresponding author of the editorial, reported grants from several companies outside the submitted work.
Intravenous (JEB) caused by nonsense variants.
The newly generated structural protein persisted during the 3-month randomized clinical trial and was associated with significant wound closure – with no signs of ototoxic effects, nephrotoxic effects, or anti–laminin 332 autoantibody induction, investigators recently reported in JAMA Dermatology.
JEB is a rare, autosomal recessive disorder caused mainly by nonsense variants (i.e., mutations) in the LAMA3, LAMB3, or LAMC2 genes that encode laminin, resulting in widespread blisters and erosions of the skin. Current treatment is limited to supportive management and palliative care, and children with its severe subtype are likely to die within the first year of life.
“With data indicating a robust response to short-term gentamicin treatment and the marked stability of laminin 332, we envision that gentamicin could be delivered as a short-term pulse therapy every 2-3 months for patients with JEB caused by nonsense variants,” the researchers wrote.
Of the five patients, ages 3 months to 10 years, three received 7.5 mg/kg IV gentamicin daily for 14 days, and two received 10 mg/kg daily for 24 days at the University of Southern California, Los Angeles.
All had confirmed nonsense variants in LAMA3 or LAMB3 in one or two alleles, and all had minimal laminin 332 expression at baseline as determined by immunofluorescence. After treatment, each of the children had increased, sustained expression of laminin 332.
The researchers monitored three open wounds in each patient. By 1 month, seven of nine wounds in those receiving the lower-dose therapy and all of the wounds in those receiving the higher-dose therapy showed at least 50% closure. By 3 months, eight of nine wounds in the lower-dose group, and all wounds in the higher-dose group showed greater than 85% closure.
In an interview, senior investigators Mei Chen, PhD, professor of dermatology, and David T. Woodley, MD, professor and chair of dermatology, both at USC, emphasized laminin’s long half-life.“Once these skin structural proteins are generated at the dermal-epidermal junction, they are long-lasting structures, which means the therapy can be pulsed rather than continuously delivered, which can obviate some of the known side effects of the medication,” Dr. Woodley said.
Gentamicin, an aminoglycoside, works as a “read-through therapy,” inducing ribosomal read-through of premature termination codons (PTCs) caused by nonsense mutations. The read-through allows translation to proceed and full-length proteins to be generated.
Gentamicin read-through therapy is also being investigated for recessive dystrophic epidermolysis bullosa (RDEB) attributable to nonsense mutations. The culprit mutations in this form of EB occur in a gene that encodes collagen type VII alpha 1, which, like laminin, is responsible for dermal-epidermal adherence. A clinical trial of intravenous gentamicin for RDEB is ongoing at USC, Dr. Chen said.
EBS-MD case report
It may also have a role in treating epidermolysis bullosa simplex with muscular dystrophy (EBS-MD), according to investigators in Madrid. Their case report, published in JAMA Dermatology, details how two 14-day courses of infused gentamicin therapy were followed by re-expression of plectin in the skin for 4-5 months and mild improvement in symptoms in one patient, a woman in her 30s, with a homozygous nonsense variant in PLEC1.
In an editorial accompanying the two reports, Anna L. Bruckner, MD, MSCS, professor of dermatology, University of Colorado at Denver, Aurora, and colleagues expressed cautious optimism and said that additional research on the feasibility, possible cumulative toxic effects, risk of microbial resistance, and overall clinical relevance is needed.
Still, the “investigators should be applauded for taking advantage of a readily available systemic treatment to target cutaneous and extracutaneous symptoms of patients who have very limited treatment options at this time,” they wrote. While all forms of EB are considered orphan disorders, JEB and EBS-MD have received less research attention than RDEB.
The JEB study evaluated patients with clinical assessments/quality of life surveys and with a validated clinical score that considers skin and mucosae – the Epidermolysis Bullosa Disease Activity and Scarring Index (EBDASI). There were small positive changes in EBDASI scores, but data were incomplete and therefore difficult to interpret.
A “noteworthy” finding, the authors wrote, were improvements in emotions and functioning in two of the children who were eligible given their older ages for assessment with the Skindex-16 quality-of-life survey. The improvements suggest “potential psychosocial benefits” of the gentamicin therapy.
The JEB study was supported in part by grants from the EB Research Partnership and EB Medical Research Foundation and an award from the Congressionally Directed Medical Research Program. In addition to the grants, Dr. Woodley and Dr. Chen reported receiving personal fees from Phoenix Tissue Repair outside of the submitted work. For the EBS-MD case report, the authors reported no disclosures. Dr. Bruckner, corresponding author of the editorial, reported grants from several companies outside the submitted work.
FROM JAMA DERMATOLOGY
FDA advisory panel rejects new ALS drug
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.
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.
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.
Dupilumab treats itch and clears lesions in prurigo nodularis patients
BOSTON – of treatment, in a phase 3 trial presented at the American Academy of Dermatology 2022 Annual Meeting.
There are currently no Food and Drug Administration–approved systemic therapies for PN. Although several treatments for the disease are used off label for the condition, such as ultraviolet light therapy and immunosuppressive agents, moderate to severe PN is usually difficult to control, noted Gil Yosipovitch, MD, director of the Miami Itch Center at the University of Miami Miller School of Medicine, Florida. He led the research and presented the findings at the conference.
“Many dermatologists feel very uncomfortable dealing with these patients because they suffer from chronicity, they are miserable, and previously, the drugs didn’t work well,” Dr. Yosipovitch told this news organization. The results from this trial “are very promising,” he said. “It opens a new field of treatment for itchy conditions.”
The trial, named LIBERTY-PN PRIME2, enrolled patients aged 18-80 who had been living with PN for at least 3 months. Patients had at least 20 lesions at baseline as well as severe itch, defined as a score of 7 or greater on the Worst Itch Numerical Rating Scale (WI-NRS). The scale ranges from 0 (no itch) to 10 (worst itch imaginable). Participants also had a history of treatment failure with medium to super-potent topical corticosteroids (TCSs), or treatment with TCSs was not medically advisable for them.
The randomized, double-blinded study enrolled 160 adults with PN. Of those, 78 were assigned to the treatment arm and received a 600-mg loading dose of dupilumab, administered subcutaneously, followed by 300-mg doses every 2 weeks for 24 weeks; 82 patients were allocated to receive placebo.
During the study, 25 patients in the placebo arm discontinued treatment. In the treatment arm, one patient was not treated and two discontinued treatment due to lack of efficacy.
The primary endpoint of the study was a reduction of at least 4 points on the WI-NRS at 12 weeks. Secondary endpoints included at least a 4-point WI-NRS reduction at 24 weeks and clear to nearly clear skin, defined as having a score of 0 or 1 on the Investigator’s Global Assessment PN-Stage (IGN PN-S). The scale ranges from 0 (clear) to 4 (severe).
At 12 weeks, 37.2% of patients given dupilumab reported a reduction of at least 4 points in WI-NRS, compared with 22.0% of patients given placebo (P = .0216). By 24 weeks, 57.7% of adults who received dupilumab achieved a greater than or equal to 4-point reduction in WI-NRS, compared with 19.5% of those who received placebo (P < .0001). Additionally, 44.9% of participants in the treatment arm achieved a score of 0 or 1 on the IGA PN-S, compared with 15.9% of those in the placebo arm (P < .0001).
Forty-four participants who received dupilumab (57.1%) and 42 participants who received placebo (51.2%) reported at least one treatment-emergent adverse event (TEAE) during the study, though none of these events were serious. The most common TEAE in the study was headache, occurring in five patients taking placebo and four patients receiving dupilumab. In the dupilumab group, there were five cases of herpes virus infection, four non-herpes skin infections, and three cases of conjunctivitis. In the placebo group, seven non-herpes skin infections were reported.
