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EPILEPSY | +50 articles

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Cannabis oil for epilepsy

Epilepsy drugs don't work well, or at all, for 1/3 of people with the condition. Unfortunately, these hard-to-treat epilepsies are associated with an increased risk of premature death.

Anecdotal evidence suggests that cannabis oil may help some of these people control their seizures and potentially save their lives. A small number of studies have shown that adding cannabis oil to existing medication may be effective in devastating, hard-to-treat epilepsy in children and adolescents.

One of those people is 12-year-old Billy Caldwell. Billy was in the news recently after the cannabis oil prescribed for him was confiscated at Heathrow airport by the authorities. Billy's mother, Charlotte, was attempting to bring the cannabis oil into the UK from Canada, where cannabis oil is legal.

Billy was seizure-free for more than 250 days when taking the oil, but seizures started again when his cannabis oil was withdrawn. The home secretary, Sajid Javid, was persuaded to intervene and one of the seven bottles of cannabis oil was returned, with a 20-day licence to administer the medicine.

In a similar case, six-year-old Alfie Dingle, who suffers from severe epilepsy, had been successful treated with cannabis oil in the Netherlands. Alfie's mother, Hannah Deacon, has been campaigning to allow her son to be provided with cannabis oil in the UK.

The government has now also relented in Alfie's case following the concerns raised around the confiscation and return of Billy Caldwell's medicine.

What the evidence shows

So what do we know about cannabis oil and its effects on epileptic seizures?

The two main constituents of cannabis oil are THC and CBD. Oil containing CBD alone can be legally bought in the UK without a prescription because it contains only very low quantities of THC. But cannabis oil that contains THC at higher levels than is illegal. THC is a schedule 1 drug, that is to say, it is deemed to have no medicinal value.

The reason that Billy's cannabis oil was seized at Heathrow airport was that it didn?t just contain CBD, it also contained THC at higher levels than legally permitted.

There is evidence that CBD is of benefit for specific epilepsies, such as Dravet syndrome and Lennox Gastaut syndrome. An advantage for the pharmaceutical industry is that these rare diseases with no cure can be fast-tracked for drug development. On this basis, the US Food and Drug Administration is widely expected to grant a licence for CBD (tradename Epidiolex) to treat these epilepsies. If so, Epidiolex is likely to be available in US by late 2018. European approval is likely to follow.

It should be noted that Epidiolex is designed as standardised oral solution of pure plant-derived CBD. It is not the same as the non-standardised, viscous CBD oils that contain varying amounts of CBD and can be purchased in health food shops. There is currently no evidence that formulations of CBD oil (or indeed cannabis oil) are as effective on epilepsy seizures. Equally, there is no robust evidence - just anecdotal reports that THC helps reduce epilepsy seizures human.

In animal studies, THC has weak overall effects in reducing seizures and has also been shown to be a less effective anticonvulsant than CBD. THC, being a psychoactive substance, also has a number of side effects, including the well-known euphoric high associated with recreational use, which is a significant disincentive for the pharmaceutical industry to develop a medicine containing this compound.

We now need to decide if we should expand human trials with better defined THC-containing cannabis oil, or if we should focus on CBD. The fact that Epidiolex has progressed towards approval in the US may encourage the latter course. CBD lacks psychoactive effects associated with THC and, in general, is regarded as a safe compound.

If Epidiolex is granted regulatory approval, it will also need to be monitored in a larger number of patients, what's known as phase 4 post-marketing surveillance, to ensure that it is safe and effective in a broader population. For any cannabis-based product, only large-scale clinical trials can provide definitive answers about effectiveness and safety.

http://theconversation.com/cannabis-...-to-know-98499
 
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Scientists track down possible new treatment for epilepsy

VIB - Flanders Interuniversity Institute for Biotechnology

Increasing the concentration of specific fats in the brain could suppress epileptic seizures. This is evident from ground-breaking research carried out by the research groups of Professor Patrik Verstreken and Professor Wim Versees. The results of their close collaboration have been published in the leading trade journal Nature Structural & Molecular Biology.

Professor Patrik Verstreken specializes in brain research, focusing on synapses. These are the junctions between two nerve cells where electrical signals are transmitted. In various brain disorders -- such as Parkinson's disease -- there is impaired communication at these synapses.

Professor Wim Versees examines the processes which take place in our cells, right down to the level of individual molecules and atoms. By figuring out the three-dimensional structures of protein molecules, he tries to obtain crucial information about their role in the cell and the mechanisms which underlie various disorders.

The key role of TBC1D24

In earlier research involving fruit flies, Professor Verstreken had already demonstrated that a protein known as 'Skywalker' plays a crucial role in maintaining communication between brain cells. An almost identical protein operates in the human brain under the name 'TBC1D24'.

Professor Patrik Verstreken (VIB-KU Leuven): "Genetic mutations of the protein TBC1D24 cause a deviation known as the DOOR syndrome. Alongside deafness, deformed nails, brittle bones and mental retardation, this serious genetic disorder is characterized by neurodegeneration, movement disorders and epilepsy."

Analysis with atomic precision

By joining forces with Professor Wim Versees at the VIB research center for structural biology, the scientists were able to figure out the three-dimensional structure of Skywalker, making it possible to study the protein in microscopic detail.

Professor Wim Versees (VIB-Vrije Universiteit Brussel): "Looking at Skywalker in this way gave us completely new insights into the precise function of this protein, and therefore also the function of the human protein TBC1D24. Among other things, we discovered that it connects with specific brain fats. And more importantly, this connection is impaired in over 70% of patients with a TBC1D24 mutation."

Suppression of epileptic seizures

On the basis of this discovery, the scientists increased the concentration of specific brain fats in fruit flies with a Skywalker mutation. What happened? The epileptic seizures in the sick fruit flies were completely suppressed.

Professor Patrik Verstreken (VIB-KU Leuven): "Our work shows that increasing specific brain fats at the synapses of patients with a TBC1D24 mutation is a possible strategy for preventing epileptic seizures. And although our work focuses on people with TBC1D24 mutations, we think that our findings could be relevant to various forms of epilepsy."

Scientific cross-pollination

Professor Wim Versees (VIB-Vrije Universiteit Brussel): "Our two research groups will now continue to collaborate in order to seek out strategies for increasing the concentration of specific fats in the brain to prevent epileptic seizures. This research stems from cross-pollination between structural biology, biochemistry and genetics, so we will certainly continue down this interdisciplinary route."

https://www.sciencedaily.com/releases/2016/09/160926115113.htm
 
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Oral CBD solution Epidiolex now available for treating epilepsy

by Kristen Coppock | Nov 05, 2018

A ground-breaking cannabidiol oral solution (Epidiolex, GW Pharmaceuticals) is now available by prescription in the United States to treat seizures associated with Dravet syndrome or Lennox-Gastaut syndrome (LGS) in patients aged 2 years or older.

Approved by the FDA in June, Epidiolex is the first prescription pharmaceutical formulation of highly purified, plant-derived cannabidiol (CBD), a cannabinoid lacking the high associated with marijuana, and the first in a new category of anti-epileptic drugs.

Epidiolex provides a new treatment option for patients with 2 of the most difficult-to-treat forms of childhood-onset epilepsy, according to Justin Gover, chief executive officer of GW Pharmaceuticals.

“Because these patients have historically not responded well to available seizure medications, there has been a dire need for new therapies that aim to reduce the frequency and impact of seizures,” he said in a statement. “We are committed to ensuring that these patients can access this novel cannabinoid medicine that has been thoroughly studied in clinical trials, manufactured to assure quality and consistency, and is eligible to be covered by insurance for appropriate patients.”

In a statement to Pharmacy Times, the American Epilepsy Society (AES) voiced support for the FDA's approval of Epidiolex, as a treatment option for these 2 rare forms of epilepsy. However, the society also encouraged patients to be cautious with this new medication.

“The AES cautions that although prescription cannabidiol medication is made from the cannabis plant, it is a highly purified and carefully manufactured oral formulation and is not the same as medical marijuana, which may also contain THC (which causes a high), pesticides, and other dangerous impurities,” AES officials said in the statement. “Further, while trials have shown that pharmaceutical-grade CBD product can be effective. It is not a silver bullet, has more side effects and can interact with other epilepsy medications.”

Epidiolex’s effectiveness was studied in 3 randomized, double-blind, placebo-controlled clinical trials involving 516 patients with either Dravet syndrome or LGS. Epidiolex, taken along with other medications, was shown to be effective in reducing the frequency of seizures compared with the placebo.

The most common adverse effects that occurred in Epidiolex-treated patients in the clinical trials were sleepiness, sedation and lethargy; elevated liver enzymes; decreased appetite; diarrhea; rash; fatigue, malaise and weakness; insomnia, sleep disorder and poor quality sleep; and infections.

In launching the new drug treatment, GW Pharmaceuticals and its United States subsidiary Greenwich Biosciences have also introduced a comprehensive patient support program, Epidiolex Engage, that aims to help patients who have been prescribed Epidiolex gain access to therapy.

The program offers caregiver- and patient-focused education and resources to help lower out-of-pocket costs or provide product at no cost for eligible patients, according to the company.

In a statement, Christina San Inocencio, executive director of the Lennox-Gastaut Syndrome Foundation, said that LGS is a devastating form of epilepsy.

"Epidiolex is a much-needed new treatment option for patients with LGS, a severe form of childhood-onset epilepsy that typically persists into adulthood,” she said in a statement. “Despite the use of multiple epilepsy treatments, the majority of LGS patients continue to have life-long, debilitating seizures, and our community welcomes the availability of a new, first-in-class treatment option.”

Mary Anne Meskis, executive director of the Dravet Syndrome Foundation, also expressed support for the new treatment in prepared statements.

“While each disorder is different in terms of etiology, both of our communities suffer from intractable seizures, an increased risk of mortality, and many devastating co-morbid conditions that significantly affect quality of life,” she said.

"The Dravet syndrome community has long desired a medication specifically approved for the treatment of seizures associated with the condition," Meskis said.

"The availability of Epidiolex is an important milestone for patients and caregivers whose lives are significantly impacted by this catastrophic, lifelong form of epilepsy,” she said.

https://www.pharmacytimes.com/news/...eating-2-rare-forms-of-epilepsy-now-available
 
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VNS Therapy

A personalized, comprehensive approach to seizure control.

VNS Therapy has the ability to not only prevent seizures before they start but stop them if they do.

VNS Therapy is delivered through a device that sends mild pulses to the vagus nerve at regular intervals throughout the day in an effort to prevent seizures.

An additional dose of therapy may stop or shorten your seizure, decrease its intensity and improve your recovery.

VNS Therapy includes a short outpatient procedure which takes about an hour.

3 modes of VNS Therapy

1. Standard Mode - Prevention Delivery

Therapy is delivered at regular intervals all day, every day in an effort to prevent seizures.

2. Detect & Respond - Responsive Delivery

Automatic delivery of an extra dose of therapy activated when an increase in heart rate is detected, which may be associated with seizures. This may stop or shorten a seizure.

3. Magnet Mode - On-Demand Delivery

VNS provides you or a caregiver the ability to manually deliver an additional dose of therapy in an effort to stop or shorten a seizure once it starts.

An extra dose of therapy may stop or shorten a seizure

An extra dose of therapy may be administered using the VNS Therapy magnet or via Detect & Respond Mode.

Day/night programming

Optional feature that allows your doctor to customize VNS Theapy based on your lifestyle preferences or side effect management. Your doctor can program your device to different settings for any two periods of time during a 24-hour period.

Scheduled programming

Scheduled Programming allows your doctor to pre-program your device to automatically change therapy settings at certain intervals to quickly reach the targeted dose. This option can reduce the need for patients to attend follow up appointments for programming.

https://us.livanova.cyberonics.com/home
 
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Ketamine found to induce seizures

J Khandrani, A Rajput, S Dahake, N Verma

A 10-year-old boy admitted for a tonsillectomy with no past history of convulsions was administered Ketamine 100mg pre-operatively, and in less than 5 minutes developed generalized tonic and clonic seizures. Ketamine has been implicated as having proconvulsant as well as anti-convulsant activity. Our experience prompted us to believe that ketamine may not be a safe drug as premedication outside Operation theatre and an alternative anesthetic drug may be considered.

