The dream of regrowing limbs? It's just gotten one step closer. Researchers at Massachusetts General Hospital have grow a rat forearm out of living cells in the lab. A primate limb may be next.
As New Scientist explains, the lab-grown limb makes use of an existing technique called "decel/recel," short for decellularization and recellularization. It's been used to successfully grow organs like hearts and lungs and also windpipes.
Basically, scientists took the limb of a dead rat and doused it with detergents that got rid of all its cells. Decellularization leaves only a scaffold of collagen proteins that give blood vessels, bones, and muscles their shape.
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