Sanofi and Regeneron, who jointly developed dupilumab, plan to file for regulatory approval for dupilumab for PN “around the world” in the first half of this year, according to a press release.
“It’s great news and a step in the right direction,” Sarina Elmariah, MD, PhD, a dermatologist at Massachusetts General Hospital and instructor of dermatology at Harvard Medical School, both in Boston, told this news organization. She was not involved with the research.
“We’re finally starting to shed light on this condition and its pathogenesis,” she said. She noted that other potential therapeutics for PN are also in development. “It’s reflective of the fact that we are making strides in this area.”
Sanofi and Regeneron Pharmaceuticals sponsored the LIBERTY-PN PRIME2 trial. Dr. Yosipovitch has reported financial relationships with Bellus Health, Eli Lilly, Galderma, GSK, Kiniksa Pharmaceuticals, LEO Pharma, Novartis, Pfizer, Regeneron, Sanofi, and Trevi Therapeutics. Dr. Elmariah is on the advisory boards of Sanofi, Galderma, and Trevi Therapeutics.
A version of this article first appeared on Medscape.com.
BOSTON – of treatment, in a phase 3 trial presented at the American Academy of Dermatology 2022 Annual Meeting.
There are currently no Food and Drug Administration–approved systemic therapies for PN. Although several treatments for the disease are used off label for the condition, such as ultraviolet light therapy and immunosuppressive agents, moderate to severe PN is usually difficult to control, noted Gil Yosipovitch, MD, director of the Miami Itch Center at the University of Miami Miller School of Medicine, Florida. He led the research and presented the findings at the conference.
“Many dermatologists feel very uncomfortable dealing with these patients because they suffer from chronicity, they are miserable, and previously, the drugs didn’t work well,” Dr. Yosipovitch told this news organization. The results from this trial “are very promising,” he said. “It opens a new field of treatment for itchy conditions.”
The trial, named LIBERTY-PN PRIME2, enrolled patients aged 18-80 who had been living with PN for at least 3 months. Patients had at least 20 lesions at baseline as well as severe itch, defined as a score of 7 or greater on the Worst Itch Numerical Rating Scale (WI-NRS). The scale ranges from 0 (no itch) to 10 (worst itch imaginable). Participants also had a history of treatment failure with medium to super-potent topical corticosteroids (TCSs), or treatment with TCSs was not medically advisable for them.
The randomized, double-blinded study enrolled 160 adults with PN. Of those, 78 were assigned to the treatment arm and received a 600-mg loading dose of dupilumab, administered subcutaneously, followed by 300-mg doses every 2 weeks for 24 weeks; 82 patients were allocated to receive placebo.
During the study, 25 patients in the placebo arm discontinued treatment. In the treatment arm, one patient was not treated and two discontinued treatment due to lack of efficacy.
The primary endpoint of the study was a reduction of at least 4 points on the WI-NRS at 12 weeks. Secondary endpoints included at least a 4-point WI-NRS reduction at 24 weeks and clear to nearly clear skin, defined as having a score of 0 or 1 on the Investigator’s Global Assessment PN-Stage (IGN PN-S). The scale ranges from 0 (clear) to 4 (severe).
At 12 weeks, 37.2% of patients given dupilumab reported a reduction of at least 4 points in WI-NRS, compared with 22.0% of patients given placebo (P = .0216). By 24 weeks, 57.7% of adults who received dupilumab achieved a greater than or equal to 4-point reduction in WI-NRS, compared with 19.5% of those who received placebo (P < .0001). Additionally, 44.9% of participants in the treatment arm achieved a score of 0 or 1 on the IGA PN-S, compared with 15.9% of those in the placebo arm (P < .0001).
Forty-four participants who received dupilumab (57.1%) and 42 participants who received placebo (51.2%) reported at least one treatment-emergent adverse event (TEAE) during the study, though none of these events were serious. The most common TEAE in the study was headache, occurring in five patients taking placebo and four patients receiving dupilumab. In the dupilumab group, there were five cases of herpes virus infection, four non-herpes skin infections, and three cases of conjunctivitis. In the placebo group, seven non-herpes skin infections were reported.
Sanofi and Regeneron, who jointly developed dupilumab, plan to file for regulatory approval for dupilumab for PN “around the world” in the first half of this year, according to a press release.
“It’s great news and a step in the right direction,” Sarina Elmariah, MD, PhD, a dermatologist at Massachusetts General Hospital and instructor of dermatology at Harvard Medical School, both in Boston, told this news organization. She was not involved with the research.
“We’re finally starting to shed light on this condition and its pathogenesis,” she said. She noted that other potential therapeutics for PN are also in development. “It’s reflective of the fact that we are making strides in this area.”
Sanofi and Regeneron Pharmaceuticals sponsored the LIBERTY-PN PRIME2 trial. Dr. Yosipovitch has reported financial relationships with Bellus Health, Eli Lilly, Galderma, GSK, Kiniksa Pharmaceuticals, LEO Pharma, Novartis, Pfizer, Regeneron, Sanofi, and Trevi Therapeutics. Dr. Elmariah is on the advisory boards of Sanofi, Galderma, and Trevi Therapeutics.
A version of this article first appeared on Medscape.com.
BOSTON – of treatment, in a phase 3 trial presented at the American Academy of Dermatology 2022 Annual Meeting.
There are currently no Food and Drug Administration–approved systemic therapies for PN. Although several treatments for the disease are used off label for the condition, such as ultraviolet light therapy and immunosuppressive agents, moderate to severe PN is usually difficult to control, noted Gil Yosipovitch, MD, director of the Miami Itch Center at the University of Miami Miller School of Medicine, Florida. He led the research and presented the findings at the conference.
“Many dermatologists feel very uncomfortable dealing with these patients because they suffer from chronicity, they are miserable, and previously, the drugs didn’t work well,” Dr. Yosipovitch told this news organization. The results from this trial “are very promising,” he said. “It opens a new field of treatment for itchy conditions.”
The trial, named LIBERTY-PN PRIME2, enrolled patients aged 18-80 who had been living with PN for at least 3 months. Patients had at least 20 lesions at baseline as well as severe itch, defined as a score of 7 or greater on the Worst Itch Numerical Rating Scale (WI-NRS). The scale ranges from 0 (no itch) to 10 (worst itch imaginable). Participants also had a history of treatment failure with medium to super-potent topical corticosteroids (TCSs), or treatment with TCSs was not medically advisable for them.
The randomized, double-blinded study enrolled 160 adults with PN. Of those, 78 were assigned to the treatment arm and received a 600-mg loading dose of dupilumab, administered subcutaneously, followed by 300-mg doses every 2 weeks for 24 weeks; 82 patients were allocated to receive placebo.
During the study, 25 patients in the placebo arm discontinued treatment. In the treatment arm, one patient was not treated and two discontinued treatment due to lack of efficacy.
The primary endpoint of the study was a reduction of at least 4 points on the WI-NRS at 12 weeks. Secondary endpoints included at least a 4-point WI-NRS reduction at 24 weeks and clear to nearly clear skin, defined as having a score of 0 or 1 on the Investigator’s Global Assessment PN-Stage (IGN PN-S). The scale ranges from 0 (clear) to 4 (severe).
