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Brain study may lead to improved epilepsy treatments
Date:4/14/2008

f epilepsy, the researchers found that glutamate, a neurotransmitter released when neurons fire during seizures, turns on a signaling pathway that activates cyclooxygenase-2 (COX-2), causing increased synthesis of P-glycoprotein in these experiments. Increased transporter expression was abolished in COX-2 knockout mice or by COX-2 inhibitors. It has yet to be shown in animals or patients that targeting COX-2 will reduce seizure frequency or increase the effectiveness of anti-epileptic drugs.

"These findings provide insight into one mechanism that underlies drug resistance in epilepsy and possibly other central nervous system disorders," said Bjoern Bauer, Ph.D., lead author on the publication. "Targeting blood-brain barrier signals that increase P-glycoprotein expression rather than the transporter itself suggests a promising way to improve the effectiveness of drugs that are used to treat epilepsy, though more research is needed before new therapies can be developed.


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Contact: Robin Mackar
rmackar@niehs.nih.gov
919-541-0073
NIH/National Institute of Environmental Health Sciences
Source:Eurekalert

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