KCNQ2

KCNQ2

Novel KCNQ2 activators as promising drugs for epilepsy treatment

KCNQ2, news, research, therapies No comments
featured image

You have heard of Potiga, a drug used to treat KCNQ2-related epilepsy. But what about new drugs in development like SF0034 or RL648_81?  KCNQ2 Perspectives asked renowned pharmacologist and Jack Pribaz Foundation scientific adviser Dr. Maurizio Taglialatela to provide an overview of potassium channel openers. We are grateful for his help in understanding these drugs and offering a glimpse of what promising new treatments may lie on the horizon.

Precision medicine is an emerging approach for disease treatment and prevention that takes into account individual variability in genes, environment, and lifestyle. For genetic diseases such as most epileptic encephalopathies (EE), precision medicine aims to provide individually tailored treatments based the underlying genetic cause.

For KCNQ2-EE, molecular diagnosis may influence the choice of antiepileptic drugs. In fact, most of the genetic variants identified in KCNQ2-EE, when studied in vitro by conventional electrophysiological methods, cause a decrease in KCNQ2 channel function (loss-of-function or LOF variants). An antiepileptic drug which enhances KCNQ2 channel function may represent a novel therapeutic approach in those patients carrying LOF KCNQ2 variants.

Retigabine

Among currently available antiepileptic drugs, retigabine or ezogabine (trade name Trobalt or Potiga) is the only one whose clinical efficacy is related to this specific mechanism of action. Unfortunately, although retigabine is approved for use in adults with epilepsy, its use in infants and children is very limited. Moreover, post-marketing studies revealed the occurrence of side effects with retigabine, including a blue discoloration of the skin and mucosae and pigment deposition in the retina. It is yet unknown whether this latter effect, which appears as a consequence of the drug’s photodegradation and oxidation upon exposure to UV radiations, affects vision in the long term. Another side effect occurring with retigabine is urinary retention, possibly a consequence of the poor selectivity of retigabine/ezogabine for KCNQ2 channels over channels of the same subfamily (particularly KCNQ4), which do not appear to play a significant role in epilepsy, but which are involved in the control of bladder smooth muscle contractility.

SF0034

To improve retigabine safety and selectivity, in the last few years, several research groups have synthesized and characterized the pharmacological properties of a large number of retigabine analogs (as well as other KCNQ2 activators structurally unrelated to retigabine). Among the novel molecules resulting from these efforts is SF0034, a compound which, when compared to retigabine, is more potent and KCNQ2-selective (Kalappa et al., 2015). Preclinical studies in animals also revealed that SF0034 exhibits a more potent anticonvulsant activity and less toxicity than retigabine. In addition, SF0034 was significantly less active on KCNQ4 channels, leading to the suggestion that, in comparison with retigabine, side effects associated with activation of this channel subtype may be less likely to occur with SF0034. SF0034 seems to be more chemically stable and does not produce blue metabolites, suggesting that it may be a useful clinical candidate for epilepsy and other diseases linked to KCNQ2 hypofunction (such as tinnitus).

RL648_81

Even more recently, another analogue of retigabine, named RL648_81, has been reported in the literature (Kumar et al., 2016); this compound is 3 times more potent than SF0034 and 15 times more potent than retigabine in activating KCNQ2 channels in in vitro electrophysiological studies. The same studies also revealed that RL648_81 is also more selective than retigabine for activation of KCNQ2 channel over channels formed by other KCNQ subtypes. However, no pharmacokinetic data on drug absorption, metabolism, distribution and elimination from the organism is yet available for RL648_81 (either in experimental animals or in humans), and no antiepileptic efficacy has been proven for this drug in preclinical or clinical studies. Nonetheless, it seems likely that this more potent, selective and chemically stable KCNQ2/3 activator may be yet another attractive candidate for treating or preventing hyperexcitability disorders, overcoming some of the undesirable side effects associated with retigabine.

Donate to The Jack Pribaz Foundation to help fund research on KCNQ2 treatments

In conclusion, based on the discovery that KCNQ2 channels play critical roles in epilepsy pathogenesis and treatment, both academic and industry efforts are being actively pursued to develop novel KCNQ2 activators. Whether these novel drugs will prove useful as targeted therapies to improve neonatal seizures and developmental outcome in neonates with KCNQ2-EE remains to be demonstrated in the years to come.

References

Screenshot 2016-05-07 10.52.10Born in Naples, Italy, Dr. Maurizio Taglialatela, MD, PhD, is a full professor of pharmacology at the University of Molise in Italy, where he was Dean of the Faculty of Health Science from 2005-2012. He earned both his Medical Degree and PhD in Cellular and Molecular Biology and Pathology from the University of Naples. At the University of Molise he serves as the scientific director of the Center for Pharmacovigilance of the Regione Molise, the chairman of the Center for Higher Education of Public and Private Management of the University of Molise, and the coordinator of the PhD Program in Translational and Clinical Medicine. Dr. Taglialatela has contributed to numerous international research committees for pharmaceutical drug development.  In the last fifteen years, he has dedicated most of his efforts to investigate the molecular pathogenetic mechanisms responsible for neuronal channelopathies, concentrating on developing experimental tools and drugs to investigate the structure-function analysis of disease-causing human mutations found in human KCNQ channel genes, in order to indentify in-vitro biomarkers useful for disease diagnosis, prognosis, and therapy.

KCNQ2 wins at the Toronto TIFF kids film festival

advocacy, connections, KCNQ2, KCNQ2 No comments
featured image

McIntyre says “these kids’ lives matter”

What does life with KCNQ2-related epilepsy look like?

To a researcher, it’s a miscoded ion channel in the brain. For a neonatal doctor or epileptologist, it might look like a chaotic EEG you must explain to anguished parents. Ask those parents what life with KCNQ2-related epilepsy looks like, and you’ll get a thousand answers–and even more questions.

But what does KCNQ2-related epilepsy look like through the eyes of a sibling?

“Owen and Rhys are as typical as any brothers can be,” says mom Natalie. “They love each other and are best friends.”

Nine-year-old Owen McIntyre has shown the world. His short film, “My Life with My Brother Rhys,” was selected as a finalist and was screened on April 24 at the 2016 TIFF kids International Film Festival in Toronto. Owen was also one of three kids up for the “filmpossible” award offered through Holland Bloorview Kids Rehabilitation Hospital in Toronto. Rhys has KCNQ2 encephalopathy.