At 12 weeks, 37.2% of patients given dupilumab reported a reduction of at least 4 points in WI-NRS, compared with 22.0% of patients given placebo (P = .0216). By 24 weeks, 57.7% of adults who received dupilumab achieved a greater than or equal to 4-point reduction in WI-NRS, compared with 19.5% of those who received placebo (P < .0001). Additionally, 44.9% of participants in the treatment arm achieved a score of 0 or 1 on the IGA PN-S, compared with 15.9% of those in the placebo arm (P < .0001).
Forty-four participants who received dupilumab (57.1%) and 42 participants who received placebo (51.2%) reported at least one treatment-emergent adverse event (TEAE) during the study, though none of these events were serious. The most common TEAE in the study was headache, occurring in five patients taking placebo and four patients receiving dupilumab. In the dupilumab group, there were five cases of herpes virus infection, four non-herpes skin infections, and three cases of conjunctivitis. In the placebo group, seven non-herpes skin infections were reported.
Sanofi and Regeneron, who jointly developed dupilumab, plan to file for regulatory approval for dupilumab for PN “around the world” in the first half of this year, according to a press release.
“It’s great news and a step in the right direction,” Sarina Elmariah, MD, PhD, a dermatologist at Massachusetts General Hospital and instructor of dermatology at Harvard Medical School, both in Boston, told this news organization. She was not involved with the research.
“We’re finally starting to shed light on this condition and its pathogenesis,” she said. She noted that other potential therapeutics for PN are also in development. “It’s reflective of the fact that we are making strides in this area.”
Sanofi and Regeneron Pharmaceuticals sponsored the LIBERTY-PN PRIME2 trial. Dr. Yosipovitch has reported financial relationships with Bellus Health, Eli Lilly, Galderma, GSK, Kiniksa Pharmaceuticals, LEO Pharma, Novartis, Pfizer, Regeneron, Sanofi, and Trevi Therapeutics. Dr. Elmariah is on the advisory boards of Sanofi, Galderma, and Trevi Therapeutics.
A version of this article first appeared on Medscape.com.
AT AAD 2022
Surgery in CJD patients a potential risk factor for transmission
About one in six patients with Creutzfeldt-Jakob disease (CJD) undergo surgery, raising the risk of iatrogenic transmission of this rare but universally fatal prion disease.
In a retrospective analysis, researchers found that 26 of 121 (21%) patients with probable or definite CJD at four U.S. academic medical centers underwent a total of 55 procedures.
These included high-risk procedures for two patients with neuropathologically proven CJD. One underwent ophthalmic artery aneurysm clipping for unruptured aneurysm, and the other underwent diagnostic brain biopsy.
“The findings were definitely surprising to me and my team – particularly the high frequency with which patients with an irreversible and particularly transmissible neurologic disease underwent invasive medical procedures either just before or shortly after the emergence of symptoms later attributed to CJD,” study investigator Gregory Day, MD, with the Mayo Clinic, Jacksonville, Fla., said in an interview.
The study was published online March 9, 2022, in JAMA Network Open.
Poor infection control
The investigators noted that the majority of CJD cases are sporadic or are inherited, but research shows that prion transmission can occur via contaminated tissues or reusable medical equipment.
While the risk of iatrogenic transmission is highest following procedures involving the central nervous system, where prion burden is highest, experimental models suggest CJD transmission can occur after contact with other tissues, including nasal mucosa, lung, lymph nodes, and spleen, the researchers noted.
“If these models are accurate, surgical procedures involving these tissues may pose a risk to patients,” the investigators wrote.
To determine the potential scope of this problem, the researchers examined the frequency of invasive procedures performed in patients with CJD at four tertiary care centers.
“In several cases, these procedures were done with clear indications [such as] fixation or joint replacement following a fracture. In several others, however, the procedures were unlikely to help the patient. For instance, a hip replacement for walking difficulties that were actually due to changes in the brain due to CJD,” Dr. Day said.
“Even more surprising was the low frequency with which appropriate surgical precautions/infection control procedures were used in patients with established diagnoses of CJD,” he noted.
Only one procedure was performed with sterilization techniques adequate to prevent CJD.
Dr. Day said the findings aren’t necessarily cause for immediate alarm, but they do highlight an area for potential improvement, including better screening of patients who have new and unexplained symptoms before proceeding with surgery, especially surgery of the central nervous system, where prion burden is high.
Another potential solution is to develop and support program surveillance and to work with public health organizations such the Centers for Disease Control and Prevention and the National Prion Disease Pathology Surveillance Center to elicit a surgical history in patients diagnosed with prion disease.
“Active nationwide surveillance is needed to determine the true scope of this potential problem and to develop strategies to mitigate the potential risk of iatrogenic prion transmission to future patients,” Dr. Day said.
True prevalence unknown
The authors of an invited commentary noted that, while most CJD infections occur sporadically, iatrogenic transmission is possible. Approximately 500 such cases have been reported worldwide to date.
“Yet, reported transmission from surgical procedures remains rare, with fewer than 10 confirmed CJD cases described in the literature, although the true prevalence is difficult to quantify as confirmed diagnosis requires autopsy,” wrote Beatrice Sun, MD, and Joseph Forrester, MD, with the department of surgery, Stanford (Calif.) University.
They noted that, over a 15-year period, 19 suspected iatrogenic CJD exposures were reported to the CDC – two from ophthalmology procedures, and 17 from neurosurgical procedures.
In all 19 cases, the diagnosis of CJD was unknown before the intervention, and all surgical instruments underwent normal decontamination protocols, which are inadequate to eradicate prion disease.
For patients with suspected or confirmed CJD, the World Health Organization has published infection control guidelines to prevent transmission of spongiform encephalopathies.
The guidelines recommend proper communication with all staff involved in the surgical procedure and the sterilization of supplies to be aware of potential exposure; minimizing the number of staff in the operating room; using single-use equipment whenever possible and disposing of it by incineration; using protective coverings for all nondisposable equipment; and scheduling such procedures at the end of the day to allow adequate time for decontamination.
Funding for the study was provided by the National Institutes of Health. Dr. Day owns stock in ANI Pharmaceuticals; serves as a consultant for Parabon Nanolabs, as a topic editor (dementia) for DynaMed, and as the clinical director of the Anti-NMDA Receptor Encephalitis Foundation (uncompensated). Dr. Forrester reported receiving unrestricted research funding from Varian and has received grant funding from the Surgical Infections Society.
A version of this article first appeared on Medscape.com.
About one in six patients with Creutzfeldt-Jakob disease (CJD) undergo surgery, raising the risk of iatrogenic transmission of this rare but universally fatal prion disease.
In a retrospective analysis, researchers found that 26 of 121 (21%) patients with probable or definite CJD at four U.S. academic medical centers underwent a total of 55 procedures.
These included high-risk procedures for two patients with neuropathologically proven CJD. One underwent ophthalmic artery aneurysm clipping for unruptured aneurysm, and the other underwent diagnostic brain biopsy.
“The findings were definitely surprising to me and my team – particularly the high frequency with which patients with an irreversible and particularly transmissible neurologic disease underwent invasive medical procedures either just before or shortly after the emergence of symptoms later attributed to CJD,” study investigator Gregory Day, MD, with the Mayo Clinic, Jacksonville, Fla., said in an interview.
The study was published online March 9, 2022, in JAMA Network Open.
Poor infection control
The investigators noted that the majority of CJD cases are sporadic or are inherited, but research shows that prion transmission can occur via contaminated tissues or reusable medical equipment.
While the risk of iatrogenic transmission is highest following procedures involving the central nervous system, where prion burden is highest, experimental models suggest CJD transmission can occur after contact with other tissues, including nasal mucosa, lung, lymph nodes, and spleen, the researchers noted.
