washington. In the world of organ transplantation, scientists have achieved an achievement which is considered very important for the future. A patient in America survived without dialysis for about nine months i.e. 271 days with the help of a gene-edited pig kidney. After this, the doctors successfully removed the pig kidney from his body and transplanted it with a human kidney.
This case is special because for the first time in a living patient, an animal organ acted as a temporary 'bridge' until a human organ was received. The report of this success has been published in the medical journal The Lancet.
Xenotransplant happened at the age of 66
The name of the patient who underwent this historic procedure is Tim Andrews. Andrews, a resident of America, was 66 years old when he underwent xenotransplantation, the process of transplanting organs from animal to human. He was suffering from end-stage kidney disease and was waiting for a long time for a human donor kidney.
The patient received a kidney transplant from a genetically modified Yucatan miniature pig under the FDA's 'Expanded Access Investigational New Drug' program.
69 genetic changes made in pig kidney
To make this kidney more suitable for the human body, 69 changes were made in the genes of the pig. The purpose of these changes was mainly to reduce the risk of kidney rejection by the human immune system and the risk of infection.
The kidney started working immediately after the transplant. Andrews did not need dialysis for about 271 days. During this time, he resumed many activities of normal life. He was able to cook, walk and do household chores.
Kidney capacity started decreasing after six months
After about six months, the pig's kidney function began to decline. Along with this, Andrews also started having problems like swelling. After about nine months, the doctors decided to remove the pig's kidney.
After this, Andrews again needed dialysis for some time. Then in January 2026, he received a human kidney from a deceased donor and successfully transplanted it.
The special thing was that the human kidney started working immediately. Subsequent testing found no evidence that the earlier transplant of a pig kidney had made Andrews' body unusually sensitive to human kidneys.
Neither animal virus found, nor immune sensitization
According to doctors, the investigation did not find evidence of transmission of any pig-related pathogen. At the same time, it was also revealed in the blood test that the pig's kidney did not produce such antibodies, which could later cause problems in the transplant of human organs.
That is, after the xenotransplant, Andrews did not face any major immune problems related to the previously transplanted animal organ when he received a human kidney.
Why is the record of 271 days special?
A significant achievement in this field is the survival of a living human being for 271 days without dialysis with the help of a pig kidney. This indicates that in the future, xenotransplantation could act as a 'bridge' for those patients who take a long time to get a human donor organ.
Many patients suffering from end-stage kidney disease remain dependent on dialysis for a long time. In such a situation, if animal organs can be used safely and effectively for some time, the patient may get additional time until a human donor is found.
After all, why only pig parts?
Attempts to transplant animal organs into humans are not new. Scientists have been researching xenotransplantation for decades and have paid special attention to organs such as pig hearts, livers and kidneys.
A major reason for this is that the shape and some physical functions of many organs of the pig are very similar to the organs of humans. However, for the animal organ to function successfully in the human body, it has to overcome major challenges like immune rejection and infection.
Hope for millions of patients
There is an acute shortage of human donor organs in the world. Patients needing kidney transplant often have to wait for a donor for a long time and during this time they have to depend on regular dialysis.
Tim Andrews' case provides early evidence that gene-edited pig kidneys could serve as a temporary life-saving solution until a human kidney can be found in the future.
However, scientists do not yet consider it a comprehensive treatment option. Further research and clinical trials are needed on questions such as immune control, protection against infection, and long-term organ function. Nevertheless, this achievement of 271 days is being considered a big step in the field of xenotransplantation.