Pig liver transplant keeps human alive in world-first medical milestone

Experts say this trial proves pigs can provide functional organs for humans, at least temporarily (Image: Pexels)

Can there be a future where waiting lists for organ transplants could shrink overnight? That vision came closer to reality this year, when surgeons in China implanted a genetically engineered pig liver into a human patient. For the first time, a porcine organ demonstrated the ability to perform critical liver functions in a living person.

According to a study published in the Journal of Hepatology, the 71-year-old recipient initially thrived after the surgery. The liver, derived from a Diannan miniature pig with ten specific gene edits, produced bile and essential clotting factors without immediate rejection. The modifications included removing pig antigens and adding human genes to improve compatibility with the patient’s immune and blood systems.

Complications soon surfaced. By day 38, doctors had to remove the graft after the patient developed xenotransplantation-associated thrombotic microangiopathy (xTMA), a rare but serious condition affecting blood vessels. Treatment with eculizumab and plasma exchange stabilised the situation temporarily. However, the patient later suffered repeated gastrointestinal bleeding and passed away on day 171.

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Experts say this trial proves pigs can provide functional organs for humans, at least temporarily. "It is a pivotal step forward, demonstrating both the promise and the hurdles," said Dr Beicheng Sun of Anhui Medical University. He emphasised the importance of tackling immune and clotting complications for future success.

Heiner Wedemeyer, MD, co-editor of the Journal of Hepatology, hailed the procedure as a landmark. "A new era of transplant hepatology has started. Genetically modified pig livers can deliver key functions in humans, offering new hope for those with acute or chronic liver failure and liver cancer," he wrote.

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What makes this case important:

Ten gene edits: These are designed to reduce rejection and improve blood compatibility.

Functional success: The produced bile and clotting factors during the first month.

Extended survival: The patient lived 171 days, offering unprecedented proof-of-concept.

Medical challenges highlighted: The immune response and blood clotting complications remain hurdles.

Potential to save lives: Millions wait for liver transplants worldwide; pig organs could ease shortages.

While the patient did not survive long-term, the experiment demonstrates that xenotransplantation, the transfer of animal organs into humans, could reshape organ replacement therapy. Scientists now have a blueprint for future trials; refine immune suppression, prevent clotting complications, and expand this approach to more patients.

The dream of bridging the organ shortage with genetically engineered animal organs may no longer be science fiction, it is edging ever closer to reality.

Disclaimer: This article, including health and fitness advice, only provides generic information. Don’t treat it as a substitute for qualified medical opinion. Always consult a specialist for specific health diagnosis.