“If these models are accurate, surgical procedures involving these tissues may pose a risk to patients,” the investigators wrote.
To determine the potential scope of this problem, the researchers examined the frequency of invasive procedures performed in patients with CJD at four tertiary care centers.
“In several cases, these procedures were done with clear indications [such as] fixation or joint replacement following a fracture. In several others, however, the procedures were unlikely to help the patient. For instance, a hip replacement for walking difficulties that were actually due to changes in the brain due to CJD,” Dr. Day said.
“Even more surprising was the low frequency with which appropriate surgical precautions/infection control procedures were used in patients with established diagnoses of CJD,” he noted.
Only one procedure was performed with sterilization techniques adequate to prevent CJD.
Dr. Day said the findings aren’t necessarily cause for immediate alarm, but they do highlight an area for potential improvement, including better screening of patients who have new and unexplained symptoms before proceeding with surgery, especially surgery of the central nervous system, where prion burden is high.
Another potential solution is to develop and support program surveillance and to work with public health organizations such the Centers for Disease Control and Prevention and the National Prion Disease Pathology Surveillance Center to elicit a surgical history in patients diagnosed with prion disease.
“Active nationwide surveillance is needed to determine the true scope of this potential problem and to develop strategies to mitigate the potential risk of iatrogenic prion transmission to future patients,” Dr. Day said.
True prevalence unknown
The authors of an invited commentary noted that, while most CJD infections occur sporadically, iatrogenic transmission is possible. Approximately 500 such cases have been reported worldwide to date.
“Yet, reported transmission from surgical procedures remains rare, with fewer than 10 confirmed CJD cases described in the literature, although the true prevalence is difficult to quantify as confirmed diagnosis requires autopsy,” wrote Beatrice Sun, MD, and Joseph Forrester, MD, with the department of surgery, Stanford (Calif.) University.
They noted that, over a 15-year period, 19 suspected iatrogenic CJD exposures were reported to the CDC – two from ophthalmology procedures, and 17 from neurosurgical procedures.
In all 19 cases, the diagnosis of CJD was unknown before the intervention, and all surgical instruments underwent normal decontamination protocols, which are inadequate to eradicate prion disease.
For patients with suspected or confirmed CJD, the World Health Organization has published infection control guidelines to prevent transmission of spongiform encephalopathies.
The guidelines recommend proper communication with all staff involved in the surgical procedure and the sterilization of supplies to be aware of potential exposure; minimizing the number of staff in the operating room; using single-use equipment whenever possible and disposing of it by incineration; using protective coverings for all nondisposable equipment; and scheduling such procedures at the end of the day to allow adequate time for decontamination.
Funding for the study was provided by the National Institutes of Health. Dr. Day owns stock in ANI Pharmaceuticals; serves as a consultant for Parabon Nanolabs, as a topic editor (dementia) for DynaMed, and as the clinical director of the Anti-NMDA Receptor Encephalitis Foundation (uncompensated). Dr. Forrester reported receiving unrestricted research funding from Varian and has received grant funding from the Surgical Infections Society.
A version of this article first appeared on Medscape.com.
About one in six patients with Creutzfeldt-Jakob disease (CJD) undergo surgery, raising the risk of iatrogenic transmission of this rare but universally fatal prion disease.
In a retrospective analysis, researchers found that 26 of 121 (21%) patients with probable or definite CJD at four U.S. academic medical centers underwent a total of 55 procedures.
These included high-risk procedures for two patients with neuropathologically proven CJD. One underwent ophthalmic artery aneurysm clipping for unruptured aneurysm, and the other underwent diagnostic brain biopsy.
“The findings were definitely surprising to me and my team – particularly the high frequency with which patients with an irreversible and particularly transmissible neurologic disease underwent invasive medical procedures either just before or shortly after the emergence of symptoms later attributed to CJD,” study investigator Gregory Day, MD, with the Mayo Clinic, Jacksonville, Fla., said in an interview.
The study was published online March 9, 2022, in JAMA Network Open.
Poor infection control
The investigators noted that the majority of CJD cases are sporadic or are inherited, but research shows that prion transmission can occur via contaminated tissues or reusable medical equipment.
While the risk of iatrogenic transmission is highest following procedures involving the central nervous system, where prion burden is highest, experimental models suggest CJD transmission can occur after contact with other tissues, including nasal mucosa, lung, lymph nodes, and spleen, the researchers noted.
“If these models are accurate, surgical procedures involving these tissues may pose a risk to patients,” the investigators wrote.
To determine the potential scope of this problem, the researchers examined the frequency of invasive procedures performed in patients with CJD at four tertiary care centers.
“In several cases, these procedures were done with clear indications [such as] fixation or joint replacement following a fracture. In several others, however, the procedures were unlikely to help the patient. For instance, a hip replacement for walking difficulties that were actually due to changes in the brain due to CJD,” Dr. Day said.
“Even more surprising was the low frequency with which appropriate surgical precautions/infection control procedures were used in patients with established diagnoses of CJD,” he noted.
Only one procedure was performed with sterilization techniques adequate to prevent CJD.
Dr. Day said the findings aren’t necessarily cause for immediate alarm, but they do highlight an area for potential improvement, including better screening of patients who have new and unexplained symptoms before proceeding with surgery, especially surgery of the central nervous system, where prion burden is high.
Another potential solution is to develop and support program surveillance and to work with public health organizations such the Centers for Disease Control and Prevention and the National Prion Disease Pathology Surveillance Center to elicit a surgical history in patients diagnosed with prion disease.
“Active nationwide surveillance is needed to determine the true scope of this potential problem and to develop strategies to mitigate the potential risk of iatrogenic prion transmission to future patients,” Dr. Day said.
True prevalence unknown
The authors of an invited commentary noted that, while most CJD infections occur sporadically, iatrogenic transmission is possible. Approximately 500 such cases have been reported worldwide to date.
“Yet, reported transmission from surgical procedures remains rare, with fewer than 10 confirmed CJD cases described in the literature, although the true prevalence is difficult to quantify as confirmed diagnosis requires autopsy,” wrote Beatrice Sun, MD, and Joseph Forrester, MD, with the department of surgery, Stanford (Calif.) University.
They noted that, over a 15-year period, 19 suspected iatrogenic CJD exposures were reported to the CDC – two from ophthalmology procedures, and 17 from neurosurgical procedures.
In all 19 cases, the diagnosis of CJD was unknown before the intervention, and all surgical instruments underwent normal decontamination protocols, which are inadequate to eradicate prion disease.
For patients with suspected or confirmed CJD, the World Health Organization has published infection control guidelines to prevent transmission of spongiform encephalopathies.
The guidelines recommend proper communication with all staff involved in the surgical procedure and the sterilization of supplies to be aware of potential exposure; minimizing the number of staff in the operating room; using single-use equipment whenever possible and disposing of it by incineration; using protective coverings for all nondisposable equipment; and scheduling such procedures at the end of the day to allow adequate time for decontamination.
Funding for the study was provided by the National Institutes of Health. Dr. Day owns stock in ANI Pharmaceuticals; serves as a consultant for Parabon Nanolabs, as a topic editor (dementia) for DynaMed, and as the clinical director of the Anti-NMDA Receptor Encephalitis Foundation (uncompensated). Dr. Forrester reported receiving unrestricted research funding from Varian and has received grant funding from the Surgical Infections Society.
A version of this article first appeared on Medscape.com.
FROM JAMA NETWORK OPEN
Novel isotretinoin ointment for congenital ichthyosis shows promise
BOSTON – , results from a phase 2b study demonstrated.