“I want to make people understand what this gene mutation is about. That’s what I care about,” says the first-time filmmaker. “I want people to feel—to know that these kids’ lives matter.”

 

Big night

Owen accomplished that goal last night just by participating in the event. But even more exciting, the film won the filmpossible award, plus a trophy and $500! His mom Natalie Boese says that after accepting his prize, Owen returned to his seat “very emotional and had tears of joy.”

“I’m happy!” says Owen.  “I feel lucky that I won this award because I am helping out Jack’s Army and all of Rhys’ KCNQ2 army. I am going to keep making movies to spread more information about KCNQ2.”

IMG_1881

Owen accepts his award on stage, with Rhys’s image beaming overhead.

“We would like to congratulate Owen McIntyre on winning the filmpossible award,” said Stewart Wong, vice president, communications, marketing and advocacy for Holland Bloorview. “Our Children’s Advisory Council selected the winner, and many of the members said they could relate to the sibling relationship and thought Owen did a great job providing insight into his and his family’s day-to-day life.”

When asked how she felt watching her boys last night, Natalie said, “Owen was up on stage at TIFF supporting his little brother in the best way he knew how. Rhys is always there pushing Owen to think differently and creates continued compassion, compassion in a way that may have never been explored had Rhys not been born.”

Desire to make a difference

Owen’s film grew out of a school project undertaken by the fourth graders at his school. For his topic, Owen chose to learn all he could about the KCNQ2-related epilepsy that affects his brother, and by extension, his own life.

Toronto’s CBC's Metro Morning radio show host interviewed the young producer/director and mom Natalie.

Toronto’s CBC’s Metro Morning radio show host interviewed the young producer/director and his mom.

For the assignment, the students had to research their topic and conduct an interview. Owen found www.KCNQ2.org and called to talk with Mike Pribaz, The Jack Pribaz Foundation (aka “Jack’s Army”) president and Jack’s dad. Mike remembers Owen’s “very young but very confident” voice on the phone last fall.

“Owen is exactly the kind of brother that KCNQ2 kids need,” Mike says. “He is thoughtful and invested in the future of his own brother as well as the future of all these kids. We need professionals and parents to spread awareness, but it is amazing to see such a bright young man do the same.”

 

Subcribe to KCNQ2 Perspectives blog

“Bring visibility to disability”

Owen notices the looks that his brother gets from strangers. “When people see kids with disabilities their jaw drops when they don’t understand. I want people to understand,” he says. “I want people to smile normally.”

Anyone who watches Owen’s film can’t help but smile. It invites viewers to share a day of his life with a KCNQ2 sibling. While Rhys’s challenges are apparent, the film celebrates Rhys and radiates the love between brothers with tenderness and humor.

That’s exactly what the film festival is looking to accomplish. “Holland Bloorview Kids Rehabilitation Hospital is excited to partner with TIFF Kids International Film Festival this year to present our fifth annual filmpossible award, which recognizes young filmmakers who bring visibility to disability,” says Wong. “All of the filmpossible finalists this year did an amazing job giving us a window into their lives and helping us experience what they see and hear and feel every day. By sharing their joys and struggles, these very talented young filmmakers are helping to break down stereotypes and encourage compassion and understanding.”

“I want people to feel—to know that these kids’ lives matter.”–O.M.

Perhaps Owen gets his eye for beautiful images from his mom, who had this to say about her boys:

“We believed at first Rhys was at first our little turtle, slow and steady and coming along. As he grew up he became our unicorn, even compared to his KCNQ2 friends he is so unique– no one has the same gene sequence as he. He is as special and beautiful as they come. Both of my boys make me proud every day because of the way they view life, not so much in the awards and milestones they achieve.”

Specialness of siblings

Brothers sharing a good laugh.

Brothers sharing a good laugh.

Owen believes that being Rhys’ sibling puts him in a unique position, in some ways closer to Rhys than anyone else. “Parents don’t understand as much as siblings do,” Owen says. “Siblings have a connection.” He explained that being Rhys’s brother means he naturally treats him as an equal.

Although he admits they don’t quite fight like brothers usually do (“the gene mutation sort of pauses that,” he explains), he knows that his brother is engaged with him and has opinions and preferences all his own. Owen says Rhys definitely “has something to say back!”

Wrestling with big questions

Mcintyre bros in carOwen faces down some profound questions when he thinks about his brother’s future. He understands that science takes time, maybe a long time, to come up with the kind of treatment that will help Rhys. He’s “not so happy” about that.

But he also knows that there are people helping. And he wants to be one of them. He hopes his film will move people to learn more about KCNQ2. “You’ve got to care,” he says. “You’ve got to feel it.”

Click here to donate to The Jack Pribaz Foundation. Help raise awareness and fund research to help kids like Rhys all over the world.

 

 

Believing in you and KCNQ2

connections, foundation news, KCNQ2 No comments
featured image
“Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it’s the only thing that ever has.” –Margaret Mead

 

 

IMG_3548-1
“I believe that if you show people the problems and you show them the solutions, they will be moved to act.” –Bill Gates

Heart to Heart

Last weekend we came together with a small group of the many people who have been with us since we launched this foundation five years ago, plus newer friends who have strengthened our ranks. If your ears were ringing it’s because we were talking about YOU—all of you from all over the world who have been a part of this KCNQ2 movement in one way or another—as family member of a KCNQ2 kid, as doctor, as researcher, as supporter, as cheerleader, as friend.

donor dinner mike with guests
“The future belongs to those who believe in the beauty of their dreams.” –Eleanor Roosevelt

We are so grateful for your support.

You are among the first who believed in the bold notion that we could make a difference. You believed, like Mike and Liz and Jack’s doctors did, that with funding and research KCNQ2 would reveal its secrets. And it is. You believed that sharing this journey meant we could find other kids and help them and their families. And we have. You believed this thing was bigger than any of us. And is it ever.

 

Look how far we’ve come

With special thanks to the many researchers and clinicians who dedicate their time and talent to groundbreaking work on KCNQ2-related epilepsy, the greater KCNQ2 community is in a totally different place than when we started five years ago.

Basic understanding of the disease is advancing
In 2012 the molecular mechanism of the disease was only a hypothesis (Millichap and Cooper)–most frequently a “dominant-negative” loss of function. Now it is accepted as applicable to the large majority of patients (about 90%).

