If you're an aging baby boomer hoping for a buffer physique, there's hope. A team of American scientists from Texas and Michigan have made a significant discovery about the cause of age-related muscle atrophy that could lead to new drugs to halt this natural process. This research, available online the FASEB Journal (http://www.fasebj.org), shows that free radicals, such as reactive oxygen species, damage mitochondria in muscle cells, leading to cell death and muscle atrophy. Now that scientists understand the cause of age-related muscle loss, they can begin to develop new drugs to halt the process.
"Age-related muscle atrophy in skeletal muscle is inevitable. However, we know it can be slowed down or delayed," said Holly Van Remmen, Ph.D., co-author of the study, from the Sam and Ann Barshop Institute for Longevity and Aging Studies at the University of Texas Health Science Center at San Antonio. "Our goal is to increase our understanding of the basic mechanisms underlying sarcopenia to gain insight that will help us to discover therapeutic interventions to slow or limit this process."
To make this discovery, Van Remmen and colleagues used mice that were genetically manipulated to prevent them from having a protective antioxidant (CuZnSOD). As a result of not being able to produce this antioxidant, the mice had very high levels of free radicals (reactive oxygen species) and lost muscle mass and function at a much faster rate than normal mice. Additionally, the muscles of the genetically modified mice were much smaller and weaker than those of normal mice. Scientists believe that these findings mimic effects of the normal aging process in humans, but at an accelerated rate.
"I don't expect to see baby boomers gracing the pages of body building magazines tomorrow. But this research is important because it identifies molecules responsible for the aging of our muscles: free radicals," said Gerald Weissmann, M.D., Editor-in-Chief of the FASEB Journal. "Stop these from acting and we'll all look younger, stronger and fit at any age.
Receive monthly highlights from The FASEB Journal by e-mail. Sign up at http://www.faseb.org/fasebjournalreaders.htm. The FASEB Journal (http://www.fasebj.org) is published by the Federation of the American Societies for Experimental Biology (FASEB). The journal has been recognized by the Special Libraries Association as one of the top 100 most influential biomedical journals of the past century and is the most cited biology journal worldwide according to the Institute for Scientific Information. FASEB is composed of 23 societies with more than 90,000 members, making it the largest coalition of biomedical research associations in the United States. FASEB enhances the ability of biomedical and life scientists to improve-through their research-the health, well-being and productivity of all people. Its mission is to advance health and welfare by promoting progress and education in biological and biomedical sciences through service to our member societies and collaborative advocacy.
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The FASEB Journal