“Patients with these deficiencies have generally had very limited treatment options, including lifelong use of emollients and keratolytics, and in severe cases, systemic retinoids,” Christopher G. Bunick, MD, PhD, associate professor of dermatology at Yale University, New Haven, Conn., said at a late-breaking abstract session at the annual meeting of the American Academy of Dermatology. “There is currently no [Food and Drug Administration]-approved drug for CI. So, imagine your patients and their parents, and the frustration they must feel.”
In a study known as CONTROL, he and his colleagues evaluated the effect of TMB-001 on two subtypes of congenital ichthyosis: X-linked recessive ichthyosis (XLRI) and autosomal recessive congenital ichthyosis–lamellar ichthyosis (ARCI-LI). Of the two, the most common is XLRI, which has an estimated incidence of 1:3,000 and is caused by a deficiency of steroid sulfatase, resulting in cholesterol sulfate accumulation in the stratum corneum, retained corneodesmosomes, and reduced corneocyte desquamation, Dr. Bunick said.
ARCI-LI is rarer, with a prevalence of 1:100,000, and has been linked to mutations in six genes, most commonly TGM1, resulting in enzyme inactivation and deficient cross-linking of cornified cell envelope proteins.
TMB-001 is a proprietary, novel, topical isotretinoin formulation to treat CI that is being developed by Timber Pharmaceuticals. It uses a patented “IPEG” technology isotretinoin delivery system designed specifically for patients with CI. In a prior phase 2a study, TMB-001 0.1% and 0.2% ointment twice a day demonstrated greater improvement in ≥ 1 and ≥ 2 Investigator Global Assessment (IGA) scores compared with vehicle. Scaling in all patients treated with TMB-001 was considered clear, almost clear, or mild at 8 weeks, and no concerning safety signals were observed.
For the current trial, 33 patients with genetically confirmed XLRI/ARCI-LI and ≥ 2 (out of 4) Visual Index for Ichthyosis Severity (VIIS) assessment areas with a ≥ 3 scaling score were randomized 1:1:1 to TMB-001 0.05%, TMB-001 0.1%, or vehicle twice daily for 12 weeks. Primary and secondary efficacy endpoints were reduction of ≥ 50% compared with baseline in VIIS-scaling (VIIS-50) and a ≥ 2-grade reduction in the Investigator Global Assessment (IGA)–scaling score compared with baseline. The patients ranged in age from 9 to 80 years, the majority were White, and their baseline body surface area (BSA) affected ranged from 28% to 38%.
Of the 33 patients, 11 patients received TMB-001 0.05%, 10 received TMB-001 0.1%, and 12 received the vehicle.
Among all patients, 55% had ARCI-LI and 45% had XLRI subtypes, and those with ARCI-LI had greater prior use of corticosteroid, emollient, and oral/topical retinoids. Overall, 100%, 50%, and 75% of patients with XLRI and 100%, 33%, and 17% of patients with ARCI-LI achieved VIIS-50 after receiving TMB-001 0.05%, TMB-001 0.1%, and vehicle, respectively.
An improvement of a ≥ 2-grade IGA score was observed in 100%, 50%, and 25% of patients with XLRI and 100%, 67%, and none of patients with ARCI-LI who received TMB-001 0.05%, TMB-001 0.1%, and vehicle, respectively.
Dr. Bunick reported that there were no serious adverse events, no hospitalizations, and no patient deaths. Six patients discontinued treatment, five because of participant withdrawal and one because of physician withdrawal. The four most common treatment-emergent adverse events were erythema (21%), pruritus (21%), pain (15%) and dermatitis (12%).
“These results support ongoing investigation of TMB-001 as a promising alternative to systemic retinoids for participants with CI,” Dr. Bunick concluded. He noted that while he is not privy to details of TMB-001’s IPEG delivery system, “the way they have used polyethylene glycol to encapsulate the isotretinoin allows for greater barrier penetration and reduces a lot of the tolerability issues that are seen with other topical retinoids.” In his view, “that is providing this retinoid a greater chance of success. The patented delivery system is not only designed to help the isotretinoin do its job, but also to provide that stability and the ability to compound it, which have been barriers to success in the past.”
Phase 3 trials of the agent are scheduled to begin in June of 2022.
Amy S. Paller, MD, professor and chair of the department of dermatology at Northwestern University, Chicago, who was asked to comment on the study, said that she was impressed that no significant changes from baseline laboratory clinical assessments were observed. “If that’s true, then we don’t have to be monitoring these patients in the same way as with systemic agents,” said Dr. Paller, who was involved in the phase 2a proof-of-concept trial of TMB-001. “I think that deserves more investigation. Hopefully that will be looked at in the phase 3 trial.”
Dr. Bunick reported having no disclosures related to his presentation. Dr. Paller disclosed that she is consultant to and/or an investigator for numerous pharmaceutical companies.
*A change correcting the age range of the patients in the study was made on 3/29/22.
BOSTON – , results from a phase 2b study demonstrated.
“Patients with these deficiencies have generally had very limited treatment options, including lifelong use of emollients and keratolytics, and in severe cases, systemic retinoids,” Christopher G. Bunick, MD, PhD, associate professor of dermatology at Yale University, New Haven, Conn., said at a late-breaking abstract session at the annual meeting of the American Academy of Dermatology. “There is currently no [Food and Drug Administration]-approved drug for CI. So, imagine your patients and their parents, and the frustration they must feel.”
In a study known as CONTROL, he and his colleagues evaluated the effect of TMB-001 on two subtypes of congenital ichthyosis: X-linked recessive ichthyosis (XLRI) and autosomal recessive congenital ichthyosis–lamellar ichthyosis (ARCI-LI). Of the two, the most common is XLRI, which has an estimated incidence of 1:3,000 and is caused by a deficiency of steroid sulfatase, resulting in cholesterol sulfate accumulation in the stratum corneum, retained corneodesmosomes, and reduced corneocyte desquamation, Dr. Bunick said.
ARCI-LI is rarer, with a prevalence of 1:100,000, and has been linked to mutations in six genes, most commonly TGM1, resulting in enzyme inactivation and deficient cross-linking of cornified cell envelope proteins.
TMB-001 is a proprietary, novel, topical isotretinoin formulation to treat CI that is being developed by Timber Pharmaceuticals. It uses a patented “IPEG” technology isotretinoin delivery system designed specifically for patients with CI. In a prior phase 2a study, TMB-001 0.1% and 0.2% ointment twice a day demonstrated greater improvement in ≥ 1 and ≥ 2 Investigator Global Assessment (IGA) scores compared with vehicle. Scaling in all patients treated with TMB-001 was considered clear, almost clear, or mild at 8 weeks, and no concerning safety signals were observed.
For the current trial, 33 patients with genetically confirmed XLRI/ARCI-LI and ≥ 2 (out of 4) Visual Index for Ichthyosis Severity (VIIS) assessment areas with a ≥ 3 scaling score were randomized 1:1:1 to TMB-001 0.05%, TMB-001 0.1%, or vehicle twice daily for 12 weeks. Primary and secondary efficacy endpoints were reduction of ≥ 50% compared with baseline in VIIS-scaling (VIIS-50) and a ≥ 2-grade reduction in the Investigator Global Assessment (IGA)–scaling score compared with baseline. The patients ranged in age from 9 to 80 years, the majority were White, and their baseline body surface area (BSA) affected ranged from 28% to 38%.
Of the 33 patients, 11 patients received TMB-001 0.05%, 10 received TMB-001 0.1%, and 12 received the vehicle.