Case report

A 10 year old boy weighing 25kg with chronic tonsillitis was posted for tonsillectomy under general anesthesia. Patient was NBM since 6 hours with no significant finding in pre-anesthetic check-up including no past history of convulsions to him or any other of his family members. Patient was not given any pre-operative antibiotics since 7 days. Ketamine 100mg was given in preoperatively. On reaching Operating room, patient developed hypertonia of all 4 limbs. Immediately Oxygen supplementation with face mask was done and 20G IV line secured and sample collected for stat bedside hemogluco test showing glucose level as 88mg%. Patient developed generalized tonic clonic seizures. A detailed clinical and laboratory neurological evaluation performed on the day after the event did not reveal any abnormality. Patient's parents were counseled about the event.

Conclusion

IV and/or IM ketamine may cause seizure activity either in the form of cortical electroencephalograph (ECG) or clinical seizure activity in epileptics in whom the drug activates subcortical activity. In management of such cases, initial drugs recommended are Benzodiazepines (both short and long acting) which are also routinely administered along with Ketamine to reduce hallucinations. Here midazolam was not used to restrict the drug volume for IM administration; although that was the first drug used after IV access.

Therefore, with this case report, we suggest the need for caution while administering Ketamine as premedication, even in healthy individuals.

http://ispub.com/IJA/19/1/11843
 
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Cambridge

EEG helps predict epileptic seizures minutes in advance

Neuroscience News | Feb 20, 2019

Researchers report EEG technology can help to predict the onset of epileptic seizures up to four minutes in advance. Additionally, acetate, an edible acid, may help to prevent seizures if they are detected with enough notice.

Elizabeth Delacruz can’t crawl or toddle around like most youngsters nearing their second birthday.

A rare metabolic disorder that decimated her mobility has also led to cortical blindness – her brain is unable to process images received from an otherwise healthy set of brown eyes. And multiple times a day Elizabeth suffers seizures that continually reduce her brain function. She can only offer an occasional smile or make soft bubbly sounds to communicate her mood.

“But a few months ago I heard her say, ‘Mama,’ and I started to cry,” said Carmen Mejia, a subtle quaver in her voice as she recalled the joy of hearing her daughter. “That’s the first time she said something.”

Ms. Mejia realizes it may also be the last, unless doctors can find a way to detect and prevent the epileptic seizures stemming from a terminal disease called pyruvate dehydrogenase deficiency (PDHD) – which occurs when mitochondria don’t provide enough energy for the cells.

A UT Southwestern study gives parents like Ms. Mejia renewed hope for their children: By monitoring the brain activity of a specific cell type responsible for seizures, scientists can predict convulsions at least four minutes in advance in both humans and mice. The research further shows that an edible acid called acetate may effectively prevent seizures if they are detected with enough notice.

Although the prediction strategy cannot yet be used clinically – a mobile technology for measuring brain activity would have to be developed – it signifies a potential breakthrough in a field that had only been able to forecast seizures a few seconds ahead.

“Many of the families I meet with are not just bothered by the seizures. The problem is the unpredictability, the not knowing when and where a seizure might occur,” said Dr. Juan Pascual, a pediatric neurologist with UT Southwestern’s O’Donnell Brain Institute who led the study published in Science Translational Medicine. “We’ve found a new approach that may one day solve this issue and hopefully help other scientists track down the root of seizures for many kinds of epilepsy.”

Debunked theory

The critical difference between the study and previous efforts was debunking the long-held belief among researchers that most cells in epilepsy patients have malfunctioning mitochondria.

In fact, Dr. Pascual’s team spent a decade developing a PDHD mouse model that enabled them to first discover the key metabolic defect in the brain and then determine only a single neuron type was responsible for seizures as the result of the metabolic defect. They honed in on these neurons’ electrical activity with an electroencephalogram (EEG) to detect which brainwave readings signaled an upcoming seizure.

“It’s much more difficult to predict seizures if you don’t know the cell type and what its activity looks like on the EEG,” Dr. Pascual said. “Until this finding, we thought it was a global deficiency in the cells and so we didn’t even know to look for a specific type.”

Predicting seizures

The study shows how a PDHD mouse model helped scientists trace the seizures to inhibitory neurons near the cortex that normally keep the brain’s electrical activity in check.

Scientists then tested a method of calculating when seizures would occur in mice and humans by reviewing EEG files and looking for decreased activity in energy-deficient neurons.
Their calculations enabled them to forecast 98 percent of the convulsions at least four minutes in advance.

Dr. Pascual is hopeful his lab can refine EEG analyses to extend the warning window by several more minutes. Even then, live, clinical predictions won’t be feasible unless scientists develop technology to automatically interpret the brain activity and calculate when a seizure is imminent.

Still, he said, the discovery that a single cell type can be used to forecast seizures is a paradigm-shifting finding that may apply to all mitochondrial diseases and related epilepsies.

Potential therapy

Dr. Pascual’s ongoing efforts to extend the prediction time may be a crucial step in utilizing the other intriguing finding from the study: the use of acetate to prevent seizures.

The study showed that delivering acetate into the blood stream of PDHD mice gave their neurons enough energy to normalize their activity and decrease seizures for as long as the acetate was in the brain.

However, Dr. Pascual said the acetate would probably need more time – perhaps 10 minutes or more – to take effect in humans if taken by mouth.

Acetate, which naturally occurs in some foods, has been used in patients for decades – including newborns needing intravenous nutrition or patients whose metabolism has shut down. But it had not yet been established as an effective treatment for mitochondrial diseases that underlie epilepsy.

Among the reasons, Dr. Pascual said, is that labs have struggled to create an animal model of such diseases to study its effects; his own lab spent about a decade doing so. Another is the widespread acceptance of the ketogenic diet to reduce the frequency of seizures.

But amid a growing concern about potentially unhealthy side effects of ketogenic diets, Dr. Pascual has been researching alternatives that may refuel the brain more safely and improve cognition.

Frequent seizures

Elizabeth, among a handful of patients whose EEG data were used in the new study, has been prescribed a ketogenic diet and some vitamins to control the seizures.

Her family has seen little improvement. Elizabeth often has more than a dozen seizures a day and her muscles and cognition continue to decline. She can’t hold her head up and her mother wonders how many more seizures her brain can take.

Elizabeth was only a few months old when she was diagnosed with PDHD, which occurs when cells lack certain enzymes to efficiently convert food into energy. Patients who show such early signs often don’t survive beyond a few years.

Ms. Mejia does what she can to comfort her daughter, with the hope that Dr. Pascual’s work can someday change the prognosis for PDHD. Ms. Mejia sings, talks, and offers stuffed animals and other toys to her daughter. Although her little girl can’t see, the objects offer a degree of mental stimulation, she said.

“It’s so hard to see her go through this,” Ms. Mejia said. “Every time she has a seizure, her brain is getting worse. I still hope one day she can get a treatment that could stop all this and make her life better.”

‘Big questions’


Dr. Pascual is already conducting further research into acetate treatments, with the goal of launching a clinical trial for patients like Elizabeth in the coming years.

His lab is also researching other epilepsy conditions – such as glucose transporter type I (Glut1) deficiency – to determine if inhibitory neurons in other parts of the brain are responsible for seizures. If so, the findings could provide strong evidence for where scientists should look in the brain to detect and prevent misfiring neurons.

“It’s an exciting time, but there is much that needs to happen to make this research helpful to patients,” Dr. Pascual said. “How do we find an automated way of detecting neuron activity when patients are away from the lab? What are the best ways to intervene when we know a seizure is coming? These are big questions the field still needs to answer.”

https://neurosciencenews.com/eeg-seizure-prediction-10784/
 
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NYU Langone Medical Center

More evidence that cannabis extract effectively treats epilepsy in children

by Alexandra Ossola | May 24, 2017

A large clinical trial has presented the most promising results to date that a derivative of marijuana can help control seizures in children with a form of epilepsy, according to a study published Wednesday in the New England Journal of Medicine.

For children with severe forms of epilepsy, the disease can be a prison. There are some treatments, but they don't work for everyone. If the condition isn't effectively treated, children have hundreds of seizures a day, inhibiting them from doing the kinds of things normal kids like to do. One of the most severe forms, called Dravet syndrome, comes from a rare genetic mutation and is characterized by frequent and prolonged seizures within a child's first year; 20 percent of children with Dravet syndrome die, either unexpectedly or due to accidents that occur during seizures.

There have been a few highly publicized cases of children with Dravet syndrome whose symptoms had been eased by cannabidiol (CBD), a compound in marijuana that makes smokers feel relaxed and calm. These cases were interesting to researchers, but they weren't enough to show them if the treatment would work for everyone with Dravet; a few small clinical trials yielded mixed results.

An international team of researchers decided to collect some data to see if the conclusions from the anecdotes held true. This study, the first large randomized clinical trial of CBD to treat epilepsy, built on the researchers' previous work with CBD and epilepsy; an exploratory study published in January 2016 in The Lancet Neurology found similarly promising results, but focused on a different group of children with epilepsy and lacked a control group. The publicized anecdotes of children with Dravet syndrome, and because the condition is relatively easy to identify by its genetic mutation, made that disease a good place to start, says Daniel Friedman, associate professor of neurology at NYU Langone Medical Center and one of the authors of the current study.

Friedman, along with researchers from 23 centers in the US and Europe, randomly assigned 120 children between the ages 2 to 18 with Dravet syndrome to take an oral CBD medication called Epidiolex, or to take a placebo instead, in addition to their existing drug regimen. The children took the placebo or the dose of Epidiolex (how much depended on the participant's body weight) twice a day for 14 weeks; during that period, their parents recorded how many seizures they had and what type. The patients underwent periodic medical assessments to check for side effects. The researchers asked parents and caregivers to track the number of seizures each patient had per day, and to gauge whether the child's condition improved overall. The researchers included this subjective assessment because "it may capture other aspects of wellbeing that may or may not be related to seizures," Friedman says.

Epidiolex had a clear benefit. The median number of seizures for children on the drug dropped dramatically; 43 percent of the patients taking Epidiolex had just half the number of seizures they had before the trial started. The condition improved in 62 percent of the patients on Epidiolex, according to their caregivers (34 percent of the patients in the control group were said to have improved on placebo). Five percent of the patients on Epidiolex were seizure-free, while zero percent were in the control group.

The drug wasn't universally beneficial. Three quarters of Epidiolex patients had negative side effects, such as nausea, vomiting, and drowsiness, though relatively few were severe. Nine patients withdrew from the study before it ended, almost all because of the side effects. But it's not clear if these adverse effects were from the CBD itself, from other components in the oil, or because the drug interacted with others the patients were taking in the body (it's nearly impossible to parse out this last point, Friedman says, due to ethical concerns about taking children off medications that are providing some benefit).

The results added much-needed data to the well-known anecdotes of epilepsy patients treated with CBD, writes Samuel Berkovic, a professor of medicine at the University of Melbourne, in an editorial accompanying the study in the New England Journal of Medicine. "This trial represents the beginning of solid evidence for the use of cannabinoids in epilepsy. It requires replication," he writes.

And though it's a good start, there's more data needed. The researchers still have questions about the effects of long-term use of CBD. There would need to be more studies to show that CBD could treat other forms of epilepsy, as researchers suspect it might. Luckily, the researchers recently completed two more studies for Epidiolex—a second one for Dravet syndrome and another to treat a different type of severe childhood epilepsy called Lennox-Gastaut syndrome—and are currently analyzing the data. The preliminary results are positive, Friedman says.

Even if future studies do show that CBD is an effective treatment for epilepsy, not everyone has access to it. Patients currently have to travel abroad, enter into clinical trials, or risk legal action to get the drugs they need. The laws surrounding medicinal marijuana in the United States are changing, though perhaps not fast enough for some patients who are suffering now. A more likely scenario is that, with the right kind of evidence, Epidiolex could get approved by the Food and Drug Administration, but marijuana, which contains its active ingredient, could still be legally restricted on a national level.

"The only way to potentially get out of this quagmire is to rethink how we regulate recreational cannabis on a national level without having these carve-outs," Friedman says, referring to states where recreational marijuana is legal. "That's going to be a long discussion that I'm happy to not to have to participate in."

