重启干细胞或可增强衰老肌肉

OLD mice grow bigger muscles and recover from injuries better when stem cells are taken out of their aged muscles, given a reboot, then put back in. A similar approach may allow rejuvenation of ageing muscles in people, too. “In theory, if you took an elderly person’s muscle stem cells out, charged them up and put them back in, they would probably be more functional,” says James White at Duke University in North Carolina. Muscle stem cells generally lie dormant in muscle tissue, but when a muscle is injured, they grow into new muscle cells to patch up the damage. “Muscles rely very much on regeneration because they’re so susceptible to mechanical strain,” says White. …