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BY CHRISTINA HARTMAN They say among the things that make humans unique: Our opposable thumbs, which, by the way, we do share with some primates. But in any case, if a person were to lose a thumb in, say, an accident, we don’t have the same regenerative abilities as a lizard. Or do we? PopSci reports , there’s new hope we humans can do the same with severed limbs. You’ve probably heard about cases where people have had the tips of their fingers severed and then seemed to grow back. Back in 2010, this woman — Deepa Kularni — was able to grow back a part of her pinky finger with the help of ground-up pig bladder. NYU scientists went looking for answers. Basically, they discovered they could force the production of a family of stem cells called Wnts in mice, which were able to regrow both bone and tissue. And they confirmed, we have a family of stem cells found in the base of the nail that CAN stimulate regeneration. Those stem cells, by the way, can be found at the base of the fingernail. They tested the theory on mice — cuz you know — you can’t go severing human fingertips for the sake of testing — but they’re hopeful digit parts could be regenerated the way they did with mice. So you could say researchers “nailed” regeneration. In fact, that’s what The Scientist’s Sabrina Richards says — only — it’s just a step in the right direction: “ An important first step will be identifying other important molecules the nail stem cells release to regulate regeneration…” Researchers say they’re looking for ways to transplant the nail stem cells.
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James' World 2 
Jun 20, 2013 @ 14:48:50
Reblogged this on James' World.
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