Why do we age?

Why don’t our stem cells continue to divide to produce cells needed to repair and maintain the body? Three research groups at Harvard, University of North Carolina at Chapel Hill, and at University of Michican have found very strong evidence that as cells age they make more of a protein that slows down cells in order to reduce the risk of cancer.

“The good news is that we can get older before we get cancer,” said Sean Morrison, director of the Center for Stem Cell Biology at the University of Michigan, and lead author on one of the three papers. “The bad news is that our tissues can’t repair themselves as well.”

Much more at Future Pundit