In the Penn study, researchers observed stable blood flow and pressure. There were also no signs of inflammation. 'The simple question was, would our organs perform better? And the answer now is yes,' he says.
Whether all 69 edits are needed is still up for debate. A study published in 2000 showed that organs from pigs with just two genetic modifications were able to support two liver failure patients for up to 10 hours before they were able to get a transplant from a human donor.
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