Shown above is muscle tissue from a young mouse. On the right side are healthy, new cells created to replace damaged tissue. This ability to regenerate new cells diminishes with age. Credit: Photo courtesy of Morgan Carlson and Irina Conboy, UC Berkeley Old muscle got a shot of youthful vigor in a stem cell experiment by bioengineers at the University of California, Berkeley, setting the path for research on new treatments for age-related degenerative conditions such as muscle atrophy or Alzheimer's and Parkinson's diseases.
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