Brain-dead man first to receive kidney transplant from genetically modified pigs

Publicly released:
International
Photo by  amber kipp on Unsplash
Photo by amber kipp on Unsplash

Scientists have successfully transplanted two kidneys from genetically modified pigs into a brain-dead human recipient. Researchers say the transplant is an important next step in the bid to address a global organ shortage, but further studies and adjustments will be necessary before they can attempt transplantation in living human subjects. Pig kidneys have been transplanted into several primate species in the past, revealing several key incompatibilities with human immune systems that have since been addressed with genetic engineering. The current study showed the adjustments were effective in helping the human body accept the ‘xenotransplant’, but the amount of urine produced by the kidneys varied, and other important kidney functions didn't recover. Humans have higher blood pressure than pigs and primates, but the pig kidney withstood the increase, and cross-species viral infections were not observed.

Media release

From: Wiley

Scientists transplant two pig kidneys into human recipient

In a new study published in the American Journal of Transplantation, researchers report that they successfully transplanted two kidneys from a genetically modified pig into a human who was brain dead.

The transplantation of pig organs into humans promises to increase the number of available organs for transplantation and prevent thousands of deaths in the U.S. that result each year due to a shortage of organs.

This study used a novel preclinical human model to answer numerous critical safety questions so as to promote advancement of xenotransplantation into living humans. Although the physiologic stress in the decedent was not an ideal environment to support kidney function, the kidneys produced urine and were not rejected in the short term.

The study provides important insights and identifies several areas where additional research is needed before xenotransplantation can be used to help address the current organ shortage.

“This study provides knowledge that could not be generated in animal models and moves us closer to a future where organ supply meets the tremendous need,” said senior author Jayme E. Locke, MD, MPH, of the University of Alabama at Birmingham.

Journal/
conference:
American Journal of Transplantation
Research:Paper
Organisation/s: University of Alabama at Birmingham, Deakin University School of Medicine
Funder: This work was supported by United Therapeutics Corporation
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