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Study identifies new approach to improving treatment for MS and other conditions
Date:5/17/2013

(SACRAMENTO, Calif.) Working with lab mice models of multiple sclerosis (MS), UC Davis scientists have detected a novel molecular target for the design of drugs that could be safer and more effective than current FDA-approved medications against MS.

The findings of the research study, published online today in the journal EMBO Molecular Medicine could have therapeutic applications for MS as well as cerebral palsy and leukodystrophies, all disorders associated with loss of white matter, which is the brain tissue that carries information between nerve cells in the brain and the spinal cord.

The target, a protein referred to as mitochondrial translocator protein (TSPO), had been previously identified but not linked to MS, an autoimmune disease that strips the protective fatty coating off nerve fibers of the brain and spinal cord. The mitrochronical TSPO is located on the outer surface of mitochondria, cellular structures that supply energy to the cells. Damage to the fatty coating, or myelin, slows the transmission of the nerve signals that enable body movement as well as sensory and cognitive functioning.

The scientists identified mitochondrial TSPO as a potential therapeutic target when mice that had symptoms of MS improved after being treated with the anti-anxiety drug etifoxine, which interacts with mitochondrial TSPO. When etifoxine, a drug clinically available in Europe, was administered to the MS mice before they had clinical signs of disease, the severity of the disease was reduced when compared to the untreated lab animals. When treated at the peak of disease severity, the animals' MS symptoms improved.

"Etifoxine has a novel protective effect against the loss of the sheath that insulates the nerve fibers that transmit the signals from brain cells," said Wenbin Deng, principal investigator of the study and associate professor of biochemistry and molecular medicine at UC Davis.

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Contact: Charles Casey
charles.casey@ucdmc.ucdavis.edu
916-734-9048
University of California - Davis Health System
Source:Eurekalert

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