Some of Friedman's patients are already asking him if they can drop their current medication regimens in favor of CBD. "We don't know that yet. We don't know how effective this will be alone," he tells them. Future studies may provide a more definitive answer.

https://tonic.vice.com/en_us/articl...tract-effectively-treats-epilepsy-in-children
 
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Depression linked to seizure frequency in patients with Epilepsy

by Erik Greb | December 1, 2018

Depression severity is correlated with seizure frequency and quality of life in adults with epilepsy, according to an analysis presented at the annual meeting of the American Epilepsy Society.

The conclusion comes from a study of 120 people with epilepsy, 62 of whom had at least moderate depression based on the Patient Health Questionnaire-9 (PHQ-9). The Rapid Estimate of Adult Literacy in Medicine (REALM-R), Quality of Life in Epilepsy (QOLIE-10) and Charlson Comorbidity Index were used to assess patients’ health literacy, and quality of life.

Among demographic characteristics, only inability to work was significantly associated with depression severity. Higher 30-day seizure frequency, panic disorder, and obsessive-compulsive disorder were correlated with more severe depression severity. Medical comorbidity was not associated with increased risk of depression.

Identifying and treating psychiatric issues should be part of the management of patients with epilepsy, said Martha X. Sajatovic, MD, director of the Neurological and Behavioral Outcomes Center at Case Western Reserve University in Cleveland, who presented the data. “Following up to ensure they receive treatment is vital, because it can truly change patient outcomes and help them achieve their best quality of life.”

"The study findings are consistent with those of previous research indicating that people with symptoms of depression are more likely to have more frequent seizures and decreased quality of life,"
said Dr. Sajatovic.

“Health care providers should screen their epilepsy patients for depression, but they shouldn’t stop there,” she advised. “A person may have depressive symptoms that don’t reach the level of depression but should be assessed for other types of mental health issues that could easily be overlooked.”

Patients with epilepsy should respond to the PHQ-9 annually, or more frequently, if warranted, she added.

“It’s important that people with epilepsy who have depression or other mental health issues get treatment such as cognitive behavioral therapy and medication,” said Dr. Sajatovic. “Even being in a self-management program helps, because the better they are at self management, the less likely they are to suffer negative health effects.”

https://www.mdedge.com/neurology/ar...izure-frequency-patients-epilepsy?channel=211
 
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WAND device treats epilepsy

by Dr. Lakshmi Venkataraman | Jan 2, 2019

- Neuromodulation device the WAND
- WAND detects abnormal movements in the brain
- WAND helps prevent tremors and seizures in epilepsy patients


The WAND, a new wireless device developed by scientists at UC Berkeley, can detect abnormal electrical activity in the brain and deliver corrective electrical impulses to treat that.

The device is both wireless as well as autonomous, which means that once it becomes trained to recognize abnormal electrical current in the brain, it is capable of delivering suitable electrical impulses automatically to prevent the undesirable and debilitating movements.

Additionally, it is a closed-loop system meaning it is able to simultaneously record and deliver electrical impulses in real time as stated above. Details of the WAND and how it functions appear in the journal Nature Biomedical Engineering.

Additionally, it is a closed-loop system meaning it is able to simultaneously record and deliver electrical impulses in real time as stated above. Details of the WAND and how it functions appear in the journal Nature Biomedical Engineering.

About the WAND

WAND can record electrical activity at 128 different points in the brain compared to currently available closed loop systems which detects impulses only at eight points. The team demonstrated the working of WAND to detect and delay the occurrence of specific arm movements in rhesus macaques.

Currently, closed loop systems either stop recording brain activity while delivering impulses or record at a site other than where current is delivered. This closed loop system can be programmed for use in several clinical as well as research applications.

"In order to deliver closed-loop stimulation-based therapies, which is a big goal for people treating Parkinson's and epilepsy and a variety of neurological disorders, it is very important to both perform neural recordings and stimulation simultaneously, which currently no single commercial device does," said former UC Berkeley postdoctoral associate Samantha Santacruz, who is now an assistant professor at the University of Texas in Austin.

The engineers who created the WAND have incorporated a chip design that enables recording of the full signal from both abnormal the brain current as well as the stimulation impulse delivered.

The chip design helps to accurately record the brain electrical activity by subtracting the signals arising from the stimulatory electrical current

According to Rikky Muller, who led the team that designed the WAND custom integrated circuits, "Because we can actually stimulate and record in the same brain region, we know exactly what is happening when we are providing a therapy."

Current devices can only record signals from the smaller brain waves and are overshadowed by the bigger stimulation pulses, making this kind of precise signal reconstruction impossible.

Testing the WAND in Humans

The WAND was tested by the study team in human subjects to evaluate its efficacy. The subjects were asked to use a joystick to move a cursor on the computer screen to a specific location. Following an initial training period, the WAND was able to detect the electrical impulses in the brain that were generated as the subjects became ready to perform the above movement (shifting the cursor), and it delivered an appropriate electrical stimulation that delayed this motion.

"While delaying reaction time is something that has been demonstrated before, this is, to our knowledge, the first time that it has been demonstrated in a closed-loop system based on a neurological recording only," Muller said.

The team plans to build intelligent devices with a closed loop system that can be gradually trained to treat the patient on its own without the constant need for a doctor's intervention.

The WAND is an example of how artificial intelligence could be applied in medicine to treat and improve the quality of life of patients.

https://www.medindia.net/news/healt...an-treat-epilepsy-and-parkinsons-184839-1.htm
 
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UC Berkeley

Wireless 'pacemaker for the brain' could offer new treatment for epilepsy

Device fine-tunes treatment by stimulating and and recording electric current in the brain at the same time.

A new neurostimulator developed by engineers at the University of California, Berkeley, can listen to and stimulate electric current in the brain at the same time, potentially delivering fine-tuned treatments to patients with diseases like epilepsy and Parkinson's.

The device, named the WAND, works like a "pacemaker for the brain," monitoring the brain's electrical activity and delivering electrical stimulation if it detects something amiss.

These devices can be extremely effective at preventing debilitating tremors or seizures in patients with a variety of neurological conditions. But the electrical signatures that precede a seizure or tremor can be extremely subtle, and the frequency and strength of electrical stimulation required to prevent them is equally touchy. It can take years of small adjustments by doctors before the devices provide optimal treatment.

WAND, which stands for wireless artifact-free neuromodulation device, is both wireless and autonomous, meaning that once it learns to recognize the signs of tremor or seizure, it can adjust the stimulation parameters on its own to prevent the unwanted movements. And because it is closed-loop -- meaning it can stimulate and record simultaneously -- it can adjust these parameters in real-time.

"The process of finding the right therapy for a patient is extremely costly and can take years. Significant reduction in both cost and duration can potentially lead to greatly improved outcomes and accessibility," said Rikky Muller assistant professor of electrical engineering and computer sciences at Berkeley. "We want to enable the device to figure out what is the best way to stimulate for a given patient to give the best outcomes. And you can only do that by listening and recording the neural signatures."

WAND can record electrical activity over 128 channels, or from 128 points in the brain, compared to eight channels in other closed-loop systems. To demonstrate the device, the team used WAND to recognize and delay specific arm movements in rhesus macaques. The device is described in a study that appeared today (Dec. 31) in Nature Biomedical Engineering.

Ripples in a pond

Simultaneously stimulating and recording electrical signals in the brain is much like trying to see small ripples in a pond while also splashing your feet -- the electrical signals from the brain are overwhelmed by the large pulses of electricity delivered by the stimulation.

Currently, deep brain stimulators either stop recording while delivering the electrical stimulation, or record at a different part of the brain from where the stimulation is applied -- essentially measuring the small ripples at a different point in the pond from the splashing.

"In order to deliver closed-loop stimulation-based therapies, which is a big goal for people treating Parkinson's and epilepsy and a variety of neurological disorders, it is very important to both perform neural recordings and stimulation simultaneously, which currently no single commercial device does," said former UC Berkeley postdoctoral associate Samantha Santacruz, who is now an assistant professor at the University of Texas in Austin.

Researchers at Cortera Neurotechnologies, Inc., led by Rikky Muller, designed the WAND custom integrated circuits that can record the full signal from both the subtle brain waves and the strong electrical pulses. This chip design allows WAND to subtract the signal from the electrical pulses, resulting in a clean signal from the brain waves.

Existing devices are tuned to record signals only from the smaller brain waves and are overwhelmed by the large stimulation pulses, making this type of signal reconstruction impossible.

"Because we can actually stimulate and record in the same brain region, we know exactly what is happening when we are providing a therapy," Muller said.

In collaboration with the lab of electrical engineering and computer science professor Jan Rabaey, the team built a platform device with wireless and closed-loop computational capabilities that can be programmed for use in a variety of research and clinical applications.

In experiments lead by Santacruz while a postdoc at UC Berkeley, and by and electrical engineering and computer science professor Jose Carmena, subjects were taught to use a joystick to move a cursor to a specific location. After a training period, the WAND device was capable of detecting the neural signatures that arose as the subjects prepared to perform the motion, and then deliver electrical stimulation that delayed the motion.

"While delaying reaction time is something that has been demonstrated before, this is, to our knowledge, the first time that it has been demonstrated in a closed-loop system based on a neurological recording only," Muller said.

"In the future we aim to incorporate learning into our closed-loop platform to build intelligent devices that can figure out how to best treat you, and remove the doctor from having to constantly intervene in this process," said Muller said.

https://www.sciencedaily.com/release...0101094517.htm
 
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Sourasky Medical Center's Dana Children's Hospital

Benefits of CBD for epilepsy maintained in two thirds of patients

by Judy George | December 02, 2018

About one-third of patients who used cannabidiol (CBD) to manage treatment-resistant epilepsy developed tolerance to it, researchers from Israel reported here.

In a study of 92 children and young adults with treatment-resistant seizures who used cannabis oil extract for an average of 19.8 months, tolerance to CBD emerged in 32% of patients, reported Shimrit Uliel-Sibony, MD, of Tel Aviv Sourasky Medical Center's Dana Children's Hospital, and colleagues at the American Epilepsy Society annual meeting.

"CBD is a good option for children and adults with certain kinds of epilepsy, but as with anti-epileptic drugs, it can become less effective over time and the dose may need to be increased to manage the seizures," Uliel-Sibony said in statement. While previous research has shown that the effectiveness of cannabinoids can decrease when it is used for pain management and in the treatment of animals with seizures, this is the first large study to show it can occur with humans who use CBD to treat epilepsy, she added.

In the U.S., the FDA has approved a purified, pharmaceutical-grade formulation of cannabidiol (Epidiolex), a chemical component of the Cannabis sativa plant, for children with Lennox-Gastaut and Dravet syndromes. (The current study used a different product.)

In this prospective study, Uliel-Sibony and colleagues followed patients in Tel Aviv, ages 1-37 years (average age 11) from 2014 to 2017 with treatment-resistant epilepsy of various etiologies, ranging from Dravet syndrome and Lennox-Gastaut syndrome to epilepsy caused by stroke. All patients subsequently had been treated with one of two strains of CBD-enriched cannabis oil extract that had a 20:1 CBD-to-tetrahydrocannabinol (THC) ratio.

The researchers defined tolerance as either the necessity to increase dose by ≥30% after efficacy declined, or a response reduction of >30%. They saw tolerance in 30 patients, on an average dose of 12.6 mg/kg/day. The mean time until tolerance appeared was 7.3 months (range 1-24 months).

The researchers increased the CBD dose in most patients who developed tolerance; 12 patients achieved their previous response level and 15 did not.

"By definition, most patients with treatment-resistant epilepsy do not enjoy long-term benefits from a new anti-seizure therapy -- that is, a 'honeymoon effect,'" said Orrin Devinsky, MD, of New York University Langone Health in New York City, who was not involved with the study.

"This study found that tolerance develops in one-third of patients with treatment-resistant epilepsies who showed an initial reduction in seizures to a high CBD/low THC product after 7 months," Devinsky told MedPage Today. "The observation that two-thirds of patients did benefit over a long follow-up period is a key finding."

