Record-Breaking Pig Kidney Transplant Sustains Patient for 271 Days
A pig kidney functioned for 271 days in a U.S. patient, marking a milestone in xenotransplantation.
An American man lived for 271 days with a pig kidney before receiving a human transplant, setting a new benchmark for xenotransplantation. This groundbreaking case was reported by researchers at Mass General Brigham and documented in The Lancet medical journal.
Milestone in Xenotransplantation
Tim Andrews, 66, received the pig kidney on January 25, 2025. The organ functioned without the need for dialysis, sustaining his health until he was able to undergo a human kidney transplant later in the year. This marks the longest period a pig kidney has successfully functioned in a human, according to the hospital.
The significance of this achievement lies in its potential to address the severe organ shortage crisis. Dr. Leonardo Riella, the study's lead author, emphasized the critical need for alternative solutions in transplantation. "The organ shortage is the greatest crisis we have right now in transplantation," Riella stated. He noted that while transplantation is the best option for patients with end-stage kidney disease, there are insufficient human organs available.
A Step Toward Bridging the Organ Gap
With over 100,000 individuals on the national transplant waiting list, most of whom need kidneys, the potential of pig kidneys as a temporary solution is promising. Xenotransplantation could provide a vital bridge for patients awaiting human donors, offering them a chance to maintain health without dialysis.
Mass General's achievements in this field are not new. The hospital performed the world's first pig-to-human kidney transplant in 2024, where the patient lived for 52 days. Although that patient eventually died of cardiac causes unrelated to the transplant, the case provided valuable insights for the medical community.
Dr. Riella envisions a future where xenotransplantation could evolve from a bridging solution to a more permanent therapy. As research advances, ensuring long-term safety and durability remains a priority.
Future Implications
This case demonstrates the potential of pig kidneys to function effectively in humans, offering a temporary reprieve from dialysis. It also highlights the need for ongoing research to refine the process and ensure the safety of such transplants.
The success of Tim Andrews' case could pave the way for more widespread adoption of xenotransplantation, ultimately reducing the waiting times and improving outcomes for patients with kidney failure.