Scientists have achieved an unprecedented look into how the human immune system attacks a transplanted pig kidney, using spatial molecular imaging to map immune activity down to the cellular level. They discovered early signs of rejection within 10 days and pinpointed key immune players—like macrophages—driving the response. Even more exciting: when targeted therapies were applied, the immune assault weakened. As U.S. clinical trials of pig kidney transplants begin, this breakthrough offers hope for overcoming the immune barrier that has long stood in the way of xenotransplantation.
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