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A new kind of gene-edited pig kidney was just transplanted into a person


A New Jersey woman is the second living recipient of a pig kidney.

In the coming weeks, doctors will be monitoring Pisano closely for signs of organ rejection, which occurs when the recipient’s immune system identifies the new tissue as foreign and begins to attack it. Pisano’s kidney came from pigs that carry just a single genetic alteration—to eliminate a specific sugar called alpha-gal, which can trigger immediate organ rejection, from the surface of its cells. The kidney is implanted along with a piece of the pig’s thymus gland, which plays a key role in educating white blood cells to distinguish between friend and foe.

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