There was no statistically significant correlation between patient's age and tolerance, but patients with shorter epilepsy duration showed a higher tendency to develop tolerance, Uliel-Sibony's group noted. Predictive factors and mechanisms are unknown, and long-term studies to better characterize the long-term efficacy and safety of CBD are needed, they added.

https://www.medpagetoday.com/meetingcoverage/aes/76647
 
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Breakthrough for children with serious epileptic seizures

University of Melbourne | Apr 18, 2019

Emergency medicine doctors now have a better way to treat severe epileptic seizures in children, thanks to a new study. Prolonged epileptic seizures are the most common neurological emergency in children seen by hospitals. The seizures are potentially fatal: up to 5% of affected children die, and a third suffer long-term complications from brain damage. Crucially, the longer the seizure, the greater the chance of long-term complications.

Prolonged epileptic seizures are the most common neurological emergency in children. The seizures are potentially fatal: up to five percent of affected children die, and a third suffer long-term complications from brain damage. Crucially, the longer the seizure, the greater the chance of long-term complications.

The study -- which will change management of this condition internationally -- was published in The Lancet this week. It was led by Professor Stuart Dalziel from the Faculty of Medical and Health Sciences at the University of Auckland and Starship Children's Hospital, and the senior author was Professor Franz Babl at Melbourne's Murdoch Children's Research Institute.

In severe seizures, the first line of treatment (benzodiazepines) only stops the seizures in 40 to 60 percent of patients. Before this study, the second line treatment was the anti-convulsant drug phenytoin, but until now this practice had never been scrutinised in a robust major randomised controlled trial. Also, phenytoin was known to have a number of serious complications.

Funded by the Health Research Council of New Zealand, researchers compared phenytoin with newer anti-convulsant levetiracetam for the second line treatment of seizures. Levetiracetam is used routinely as a daily medication to prevent seizures, but has not been properly tested against phenytoin for treatment of severe prolonged seizures.

The research, conducted by the PREDICT research network in 13 emergency departments at hospitals in Aotearoa New Zealand and Australia, involved 233 child patients aged between three months and 16 years.

The researchers found that when given individually, the drugs are as good as each other: both had a moderate success rate (50-60 percent) at stopping a prolonged seizure.

But strikingly, treatment with one drug and then the other increased the success rate of stopping a seizure to approximately 75 percent.

Previously, children who continued seizing after phenytoin needed to be intubated, sedated and placed on a ventilator. By giving these two medications one after the other, researchers have potentially halved the number of children ventilated and sent to intensive care.

"This study has now given us robust evidence to manage children with prolonged seizures without reverting to intubation and intensive care," says Dr Dalziel, who is Professor of Emergency Medicine and Paediatrics in the Departments of Surgery and Paediatrics, and a paediatric emergency medicine specialist at Auckland's Starship Children's Hospital.

"By controlling seizures in the emergency department we will increase the chance of these children recovering more quickly and returning back to their normal lives," he says. "This research has already changed practice and led to new guidelines in New Zealand and Australia."

"This study is going to profoundly improve treatment for children who are critically ill with epilepsy around the world,"
says Professor Franz Babl, who is also Professor of Paediatric Emergency Medicine at the University of Melbourne.

 
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Long-term efficacy for Epidiolex in two resistant epilepsy types

by Pauline Anderson | Medscape | December 17, 2018

NEW ORLEANS — Results of open-label extension trials show the recently approved drug Epidiolex (GW Pharmaceuticals), a purified formulation of cannabidiol (CBD), is safe and effective beyond a year in patients with Lennox-Gastaut Syndrome (LGS) and Dravet Syndrome, two rare and resistant epilepsy types.

“We now have long-term data to say that it still works; the efficacy is not going to drop off, and more importantly, it’s still going to be safe and you’re not going to learn anything new down the road,” study author Anup D. Patel, MD, Ohio State University College of Medicine in Columbus, told Medscape Medical News.

Mechanism unclear

The LGS extension study included 366 patients, mean age 16 years, who were taking a mean of three antiepileptic drugs (AEDs). Of these, 52% were taking clobazam (Onfi, Lundbeck) and 38% were taking valproic acid.

The median follow-up was 61 weeks. About 24% had withdrawn from the study at the time of the analysis.

The mean dose of the drug in the LGS extension trial was 23 mg/kg/day.

In this trial, about half the patients had 50% or greater reduction in seizure frequency. "Seizure reduction endpoints were maintained in 36% to 40% of patients, and about 10% of patients were seizure-free after 1 year," said Patel.

“That’s a really big endpoint for a very-difficult-to-treat epilepsy syndrome, so we are pretty excited about that,” he said.

In this study, the CBD dose could be as high as 30 mg/kg/day. “But when we looked at the difference between 20 and 30 mg, there did not seem to be that much more efficacy with the higher dose,” said Patel.

The precise mechanisms by which purified CBD exerts its anti-convulsant effect remains unknown. However, additional research released at the AES meeting suggests a unique multimodal action at three novel targets: GPR55 receptors; TRPV1 channels; and adenosine reuptake transporters.

Adverse events (AEs) occurred in 94% of patients and serious AEs were reported in 33% in the LGS study.

“We saw some of the same side effects,” as in the pivotal trials, said Patel. “We didn’t see anything new emerge.”

"As with the earlier trials, fatigue was the most common side effect,"
said Patel.

About 13% of patients had an increase in liver enzymes, but none met criteria for severe liver injury. "In all but three cases, this resolved," said Patel.

“We don’t know if those three cases will resolve too, but we will continue to follow them.” Some 74% of the patients with elevated liver enzymes were taking valproic acid.

No evidence of tolerance

Similarly, results of an open-label extension trial of Epidiolex in patients with Dravet syndrome were similar, said Patel.

“The side effect profile was similar; the efficacy was very similar, and again, you see maintained endpoints, which is really exciting.”

"Unlike research using CBD combined with tetrahydrocannabinol (THC), there was no evidence of tolerance to Epidiolex in these open-label extension trials,"
said Patel.

He believes this is because “CBD works differently in the brain” than THC in terms of “where it binds and how it works.”

The drug hasreceived US Food and Drug Administration (FDA) approval for LGS and Dravet Syndrome, but is not approved anywhere else in the world.

Before Epidiolex could be made available to patients, the US Drug Enforcement Administration (DEA) had to lower its restriction classification based on its low potential for abuse. In September of this year, the drug was rescheduled from Schedule I to Schedule V, the lowest restriction classification.

“Very Encouraging” findings

Commenting on the findings for Medscape Medical News, Daniel M. Goldenholz, MD, PhD, Instructor in Neurology, Beth Israel Deaconess Medical Center, Boston, Massachusetts, noted that the overall large percent of patients who are tolerating the medication is “very encouraging.”

“It’s certainly very exciting that we have another treatment option for people who are very sick. However," he added, his enthusiasm "is somewhat 'tempered' with regard to some of the efficacy results."

For example, in the 10% of study patients who appeared to be seizure-free, Goldenholz pointed out that "one of the unknowns about the natural history of epilepsy is the extent to which one can expect patients who are drug-resistant “to appear to be seizure free” for a period of time."

“This comes up in many open-label extension trials where there is no control comparison group; indeed, we see some small percentage of patients who become seizure-free in many such trials, including those with drug and device and surgery interventions,”
Goldenholz said.

Some patients may have seizure freedom for a time, and then go back to having seizures, added Goldenholz. “It makes me wonder, are we looking at an effect of the drug or effect of the disease? Without a control group, it’s very hard to be sure.”

"Although the responder rate of patients in the study is also encouraging, the concern is whether this outcome is what patients and families are looking for — a 50% response means you still have seizures,”
he said.

Read more at: https://health.10ztalk.com/2018/12/18/long-term-efficacy-for-epidiolex-in-resistant-epilepsy/
 
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Specific set of nerve cells found to control epileptic seizures

Stanford Medicine | Feb 15, 2018

Experimental activation of a small set of nerve cells in the brain has been found to prevent convulsive seizures in a mouse model of temporal lobe epilepsy, the most common form of epilepsy among human adults, according to a study by researchers at the Stanford University School of Medicine.

In contrast, inactivating these cells, known to neuroscientists as mossy cells, facilitates the spread throughout the brain of the electrical hyperactivity initially localized at a seizure's onset, causing the full-blown behavioral symptoms of temporal lobe epilepsy.

Inactivating this nerve-cell population also induces the same cognitive losses that characterize chronic, drug-resistant temporal lobe epilepsy in humans, the scientists found.

Epilepsy affects 65 million people worldwide, with 150,000 new cases diagnosed annually in the United States alone. Three out of five of those affected suffer from temporal lobe epilepsy. Progressive loss of mossy cells is a hallmark of this disorder.

Mossy cells are known to be damaged easily as a result of head trauma and decreased blood supply. Such brain injuries, in turn, increase the risk for temporal lobe epilepsy.

The role of mossy cells in epilepsy has perplexed neuroscientists for a couple of decades. The new Stanford study, which will be published Feb. 16 in Science, offers an explanation. And it points to an entirely new entry point for developing drugs that could bring therapeutic relief to people with chronic, drug-resistant epilepsy, a debilitating condition that not only circumscribes patients' lifestyles and occupational options but predisposes them to depression, anxiety and early death.

"It should, in principle, be possible to develop targeted therapies directed at mossy cells to control both seizures and the resulting cognitive deficits," said Ivan Soltesz, PhD, professor and vice chair of neurosurgery and the senior author of the study. "This would be great, because the 20 or more compounds now approved for treating patients fail 30 to 40 percent of the time."

The study's lead author is Soltesz's former graduate student, Anh Bui, PhD, now a medical student at the University of California-Irvine.

'An electrical storm in the brain'

Epileptic seizures are sometimes described as 'an electrical storm in the brain.' These storms typically begin at a single spot in the brain, called the focus, where nerve cells -- for reasons that remain unclear -- begin repeatedly firing in synchrony. All too often they spread from the focus to widespread areas throughout the brain, a process called generalization. It's this brainwide hyperactivity that causes the classic behavioral symptoms of epileptic seizures, such as loss of consciousness, convulsions and disordered thinking.

The exact location of the epileptic focus in the brain varies from individual to individual. In the great majority of patients with temporal lobe epilepsy, the focus lies in the hippocampus, a much-studied, seahorse-shaped midbrain structure that's crucial to spatial navigation and to encoding new experiences into long-term memory.

Mossy cells, found exclusively in one section of the hippocampus, are few in number, but each connects with tens of thousands of other hippocampal nerve cells. Via these connections, mossy cells can stimulate a multitude of excitatory hippocampal nerve cells, whose output extends to other sections of the hippocampus. But they can also stimulate an opposing class of cells that inhibit these excitatory cells. Whether the net effect of mossy-cell activity is to promote or counter overall output of the excitatory nerve cells has, until now, been an open question.

To answer the question, Soltesz, who holds the James R. Doty Professorship of Neurosurgery and Neurosciences, and his colleagues turned to a mouse model of temporal lobe epilepsy.

The mice the Stanford investigators used were bioengineered so that their mossy cells responded to pulses of light, conveyed to those cells via an implanted optical fiber. Blue light caused mossy cells to fire, while amber light caused them to resist firing. So, by flipping a laser switch, the scientists could activate or inhibit the mice's mossy cells at will. (This increasingly widespread experimental technique, called optogenetics, is noteworthy for its capacity to target specific sets of nerve cells in order to reveal their function.) The scientists also recorded activity in the hippocampal region where mossy cells reside.

Effects of inhibiting, exciting mossy cells

Soltesz, Bui and their colleagues showed that inhibiting mossy cells, while not increasing the frequency of spontaneous episodes of hyperactivity in the focus of the chronically epileptic mice, did lead to a substantial increase in the number of seizures that spread from the focus to larger areas of the brain. Conversely, excitation of mossy cells in these mice diminished the number of generalized, outwardly visible seizures while having no effect, or merely a minor one, on the frequency of purely focal seizures.

In a memory test that gauges a mouse's recognition of unfamiliar objects, the epileptic mice, despite having lost more than half of their mossy cells, did fine. But they failed another test that assesses their ability to notice when a familiar object has been moved -- a gauge of spatial memory, which suffers a decline in chronic temporal lobe epilepsy. When the Stanford scientists also subjected optogenetically engineered but otherwise normal mice to these tests, they did great -- until the researchers inhibited their mossy cells, at which point these animals' spatial recall headed south, too.

