oxytocin410

oxytocin

The image on the left is muscle from an old mouse showing a lower density of muscle fibers, scarring and inflammation. The addition of the hormone oxytocin to the blood of old mice rejuvenated old muscle so that it looked young again, as shown on the right. There is a marked increase in muscle fibers and a reduction of scar tissue. (Photos by Wendy Cousin and Christian Elabd, UC Berkeley)

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