Epilepsy pick up sticks
Imagine the game of pick up sticks. It’s hard to extract one stick from the pile without moving others. The same problem exists, in a much more complex way, in the brain. Pulling on one gene or neurotransmitter often nudges a lot of others.
That’s why a recent paper from Andrew Escayg’s lab is so interesting. He studies genes involved in epilepsy. Several years ago, he showed that mice with mutations in the SCN8A gene have absence epilepsy, while also showing resistance to induced seizures. SCN8A is one of those sticks that touches many others. The gene encodes a voltage-gated sodium channel, involved in setting the thresholds for and triggering neurons’ action potentials. Mutating the gene in mice modifies sleep and even enhances spatial memory.
Escayg’s new paper, with first author Jennifer Wong, looks at the effect of “knocking down” SCN8A in the hippocampus in a mouse model of mesial temporal lobe epilepsy.
Dr. Escayg is a faculty member in the GMB and NS programs.