"We've shown that mossy cells' role is protective in preventing the spread to other brain regions of seizures that originate in the hippocampus, the dominant focal site for seizures associated with temporal lobe epilepsy," said Soltesz. "Drugs targeting mossy cells in patients with chronic, drug-resistant cases may someday be able to reduce the incidence of convulsive seizures enough to give patients' back some of their lost lifestyles."

"Such interventions might serve as an alternative to demanding surgical procedures now employed to excise the seizure focus from patients' brains,"
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Boy, interrupted

by Fred Vogelstein | WIRED

This is Sam. He’s my son. His epilepsy caused him to have up to 100 seizures a day. After seven years we were out of options. Our last hope: an untested, unproven treatment. The only problem? It was illegal.

The hospital pharmacist slid three bottles of pills across the counter, gave my wife a form to sign, and reminded her that this was not the corner drugstore. The pharmacy knew how many pills had been dispensed, he said; it would know how many had been consumed; and it would expect her to return the unused pills before she left the country. The pharmacist made it clear that he was not only in touch with our doctor but with the company supplying the medication. They would know if she broke the rules.

Evelyn said she understood and slipped the brown glass bottles into her purse. She and our 11-year-old son, Sam, were jet-lagged. They’d flown from San Francisco to London the previous day, December 19, 2012. Now, 30 hours later, it was just after 7 pm. They’d been at the Great Ormond Street Hospital for Children since midmorning. Sam had been through a brain-wave scan, a blood test, and a doctor examination. Some gel left in his hair from the brain scan was making him grumpy.

Evelyn was terrified. They’d come 5,350 miles to get these pills, medicine we hoped might finally quiet Sam’s unremitting seizures. He was to take a 50-milligram pill once a day for two days, increasing the dose to maybe three pills twice a day. Evelyn was to keep a log of his symptoms during their two-week stay. They would need to revisit the hospital two more times before they returned to San Francisco on January 3, 2013. That meant two more rounds of brain scans, blood tests, and doctors’ appointments.

We were confident the medicine wouldn’t kill Sam or hurt him irreversibly, but the prospect still made us nervous. The pills contained a pharmaceutical derivative of cannabis. People have been smoking cannabis medicinally for thousands of years. Deaths are rare. But Sam would get a specific compound made in a lab. The compound, cannabidiol, known as CBD, is not an intoxicant. (Tetrahydrocannabinol, or THC, is the stuff in pot that makes you high.) Nevertheless, US drug laws made it nearly impossible to get CBD at this purity and concentration in the States.

It had taken four months of phone calls, emails, and meetings with doctors and pharmaceutical company executives on two continents to get permission to try this drug. Sam wasn’t joining an ongoing clinical trial. The company made the pills just for him. It believed CBD was safe based on animal studies. It also said it knew of about 100 adults who had tried pure CBD like this over the past 35 years. As a percentage of body weight, Sam’s dose would approach twice what anyone else on record had tried for epilepsy. Would it make him vomit or become dizzy, or give him a rash or cause some other unpleasant event? We didn’t know. We’d volunteered our son to be a lab rat.

Then there was a bigger question: Would the medicine work? No one knew. The reason Evelyn, Sam, and others in my family—including Sam’s twin sister, Beatrice, and Evelyn’s sister, Devorah—traveled to London during Sam’s winter vacation was that two dozen other treatments we’d tried had all failed. (I stayed behind in San Francisco, scrambling to meet an end-of-year book deadline.)

The one thing we were certain about: This was not going to be a bargain. We’d already spent tens of thousands of dollars on consultants to help Sam’s doctors set up the visit, and we were still at the starting line. The best-case scenario was that the medicine would work and eventually we’d be allowed to import it into the US. We secretly hoped that this would encourage the company to make the drug easily and cheaply available to others. We also knew this was quixotic. Our previous experience with medications suggested the whole venture would end in failure. This much we knew: Importing an experimental cannabis-based drug into the US would involve more than giving the company my address and FedEx account number.

If you’re the parent of a healthy kid, it’s hard to imagine yourself doing what we did. Who spends tens of thousands of dollars on anything that’s not a house, a car, or college tuition? Who lets their child be the first or even one of the first to try any medication? But Sam was not a healthy kid. He has had epilepsy since he was 4 and a half. We’d tried every possible drug—nearly two dozen medications—plus autoimmune therapy using intravenous immunoglobulin and a high-fat medical diet. (I wrote about our two-year diet experiment in The New York Times Magazine.) Little worked, and the treatments that showed some results didn’t work for very long or had worrisome side effects.

Sam doesn’t have grand mal seizures, the type most people imagine when they think of epilepsy: collapsing and twitching on the ground. Instead, he partially loses consciousness for five-to-20-second bursts. It’s a hard-to-treat variant of so-called absence epilepsy. The seizures themselves are more benign than grand mal, and they don’t leave him exhausted. But they are also much more frequent. When Sam’s seizures are uncontrolled he can have between 10 and 20 episodes an hour. That’s one every three to six minutes and sometimes more than 100 a day.

To me, watching Sam have a seizure looks like a movie that’s been paused and restarted. He stops and stares vacantly. His jaw slackens. And his head and torso lean forward slightly, bobbing rhythmically. Then it’s over, and he resumes life as if nothing happened. If he stopped walking, he’ll start again. If he was packing his backpack for school, he’ll continue. Though Sam says that he is sometimes aware when he has a seizure, typically his only clue is that when he comes to, everything around him has shifted slightly.

When they are frequent—which has been often—it’s hard for Sam to have a conversation, let alone learn anything in school. Sports? Not possible. As a little kid, Sam couldn’t even cry without being interrupted: He’d skin a knee, cry for 15 seconds, have a 15-second seizure, and then continue crying. Once, after watching a movie with me, he complained about the DVD being scratched. It wasn’t. It just seemed that way because he’d had so many seizures.

And while Sam got little help from the many antiepileptic medications that we tried, he endured plenty of side effects. One drug gave him hand tremors. Another made him violent. A third gave him hives. A fourth made him such a zombie that he drooled, while a fifth made him see bugs crawling out of holes in his skin. Twice his seizures were bad enough that we had to hospitalize him. He’d seen six neurologists at four hospitals in three states. I’ve seen him seize tens of thousands of times. You’d think I’d be used to it, but I find each one haunting—as if some outside force has taken over his body, leaving me, the person who is supposed to protect him, powerless.

By 2012, when Sam was 11, the only thing that was keeping his seizures controlled enough for him to attend school was massive doses of corticosteroids. If you or anyone close to you has had cancer, bad asthma, or any kind of major inflammation, you know about these drugs, which are synthetic versions of the body’s own anti-inflammatory compounds. Taken for a week or two, they can be lifesavers. But taken for extended periods, they wreak havoc on the body.

By the time he reached London, Sam had been on a big dose of the corticosteroid prednisone off and on for a year. It made him gain 30 pounds. It made his face look like it had been pumped full of air—a side effect known as “moon face.” And it weakened his immune system. He was starting to get head and chest colds every month. Were he to stay on these drugs at these doses longer-term, he would face stunted growth, diabetes, cataracts, and high blood pressure—all before he was old enough to vote.

So the trip to the UK felt like a last resort: If these pills got his seizures under control, he’d have as good a chance as any healthy kid to grow up to be a happy, successful adult. If they didn’t, well, we were out of options. He might grow out of his seizures, but there were no other medications or treatments that our doctors knew to try. It seemed hard to imagine him ever living on his own.

Sam’s situation is hardly unique. About 1 percent of the US population has epilepsy, and about a third of that 1 percent has epilepsy that can’t be curbed with medication. That’s nearly 3 million Americans with epilepsy and 1 million Americans with uncontrolled seizures. Epilepsy is more prevalent than Parkinson’s or multiple sclerosis. More than a dozen antiseizure drugs have come to market in the past 25 years. They’ve reduced the side effects associated with antiepileptics, but the new drugs haven’t proven much more effective at reducing seizures. The number of hard-to-treat cases of epilepsy like Sam’s hasn’t changed meaningfully in decades.

There are dozens of seizure disorders. Some cause patients to collapse like marionettes whose strings have been cut. Others cause a single limb to twitch. Big seizures can cause brain damage. And tens of thousands of people die every year from status epilepticus, a seizure that goes on for more than five minutes and typically requires a trip to the emergency room.

Think of a seizure as an overtaxed electrical grid. The human body is full of electricity that allows brain cells, nerves, and muscles to communicate in an orderly, controlled fashion. A seizure happens when this electricity spikes uncontrollably. As a result, parts of the brain’s circuitry temporarily shut down. You’d think medical science would be able to tell you why this happens and what to do about it, but with a few exceptions it can’t. Modern medicine can reattach fingers, replace a faulty heart, liver, or kidney, and regrow skin in a petri dish, but the brain’s abnormalities remain mostly mysterious and largely invisible.

Indeed, most epilepsy cases are like Sam’s, idiopathic, a fancy way of saying “no known cause.” A typical prognosis: If we can control the seizures with the first three meds, he’ll probably never have another one. If we can’t, the future is less certain. Beatrice developed absence epilepsy when she was older, in 2010. The first drug made the seizures disappear. She took it for two years. We have never seen another seizure.

There was nothing invisible or mysterious about Sam’s epilepsy in London, however. By the time he and Evelyn arrived, his seizure count was approaching its highest level ever. We had expected this. We’d reduced one of the drugs helping to control his condition five days before they left. If the drugs in London worked, we’d need convincing data to get permission to import them into the US. To get convincing data, we’d need to show a marked reduction in seizures.

It was not easy to watch. Two days before departure he had eight seizures. One day before departure he had 25. The day of departure he had 20, including 12 in the 88 minutes between 5:50 pm and 7:18 pm, immediately after the flight to London took off. By the end of the next day, when they picked up Sam’s pills at the Great Ormond Street Hospital pharmacy, his seizures had more than tripled to 68. Past experience told Evelyn that if the pills didn’t work fast, the following day would be a complete wipeout with more than 100 seizures.

The first time Evelyn and I talked about cannabis as a treatment for epilepsy was in early June 2011. The high-fat diet Sam had been on for two years had stopped working. There were no more conventional antiepileptic drugs to try. In our scramble to find solutions, Evelyn learned that a nurse-practitioner in one of our doctors’ offices was starting a cannabis collective—outside of work—to help some of the physician’s sickest kids. Other parents of epileptic kids we knew were joining. Besides having a medical degree, the nurse was an herbalist. She’d heard that cannabis—if made into oil-based tinctures, taken by the drop instead of smoked—could help people with intractable seizures. Evelyn liked the fact that the nurse sent her a 1981 paper from The Journal of Clinical Pharmacology on cannabinoids as potential antiepileptics. And she liked that the nurse assured her that the cannabis being used wouldn’t get anyone stoned. It would be high in CBD and low in THC.

Neither of us wanted to join the collective immediately. We had two other options for Sam we wanted to try first—corticosteroids and intravenous immunoglobulin. We also knew that if we were going to ditch Western medicine to treat Sam’s epilepsy, we’d have to do a lot more homework. Many people, often justifiably, hate drug companies. But one thing they are good at is making sure that every pill, drop, or spray of medicine they supply is exactly the same. Treating Sam’s epilepsy with cannabis would mean the reliability, consistency, and potency of his medicine was no longer assured.

My first reaction to the idea of trying cannabis to treat Sam was that it sounded crazy. I’d smoked plenty of weed in college and in my twenties. I knew the plant could have real medicinal effects; medical cannabis was legal to buy in California with proper documentation. But rightly or wrongly, the idea of controlling Sam’s seizures with cannabis—he was 10 at the time—alarmed me. I associated pot with partying, not treating my son’s serious illness. I hated having the two thoughts side by side.

But the desperate can’t afford to be doctrinaire. And by the time another year had passed, we were desperate. Intravenous immunoglobulin hadn’t worked. And it was becoming increasingly less safe to control Sam’s seizures with high doses of corticosteroids. In May 2012 we wrote a $600 check to join the cannabis collective.

We knew to expect uncertainty. Plants as medicine are by their nature variable in potency. The nurse was still trying to figure out which strains worked best and the optimal way to turn those strains into tinctures. And while some parents were reporting good results, no one was seizure-free.

