Breakthrough in organ transplant as scientists create kidney that matches every blood type

After ten years of research, scientists have made a major step toward solving one of the biggest challenges in kidney transplants  finding a perfect match between donor and recipient blood types.

A team of researchers from Canada and China has successfully created a “universal” kidney that, in theory, could be accepted by any patient regardless of blood type.

The test kidney worked for several days in the body of a brain-dead person whose family allowed the experiment.

“This is the first time we’ve seen this happen in a human model,” said biochemist Stephen Withers from the University of British Columbia. “It gives us valuable knowledge to help improve future transplant results.”

Why Blood Type Matters in Transplants
Normally, people with type O blood can only receive kidneys from type O donors. Since more than half of those on transplant waiting lists have type O blood, and type O kidneys can be used for anyone, they are always in short supply.

Doctors can sometimes transplant kidneys across blood types, but the process is difficult, costly, and risky. It also requires living donors because the recipient needs time to prepare for the surgery.

How the Scientists Did It

In this study, the researchers changed a type A kidney into a type O kidney using special enzymes that remove sugar molecules (antigens) responsible for identifying blood type.

The enzymes act like microscopic scissors, cutting away parts of the molecules that make the organ appear as type A. Once removed, the kidney becomes “neutral,” just like type O blood.
“It’s like removing the red paint from a car and revealing the base coat underneath,” Withers explained. “When that happens, the immune system no longer sees the organ as foreign.”

Promising But Not Perfect Yet

After transplanting the modified kidney, the scientists noticed that by the third day, some type A markers began to reappear, triggering a mild immune reaction.

However, this reaction was less severe than usual, and the body seemed to start accepting the organ.
More work is needed before human trials can begin, but the results are very encouraging.

Why It Matters

Every day, about 11 people die in the United States while waiting for a kidney transplant, most of them needing type O kidneys.

Scientists worldwide are trying different solutions, including using pig organs and developing new antibodies to prevent rejection.

“This is what it looks like when years of basic science finally connect to patient care,” said Withers. “Seeing our discoveries move closer to saving lives keeps us going.”

The study was published in Nature Biomedical Engineering.