Treatment of the seizures in infancy is advancing
We now have evidence of the effectiveness of two treatments: a potassium channel opener (Park AES abstract 2014, manuscript in review) and of sodium channel blockers (Pisano 2015).

We have a deeper understanding of the diversity within the “KCNQ2 spectrum”
–In terms of the patient population and their symptoms: there are two types that have onsets without neonatal seizures, and one with inheritance from a parent who is mildly affected (Millichap, Li, and Mulkey posters, AES 2015)
–In terms of the molecular basis of disease: important subgroups of patients (~10%) have been identified where the molecular mechanism is quite different “gain (not loss) of function” (Miceli 2015, Millichap poster 2015)

Donor dinner 4 docs

CWoW teammates Drs. Anne Berg (NU), Ed Cooper (Baylor), Al George (NU), and John Millichap (NU)

We have cultivated broad agreement to collaborate among international leaders as a method for hastening progress
This is so fundamental to the creation of RIKEE.org and the process of writing the CWoW grant application in 2016. The network has an inspiring depth and breadth,  spanning four continents.

We are attracting the attention of pharmaceutical companies
Emerging interactions with drug developers who have the resources will provide new treatment candidates for testing (SciFluor).

 

Thanks to you

This is just a sampling of the excellent progress being made since we set out five years ago. Thanks to ALL OF YOU, we’ve covered a remarkable amount of ground in a relatively short amount of time. Even so, Dr. Cooper noted that “science is never fast enough” when it comes to caring for kids who need it most. We know we have a long way to go, but we are getting there.

So thank you. Thanks for believing in us, in the power of collaboration, and in all the kids who are the true pioneers in this KCNQ2 movement.

OLYMPUS DIGITAL CAMERA

“It’s not how much we give, but how much love we put into giving.”–Blessed Mother Teresa of Calcutta.

 

Click here to make a secure online donation  through PayPal to benefit KCNQ2 research.

Oliver’s Story: an Update

Tags: KCNQ2, KCNQ2 Journeys, research No comments
featured image

Warm thanks to Tanya and John for sending this update to their son Oliver’s story, which first appeared many moons ago on the original Jack’s Army website and which now resides in the KCNQ2.org Stories section. It is so helpful to be able to revisit the “vintage” stories, celebrate progress, and learn from challenges. Sharing stories is a powerful way the entire KCNQ2 community can lift one another up and enlighten researchers and clinicians about the daily realities of living with KCNQ2-related epilepsy.

Our sweet little Oliver is now four years old, two and a half years after diagnosis of KCNQ2 at the age of 17 months. On the whole, Oliver is non-verbal; however, he teaches us how to communicate with him on a daily basis, such as using his eyes and his hands when he wants something!

Physically he is doing an awesome job. He can run, jump, and climb. However, he does tend to walk on all fours, which is a typical autistic trait.

Currently he attends a special school with two to three other children in his class. He goes there one day per week.  He also attends a mainstream Kindy five days a fortnight. There he has his own special needs assistant looking after him. He certainly keeps her on her toes! The children have been taught about autism and his epilepsy. This was brought on by Oliver and his love for opening doors and gates. His way of communicating is taking your hand (any hand, even a complete stranger’s!) and leading you to where and what he wants. Because this was becoming an issue, we sent out letters to other parents in the school group (about 20 in all) about autism and KCNQ2. We have been given positive feedback. One person has even asked about more information, which is very exciting.

“Our KCNQ2 community is built on friendship, common goals, and empathy.” –TG and JG

Since Oliver’s diagnosis, things have been on the move. Sometimes up, sometimes down. On the seizure front, he has had 3 seizures in the past 3 years. Not bad, but one seizure is one too many. We were weaning his main AED [anti-epileptic drug] just recently. After two days of completely being off it, he had a seven-minute seizure. After advice from his neurologist, we restarted the medicine. That has been disappointing as we wanted to see what his personality and cognitive development would be affected without any.

Oliver at restaurant

He is also been receiving additional therapies such as speech and occupational therapy. They are slowly making inroads with his communication skills.

Oliver is also doing great with his personal care. A couple of years ago, the thought of having his hair washed was exhausting.  Now he loves the water and having his hair washed is a lot easier! At times he can help getting dressed. We need to help him a lot, but it is a step in the right direction.

I think parents need to listen to other parents about KCNQ2. Tell us your story. Every time I tell Oliver’s story to friends, doctors, etc, I feel as though I am educating them through our experiences. Unfortunately there isn’t a lot known about it in general medical circles. Education is all about experiences. For example, when Oliver was brought in to the emergency department after his last seizure, an emergency consultant asked what it was! Unfortunately, this is a reoccurring theme.

The other thing I would suggest is collaboration is the key. Talk to all of your child’s healthcare providers so they can collaborate the best that they can for your child.

RIKEE is a KCNQ2-specific patient registry that is powering international research on this condition. Join the effort! Register your child or patient in RIKEE.

The most important thing is to hug and love your child. Our KCNQ2 community is built on friendship, common goals, and empathy. We are the only ones in the world that exactly know what you are going through. Never be afraid to ask or share. We are here for our children and our community.

Read about John’s KCNQ2 Journey with BFNE published here in February.

Oliver’s original story

oliver_300x300Oliver was born in February 2012 through an elective caesarean section. On day two of life, while he was breast feeding, Oliver broke attachment and started staring and all four limbs were twitching. The next day, he had two tonic clonic seizures lasting about 45 secs each time. He was then transferred into the hospital’s special care nursery. There he had numerous tests including a lumbar puncture, MRI, ultrasounds and many blood tests. All of these tests came back normal. A week later, he was transferred to a larger hospital for extensive and specialised testing, including a few EEG’s.

Over the next couple of months he had numerous hospital admissions due to increase seizure activity and the inability of his medications to keep up with them. After his scheduled four-month vaccinations, he had his longest seizures to date. A seven-minute seizure at home, an eight-minute seizure at hospital, then had a 45-minute status and transferred to the Intensive Care Unit. It was after that enormous seizure that his neurologist decided to do genetic testing. After a couple of days, he was fine and sent home.

Over the next four to six months, his hospital admissions due to seizure activity were getting less. However, he was not putting on any weight, his appetite decreased, and it got to a stage where his output was getting less and less. His doctor decided to do some blood tests. His electrolytes were at a critical level and with consultation with a metabolic doctor, decided it was his current anti-epileptic drug was the root cause of this. We changed medications immediately.

