New Hope For Transplant Patients

Pig Kidney Offers Hope For Dying Patients

A brain dead patient receives a pig’s kidney 

By D. S. Mitchell 

OHSU Transplant

As a young RN I worked at University Hospital, in Portland, Oregon. My first assignment was on the Transplant floor. Although it was many years ago, now, it was a great experience, helping those who would die without a donated organ. At that time we did kidney, liver, pancreas, and hearts. It is an amazing program extending life for 1,000’s of patients over the years. One of the hardest things for patient is the seemingly interminable wait if they don’t have a genetic match with a potential family donor. At least a 100,000  people are on the national waiting list, the majority need a kidney, and sadly thousands will die waiting for a donor.

New Hope On The Way

A history making experiment has been underway for the last two months in a New York hospital that offers promise to those waiting for a kidney donation. Xenotransplantation has for decades been nothing more than a dream. The problem is the human immune system, which immediately goes to work to kill the foreign animal tissue. With a new approach scientists are working with genetically modified pigs, so the pigs organs are more humanlike. Some research teams insist on pigs that have up to 10 genetic changes.  The transplant team led by Dr. Robert Montgomery, a heart transplant recipient himself, used in this study, is a pig kidney with only one genetic modification. Importantly, the single gene modification is the removal of a gene that triggers an immediate immune attack.

Maurice “Mo” Miller 

The human recipient, Maurice “Mo” Miller, had collapsed and was declared brain-dead, his family was unable to donate his organs because of cancer. His sister after much consideration chose to donate the the man’s body to the pig experiment. Dr. Montgomery gambled that he could keep Miller’s body on a ventilator for two months to test the transplanted pig kidney. On July 14, 2023, surgeons replaced Miller’s two kidneys with one pig kidney and the pig’s thymus. The thymus is a gland that “trains” immune cells. Two months later at the termination of the experiment, Miller was taken off the ventilator and prepared for cremation. The kidney was still performing perfectly.

The Future

The information gained from this study will be provided to the FDA in the hopes that xenotransplantation may soon be attempted on living humans. Experiments on the dead cannot be predictors of organ transplant success with living subjects. I see years of testing, but this amazing case gives us all hope that someday we will be able to transplant modified animal organs into living humans, saving lives, that would have ended too soon.