Knowledge | The Future of Organ Transplantation? Hope and Controversy Behind Pig Organ Transplants—An Interview With CNN Chief Medical Correspondent Dr. Gupta
Knowledge | The Future of Organ Transplantation? Hope and Controversy Behind Pig Organ Transplants—An Interview With CNN Chief Medical Correspondent Dr. Gupta
Every day, 17 people in the United States die while waiting for an organ transplant. More than 100,000 people are on the waiting list, most with end-stage kidney disease urgently needing a kidney. On the WebMD Health Discovered podcast, host and lifestyle medicine director Dr. Neha Pathak spoke with CNN Chief Medical Correspondent Dr. Sanjay Gupta about his two years making the CNN documentary Animal Pharm and the pioneering but controversial field of xenotransplantation.
Xenotransplantation means transplanting genetically edited animal organs, primarily from pigs, into humans. A neurosurgeon and veteran medical journalist, Dr. Gupta was initially drawn to CRISPR gene editing and then its use in xenotransplantation. “Making dozens of changes to the pig genome so its organs more closely resemble human organs and are less likely to be rejected is scientifically remarkable,” he said.
Some biotechnology companies make up to 69 edits, removing pig genes that encode proteins capable of triggering a human immune response, altering coagulation, and adding human genes to improve compatibility. Other companies argue that 10 edits are enough. Both approaches aim to make pigs a living source of organs for human transplantation.
For the documentary, Dr. Gupta visited highly biosecure pig facilities in the United States. “They are cleaner than most human hospitals. Water and air are rigorously filtered, and staff follow even stricter precautions. You can feel the tension between science and ethics,” he said.
Ethical questions are unavoidable. Dr. Gupta spoke with people from different faiths, ethicists, and patient families. Although Islam, Judaism, and other traditions have clear rules concerning pigs, many religious leaders take a more flexible view when a life can be saved. New York University ethicist Art Caplan said religious and moral challenges must be reconsidered around the principle of preserving life.
The technology remains at an early stage. The U.S. Food and Drug Administration (FDA) approved the first xenotransplantation clinical trial after earlier consent-based studies primarily involved brain-dead patients. In 2024, Tim Andrews received a pig kidney and survived for more than 130 days, the longest recorded survival after xenotransplantation. Dr. Gupta believes these pioneers will appear in future medical textbooks.
A major concern is cross-species transmission of pig viruses. Viruses harmless in pigs could potentially cause a global crisis like COVID-19 if transmitted to humans. Every health record for genetically engineered pigs is repeatedly reviewed, and recipients’ family members must also give informed consent because potential exposure is a genuine possibility.
Asked why costly, risky xenotransplantation is not replaced with 3D-printed or laboratory-grown organs, Dr. Gupta cited a question from his daughter: “Why not just make an artificial organ?” He sees this as the future. “Perhaps soon we will print personalized organs from our own cells and keep them in cold storage. Until then, xenotransplantation is the most feasible breakthrough available.”
Looking ahead, Dr. Gupta said: “Within five years, xenotransplantation will become a mainstream medical option.” It could save lives and restore quality of life, offering millions of dialysis patients not only survival but a return to daily living.
Knowledge | The Future of Organ Transplantation? Hope and Controversy Behind Pig Organ Transplants—An Interview With CNN Chief Medical Correspondent Dr. Gupta
Knowledge | The Future of Organ Transplantation? Hope and Controversy Behind Pig Organ Transplants—An Interview With CNN Chief Medical Correspondent Dr. Gupta
Every day, 17 people in the United States die while waiting for an organ transplant. More than 100,000 people are on the waiting list, most with end-stage kidney disease urgently needing a kidney. On the WebMD Health Discovered podcast, host and lifestyle medicine director Dr. Neha Pathak spoke with CNN Chief Medical Correspondent Dr. Sanjay Gupta about his two years making the CNN documentary Animal Pharm and the pioneering but controversial field of xenotransplantation.
Xenotransplantation means transplanting genetically edited animal organs, primarily from pigs, into humans. A neurosurgeon and veteran medical journalist, Dr. Gupta was initially drawn to CRISPR gene editing and then its use in xenotransplantation. “Making dozens of changes to the pig genome so its organs more closely resemble human organs and are less likely to be rejected is scientifically remarkable,” he said.
Some biotechnology companies make up to 69 edits, removing pig genes that encode proteins capable of triggering a human immune response, altering coagulation, and adding human genes to improve compatibility. Other companies argue that 10 edits are enough. Both approaches aim to make pigs a living source of organs for human transplantation.
For the documentary, Dr. Gupta visited highly biosecure pig facilities in the United States. “They are cleaner than most human hospitals. Water and air are rigorously filtered, and staff follow even stricter precautions. You can feel the tension between science and ethics,” he said.
Ethical questions are unavoidable. Dr. Gupta spoke with people from different faiths, ethicists, and patient families. Although Islam, Judaism, and other traditions have clear rules concerning pigs, many religious leaders take a more flexible view when a life can be saved. New York University ethicist Art Caplan said religious and moral challenges must be reconsidered around the principle of preserving life.
The technology remains at an early stage. The U.S. Food and Drug Administration (FDA) approved the first xenotransplantation clinical trial after earlier consent-based studies primarily involved brain-dead patients. In 2024, Tim Andrews received a pig kidney and survived for more than 130 days, the longest recorded survival after xenotransplantation. Dr. Gupta believes these pioneers will appear in future medical textbooks.
A major concern is cross-species transmission of pig viruses. Viruses harmless in pigs could potentially cause a global crisis like COVID-19 if transmitted to humans. Every health record for genetically engineered pigs is repeatedly reviewed, and recipients’ family members must also give informed consent because potential exposure is a genuine possibility.
Asked why costly, risky xenotransplantation is not replaced with 3D-printed or laboratory-grown organs, Dr. Gupta cited a question from his daughter: “Why not just make an artificial organ?” He sees this as the future. “Perhaps soon we will print personalized organs from our own cells and keep them in cold storage. Until then, xenotransplantation is the most feasible breakthrough available.”
Looking ahead, Dr. Gupta said: “Within five years, xenotransplantation will become a mainstream medical option.” It could save lives and restore quality of life, offering millions of dialysis patients not only survival but a return to daily living.
Source:
Collected online