In July 2013, we discovered that Oliver was diagnosed with the KCNQ2 gene mutation, the cause of his epilepsy. Through the internet, we have discovered many families that are affected by this and have been a tower of strength for all of us.

At 22 months of age, he had been seizure free for 10 months and is physically growing well. Developmentally he is quite behind children of a similar age. He started walking at 19 months of age. Still quite non-verbal, and it is like he is in his own little world. He has had a recent diagnosis of autism; fortunately, he is on the lower end of the spectrum. He receives regular physical therapies through occupational therapists, physiotherapists and speech pathologists. Because there isn’t much known about KCNQ2, the doctors are learning as we are learning. We continue to support his needs and whatever he requires. We take it day by day and try to live life as best we can.

Share your KCNQ2 journey here to help raise awareness of KCNQ2-related epilepsy.

New diagnosis of KCNQ2-related epilepsy?

genetics, KCNQ2, research No comments
featured image

Seven questions to ask a genetic counselor

(Updated 3/20/17)

Boston genetic counselor Lacey Smith, MS, CGC, shares the most common questions she hears from families.

I have been a genetic counselor in the Epilepsy Genetics Program at Boston Children’s Hospital for about three  years.  During my time here, I have met with many families who have received a genetic diagnosis for their child’s epilepsy, including KCNQ2-related epilepsy. Getting such a diagnosis can be overwhelming for families, as there is often a lot of information coming in at once. My hope is to provide you with answers to some of the questions I am most often asked by families when they first hear that their child has KCNQ2-related epilepsy. Even though your child has this diagnosis, each individual is unique so your experiences may be different from those of other families you may have met who also have a child with KCNQ2-related epilepsy.

The spectrum of features associated with KCNQ2-related epilepsy is quite vast and the genetics aspect is often unique to each family, so my answers may be a little vague and may not touch upon your specific needs or experiences.  As such, I am also providing suggestions of whom to contact to gather additional information specific to your child.  You can also use this information as a guide in coming up with questions to ask your child’s neurologist.

 

What does a diagnosis of “KCNQ2-related epilepsy” mean?

This means that your child has an alteration (also called a “variant”) in a gene called KCNQ2, and that variant has likely caused your child to develop seizures or epilepsy.  It may also explain any developmental challenges your child may have.

Knowing the underlying genetic cause of your child’s epilepsy could be beneficial in a number of ways.  First of all, it provides an answer or a reason as to why your child developed seizures.  Having a diagnosis can allow your child’s doctor to provide you with more information regarding prognosis and potential treatment options than they would have been able to without knowing the underlying cause.  It can prevent your child from undergoing additional unnecessary tests to rule out other conditions or medical complications. It can provide insight into family history if there are any other family members who have/had seizures and it can provide information regarding the likelihood of having another child with similar symptoms.

Click here for a handy infographic on the basics of KCNQ2

What does this diagnosis mean for my child’s prognosis?

Knowing that your child has a variation in the KCNQ2 gene can allow your child’s doctor to have a better idea of how your child’s symptoms may progress over time, based on what is already known about other children who have KCNQ2-related epilepsy.  There are two general categories of symptoms. Children usually fall somewhere along a spectrum from Benign Familial Neonatal Epilepsy (BFNE) on the mild end to an epileptic encephalopathy.  In the world of epilepsy, “benign” usually means that seizures are expected to resolve over time or the child may “grow out” of their seizures.   An epileptic encephalopathy is a term that is used when a child has seizures, and in addition, the electrical activity of the brain both during and between seizures can also cause developmental delays and cognitive challenges.

So how does one know where along the spectrum their child will be?  Unfortunately, this is difficult to know.  Currently, this isn’t enough information available to predict exactly what symptoms a child will develop based solely on the results of the genetic test.  Even among individuals who have the same KCNQ2 variant, each individual can have different symptoms. There are likely other factors (such as other genes) that are modifying the effects of the KCNQ2 variation.  Researchers are trying to learn more about these contributing factors.  In the meantime, your child is going to tell his or her own story.  Most often, the best predictor for how your child will do is how your child has done/is doing.  This can be difficult when the diagnosis comes at a very young age and there is little developmental history to look back on.

…your child is going to tell his or her own story. –LS

Over time, researchers will hopefully gain a better understanding of features associated KCNQ2-related epilepsy.   By gathering information from many individuals who have been diagnosed, they can begin to analyze patterns including the spectrum of symptoms and look for any associated modifiers to be able to better predict a child’s prognosis.  One of the ways in which researchers can collect this information is through a patient registry.  A registry gathers and keeps information about people who have a certain condition to support and encourage research into that condition.  Individuals may sign up or enroll in a patient registry to have their information included and available to researchers.  The RIKEE Project is one patient registry that is targeted specifically to KCNQ2-related epilepsy.

Register your child in RIKEE to connect with the international team of KCNQ2 researchers and advance understanding of KCNQ2-related epilepsy.

rikee logo new

How does this diagnosis affect management/treatment for my child?

This diagnosis may not lead to a drastic change in management.  For example, if your child has been experiencing some delays in development and has been receiving services to help with development, then he or she would continue to receive those services.  If your child is on target for all milestones, then you will know to be on the lookout for any delays moving forward and intervene right away with evaluations and/or services if needed.

You may find that your child’s doctor may not recommend any medication changes based on this diagnosis, especially if your child’s seizures are well-controlled. Targeted treatments for genetic forms of epilepsy is a very big topic in research right now– being able to treat the exact cause of seizures based on the underlying genetic cause is on the horizon and new advancements are happening quite frequently. This is true for KCNQ2-related epilepsy. Because the field is evolving so rapidly, it is best to discuss medication management with your child’s doctor in order to have the most up-to- date information.

If this is “genetic,” does it mean that one of us parents passed this on to our child?

Not necessarily.  Just because a condition is considered “genetic” does not necessarily mean it was inherited.  Genetic variations can be passed through families, or these variations can arise for the first time in a child (these are called “de novo” variants).  De novo variants are likely produced by a spontaneous event during the formation of the sperm or the egg cell.  Some individuals can have the KCNQ2 variant but never develop any symptoms, so it is possible for a child to inherit the variant from a seemingly unaffected parent.  You can determine whether your child has an inherited variant or a de novo variant by testing both parents.  Your child’s doctor can help facilitate such testing.

 

kidonshoulders

What does this mean for my other child/children?  Can I test them?

