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Dartmouth researchers identify a gene that enhances muscle performance

sible to achieve elements of muscular fitness without having to exercise, which in turn, raises many questions about possible modes of exercise performance enhancement, including the development of drugs that could do the same thing as we have done genetically," he says. "This also might raise to some the specter of 'gene doping,' something seriously being talked about in the future of high-performance athletes."

Witters says that the carbohydrate, glucose, is a major fuel that powers muscles, and this contributes directly to a muscle's ability to repetitively contract during exercise. The activated AMPK in the Dartmouth mouse appears to have increased glycogen content by actually switching on a gene that normally synthesizes liver glycogen.

"The switching on of this liver gene in muscles," he says, "is a shift in the conception of the biochemistry of muscle metabolism, since many enzyme genes are thought to only be active in just one tissue."


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Contact: Sue Knapp
sue.knapp@dartmouth.edu
603-646-3661
Dartmouth College
15-Nov-2006


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