But over the previous year we had also learned that treating epilepsy with cannabis wasn’t crazy at all. A small but growing body of research suggested that CBD might be a powerful anticonvulsant. Evelyn took particular note of a 2010 paper in Seizure, the medical journal of the British Epilepsy Association, that she found through a Google search. With charts and tables sprinkled over eight double-columned pages, the authors said that extensive tests on rodents in their labs, along with previously published data, “point to CBD being of potential therapeutic use (alone or as an adjunct) in the treatment of epilepsies.”

And then, remarkably, the first tincture we tried from the collective seemed to ratify those findings. For three days, Sam’s seizures went from what had been 10 to 20 an hour to about one every hour. The tincture was odd-looking—a bunch of cannabis leaves and stems in a brown mason jar marinating in oil. Using a syringe, we’d put a drop of the liquid on Sam’s tongue three times a day. It was supposed to be 20:1 CBD to THC.

But in July, coinciding with a new tincture, Sam’s seizures came roaring back. By the middle of the month he was having around 10 an hour. We tried increasing the dose. We tried tinctures bought at three medical cannabis dispensaries. They didn’t work either.

By mid-August we were thinking about putting Sam back on steroids. That was when the collective received test results for the latest batch of tinctures. They’d been advertised as having a 20:1 ratio of CBD to THC, but it turned out there was little CBD or THC in any of them. We also tested one of the other tinctures we’d bought from a supposedly reputable supplier. We’d been told it was 10:1 CBD to THC. It was really 3:1. The tincture that seemed to work for Sam in June hadn’t been tested, so we had no idea how to assess the temporary drop in seizures.

The experience with the unscientific methods of the collective and with the false labeling of products in dispensaries was infuriating and demoralizing. We knew the collective was still finding its way when we joined. And we knew that buying tinctures at dispensaries wasn’t like going to Walgreens. But somehow we convinced ourselves that the collective had mastered the basics—that you don’t tell parents a medicine is a certain potency unless you’ve had it tested. We really only had ourselves to blame, though. We didn’t have the tinctures tested either.

One parent we met through the collective decided to try to make a high-CBD tincture in her garage. Catherine Jacobson, whose son, Ben, also has epilepsy, has a PhD in neuroscience. She developed a method that took three days plus another five days of testing to produce a three-week supply.

It was anything but simple. She started by heating the cannabis for 30 minutes in her oven at 350 degrees to activate the THC and CBD. Then she put it in a plastic bag, crushed it, and dumped it into a beaker filled with ethanol. She let the mixture sit overnight on a stir plate, lab equipment which agitated the mixture, pulling the compounds out of the cannabis and into the ethanol. Then she strained it and put the ethanol on the stir plate for another eight hours until most of the liquid had evaporated. On the third day, she ran the mixture through a carbon column, using a vacuum pump. The column, which looks like a glass cylinder with carbon beads over a small opening at the bottom, separated CBD from the THC based on molecular weight. At the end of the process she’d have ten 10-milliliter test tubes. After testing, two or three would have a high-enough CBD-to-THC ratio to be usable. She’d concentrate those further to make medicine. Jacobson’s setup could only handle about a quarter pound of cannabis at a time.

That meant that if she started on a Friday night and spent all day Saturday, another half-day on Sunday, and waited another five days for test results, she’d have a 10-day supply of CBD the following weekend. The cost: about $750 for the cannabis and another $200 for ethanol. Two labs tested it at more than 100:1 CBD to THC. Ben and Sam seemed to respond to it. But she was only able to give us five days’ worth because it had been so labor-intensive to make.

Something else was happening throughout the spring and summer of 2012 that I only found out about much later. Evelyn had started wondering how to contact the head of a drug company in the UK. She’d been thinking a lot about that article in Seizure—the one that documented how pure CBD slowed seizures in rodents. But it wasn’t just the encouraging results that caught her eye. It was the authors, all researchers at the Schools of Pharmacy and Psychology at the University of Reading, one of the UK’s top research institutions. She noted that they had thanked GW Pharmaceuticals, a British company she’d never heard of, for funding the study.

GW, we soon learned, manufactured pharmaceutical-grade extracts of both THC and CBD. Its main business came from a drug called Sativex, which contains a mix of the two compounds in a mouth spray for sufferers of cancer pain or multiple sclerosis. But it also seemed to have supplied pure CBD to the authors of the Seizure study.

For Evelyn this was revelatory. CBD was the only thing left that might help control Sam’s seizures. And over in the UK there was a drug company making the stuff by the pound. The next move was obvious: Find out who ran GW—she quickly determined that his name was Geoffrey Guy—and figure out how to contact him.

She emailed the GW general mailbox and called the main phone number and left a message. No response. And then on August 17, 2012, we had a heated conversation with my dad. We were visiting him at his house in Wyoming, and he sat us down wanting to know what the next steps were with Sam. He was worried that the constant struggle was crushing our family. He was also worried that we’d given up, that in our desperation we’d become like acrophobic climbers, terrified to change our position on a cliff despite only being 5 feet off the ground. That was painful to hear, but it also gave Evelyn an idea. She came to breakfast the next day and said, “If you really want to be helpful, get us in touch with Geoffrey Guy.”

And that’s what he did. His firm, Warburg Pincus, had been doing business in London for 25 years. On August 20 he emailed some associates, detailing Sam’s situation. Eleven days later Geoffrey Guy wrote to Evelyn asking how he could help. Later that day he told Evelyn on the phone that figuring out a way for Sam to try GW’s CBD was eminently possible, and that he would do what he could to be helpful.

What we didn’t know at the time was that Guy and his team had already been wondering about human trials with CBD for epilepsy. And it turned out that the kind of one-patient experiment we were suggesting wasn’t unheard-of in the UK. Doctors there can get promising medications for their patients from the manufacturer to be used under their direct responsibility. It’s known as administering on a named-patient basis. No regulatory approval is required as it is in the US. Guy said he’d done it with more than a thousand patients in his career. “I have been looking for a number of years at using CBD in just such a situation,” Guy says. “You are a parent of a child who had a specific need. All other medicines had failed to help. We had a medicine that might help. Why on earth would that not be a good and wholesome thing to do?”

The catch was that GW would only consider helping us get CBD for Sam if we did it completely aboveboard. We couldn’t try the drug in the US. We’d have to go to the UK. We’d need our US doctor’s permission. We’d have to find an epilepsy doctor in London to take our case and to agree to supervise the treatment and various tests.

And if the medication worked, we’d need to navigate a labyrinthine approval process to legally import the drugs into the US. The research ethics committee at our doctor’s employer, UC San Francisco, would have to approve our plans to administer the medication at the hospital. Would a public institution like UCSF, dependent on federal research grants, agree to oversee treatment with a quasi-legal drug? The US Food and Drug Administration would need to sign off on what we were doing. The FDA has a process for individuals to get approval to try unapproved drugs on a so-called compassionate-use basis. We’d heard the applications were typically hundreds of pages long.

And then we’d need clearance from the US Drug Enforcement Administration. The head of the DEA at the time, Michele Leonhart, took a hard line on cannabis, which to this day remains listed as a Schedule I drug, supposedly as dangerous and addictive as heroin. Despite legalization efforts in some states, it’s the federal government that controls the borders, and to get any illegal drug across the border you must get approval from the DEA.

The magnitude of the undertaking was daunting, not to mention the cost. Just traveling to London, staying for two weeks, and paying doctors’ bills out of pocket would run into the thousands. We’d have to hire consultants to draft our applications to the FDA and DEA. Our doctor hadn’t done anything like this before. The only way she was going to be able to get behind it on our behalf was if we handled all the paperwork for her.

Back then, UK regulators said they would never approve it. But by the middle of the decade, the British political landscape had shifted significantly. The courts were clogged with the cases of multiple sclerosis and cancer patients who’d been arrested for using cannabis to combat things like muscle spasticity and the nausea from chemotherapy. Politicians and activists were calling for partial legalization.

And so, in July 1997, Guy found himself at a joint conference of the Royal Pharmaceutical Society and the Multiple Sclerosis Society. Onstage were top UK doctors and regulators wondering aloud what it would take for a company to make a cannabis pharmaceutical. Guy raised his hand and explained how he thought it could be done. A year later, in June 1998, Guy and cofounder Brian Whittle got permission to start GW. “It was like a wormhole opened up and we’d spent the previous 10 years studying wormholes,” Guy says.

By 2012, GW was one of only a handful of firms in the world doing legal, drug-company-quality research on cannabis. It owned enormous hothouses containing thousands of cannabis plants in legal but undisclosed locations southeast of London. It had modern labs converting the plants into medicinal extracts and a factory that could turn them into sprays, tinctures, and pills. It had 177 employees and $51 million in revenue. And it was manufacturing its first drug, Sativex, already approved for sale in the UK, Canada, and 22 other countries to treat MS.

Back in the UCSF conference room, we finalized our plans: Evelyn would take Sam to London, where he would try pure CBD pills made especially for him. He wouldn’t be the first person to try pure, pharmaceutical CBD for epilepsy. Four small studies between 1978 and 1990 had tried it on a total of about 40 people. Surely others had tried homemade concoctions. But he’d certainly be the first kid, and arguably the first person in more than 20 years, to try CBD of this purity for epilepsy. We hoped it would work for Sam and that many other patients like him would follow.e met Geoffrey Guy face-to-face in a conference room off the eighth-floor neurology waiting room at UCSF. We were dressed like we lived in California. Guy was dressed like an early-20th-century English banker. He wore a double-breasted suit, a white-collared blue shirt with French cuffs, and a yellow tie with blue polka dots. Evelyn and I had been exchanging emails with him since the end of August 2012. Now, in early December, we were sitting down to discuss some last-minute details of our London trip. The meeting was also an opportunity for Guy to talk with Sam’s new doctor, Roberta Cilio. Sam’s longtime neurologist had had to take an emergency leave of absence the week before. Cilio, an eminent Italian physician who had only joined the staff of UCSF the previous September, was jumping into the middle of an unfamiliar case. We were meeting her for the first time too.

We knew little about Guy at that point other than the essentials: He was a longtime biotech entrepreneur, and he had an experimental compound that, turned into a drug, might help Sam.

We learned later that he’d started three notable drug companies and brought more than a dozen medicines to market. He knew more about cannabis than almost any executive in the world. And in more than 30 years as a biotech CEO he had built a reputation as a maverick—someone attracted to the thorny, controversial pharmacological issues that most executives try to avoid. Guy had been thinking about starting a company to make medicines from cannabis since the early 1990s.

Settling into London, Evelyn was almost afraid to believe how well the treatment seemed to be working. After having 68 seizures on Thursday, the day Sam and Evelyn spent at the Great Ormond Street Hospital, Sam had 10 on Friday and five on Saturday, 10 on Sunday and six on Monday. And as she increased the dose of CBD from 50 mg a day to 250 mg a day, his seizure count continued to fall. They didn’t see any side effects.

Sam’s seizures decreased so quickly—in less than 24 hours—that two days after he took his first pill he was zip-lining 30 feet in the air above a carnival spread out over half a mile in Hyde Park. He was harnessed, so he couldn’t fall. And because he has a weakness for the scariest ride in any amusement park, Evelyn couldn’t say no.

At first we said nothing to family or friends. We worried that, like so many promising treatments we’d tried, the effect would be only temporary. But by December 28, 2012, eight days after Sam’s first pill, it was obvious that we were witnessing something fantastic. “Best day yet,” Evelyn wrote to friends and relatives. “Today Sam had a total of three seizures—short, seconds-long. From our starting point of SIXTY-EIGHT seizures. I would say we are doing very well. And we can go higher on the dose if we like. Along with being nearly seizure-free, Sam is more mature, more relaxed, and funnier. No idea if that is a physiological effect or just a result of not having his train of thought interrupted all the time, but who cares … I love to see all that come out.”

Our euphoria lasted only two weeks. The trial was ending, and Guy wasn’t going to let us take any CBD back to the US. On January 2, 2013, he emailed Evelyn telling her that he’d be sending one of his executives by the hotel to pick up the unused pills.

We knew to expect this, but it was still excruciating. Two weeks into enjoying the best seizure control of Sam’s life, we were being asked to give back the medicine that got him there. We had cobbled together a plan to manage Sam’s seizures during the time it would take us to obtain permission and cooperation from UCSF, the FDA, and the DEA. We hoped that would happen in less than six months, as we’d been told. But no one knew for sure. When you’ve found the first medicine in seven years that controls your child’s debilitating illness, not having it for an hour feels too long.