Among all patients, 55% had ARCI-LI and 45% had XLRI subtypes, and those with ARCI-LI had greater prior use of corticosteroid, emollient, and oral/topical retinoids. Overall, 100%, 50%, and 75% of patients with XLRI and 100%, 33%, and 17% of patients with ARCI-LI achieved VIIS-50 after receiving TMB-001 0.05%, TMB-001 0.1%, and vehicle, respectively.
An improvement of a ≥ 2-grade IGA score was observed in 100%, 50%, and 25% of patients with XLRI and 100%, 67%, and none of patients with ARCI-LI who received TMB-001 0.05%, TMB-001 0.1%, and vehicle, respectively.
Dr. Bunick reported that there were no serious adverse events, no hospitalizations, and no patient deaths. Six patients discontinued treatment, five because of participant withdrawal and one because of physician withdrawal. The four most common treatment-emergent adverse events were erythema (21%), pruritus (21%), pain (15%) and dermatitis (12%).
“These results support ongoing investigation of TMB-001 as a promising alternative to systemic retinoids for participants with CI,” Dr. Bunick concluded. He noted that while he is not privy to details of TMB-001’s IPEG delivery system, “the way they have used polyethylene glycol to encapsulate the isotretinoin allows for greater barrier penetration and reduces a lot of the tolerability issues that are seen with other topical retinoids.” In his view, “that is providing this retinoid a greater chance of success. The patented delivery system is not only designed to help the isotretinoin do its job, but also to provide that stability and the ability to compound it, which have been barriers to success in the past.”
Phase 3 trials of the agent are scheduled to begin in June of 2022.
Amy S. Paller, MD, professor and chair of the department of dermatology at Northwestern University, Chicago, who was asked to comment on the study, said that she was impressed that no significant changes from baseline laboratory clinical assessments were observed. “If that’s true, then we don’t have to be monitoring these patients in the same way as with systemic agents,” said Dr. Paller, who was involved in the phase 2a proof-of-concept trial of TMB-001. “I think that deserves more investigation. Hopefully that will be looked at in the phase 3 trial.”
Dr. Bunick reported having no disclosures related to his presentation. Dr. Paller disclosed that she is consultant to and/or an investigator for numerous pharmaceutical companies.
*A change correcting the age range of the patients in the study was made on 3/29/22.
BOSTON – , results from a phase 2b study demonstrated.
“Patients with these deficiencies have generally had very limited treatment options, including lifelong use of emollients and keratolytics, and in severe cases, systemic retinoids,” Christopher G. Bunick, MD, PhD, associate professor of dermatology at Yale University, New Haven, Conn., said at a late-breaking abstract session at the annual meeting of the American Academy of Dermatology. “There is currently no [Food and Drug Administration]-approved drug for CI. So, imagine your patients and their parents, and the frustration they must feel.”
In a study known as CONTROL, he and his colleagues evaluated the effect of TMB-001 on two subtypes of congenital ichthyosis: X-linked recessive ichthyosis (XLRI) and autosomal recessive congenital ichthyosis–lamellar ichthyosis (ARCI-LI). Of the two, the most common is XLRI, which has an estimated incidence of 1:3,000 and is caused by a deficiency of steroid sulfatase, resulting in cholesterol sulfate accumulation in the stratum corneum, retained corneodesmosomes, and reduced corneocyte desquamation, Dr. Bunick said.
ARCI-LI is rarer, with a prevalence of 1:100,000, and has been linked to mutations in six genes, most commonly TGM1, resulting in enzyme inactivation and deficient cross-linking of cornified cell envelope proteins.
TMB-001 is a proprietary, novel, topical isotretinoin formulation to treat CI that is being developed by Timber Pharmaceuticals. It uses a patented “IPEG” technology isotretinoin delivery system designed specifically for patients with CI. In a prior phase 2a study, TMB-001 0.1% and 0.2% ointment twice a day demonstrated greater improvement in ≥ 1 and ≥ 2 Investigator Global Assessment (IGA) scores compared with vehicle. Scaling in all patients treated with TMB-001 was considered clear, almost clear, or mild at 8 weeks, and no concerning safety signals were observed.
For the current trial, 33 patients with genetically confirmed XLRI/ARCI-LI and ≥ 2 (out of 4) Visual Index for Ichthyosis Severity (VIIS) assessment areas with a ≥ 3 scaling score were randomized 1:1:1 to TMB-001 0.05%, TMB-001 0.1%, or vehicle twice daily for 12 weeks. Primary and secondary efficacy endpoints were reduction of ≥ 50% compared with baseline in VIIS-scaling (VIIS-50) and a ≥ 2-grade reduction in the Investigator Global Assessment (IGA)–scaling score compared with baseline. The patients ranged in age from 9 to 80 years, the majority were White, and their baseline body surface area (BSA) affected ranged from 28% to 38%.
Of the 33 patients, 11 patients received TMB-001 0.05%, 10 received TMB-001 0.1%, and 12 received the vehicle.
Among all patients, 55% had ARCI-LI and 45% had XLRI subtypes, and those with ARCI-LI had greater prior use of corticosteroid, emollient, and oral/topical retinoids. Overall, 100%, 50%, and 75% of patients with XLRI and 100%, 33%, and 17% of patients with ARCI-LI achieved VIIS-50 after receiving TMB-001 0.05%, TMB-001 0.1%, and vehicle, respectively.
An improvement of a ≥ 2-grade IGA score was observed in 100%, 50%, and 25% of patients with XLRI and 100%, 67%, and none of patients with ARCI-LI who received TMB-001 0.05%, TMB-001 0.1%, and vehicle, respectively.
Dr. Bunick reported that there were no serious adverse events, no hospitalizations, and no patient deaths. Six patients discontinued treatment, five because of participant withdrawal and one because of physician withdrawal. The four most common treatment-emergent adverse events were erythema (21%), pruritus (21%), pain (15%) and dermatitis (12%).
“These results support ongoing investigation of TMB-001 as a promising alternative to systemic retinoids for participants with CI,” Dr. Bunick concluded. He noted that while he is not privy to details of TMB-001’s IPEG delivery system, “the way they have used polyethylene glycol to encapsulate the isotretinoin allows for greater barrier penetration and reduces a lot of the tolerability issues that are seen with other topical retinoids.” In his view, “that is providing this retinoid a greater chance of success. The patented delivery system is not only designed to help the isotretinoin do its job, but also to provide that stability and the ability to compound it, which have been barriers to success in the past.”
Phase 3 trials of the agent are scheduled to begin in June of 2022.
Amy S. Paller, MD, professor and chair of the department of dermatology at Northwestern University, Chicago, who was asked to comment on the study, said that she was impressed that no significant changes from baseline laboratory clinical assessments were observed. “If that’s true, then we don’t have to be monitoring these patients in the same way as with systemic agents,” said Dr. Paller, who was involved in the phase 2a proof-of-concept trial of TMB-001. “I think that deserves more investigation. Hopefully that will be looked at in the phase 3 trial.”
Dr. Bunick reported having no disclosures related to his presentation. Dr. Paller disclosed that she is consultant to and/or an investigator for numerous pharmaceutical companies.
*A change correcting the age range of the patients in the study was made on 3/29/22.
AT AAD 2022
Brain implant allows fully paralyzed patient to communicate
Using a commercially available implant and newly designed software, the patient, who was in the advanced stages of Lou Gehrig’s disease and unable to move his eyes, was able to interact with researchers and caregivers, requesting goulash, beer, and music from the band Tool, thanking the researchers who developed the technology and inviting his 4-year-old son to watch a Disney film.
The investigators note the study shows for the first time that communication is possible in patients in a completely locked-in state (CLIS) and offers hope for a better quality of life in this population.
