It sounds like something out of a bad movie. But Amy Wagers and other researchers at the Harvard Stem Cell Institute and Joslin Diabetes Center in Boston have found a way to reverse signs of aging in older mice.
“They recovered functions not quite to ‘young’ levels but really quite significantly, and easily, easily distinguishable from older animals that didn’t see this ‘young blood’ within their tissues,” Wagers said.
From Technology Review:
In the experiment, Wagers and team surgically connected the circulatory systems of two mice, allowing older animals to be exposed to blood–and all the molecules and cells it carries– from young animals. They found that the procedure made the blood-forming stem cells in older animals act young again; the overall number of these cells decreased, and the cells generated different varieties of blood cells in more appropriate ratios. “In aged animals, many of the changes we see normally that are associated with age were reversed,” said Wagers.