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'Gifted' natural vitamin E tocotrienol protects brain against stroke in 3 ways
Date:7/5/2011

or research in Ohio State's Department of Surgery and senior author of the study. "Here, a natural nutritional product is simultaneously acting on multiple targets to help prevent stroke-induced brain damage. That is a gifted molecule."

The research appears online and is scheduled for later print publication in the journal Stroke.

Over the past decade, Sen has led numerous studies on how the TCT form of vitamin E protects the brain against stroke damage in animal and cell models, and intends to eventually pursue tests of its potential to both prevent and treat strokes in humans. Approximately 795,000 Americans suffer new or recurrent strokes each year, and stroke is the third-leading cause of death in the United States, according to the American Stroke Association.

These latest research findings in mice follow a recent Food and Drug Administration certification of TCT as "Generally Recognized as Safe." The scientists conclude in the paper that even before clinical trials can take place, "TCT may be considered as a preventive nutritional countermeasure for people at high risk for stroke."

To determine the role of MRP1 in protecting brain cells, the researchers compared the effects of an induced stroke in two groups of mice: normal mice and animals that were genetically modified to be deficient in the MRP1 protein.

Both groups of mice showed comparably decreased blood flow in the area of the stroke, but the mice deficient in MRP1 had a larger volume of tissue death than did normal mice.

The mice with the protein deficiency also had a 1.6-fold higher level of a toxin that is cleared by MRP1. This toxin is called GSSG, or glutathione disulfide, and these researchers have previously shown that a failure to clear this toxin appears to trigger neuron death in the brain after stroke.

"The protein has the effect of dredging out the toxin," said Sen, who is also a deputy director of Ohio State's Davis Heart and
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Contact: Chandan Sen
chandan.sen@osumc.edu
614-247-7786
Ohio State University
Source:Eurekalert

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