If you have another child who also has seizures, then it is possible that they could also have the same KCNQ2 variant and it would be possible for this child to have genetic testing.  In general, it is not routinely recommended that unaffected children (children who do not show any features of the condition) undergo testing.  Rather, that child could make the decision to undergo testing on their own when they are of suitable age.

 

What are the chances of having another child with this condition?  Can I reduce the chances?

The likelihood of having another child that has the KCNQ2 variant depends on whether this was an inherited variant or a de novo variant.  If the KCNQ2 variant was inherited from a parent, then there would be a 50% (1 in 2) chance that each conception would also inherit the KCNQ2 variant.  If the KCNQ2 variant was de novo, then the chances are much smaller although not zero.  This is because there is some residual chance to have another child with the same variant due to something called “gonadal mosaicism.”  Gonadal mosaicism is not something that is routinely tested for in the clinical setting. For some families, during the parental testing process, the KCNQ2 variant is detected in some, but not all, of the cells in one of the parents. This is another form of mosaicism. For those families, it is also possible for future pregnancies to also have the KCNQ2 variant.

Regardless of inheritance of the variant it is possible to test future pregnancies to see if the KCNQ2 variant is present. For more information regarding prenatal testing options, you can speak with a genetics specialist when you are considering having additional children.

It is also important to remember that individuals with KCNQ2 variants or KCNQ2-related epilepsy may show different symptoms, even when they have the same variant.  While it is possible to test pregnancies for the KCNQ2 variant, one cannot predict with certainty the severity of symptoms an individual may present with.  Future children who have the KCNQ2 variant may have symptoms that are less severe or more severe than those of your child.

 

Who else can I talk to?

It is important to find a neurologist or epileptologist with whom you/your child feel comfortable.  Don’t be afraid to ask for a second opinion, or more!  If you have concerns regarding your child’s development, you could have your child evaluated by a neuropsychologist.  A neuropsychologist is a doctor who, through a series of tests, can identify your child’s strengths and weaknesses in learning, emotions and behavior.  From there, recommendations for services specific to your child’s needs can be made.

It may be helpful to speak with someone who has specific training with genetic conditions, whether it be specifically genetic forms of epilepsy or more general genetic conditions.  This could be a geneticist and/or a genetic counselor.  Healthcare providers who are specially trained in genetics can provide information regarding inheritance patterns, identifying family members who could be tested and options for testing future pregnancies, if desired.  You may consider asking your child’s doctor to refer you to a genetics specialist in your area.  You or your child’s provider can also find a genetic counselor through the National Society of Genetic Counselors website at www.NSGC.org, and navigate to the “Find a Genetic Counselor” link.  You can identify genetic counselors in your area and genetic counselors that specialize in epilepsy or neurogenetics.

Lacey Smith, MS, CGC

Lacey Smith, MS, CGC

Lacey Smith, MS, CGC, is a genetic counselor in the Epilepsy Genetics Program at Boston Children’s Hospital.  She has roles in both the clinic and in research.  In the clinic, she works closely with epileptologists in meeting with children who either have, or are presumed to have, a genetic form of epilepsy.  She reviews all aspects of genetic testing, discusses potential implications for other family members and future children, and helps families understand their child’s diagnosis.  In the research world, her team is trying to better understand the genetic contributions to epilepsy.  Specifically, they are trying to identify new genes associated with epilepsy, determine how variations in these genes cause epilepsy, and develop more targeted therapies for children who have epilepsy caused by variations in these genes. Lacey is also a member of EpiGC, a consortium of genetic counselors whose mission is to promote access to quality genetics services for patients and families affected by epilepsy through research, public policy/advocacy, education and outreach activities.

Into the Epilepsiome: An interview with Dr. Ingo Helbig

connections, genetics, KCNQ2, research No comments
featured image

By all accounts, KCNQ2 is getting serious attention. On New Year’s Eve 2015, Dr. Ingo Helbig, one of the authors of the blog Beyond the Ion Channel, recapped his top ten posts for the year (hopefully while wearing a party hat and sipping a little bubbly). KCNQ2 came in at #10, and he wrote that KCNQ2 “may be the most common genetic cause of neonatal epileptic encephalopathies.” For any family who has ever felt alone with a KCNQ2 diagnosis, that’s a pretty incredible thing to read. It spurred me to ask for Dr. Helbig’s perspective for KCNQ2 Perspectives, and he has graciously obliged.

 

You have invented this new term, Epilepsiome. Please tell us what the Epilepsiome is and how researchers and clinicians can use it.

The Epilepsiome is the community-based gene curation effort of the epilepsy world. Basically, the Epilepsiome project aims to review and curate data on all relevant epilepsy genes, especially involving scientists and clinicians who work on the particular genes. The goal is to provide you with an up-to-date overview that will then link out to the other resource such as ClinGen, ClinVar, GeneReviews, or OMIM. However, in contrast to these resources (which are used widely in genetic studies), the Epilepsiome will have a clear focus on epilepsy and will put the current findings and controversies into context. My vision was to carry some blogging atmosphere over to a gene curation project, which typically engages the community more than a static page that is only updated infrequently.

The Epilepsiome is growing. We are building expert groups for particular genes and we are very fortunate to have a dedicated group of scientists and clinicians on board to add to our gene curation. We aim to have the main genes for genetic epilepsies reviewed in 2016–and yes, there is already a KCNQ2 page maintained by some of the experts in the field that are part of your community.

In your New Year’s Eve 2015 post you wrote: “In many ways, KCNQ2 is one of our model genetic diseases, with a tightly connected group of researchers, clinicians, and patient organization. We hope that we can spin this energy into novel approaches for precision medicine soon.” Can you tell our readers what you mean by precision medicine and how the KCNQ2 community might be able to contribute to, or benefit from, it?

I knew that you would pick up on this! I must say that I am really impressed by the KCNQ2 community, which connects families, clinicians, and researchers. The vision of precision medicine is to use our knowledge of the genetic causes to find custom treatments, which may either be known medications that we did not think of yet or new compounds that were designed for specific disorders.

JPF booth at AES in Philadelphia. KCNQ2 famlies sent in #WeAreKCNQ2 videos to demonstrate their spirit and unity to the research community. Pictured: Liz Pribaz, Jim Thompson, Dr. John Millichap. View the #WeAreKCNQ2 video on our YouTube channel.

