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The hearts of monkeys and pigs are in the chests of humans

 

The hearts of monkeys and pigs are in the chests of humans

On October 26, 1984, an infant born with a serious congenital heart defect underwent an experimental operation in which she received a baboon's heart transplant. The operation sparked widespread controversy and garnered significant international attention.

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The story of baby Fay, whose full name is Stephanie Fay Pockler, is one of the most controversial events in the history of medicine; it came as part of attempts at what is known as interspecies organ transplantation, i.e., transferring an organ from an animal to a human.

Stephanie was born on October 14, 1984, in Barstow, California, three weeks premature. Shortly after her birth, she was diagnosed with hypoplastic left heart syndrome, a fatal birth defect in which the left side of the heart does not develop properly. Without medical intervention, she was not expected to live more than two weeks.

The infant's parents had no health insurance, and a suitable human heart could not be found for transplantation within the short timeframe. Under these circumstances, doctors at Loma Linda University Medical Center proposed an experimental surgery.

Heart surgeon Leonard Bailey (1942–2019), an expert in organ transplantation, spent seven years researching the possibility of transplanting hearts between different species. Bailey conducted 160 animal experiments, but none of the animals survived for more than six months.

After extensive discussions with the parents and the signing of a consent form, the transplant was performed, using a heart from a young female baboon named Gobbers. The transplant took place at Loma Linda University Medical Center.

Surgically, the operation was successful, and the girl's condition improved over several days. However, on the fourteenth day, her body began rejecting the transplanted organ. The main problem was blood type incompatibility; the girl's blood type was O, while the donor baboon's blood type was AB. The girl was prescribed immunosuppressant drugs, but these caused her kidneys to begin failing.

On November 15, 1984, at the age of one month and one day, baby Faye died as a result of kidney and heart failure, caused by humoral immune rejection and blood type incompatibility.

The case of baby Faye sparked widespread debate in the United States about medical ethics and organ transplants for children. Many critics accused Dr. Bailey of prioritizing his personal scientific curiosity over the child's life, while others directed their criticism at the parents. Conversely, other parties pointed the finger at different entities, with animal rights organizations, most notably PETA, organizing protests condemning the killing of a healthy baboon for an experiment with extremely low chances of success.

Remarkably, after her baby's death, the mother, Teresa Travagan, urged Dr. Bailey to continue his research with the aim of saving other lives. Just one year later, Bailey performed the first successful heart transplant from one infant to another; the child survived and lived for more than 20 years.

This operation was a landmark, albeit a tragic one, in the development of organ transplantation medicine, because it highlighted the technical challenges associated with transplanting organs from other animal species, and raised urgent questions about the ethics of such experiments.

However, recent breakthroughs in animal-to-human heart transplants, such as pig-to-human heart transplants performed between 2022 and 2024, have been made possible by the genetic modification of donor animals.

Between 2022 and 2024, two landmark surgeries were performed in which genetically modified pig hearts were transplanted into humans. The same medical team, surgeons at the University of Maryland Medical Center led by surgeon Bartley Griffiths, performed both surgeries.

The first transplant was performed on a patient named David Bennett, aged 57, who was suffering from end-stage cardiomyopathy. The pig's heart continued to beat in his chest and kept him alive for about 60 days.

The second heart was transplanted into the chest of Lawrence Fawcett, who was 58 years old. He was suffering from end-stage heart failure, and lived with the pig's heart for about six weeks.

These two experiments demonstrated that a genetically modified pig heart can function inside a human body. However, the cases also highlighted significant challenges, such as the risk of transmission of latent infections from the donor, the difficulty of controlling the immune response in the long term, and the considerable impact of the patient's overall health before surgery on the outcomes. The medical team that performed the two procedures is currently analyzing the data to incorporate these factors into future research, with the aim of improving the chances of success.

The story of baby Fay remains a tragic and significant chapter in the history of medicine. It revealed the limitations of scientific knowledge at the time and sparked an ongoing debate about the balance between saving lives and adhering to ethical standards in medical experimentation. With advancements in genetic engineering and interspecies organ transplantation, the questions raised by Fay's story resurface, but this time in light of broader scientific possibilities and greater ethical responsibilities.

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