“It should encourage them to live after artificial respiration and to ask for brain-computer interfaces before they become CLIS,” study investigator Niels Birbaumer, PhD, a professor emeritus of the University of Tübingen, Germany, said in an interview. The study was published online March 22 in Nature Communications.
Although the findings appear promising, they build on previous research that was the subject of a 2019 investigation by the largest grant-funding agency in Germany. This controversy prompted the institute that led the current research to appoint an independent expert to audit and monitor the new study.
Mechanism a ‘mystery’
Use of brain-computer interface (BCI) technology to allow ALS patients to communicate has increased in recent years. BCIs capture brain signals, transmit them to a computer, and convert them into a command that the computer carries out.
Previous research shows patients with ALS who retain eye movement and control have been able to use BCIs to communicate. However, until now, the technology has not worked as well in CLIS patients, who have full-body paralysis.
In 2019, German and Swiss researchers implanted two 64-microde arrays in the brain of a 34-year-old patient who was diagnosed with ALS in 2015.
The electrodes measure neuronal activity while an amplifier located on the outside of the patient’s skull amplifies the signals to a computer. Software created by the research team decodes the signals and translates them into commands.
Using an auditory feedback system, the patient was able to use his mind to modulate the pitch of a tone to either high (meaning “yes”) or low (meaning “no.”) Just how the brain does this is a mystery, Dr. Birbaumer said.
A speller program reads letters aloud, first in groups and then individually. When a group contained letters the patient needed to spell a word, he used auditory feedback to select the high-pitch tone.
Initially, the patient was able to correctly spell his name. Ultimately, he was able to form complete sentences. The patient correctly spelled words on 44 of the 107 days in that phase of the experiment, spelling an average of just one character per minute.
Still, the researchers note he was able to interact with his caretakers, family, and researchers, even offering input on changes to make the device more effective.
Controversial history
In 2017, Dr. Birbaumer and Ujwal Chaudhary, PhD, who is the lead author on this current study, published a study in PLOS Biology. That research analyzed a brain-monitoring technique that the scientists claimed enabled patients with ALS who were completely locked in to answer yes or no questions correctly.
Allegations from a whistleblower at the University of Tübingen, where Dr. Birbaumer was a senior professor and Dr. Chaudhary was a postdoctoral researcher, prompted an investigation by the Deutsche Forschungsgemeinschaft, or German Research Foundation (DFG).
The whistleblower claimed that the 2017 paper and a second study published in 2019 contained incomplete data and misrepresented the findings. The DFG investigation found evidence of scientific misconduct and required that Dr. Birbaumer return the grant he had received for the research. The agency also banned Dr. Birbaumer from applying for grants or serving as a grant reviewer for 5 years. Dr. Chaudhary was banned for 3 years. PLOS Biology later retracted the papers.
Both researchers have refuted the allegations and have reportedly sued the German Research Foundation.
“We have no information about the status of our lawsuit against the DFG; it’s still pending,” Dr. Birbaumer told this news organization. “I hope they investigate our present study because the study of 2017 they did not investigate carefully enough.”
Results ‘not stunningly good’
The controversial history prompted the Wyss Center, Geneva, which led this new study, to seek out at an independent BCI expert to audit and monitor the study.
Nick Ramsey, PhD, a professor of cognitive neuroscience at the Brain Center of the University Medical Center Utrecht, the Netherlands, agreed to take on the assignment in March 2020.
Dr. Ramsey has also conducted research on BCI in patients with ALS, but his work has not included patients in CLIS.
“I judged the study to be compliant with universal standards of scientific integrity,” Dr. Ramsey told this news organization. “I am confident that the data and results presented in the paper are valid and will withstand academic and medical scrutiny.”
Commenting on the new findings, Dr. Ramsey noted that the results of the study are “not stunningly good, as the user could only communicate during a limited number of days, and even then with considerable slowness,” Dr. Ramsey said. However, he added that the study does provide proof of principle that communication is possible in CLIS patients.
“The question remains whether a BCI implant continues to work well in these patients, as there are some indications that people in such a state may lose their mental capabilities within months or a few years as a result of the disease and can thus no longer generate a wish to communicate,” Dr. Ramsey said.
Responding to a query from this news organization, a spokesperson for Nature Communications declined to comment on the new study but said that journal editors are “are alert to controversies within each field and take care when considering submissions during the peer-review process.”
“We have rigorous policies to safeguard the integrity of the research we publish,” the spokesperson continued, “including to ensure that research has been conducted to a high ethical standard and is reported transparently.”
The research was funded by Wyss Center for Bio and Neuroengineering, Geneva and Deutsche Forschungsgemeinschaft. The authors have disclosed no relevant financial relationships. Dr. Ramsey received payment from the Wyss Center for his advisory role in this project.
A version of this article first appeared on Medscape.com.
Using a commercially available implant and newly designed software, the patient, who was in the advanced stages of Lou Gehrig’s disease and unable to move his eyes, was able to interact with researchers and caregivers, requesting goulash, beer, and music from the band Tool, thanking the researchers who developed the technology and inviting his 4-year-old son to watch a Disney film.
The investigators note the study shows for the first time that communication is possible in patients in a completely locked-in state (CLIS) and offers hope for a better quality of life in this population.
“It should encourage them to live after artificial respiration and to ask for brain-computer interfaces before they become CLIS,” study investigator Niels Birbaumer, PhD, a professor emeritus of the University of Tübingen, Germany, said in an interview. The study was published online March 22 in Nature Communications.
Although the findings appear promising, they build on previous research that was the subject of a 2019 investigation by the largest grant-funding agency in Germany. This controversy prompted the institute that led the current research to appoint an independent expert to audit and monitor the new study.
Mechanism a ‘mystery’
Use of brain-computer interface (BCI) technology to allow ALS patients to communicate has increased in recent years. BCIs capture brain signals, transmit them to a computer, and convert them into a command that the computer carries out.
Previous research shows patients with ALS who retain eye movement and control have been able to use BCIs to communicate. However, until now, the technology has not worked as well in CLIS patients, who have full-body paralysis.
In 2019, German and Swiss researchers implanted two 64-microde arrays in the brain of a 34-year-old patient who was diagnosed with ALS in 2015.
The electrodes measure neuronal activity while an amplifier located on the outside of the patient’s skull amplifies the signals to a computer. Software created by the research team decodes the signals and translates them into commands.
Using an auditory feedback system, the patient was able to use his mind to modulate the pitch of a tone to either high (meaning “yes”) or low (meaning “no.”) Just how the brain does this is a mystery, Dr. Birbaumer said.
A speller program reads letters aloud, first in groups and then individually. When a group contained letters the patient needed to spell a word, he used auditory feedback to select the high-pitch tone.
Initially, the patient was able to correctly spell his name. Ultimately, he was able to form complete sentences. The patient correctly spelled words on 44 of the 107 days in that phase of the experiment, spelling an average of just one character per minute.
Still, the researchers note he was able to interact with his caretakers, family, and researchers, even offering input on changes to make the device more effective.
Controversial history
In 2017, Dr. Birbaumer and Ujwal Chaudhary, PhD, who is the lead author on this current study, published a study in PLOS Biology. That research analyzed a brain-monitoring technique that the scientists claimed enabled patients with ALS who were completely locked in to answer yes or no questions correctly.
Allegations from a whistleblower at the University of Tübingen, where Dr. Birbaumer was a senior professor and Dr. Chaudhary was a postdoctoral researcher, prompted an investigation by the Deutsche Forschungsgemeinschaft, or German Research Foundation (DFG).