JPF booth at AES in Philadelphia. KCNQ2 families sent in #WeAreKCNQ2 videos to demonstrate their spirit and unity to the research community. Pictured: in video, baby Parker and family; Liz Pribaz, Jim Thompson, Dr. John Millichap. View the #WeAreKCNQ2 video on our YouTube channel.

We feel that this approach may be promising as we are facing two fundamental problems in many severe epilepsies. First, seizures in these epilepsies are often difficult to treat and secondly, other than controlling seizures, our treatment strategies often have little impact on the developmental outcome. Precision medicine or personalized medicine aims to identify the cause of the epilepsy first. For patients with KCNQ2 encephalopathy, this is often a mutation that renders the potassium channel non-functional. The idea of precision medicine is to find model systems that replicate this defect and then systematically search for compounds that may correct it. A closely-knit community as the KCNQ2 community will be required to make sure that future treatment options can quickly be translated to clinical trials. Many people underestimate the efforts of finding patients with rare diseases for trials, and I feel that having the community organized is a prerequisite for this.

A closely-knit community as the KCNQ2 community will be required to make sure that future treatment options can quickly be translated to clinical trials.–IH

 

For parents of children suffering seizures and other effects of a genetic mutation, no science can ever move fast enough to find a cure or better treatment. What does that timeline for precision medicine advances look like?

Unfortunately, it is difficult to provide timelines for this. In many aspects, we are still not at the stage yet where generating model systems and testing of a wide range of possible candidate drugs is a predictable pipeline. Having said this, there is considerable effort dedicated towards finding therapies for patients with ion channel diseases.

There is one additional aspect to treatment of genetic epilepsies that I would like to mention at this point. You mentioned the word “cure.” While both families and clinicians often expect the scientific community to come up with game-changing interventions that significantly alter the course of the disease, a different strategy is to systematically focus on exploiting small gains in the field.

Take the pediatric leukemia field as an example. Even though many individual chemotherapy and radiation therapies have increased survival, it was only the thoughtful combination of therapies and systematic adaptation of protocols based on prior experience that has led to the significant increase in cure rates that we see today. Translating this to genetic epilepsies, I feel that we already can learn a lot from existing experience, but access to that data, how best to aggregate it while protecting patient privacy, and the possibility to mine this information are major issues.

 

BeyondIonChannelBlog

Until recently, public discussion of scientific ideas was the purview of peer reviewed articles and books. The internet, and especially blogs like Beyond the Ion Channel, have created new space for sharing ideas and debate. As a scientist-blogger, what do you see as the benefits and risks of these new public platforms?

Basically, these public platforms serve as the communication backbone of communities that are not represented in the traditional publishing format. The main benefit of these platforms is that they provide a “running commentary” on what is happening in the area; they help put novel and existing information into context. I have always felt that we are piecing together the puzzle of an ongoing mystery, the genetic architecture of a disease. And we are trying not only to look at whether the pieces fit, but also to present the bigger picture on what they contribute. Another big advantage of these platforms is the fact that they are updated regularly in small increments as they follow the rhythm of social media. This is different to the traditional format where only the final product is presented. Through these platforms, we are able to follow the thought process and generation of ideas, which gives us the possibility to interact and contribute. Finally, I have also felt the effects of blogging personally. It is a way for me to clear my mind and experiment with novel ideas. It’s the thing that keeps me up at 3AM.

With regards to risks, especially for online platforms that develop a certain authority in a healthcare-related area such as the rare disease space, you have to be very careful that the information on treatment and prognosis that you provide is solid and agreed upon by the community. We are currently in the process of adding a “Personalized Medicine” subsection for our gene reviews and have the discussion in the community on what constitutes reliable information that can be displayed in this section. This is particularly difficult given the publication lag in this field–there is much knowledge and experience in the community that is unpublished and representing this adequately remains a challenge.

 

How did you first become interested in the study of genetic epilepsies?

During my medical doctoral thesis in Heidelberg, Germany, I worked on neuronal gap junctions or “electrical synapses,” direct cell-to-cell connections between neurons. This type of communication between nerve cells had been forgotten for a long time, but was rediscovered in the early 2000s, and we characterized the proteins that were involved. At one point, we speculated that mice deficient in one of the critical proteins called Connexin 36 may have a reduced threshold for seizures, as this protein was thought to enhance the connection between so-called inhibitory cells (neurons that are typically involved in reducing the activity of other neurons).

We could not validate this hypothesis and actually found the opposite. We also tried to assess whether variants in this gene may predispose to epilepsy, but there was nothing to be found. Independent of my disappointment, this started my interest in genes that predispose to epilepsy and also left me with a fundamental skepticism of falling in love with any particular hypothesis too much. On our blog, I am often referring to the power of team science and hypothesis-free approaches in genetics, which is somewhat a reference to my earlier disappointments.

Independent of my disappointment, this started my interest in genes that predispose to epilepsy and also left me with a fundamental skepticism of falling in love with any particular hypothesis too much.–IH

My other “key moment” happened during a trip to Australia when I interviewed for positions in various fields, some of which did not include epilepsy at all. As I mentioned in a post last year, I was sitting in a rock pool at Red Johanna Beach in Victoria, Australia, reading Nigel Tan’s “The truth is out there,” a 2004 review on the state of association studies in epilepsy. The writing style and big picture view of his review made me realize that epilepsy genetics is something that I might actually be interested in. I typically publish a post “Red Johanna Day” every year, which I consider my birthday in epilepsy genetics.

These two stories were my early beginnings. In retrospect, I think it is interesting how my strong clinical interest in genetic epilepsies was born out of a primarily scientific interest. The clinical part was something that I learned and became fully invested in while getting involved in patient care. To me, being a clinician and a scientist is an interesting combination that allows me have both the care of the individual patient and the larger picture in mind.

Have you registered your child or patient in the KCNQ2 patient registry? Access RIKEE here to help the KCNQ2 community.

 

Dr. Ingo Helbig

Dr. Ingo Helbig

Ingo Helbig, MD, is a member of the Genetics Commission of the International League Against Epilepsy (ILAE) and epilepsy genetics researcher. Ingo trained as a pediatrician and child neurologist at the Department of Neuropediatrics, Kiel, Germany, and is currently a child neurology fellow in the Division of Neurology at the Children’s Hospital of Philadelphia. His research group has contributed to many of the recent gene finding in human epilepsies. Ingo blogs about epilepsy and genes on Beyond the Ion Channel.