What we used to control Sam’s seizures during that time seems irresponsible in retrospect. A few weeks before we left for London we’d found an outfit in Colorado that claimed to make CBD pills from hemp. They seemed to help Sam a bit, and the company was willing to send the pills through the mail. Testing showed a CBD-to-THC ratio of 18:1. But we didn’t have any idea where they were getting their raw material. We didn’t know whether their manufacturing process was clean. A month’s supply cost more than $1,000. At the time it seemed better than putting Sam back on steroids.

The agents from the DEA appeared without an appointment at Cilio’s UCSF office door on March 1, 2013. They showed her their badges, asked permission to question her, and made it clear that this was not going to be a friendly conversation. “They asked a lot of personal questions: Where was I from? Had I ever used (illegal) drugs?” she says, adding that it made her feel like she was part of a TV crime drama.

The questioning, which went on for two hours, got particularly tense when the agents asked Cilio how she planned to dispense the special drug. “I said that I would keep it here in my office and then put it in my purse and walk across the street to the clinic to see my patient. And they said, ‘You have no idea what you are talking about. This is a Schedule I drug. It’s like heroin. You can’t cross the street with it in your bag. You have to keep it in your office, and you have to give it to the patient in your office.’”

As part of the special license application process, she’d been briefed by UCSF security and demonstrated to the agents that she understood how the locks and alarms worked in her office suite and building. They weren’t satisfied with this either. They took pictures of the furnishings in her office, including the cabinet she told them she was going to store the medicine in. They told her she would need a safe.

I was both elated and panicked when I heard about the agents’ interview. Setting up a site visit by agents is notoriously slow. Our application had been live for only about eight weeks. But I worried the DEA’s demand for a safe would suck our application into a bureaucratic quagmire. I had initially thought the agency would be satisfied with a cheap jewelry safe I could buy at the hardware store. I was wrong.

According to government regulations, the safe needed to be certified for “30 man-minutes against surreptitious entry; 10 man-minutes against forced entry; 20 man-hours against lock manipulation; and 20 man-hours against radiological techniques.” What this means in English is a 3-foot-square steel box that weighs 965 pounds and looks like something the Road Runner used to drop on Wile E. Coyote. But it never occurred to me that you could buy one. Would UCSF actually pay for something like this? Even if it would, I envisioned months of paperwork just to get the university’s approval.

It turns out that used safes are not hard to find. Cilio said that if I bought one, she’d gladly put it in her office. UCSF officials said it was OK as long as the safe didn’t violate building load limits. And within a day I was the proud owner of a used blue Meilink TL-15 plate safe with a group 1R lock. And by week’s end I’d had it delivered to Cilio’s office. The cost for unraveling this bureaucratic knot: $2,100.


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The DEA approved our application on March 19. Between getting import permits, clearing customs, and Cilio’s unrelated attendance at an overseas conference, another six weeks passed. Sam took his first CBD pill in the US on May 4, three weeks before his 12th birthday.

The total bill for getting GW’s CBD into the US was roughly $120,000, not including travel. Two consulting firms—one an expert in the workings of the FDA, the other an expert in the DEA—generated most of those expenses. It’s an enormous amount of money to pay for outside help, more than double what we’d thought it would cost.

But it’s hard to imagine how we could have done it without them. Cilio had dozens of other patients to attend to besides Sam. And because she was new to the US, she had no idea how complicated and emotionally charged anything associated with cannabis can be here. The consultants showed her how to fill out the mountain of paperwork involved in applying to the FDA and the DEA. And they worked their contacts inside the agencies to make sure our application kept moving. The DEA agents, despite being antagonistic with Cilio and demanding that we get a safe to store Sam’s drugs, also moved our application along quickly when we speedily met their demands. The day we had the safe delivered to Cilio’s office, an agent visited to ensure it met DEA requirements. And he immediately advanced our application to the next step.

We wouldn’t have even known that consultants did work like this had Steve Willard, a Washington, DC, drug company entrepreneur, not introduced us to them. Sam now says he’s his best adult friend, even though he was my dad’s friend first.

Usually, getting access to experimental drugs that are potentially lifesaving doesn’t work this way. With terminal cancer patients, for example, oncologists know what new drugs are in development and have a mechanism already established to work with a company and quickly get FDA approvals. Yet GW was supplying drugs that were illegal in the US. No US hospital would take on a project like this.

But it appears our enormous bill for helping Sam has also jump-started the development of what doctors tell us could be one of the most exciting new drugs to treat epilepsy in a generation. Within a month of our return from London in early 2013, Guy and GW started talking to epileptologists at four other US hospitals about doing studies with their sickest kids. And on January 26 in New York City, 15 doctors, researchers inside and outside the US government, and GW officials sat in a conference room at NYU and began mapping out a strategy.

Those initial investigations—five hospitals, 25 kids apiece—proved so encouraging that GW last year expanded them to what it expects will be 1,400 patients at more than 50 hospitals in the US and the UK by year’s end. The drug now has a name—Epidiolex—though for a day or two Guy talked about naming it after Sam. It has a fast-track designation from the FDA, meaning that it could be available at Walgreens inside of three years.

Epidiolex is not a miracle cure. The most recent data, out in April, shows that of 137 kids who tried it for 12 weeks, it helped about half, reducing their seizures by at least 50 percent, with 9 percent becoming seizure-free. This is a better response rate than it sounds. All of the patients in the trials are those like Sam who had already run out of conventional options. But it is also a reminder that CBD, Epidiolex, or any seizure drug doesn’t help everyone.

Today CBD’s potential for treating epilepsy has become an important story in medicine. In August 2013 Sanjay Gupta, CNN’s chief medical correspondent, reported on a cannabis strain that had all but cured Charlotte Figi, a 5-year-old girl with Dravet syndrome, one of the worst kinds of epilepsy. Figi was in a wheelchair, on a feeding tube, with a do-not-resuscitate order before her parents started experimenting with high-CBD cannabis in 2012. The oil, supplied by a group of evangelical Christian brothers in Colorado Springs named the Stanleys, helped her almost immediately. Figi quickly went from 300 grand mal seizures a week—an average of 40 a day—to about four a month.

That cannabis documentary on CNN, a second in 2014, a third in April this year, and a week’s worth of editorials in The New York Times in 2014 have ignited a national conversation not just about CBD for epilepsy but about whether it is time to legalize cannabis entirely. Twenty-three states have legalized medical cannabis, 18 states have decriminalized recreational cannabis too, and four states have made recreational use completely legal. Expect at least five more states, including California, to put complete legalization to a vote in 2016. And bills in Congress to change the laws on a federal level, which at a minimum would make it easier for researchers to study cannabis in the lab, are getting traction for the first time.

Edward Maa, a neurologist at the University of Colorado, Denver, is doing the first study of the Stanley brothers’ strain, now called Charlotte’s Web, to get data on its effectiveness. He has 14 Dravet patients so far. The Stanleys now ship Charlotte’s Web across state lines, because the cannabis has so little THC that it is considered hemp. The operation has 3,508 customers, about a third of them kids with epilepsy.

Little of this was happening four years ago, when Evelyn and I first started using cannabis and epilepsy in the same sentence, and watching Sam’s life unfold alongside it has been profound. Sam isn’t seizure-free, but he’s close, like he was in London. He has between zero and five seizures a day, and he’s been off all other antiepileptic medications for almost two years. GW makes Epidiolex only as a liquid now. Sam takes 3.5 ml at breakfast and dinner. Evelyn and I are still thinking about how we can eliminate the last of the seizures. Sam is, perversely, more frustrated by these episodes than when he was seizing every few minutes. Back then he was in a fog. Now, because he is so close to being seizure-free, he feels each disruption more keenly. He increasingly understands that if we can’t get the remaining few to go away, he won’t be able to drive or ride a bike.

But for the first time in a decade—since he was in preschool—he is living like a normal boy. He takes a bus and a train home from school in San Francisco every day. He’s studying to be a bar mitzvah next year. He plays Halo at his friend Brian’s house on Friday afternoons. Before school let out for the summer, he was doing more sports than he actually had time for. He fences three times a week. He was on his school’s indoor soccer team. And he runs a nine-minute mile. Sure, he’s about 5:15 off world-record pace. But he could barely run 100 yards without seizing three years ago. Last summer we went fly-fishing and rock climbing with ropes. He makes up songs in the morning before school.

And he is turning out to be a smart, thoughtful kid. Lately on car rides he asks me questions like this: “Why does everything have to cost money? Why can’t it all be free? Money is just paper. What do we need it for?” Or “Why are we here? Where did we come from?” He is arguably late asking such questions, but that doesn’t bother me. For most of the past decade I was worried Sam would never be well enough to even formulate thoughts like this. And he was very clear about the fact that he wanted me to write this story. “People need to know what this looks like,” he told me when we discussed it. He recalled one of his earliest memories of having seizures in kindergarten: “Do you know what it’s like to be line leader, have a seizure, and wake up with everyone yelling at you?”

Listening to him talk like this or hearing Evelyn recall her conversations with him is bittersweet. Most of us spend our childhood blissfully thinking that our parents can solve most of the big problems we face. Sam had to find out way too early that sometimes that’s just not true. I hate that he had to learn that lesson so soon. I hope surviving it will give him the inner strength to better handle life’s other beanballs.

All of it makes me recall a conversation I had in 2009 with Doug Nordli, an eminent Chicago epileptologist. He made a point of saying that, as hard as we might find it sometimes, the one thing we should never do is become hopeless about Sam’s seizures. This wasn’t just a pep talk. He said that he’d seen kids like Sam rebound with astonishing speed once their seizures were brought under control. I wanted to believe him, but back then I just couldn’t. Now I see proof every day of how wrong I was.

 
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New research could help predict seizures before they happen

Neuroscience News | June 10, 2019

A new study has found a pattern of molecules that appear in the blood before a seizure happens. This discovery may lead to the development of an early warning system, which would enable people with epilepsy to know when they are at risk of having a seizure.

Researchers at FutureNeuro, the SFI Research Centre for Chronic and Rare Neurological Diseases, hosted at RCSI (Royal College of Surgeons in Ireland) led the study, which is published in the current edition of the Journal of Clinical Investigation (JCI).

FutureNeuro and RCSI researchers have discovered molecules in the blood that are higher in people with epilepsy before a seizure happens. These molecules are fragments of transfer RNAs (tRNAs), a chemical closely related to DNA that performs an important role in building proteins within the cell. When cells are stressed, tRNAs are cut into fragments. Higher levels of the fragments in the blood could reflect that brain cells are under stress in the build up to a seizure event.

Using blood samples from people with epilepsy at the Epilepsy Monitoring Unit in Beaumont Hospital, Dublin and in a similar specialist centre in Marburg, Germany, the group found that fragment levels of three tRNAs “spike” in the blood many hours before a seizure.

“People with epilepsy often report that one of the most difficult aspects of living with the disease is never knowing when a seizure will occur,” said Dr Marion Hogg, FutureNeuro investigator, Honorary Lecturer at RCSI, and the study’s lead author.

“The results of this study are very promising. We hope that our tRNA research will be a key first step toward developing an early warning system.”

Approximately 40,000 people in Ireland have epilepsy and one third of those do not respond to current treatments, meaning they continue to experience seizures. The World Health Organisation estimates that more than 50 million people worldwide have epilepsy.

"New technologies to remove the unpredictability of uncontrolled seizures for people with epilepsy are a very real possibility,” said Professor David Henshall, Director of FutureNeuro and Professor of Molecular Physiology and Neuroscience at RCSI who was a co-author on the paper.

“Building on this research we in FutureNeuro hope to develop a test prototype, similar to a blood sugar monitor that can potentially predict when a seizure might occur.”

 
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Strobe lighting at concerts linked to a tripling of epileptic fit risk

Neuroscience News | June 11, 2019

Strobe lighting at concerts may be linked to a tripling in the risk of epileptic fits in susceptible individuals, suggests research published in the online journal BMJ Open.

Organisers need to issue warnings and advice on preventive measures, particularly for those who have a history of epilepsy that responds to flashing lights, known as photosensitive epilepsy, argue the researchers, who note that the popularity of dance music events generates revenues of US$ 5.7 billion every year worldwide.

