Mice have been reprogrammed to partially rejuvenate.

Faster, please.

[Update a while later]

Here’s more, from Scientific American:

Kaeberlein says the study suggests it may be possible not just to slow aging but to actually reverse it. “That’s really exciting—that means that even in elderly people it may be possible to restore youthful function,” he says. Plus, it is easier to imagine a treatment that makes changes to the epigenome than to consider going into every cell and changing its genes. He also notes that the results of the new study are very similar to those seen when senescent cells—those that have lost function due to aging—are removed from an organism. It is not yet clear, he says, whether “this is another way to shut down or maybe reprogram senescent cells.”
Manuel Serrano, an expert on senescence at the Spanish National Cancer Research Center in Madrid, was not associated with in the new research but says he is impressed with the study and its results. “I fully agree with the conclusions. This work indicates that epigenetic shift is in part responsible for aging, and reprogramming can correct these epigenetics errors,” he wrote in an e-mail. “This will be the basis for future exciting developments.”

Let’s hope.