John’s Story: KCNQ2 complexities

KCNQ2, KCNQ2, KCNQ2 Journeys, research No comments
featured image

KCNQ2 in the family

Sheila M. sent us the story of her son John, a three-year-old with an inherited KCNQ2 mutation. We thank her for sharing her family’s journey, which highlights how complex KCNQ2 epilepsy is—reflecting a complicated set of genetic and environmental factors that can result in different outcomes, even among family members with the same variant. By sharing stories and registering in the RIKEE patient registry, parents can equip researchers to better study these complexities.

John was born November 16, 2012. At 36 hours of life and at home (we had been released from the hospital) John began having tonic clonic seizures. He was in the NICU at the Montreal Children’s Hospital for a month and was released on four medications. At three months old he had more seizures that could not be controlled and was apneic. He was in the PICU for a month again, and released with four medications, with Phenobarbitol being one of them.

Read more about KCNQ2-related disorders–the inherited and the de novo forms.

One-month-old John

One-month-old John

After that his seizures were less frequent, febrile in nature, and closely associated with his vaccinations, but were overall controlled by medication. We were diagnosed with Benign Neonatal Familial Epilepsy (BFNE) secondary to KCQN2 genetic mutation in August of 2013. I say we because my entire family had genetic testing and my mother, my brother, my son, and myself were identified with the mutation. My father and John’s father were not.

My mother and I both experienced seizures in infancy, but given the lack of medical information at that time, we were just told that we had seizures. Eventually my mom and I were lucky enough to stop having them after about two years old.

My brother continues to be medicated for seizures, although his last seizure was three years ago. There are no known cognitive deficits for him, my mother, or me that we are aware of.

I knew I had had seizures as in infant and was terrified I would have them during pregnancy, but I hadn’t assumed my son would have a seizure disorder. In retrospect I could have pursued genetic testing prior to becoming pregnant, but I never imagined KCNQ2 existed or had knowledge of the relationship between seizure disorders and genetic mutations.​ And my doctor was a high-risk pregnancy specialist.

Did you know? In a 2015 study, 27 of 33 families with BFNE had a KCNQ2 mutation. Other implicated genes in the studied population include KCNQ3 and SCN2A.

Searching for supportive services

John is three years old now, and since he turned 18 months old we have been on a journey of heartbreaking developmental issues. It has been a tough month as our private daycare just asked us to leave because it was time to switch groups and they feel John is too developmentally delayed to be integrated with the three-year-olds.

John at one year

John at one year

At 18 months developmental delays began being investigated by doctors in the neonatology department. John has been identified with a severe speech delay, mild intellectual delay, and has a sensation seeking profile. He is also on a waiting list at the Autism clinic at the Montreal Children’s Hospital.

How are epilepsy and autism related, if at all? Two articles, here and here, describe the complexities and controversies of research in this area.

Privately we have spent our money on speech therapy since last January. Recently we have had a social worker through the centre local de services communautaires, or local community service centre (CLSC) and an occupational therapist who works with our son weekly. In addition, we are set to begin to receive services at the Mackay Center weekly beginning in January.

My husband and I both have to work full time and we spent more than a month searching for childcare. We were even rejected by a renown special needs pre-school as our son was identified as non-compliant and unworkable. We finally found a private daycare that is costly, and on top of the regular fee they are insisting John does additional therapy at additional cost because of his compliance issues. Unfortunately we cannot be reimbursed by insurance for that as he has no diagnosis of autism (which we do not think he has).

As challenging as his medical issues were, what we are working with now is heartbreaking, but we love our son who is a sweet, affectionate, and kind boy.

 

 Share your KCNQ2 journey here to help raise awareness of KCNQ2-related epilepsy.

John at play, 18 months old.

John at play, 18 months old.

 

 

How RIKEE helped treat a KCNQ2 patient

connections, genetics, KCNQ2, research No comments
featured image
Photograph courtesy of the Arkansas Children’s Hospital

Building a collaborative network

It’s a two-way street. The Rational Intervention for KCNQ2 Epileptic Encephalopathy (RIKEE) patient registry both provides valuable information and accepts the input of new data from volunteers, creating a powerful collaborative resource to help families, physicians, and researchers. Just ask Dr. Sarah Mulkey. Dr. Mulkey is an Assistant Professor in the Department of Pediatrics, Section of Neurology, at the University of Arkansas for Medical Sciences. She was caring for a newborn whose clinical presentation was like none she’d seen before, and RIKEE came to the rescue. The parents of Dr. Mulkey’s young patient later agreed to have their child participate in the RIKEE registry, a decision that set in motion a detailed reexamination of the histories of patients with similar stories diagnosed around the world.

Thank you, Dr. Mulkey, for sharing your insights with KCNQ2 Perspectives.

 

Searching for answers

Just after birth, a baby was having movements that looked like seizures. The infant was brought to our neonatal intensive care unit, where I work as a neonatal neurologist. The baby appeared ill, but brain imaging did not reveal a reason. Although the brain wave test (or EEG) was far from normal, it showed that the baby’s movements were not caused by seizures–in fact I could find no real seizures at all. This was a highly unusual pattern. Although I suspected there might be an underlying genetic cause for the baby’s illness, the combination of symptoms and test results was different from any patient that I had previously encountered. I decided to email Dr. Phillip Pearl in Boston, a renown expert in genetic metabolic epilepsy in children, to seek his advice.

rikee logo new

Learn all about RIKEE and how to get involved at www.rikee.org

Suspecting a genetic-related epilepsy and possibly KCNQ2, Dr. Pearl put me in contact with neurologists Dr. Ed Cooper in Houston and Dr. Roberta Cilio in San Francisco. Genetic testing indeed revealed a KCNQ2 variant. The RIKEE database also informed us that there were several other families and treating physicians participating in research that had referred children with the very same variant as found in my patient. As permitted under the RIKEE research protocol, we contacted all the treating physicians and all agreed to form a new, international collaborative team. Although the research is ongoing, overall we have learned that the patients have many similarities with each other and are different in important respects from patients with some other KCNQ2 variants. We believe this new understanding will help us design new treatment strategies, which in this instance would be tailored to not only to KCNQ2, but to an individual KCNQ2 variant.