Strobe lighting is known to heighten the risk of epileptic seizures in susceptible individuals. But the risks associated with attending electronic dance music festivals are not widely known, and organisers consequently don’t routinely warn visitors about them.

Prompted by the case of a 20-year-old who collapsed at one such festival and then experienced an epileptic seizure for the first time, the researchers decided to look in more detail at the potential health impacts of strobe lighting at dance music events.

They drew on data for incidents requiring medical assistance, including for ecstasy use, among 400,343 visitors to 28 daytime and nighttime electronic dance music festivals in The Netherlands throughout 2015.

They used data from one company which provides medical services to nearly all dance music festivals in The Netherlands.

Eyewitness reports of a sudden loss of consciousness and muscle twitching combined with physical findings, such as evidence of tongue biting and temporary urinary incontinence, were used to inform a diagnosis of an epileptic seizure.

Some 241,543 people attended nighttime gigs, where strobe lighting was used, and 158,800 attended daytime gigs, where strobe lighting was less intense because of the effects of sunlight.

In all, medical assistance was provided on 2776 occasions. In 39 cases this was for an epileptic seizure, 30 of which occurred during nighttime gigs, meaning that the risk of a seizure associated with a nighttime event was 3.5 times greater than for a daytime event.

Use of ecstasy, which is the most commonly used recreational drug at dance music events, and which has been associated with heightened epileptic seizure risk, was more likely among those attending nighttime events: around one in four compared with one in 10 of those attending daytime events.

But the proportion of cases in which the drug had been used was similar in both groups of visitors, suggesting that this alone wasn’t responsible for the heightened seizure risk, suggest the researchers.

This is an observational study, and as such, can’t establish a cause. What’s more, the researchers weren’t able to glean other potentially influential factors, such as medical history, sleep deprivation, or use of other medication, and they relied on witness reports/on-site medical assessments, all of which may have affected the accuracy of the figures.

But, they write: “We think, however, that our numbers are probably an underestimate of the total number of people who had epileptic seizures.”

And they add: “Regardless of whether stroboscopic light effects are solely responsible or whether sleep deprivation and/or substance abuse also play a role, the appropriate interpretation is that large [electronic dance music] festivals, especially during nighttime, probably cause at least a number of people per event to suffer epileptic seizures.”

They advise anyone with photosensitive epilepsy to either avoid such events or to take precautionary measures, such as getting enough sleep and not taking drugs, not standing close to the stage, and leaving quickly if they experience any prodromal ‘aura’ effects.

“Given the large dataset, we believe our findings are externally valid, at least for other [electronic dance music] festivals in other countries which generally attract a similar audience,” they conclude.

 
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Three quarters of people with epilepsy in low-income countries are untreated

Health Policy Watch | Jun 29, 2019

Three quarters of people living with epilepsy in low-income countries do not get the treatment they need, increasing their risk of dying prematurely and condemning many to a life of stigma.

These findings are part of a first-ever global report on Epilepsy, a public health imperative, released today by WHO and two leading nongovernmental organizations for epilepsy, the International League Against Epilepsy and the International Bureau for Epilepsy.

“The treatment gap for epilepsy is unacceptably high, when we know that 70% of people with the condition can be seizure-free when they have access to medicines that can cost as little as US$5 per year and can be delivered through primary health systems,” said Dr Tarun Dua, from WHO’s Department of Mental Health and Substance Abuse.

Premature death is three times higher in people with epilepsy

Epilepsy, characterized by abnormal electrical activity causing seizures or unusual behaviour, sensations and sometimes loss of awareness, is one of the world’s most common neurological diseases, affecting nearly 50 million people of all ages around the world – with peaks among children and people over the age of 60.

Globally, the risk of premature death in people with epilepsy is up to three times higher than for the general population. In low- and middle-income countries, early death among people with epilepsy is significantly higher than in high-income countries. Reasons for this premature mortality in low- and middle-income countries are likely associated with lack of access to health facilities when seizures are long-lasting or occur close together without recovery in between, and preventable causes such as drowning, head injuries and burns.

Roughly half of adults with epilepsy have at least one other health condition. The most common are depression and anxiety: 23% of adults with epilepsy will experience clinical depression during their lifetime and 20% will have anxiety. Mental health conditions such as these can make seizures worse and reduce quality of life. Development and learning difficulties are experienced by 30-40% of children with epilepsy.

Stigma about the condition is also widespread. “The stigma associated with epilepsy is one of the main factors preventing people from seeking treatment,” said Dr Martin Brodie, President of the International Bureau for Epilepsy. “Many children with epilepsy do not go to school and adults are denied work, the right to drive and even to get married. These human rights violations experienced by people with epilepsy need to come to an end.”

Public information campaigns in schools, workplaces, and the broader community to help reduce stigma and the introduction of legislation to prevent discrimination and violations of human rights are also important elements of the public health response.

25% of epilepsy cases could be prevented

Causes of epilepsy include injury around the time of birth, traumatic brain injury, infections of the brain (such as meningitis or encephalitis) and stroke. It is estimated that 25% of cases can be prevented.

Effective interventions for prevention of epilepsy can be delivered as part of broader public health responses in maternal and newborn health care, communicable disease control, injury prevention and cardiovascular health. Screening for pregnancy complications and the presence of trained birth attendants can help prevent injury around the time of birth. Similarly, immunization against pneumonia and meningitis; malaria control programmes in endemic areas; initiatives to reduce road traffic injuries, violence and falls; and health and community interventions to prevent high blood pressure, diabetes, obesity and tobacco use can all help reduce epilepsy rates.

The report highlights that when the political will exists, the diagnosis of and treatment for epilepsy can be successfully integrated into primary health services. "Pilot programmes in Ghana, Mozambique, Myanmar and Viet Nam as part of WHO’s 'Reducing the epilepsy treatment gap' programme have led to a considerable increase in access, such that 6.5 million more people have access to treatment for epilepsy should they need it."

“We know how to reduce the epilepsy treatment gap. Now action to introduce the measures needed to make a difference needs to be accelerated,”
said Dr Samuel Wiebe, President of the International League Against Epilepsy. “Ensuring uninterrupted supply of access to anti-seizure medicines is one of the highest priorities, as is training of non-specialist health providers working in primary health-care centres.”

 
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Low dose CBD found to ease epileptic seizures

by Dennis Thompson

Less appears to be more when it comes to treating epilepsy with the marijuana extract cannabidiol, a new clinical trial suggests.

Patients taking a 10-milligram (mg) daily dose of pharmaceutical grade cannabidiol (CBD) experienced nearly as great a reduction in seizures as patients on 20 mg, and with fewer side effects, said lead researcher Dr. Orrin Devinsky. He is director of NYU Langone's Comprehensive Epilepsy Center in New York City.

"This is the third clinical trial to show that the cannabidiol medication Epidiolex is useful in treating two rare forms of epilepsy, Lennox-Gastaut syndrome and Dravet syndrome," Devinsky said.

An advisory panel for the U.S. Food and Drug Administration unanimously recommended in April that Epidiolex be approved for use in the United States. The FDA does not have to follow the recommendations of its advisory panels, but it typically does.

Epidiolex is manufactured by the British firm GW Pharmaceuticals, which funded the latest clinical trial.

"This is a historic moment in medicine," Devinsky said. "Hopefully, the FDA will approve this medication in their June meeting and cannabidiol will be available for children and adults with these two rare epilepsies."

Although CBD oil has become a trendy cure-all, treatment of epilepsy is the only use that has garnered significant scientific evidence supporting its usefulness.

This latest study is the first to compare two different doses of Epidiolex head-to-head and against an inactive placebo, Devinsky said.

A total of 225 patients suffering from Lennox-Gastaut syndrome were divided into three groups. Those taking 20 mg of Epidiolex a day had 42 percent fewer seizures, on average, compared with 37 percent fewer seizures in the group taking 10 mg of the drug, and a 17 percent reduction in the placebo group.

"But while the 20-mg dose was slightly more effective, it was not the first choice of parents," Devinsky said.

"When parents were asked to rate how their children did best, they actually had a slight preference for the 10-mg dose without knowing what it was," he added.

"That's because these kids did not experience as many side effects from the cannabidiol, which can include tiredness, decreased appetite, diarrhea and signs of possible liver damage," Devinsky explained.

"They got the vast majority of the benefits with fewer of the side effects," he said.

The study also showed that Epidiolex is a safe treatment, with only seven patients dropping out of the trial due to side effects -- six from the 20-mg group and one from the 10-mg group.

"Compared to other drugs used to treat epilepsy, I think Epidiolex, which is 99-percent pure cannabidiol, has a better side-effect profile than many of the available drugs," Devinsky said.

According to Dr. Angel Hernandez, of the Helen DeVos Children's Hospital in Grand Rapids, Mich., "these results prove that pharmaceutical-grade CBD helps suppress seizures and increases our options to treat many of these patients with very, very difficult-to-control epilepsies." Hernandez is division Chief of Neuroscience at the hospital.

"We're talking about types of epilepsy that are extremely difficult to treat with medication," he said. "Most of these children and adults do not respond to normal pharmacological treatment."

No one is exactly sure why CBD has this beneficial effect, both Devinsky and Hernandez said. It appears to work on receptors that alter brain chemistry in a way that reduces the chances of a seizure.

The doctors noted that these effects were seen in patients taking a highly refined form of CBD produced by a drug maker. It's not known whether patients in states where medical marijuana is legal would see the same effects in CBD oil produced by small companies with no federal oversight.

It's also not clear whether CBD would help people with more common forms of epilepsy. Devinsky said small clinical trials have so far found no benefit in people with focal epilepsy, where seizures start on one side of the brain.

"I think we need more studies," Devinsky said. "It's not been investigated in generalized epilepsy, and I think we need a larger study in focal epilepsy."

https://www.webmd.com/epilepsy/news/20180516/low-dose-of-cbd-oil-eases-epilepsy-seizures#2
 
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New 'brain pacemaker' may help treat epilepsy

Device fine-tunes treatment by stimulating and and recording electric current in the brain at the same time.

Scientists have developed a wireless device that can stimulate the brain with electric current, potentially delivering fine-tuned treatments to patients with diseases like epilepsy and Parkinson's.

The neurostimulator, named the WAND, works like a "pacemaker for the brain," monitoring the brain's electrical activity and delivering electrical stimulation if it detects something amiss, said researchers at the University of California, Berkeley in the US.

These devices can be extremely effective at preventing debilitating tremors or seizures in patients with a variety of neurological conditions, according to the study published in the journal Nature Biomedical Engineering.

However, the electrical signatures that precede a seizure or tremor can be extremely subtle, and the frequency and strength of electrical stimulation required to prevent them is equally touchy.

It can take years of small adjustments by doctors before the devices provide optimal treatment.

WAND, which stands for wireless artifact-free neuromodulation device, is both wireless and autonomous, meaning that once it learns to recognise the signs of tremor or seizure, it can adjust the stimulation parameters on its own to prevent the unwanted movements.

Since it is closed-loop - meaning it can stimulate and record simultaneously - the device can adjust these parameters in real-time.

Rikky Muller, Assistant Professor at University of California, Berkeley.

"The process of finding the right therapy for a patient is extremely costly and can take years. Significant reduction in both cost and duration can potentially lead to greatly improved outcomes and accessibility. We want to enable the device to figure out what is the best way to stimulate for a given patient to give the best outcomes. And you can only do that by listening and recording the neural signatures."

WAND can record electrical activity over 128 channels, or from 128 points in the brain, compared to eight channels in other closed-loop systems.

To demonstrate the device, the team used WAND to recognise and delay specific arm movements in rhesus macaques.

"Simultaneously stimulating and recording electrical signals in the brain is much like trying to see small ripples in a pond while also splashing your feet -- the electrical signals from the brain are overwhelmed by the large pulses of electricity delivered by the stimulation."

Currently, deep brain stimulators either stop recording while delivering the electrical stimulation, or record at a different part of the brain from where the stimulation is applied - essentially measuring the small ripples at a different point in the pond from the splashing.

"In order to deliver closed-loop stimulation-based therapies, which is a big goal for people treating Parkinson's and epilepsy and a variety of neurological disorders, it is very important to both perform neural recordings and stimulation simultaneously, which currently no single commercial device does," researchers said.

 
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