The whistleblower claimed that the 2017 paper and a second study published in 2019 contained incomplete data and misrepresented the findings. The DFG investigation found evidence of scientific misconduct and required that Dr. Birbaumer return the grant he had received for the research. The agency also banned Dr. Birbaumer from applying for grants or serving as a grant reviewer for 5 years. Dr. Chaudhary was banned for 3 years. PLOS Biology later retracted the papers.
Both researchers have refuted the allegations and have reportedly sued the German Research Foundation.
“We have no information about the status of our lawsuit against the DFG; it’s still pending,” Dr. Birbaumer told this news organization. “I hope they investigate our present study because the study of 2017 they did not investigate carefully enough.”
Results ‘not stunningly good’
The controversial history prompted the Wyss Center, Geneva, which led this new study, to seek out at an independent BCI expert to audit and monitor the study.
Nick Ramsey, PhD, a professor of cognitive neuroscience at the Brain Center of the University Medical Center Utrecht, the Netherlands, agreed to take on the assignment in March 2020.
Dr. Ramsey has also conducted research on BCI in patients with ALS, but his work has not included patients in CLIS.
“I judged the study to be compliant with universal standards of scientific integrity,” Dr. Ramsey told this news organization. “I am confident that the data and results presented in the paper are valid and will withstand academic and medical scrutiny.”
Commenting on the new findings, Dr. Ramsey noted that the results of the study are “not stunningly good, as the user could only communicate during a limited number of days, and even then with considerable slowness,” Dr. Ramsey said. However, he added that the study does provide proof of principle that communication is possible in CLIS patients.
“The question remains whether a BCI implant continues to work well in these patients, as there are some indications that people in such a state may lose their mental capabilities within months or a few years as a result of the disease and can thus no longer generate a wish to communicate,” Dr. Ramsey said.
Responding to a query from this news organization, a spokesperson for Nature Communications declined to comment on the new study but said that journal editors are “are alert to controversies within each field and take care when considering submissions during the peer-review process.”
“We have rigorous policies to safeguard the integrity of the research we publish,” the spokesperson continued, “including to ensure that research has been conducted to a high ethical standard and is reported transparently.”
The research was funded by Wyss Center for Bio and Neuroengineering, Geneva and Deutsche Forschungsgemeinschaft. The authors have disclosed no relevant financial relationships. Dr. Ramsey received payment from the Wyss Center for his advisory role in this project.
A version of this article first appeared on Medscape.com.
Using a commercially available implant and newly designed software, the patient, who was in the advanced stages of Lou Gehrig’s disease and unable to move his eyes, was able to interact with researchers and caregivers, requesting goulash, beer, and music from the band Tool, thanking the researchers who developed the technology and inviting his 4-year-old son to watch a Disney film.
The investigators note the study shows for the first time that communication is possible in patients in a completely locked-in state (CLIS) and offers hope for a better quality of life in this population.
“It should encourage them to live after artificial respiration and to ask for brain-computer interfaces before they become CLIS,” study investigator Niels Birbaumer, PhD, a professor emeritus of the University of Tübingen, Germany, said in an interview. The study was published online March 22 in Nature Communications.
Although the findings appear promising, they build on previous research that was the subject of a 2019 investigation by the largest grant-funding agency in Germany. This controversy prompted the institute that led the current research to appoint an independent expert to audit and monitor the new study.
Mechanism a ‘mystery’
Use of brain-computer interface (BCI) technology to allow ALS patients to communicate has increased in recent years. BCIs capture brain signals, transmit them to a computer, and convert them into a command that the computer carries out.
Previous research shows patients with ALS who retain eye movement and control have been able to use BCIs to communicate. However, until now, the technology has not worked as well in CLIS patients, who have full-body paralysis.
In 2019, German and Swiss researchers implanted two 64-microde arrays in the brain of a 34-year-old patient who was diagnosed with ALS in 2015.
The electrodes measure neuronal activity while an amplifier located on the outside of the patient’s skull amplifies the signals to a computer. Software created by the research team decodes the signals and translates them into commands.
Using an auditory feedback system, the patient was able to use his mind to modulate the pitch of a tone to either high (meaning “yes”) or low (meaning “no.”) Just how the brain does this is a mystery, Dr. Birbaumer said.
A speller program reads letters aloud, first in groups and then individually. When a group contained letters the patient needed to spell a word, he used auditory feedback to select the high-pitch tone.
Initially, the patient was able to correctly spell his name. Ultimately, he was able to form complete sentences. The patient correctly spelled words on 44 of the 107 days in that phase of the experiment, spelling an average of just one character per minute.
Still, the researchers note he was able to interact with his caretakers, family, and researchers, even offering input on changes to make the device more effective.
Controversial history
In 2017, Dr. Birbaumer and Ujwal Chaudhary, PhD, who is the lead author on this current study, published a study in PLOS Biology. That research analyzed a brain-monitoring technique that the scientists claimed enabled patients with ALS who were completely locked in to answer yes or no questions correctly.
Allegations from a whistleblower at the University of Tübingen, where Dr. Birbaumer was a senior professor and Dr. Chaudhary was a postdoctoral researcher, prompted an investigation by the Deutsche Forschungsgemeinschaft, or German Research Foundation (DFG).
The whistleblower claimed that the 2017 paper and a second study published in 2019 contained incomplete data and misrepresented the findings. The DFG investigation found evidence of scientific misconduct and required that Dr. Birbaumer return the grant he had received for the research. The agency also banned Dr. Birbaumer from applying for grants or serving as a grant reviewer for 5 years. Dr. Chaudhary was banned for 3 years. PLOS Biology later retracted the papers.
Both researchers have refuted the allegations and have reportedly sued the German Research Foundation.
“We have no information about the status of our lawsuit against the DFG; it’s still pending,” Dr. Birbaumer told this news organization. “I hope they investigate our present study because the study of 2017 they did not investigate carefully enough.”
Results ‘not stunningly good’
The controversial history prompted the Wyss Center, Geneva, which led this new study, to seek out at an independent BCI expert to audit and monitor the study.
Nick Ramsey, PhD, a professor of cognitive neuroscience at the Brain Center of the University Medical Center Utrecht, the Netherlands, agreed to take on the assignment in March 2020.
Dr. Ramsey has also conducted research on BCI in patients with ALS, but his work has not included patients in CLIS.
“I judged the study to be compliant with universal standards of scientific integrity,” Dr. Ramsey told this news organization. “I am confident that the data and results presented in the paper are valid and will withstand academic and medical scrutiny.”
Commenting on the new findings, Dr. Ramsey noted that the results of the study are “not stunningly good, as the user could only communicate during a limited number of days, and even then with considerable slowness,” Dr. Ramsey said. However, he added that the study does provide proof of principle that communication is possible in CLIS patients.
“The question remains whether a BCI implant continues to work well in these patients, as there are some indications that people in such a state may lose their mental capabilities within months or a few years as a result of the disease and can thus no longer generate a wish to communicate,” Dr. Ramsey said.
Responding to a query from this news organization, a spokesperson for Nature Communications declined to comment on the new study but said that journal editors are “are alert to controversies within each field and take care when considering submissions during the peer-review process.”
“We have rigorous policies to safeguard the integrity of the research we publish,” the spokesperson continued, “including to ensure that research has been conducted to a high ethical standard and is reported transparently.”
The research was funded by Wyss Center for Bio and Neuroengineering, Geneva and Deutsche Forschungsgemeinschaft. The authors have disclosed no relevant financial relationships. Dr. Ramsey received payment from the Wyss Center for his advisory role in this project.
A version of this article first appeared on Medscape.com.
FROM NATURE COMMUNICATIONS