A research group led by professor Ko Matsui from the Super-network Brain Physiology Lab at Tohoku University reported on a stimulation paradigm used on experimental animals that could potentially cultivate resilience to epilepsy.
Frequent seizure-evoking stimulation to the brain has been shown to induce epileptogenesis and epileptic brain conditions. To the researcher’s surprise, however, repeated stimulation resulted in a dramatic decrease in the seizure response to the stimulus.
“Our brain has an infinite ability for plasticity,” says Matsui. “If an epileptic state can be created, we must query whether it is also conceivable to reverse the transition or to override the existing hyper-excitable circuit with an additional suppressive system.”
Using optogenetics technology to control the activity, Dr. Yoshiteru Shimoda, Matsui and their team demonstrated that a specific stimulation paradigm prompted the release of the endogenous inhibitory transmitter adenosine from glial cells. This converted the rat’s brain to a state strongly resistant to seizures.
Details of their findings were published in Neurobiology of Disease online.
Matsui is cautiously optimistic. “Although epileptogenesis unfortunately could not be reversed, we showed we could invoke the homeostatic nature of the brain circuit to contain hyper-excitation.”