Tag Archives: research

Understanding Absence Epilepsy

Did you know that epilepsy is the fourth
most common neurological problem of our society?

Epileptic seizures are the result of abnormal activity in the brain. Source: Youtube

Epileptic seizures are the result of abnormal activity in the brain. Absence epilepsy is one form of epileptic seizures, characterized by a momentary loss of awareness, usually lasting less than ten seconds. What differs an epileptic seizure from a non-epileptic seizure is that it is recurrent and non-epileptic seizures may be induced by psychological issues or stress-related factors.

Absence epilepsy is often associaed with children who have trouble in school, social problems, or who misbehave often. Source: Flickr

Absence epilepsy is often associated with children who have trouble in school, social problems, or who misbehave often. Source: Flickr

This condition is more common among children than in adults. As a result, absence seizures are often mistaken as daydreaming or periods of blanking out. Symptoms of absence seizures include fluttering eyelids, smacking of the lips, or rubbing fingers together. Absence epilepsy is often associated with children who have trouble in school, social problems, or who misbehave often. Most children will outgrow their seizures by age 18, however in some cases they can continue throughout the rest of their lives.

To understand a bit more about absence epilepsy, the podcast below depicts a scenario of a child experiencing absence seizures and how current research will fuel further medical studies to help with this disorder.
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There are current studies being conducted on the causes of this condition at the University of British Columbia, and we interviewed Dr. Stuart Cain at the Djavad Mowafaghian Centre for Brain Health about his research on absence epilepsy.

The main focus of Dr. Cain’s research is on calcium channels in the brain, and the role they play in absence epilepsy. It is found that the overactivity of certain calcium channels located specifically in the cells of the brain leads to a phenomenon known as “burst-firing”, and this is thought to be what triggers absence seizures.

The causes of absence epilepsy are still unknown, although there are many theories as to what causes an absence seizure. Dr. Cain believes that when overactive brain cells in one specific region communicates with two other regions of the brain and causes them to be stuck in a synchronous loop; this is what causes absence epilepsy.

The video below explains further on how absence seizures occur, and what the main findings of Dr. Cain’s research were:
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There are currently two types of drugs available to treat absence epilepsy, and although they work for most people in stopping absence seizures from occurring, they have not been shown to be 100% effective.

Dr. Cain and his team of researchers’ study serve as foundation for further development of anti-seizure medications to control absence seizures. He believes that in order to find a drug that will be completely effective in controlling absence seizures, the drug will need to target the calcium channels in the brain which cause burst-firing. Dr. Cain suggests that the next move is to push pharmaceutical industries to create a drug capable of doing just that. If this proves to be successful, perhaps then children will not have to worry about absence epilepsy affecting their lives.

Posted on April 4, 2016
By Emma Peachey, Jenny Ung, Karanvir Gill, Harsh Bhatt

Type 1 Diabetes: A Potential Cure?

Type 1 Diabetes, also known as diabetes mellitus type 1, is a condition characterized by the impaired ability of one’s pancreas to produce insulin. In an individual with type 1 diabetes, the immune system malfunctions and attacks the beta cells of the pancreas, which are responsible for producing insulin. This classifies type 1 diabetes as an autoimmune disease, which is where the immune system attacks the body, thus it is currently incurable. The current treatment for this condition involves daily injections of insulin to allow the individual to regulate their blood sugar levels. Unfortunately, insulin therapy has side effects, such as hypoglycemia (low blood glucose levels) or hyperglycemia (high blood glucose levels) from incorrect dosages, and some individuals may be allergic to the preservatives added to insulin medication. Furthermore, insulin therapy involves precise control of blood sugar levels, and this is very difficult to achieve, often causing patients to face long-term medical problems as a result.

Diagram of the pancreas and beta cells. Via Wikimedia Commons.

Diagram of the pancreas and beta cells. Via Wikimedia Commons.

So what is this new potential cure? It began in 2014, when a team of Harvard University researchers used human stem cells, unspecialized cells that can become cells with a specific function, to create new beta cells in large quantities, as published in Cell. This new technique of creating insulin producing cells from human embryonic stem cells was a big step in diabetes research. In further experiments, these beta cells were transplanted into diabetic mice, as an attempt to replace the destroyed beta cells. Unfortunately, the immune system in the mice destroyed these new beta cells as well.

The experiments were first done on lab mice. Via Wikimedia Commons.

The experiments were first done on lab mice. Via Wikimedia Commons.

A team of researchers from MIT and several other institutions have devised an “invisibility cloak” for the beta cells, so they can hide from the faulty immune system. The cloak is composed of modified alginate, which is a material isolated from brown algae. After testing 800 various derivatives of this alginate capsule, they chose the best capsule from the tests, known as triazole-thiomorpholine dioxide (TMTD). This research was shown in a recently posted article in the Nature Biotechnology journal.

Brown algae that form the alginate used in "invisibility cloak". Via Wikimedia Commons.

Brown algae that form the alginate used in “invisibility cloak”. Via Wikimedia Commons.

The results were incredible! As a study in Nature Medicine showed, the injected mice were able to produce insulin until the implants were removed 174 days later. This has massive implications for diabetes therapy, as not being dependent on insulin injections is the end goal. If these implants were able to function in humans, then the diabetic individuals would not require insulin injections anymore. The next step of research is to move from trials on mice to trials on primates. If the tests on primates show positive results, the step after would be human trials. Researchers are making large strides towards a cure for type 1 diabetes.

– Kush Khanna