 

“…it is important to build such networks of colleagues for rare illnesses so that we can combine our knowledge…” –SM

Only the existence of the RIKEE database and its contributing network of families, scientists and physicians allowed me to gain a real understanding of my patient’s situation. This experience showed me that it is important to build such networks of colleagues for rare illnesses so that we can combine our knowledge and advance science to provide the best care.

Adding to the registry

I also recently took care of another newborn whose history fit with the definition of benign familial neonatal epilepsy (BFNE). Like most other babies with BFNE, my patient had neonatal seizures that were easily controlled with medicine, and the baby showed normal developmental progress.  Because KCNQ2 variants are the most frequent cause of BFNE, it was not a great surprise when testing revealed a KCNQ2 variant. Based on research conducted by the RIKEE team, Dr. Cooper explained that, because of the location of the variant within KCNQ2, additional specialized genetic testing might be warranted. I contacted the genetic testing service and requested the additional analysis be performed, leading to a revised diagnosis. This provides another example of how the RIKEE database can increase understanding of these variants and improve care for individuals and their families.

Sharing what we learn

As a result of this fruitful collaboration, Dr. Cooper invited me to attend the KCNQ2 investigators’ meeting at AES (read a recap of that meeting in the Q2 News). I was able to share my experience in caring for these patients with other researchers that are working on different aspects of KCNQ2. It was inspiring to spend a day with other dedicated clinicians and neuroscientists focused in KCNQ2-related epilepsy research. I believe it is multi-disciplinary collaborations like this that will be able to make pivotal discoveries and improve the lives of patients with genetic epilepsies. I look forward to continuing these team efforts on KCNQ2.

 

Register in RIKEE to advance KCNQ2 research and speed the path to better treatments.

 

Mulkey headshot

Sarah Mulkey, MD, PhD, graduated with her medical degree at the Florida State University College of Medicine and completed her child neurology residency training at the University of Arkansas for Medical Sciences. She focuses her clinical work on caring for newborns with different types of neurologic conditions. She has a PhD in clinical research and works to find treatments for newborn brain injury and improve neurologic outcomes for babies. Outside of work, she keeps busy with her three young children ages 2, 4, and 7.

Meet a KCNQ2 Researcher

KCNQ2, KCNQ2, research
featured image

Li Li, MD, PhD

Bringing KCNQ2 to a big stage

Do you ever wonder what it really means to “support research” for KCNQ2? In our first blog, we are happy to introduce you to a special person whose work was one of our earliest investments in KCNQ2 research.

Her abstract, “KCNQ2 encephalopathy: novel single amino acid deletion variants strongly suppress currents and are responsive to SF0034” was selected for platform presentation at the Pediatric Epilepsy Highlights Session at the American Epilepsy Society (AES) meeting in Philadelphia.

JPF: Please tell us a little bit about what motivates you in your research.

LL: Mutations in the potassium channel gene KCNQ2 cause medically refractory neonatal-onset epilepsy, global developmental delay, and autism. Increasing numbers of clinical cases of KCNQ2 encephalopathy in children have been found in the past couple of years. These cases encourage me to join KCNQ2 study groups.

As a mother to two boys, nothing makes me happier than seeing them smile, watching them laugh, play and grow up healthy. So I understand how hard it is when parents have to face something as hard as watching their child struggle in their development. Being a mother encourages me and gives importance to my goal: To discover good treatments for kids’ diseases using my knowledge and techniques.

.

JPF: Can you please summarize your abstract in lay terms?

LL: Our lab and collaborators have established an international registry of KCNQ2 cases from patients. To date, we have collected around 120 KCNQ2 encephalopathy missense variants and two interesting examples of single amino acid deletion. One is a unique variant (found in one case), the other in 6 children. My goal was to clarify whether these deletion variants were likely to be the cause of the seizures and impaired development seen in patients.

LiLi missense slide

This diagram shows the location in the KCNQ2 protein of the two newly discovered single amino acid deletions (dots in red) and the 120 previously characterized missense mutations (dots in blue). A missense mutation is a point mutation in which a single nucleotide change results in a codon (a triplet of nucleotides) that codes for a different amino acid. A single amino acid deletion occurs when an entire codon is lost and the rest of the sequence is shifted. Dr. Li’s paper was the first to show that a single amino acid lost, not changed, can induce encephalopathic epilepsy.

JPF: Why do you think your abstract was selected as a highlight? What about your discovery is most valuable in advancing KCNQ2 (or epilepsy) research? 

LL: I think my abstract was selected because it is the first time deletion variants have been shown to induce KCNQ2 encephalopathy. I detected strongly reduced channel function and showed a drug could reverse some of the effects of the variant on the channel.

JPF: When did you find out your abstract was selected for special presentation, and how did you prepare for the talk? 

LL: In June, I submitted my abstract to the AES annual meeting. After 3 months, in September, I got an email from 2015 the AES scientific program committee. My abstract was selected for a Pediatric Epilepsy Highlights presentation. To prepare, Dr. Cooper and my coworkers gave a lot of valuable advice. It took around a month to organize our clinical and electrophysiological data, and I practiced many times before the presentation.

JPF: Describe your experience of presenting the work. What kind of feedback or questions did you get?

LL: About a thousand people attended my presentation. Most of the audience were doctors. They were very interested in the mechanism and drug treatment. Most of the questions I received were about drug side effects and rules to use drugs to treat encephalopathy, since I presented a new drug (SF0034) that showed similar effects as ezogabine (an FDA approved drug to treat seizures) but which may be less likely to cause the side effects of blue skin discoloration.

JPF: What are you working on next?

LL: I will try to complete these deletion variant studies and publish a paper in the near future. Also I will study other variants in KCNQ2 encephalopathy.

Li and colleagues (1)

Left to right: Baouyen Tran, a PhD student, Li Li, and Jacquenae Mays, a post-Bac student. Jacquenae and Bao are Li’s collaborators and she thanks them for tirelessly helping her in preparation and rehearsal of her talk.

 

A native of Dalian, China, Dr. Li Li received her PhD in Department of Pharmacology and Neurobiology at Tokyo Medical and Dental University and her Medical Bachelor degree at Dalian Medical University in Dalian, Liaoning, China. She has studied ion channels for 10 years and joined Dr. Ed Cooper’s Lab at Baylor College of Medicine in 2012 as a postdoctoral research fellow. Her focus is to clarify the mechanisms underlying potassium and calcium channel diseases and develop new drug treatments to cure them

 

DONATE to The Jack Pribaz Foundation to support research.