Researchers Developed a ‘Universal’ Kidney Suitable for Any Blood Type

Breakthrough in Kidney Transplant Research

Researchers have made significant strides after a decade of work towards an important breakthrough in kidney transplants. They are getting closer to enabling the transplantation of kidneys from donors with different blood types than the recipients, which could dramatically reduce waiting times and potentially save many lives.

Last year, a team from various institutions in Canada and China revealed they had engineered a ‘universal’ kidney, one that could theoretically be accepted by any recipient. The test organ remained functional in a brain-dead recipient for several days, following consent from the family for the research.

Biochemist Stephen Withers from the University of British Columbia remarked, “This is the first time we’ve seen this play out in a human model,” when the study was released back in October. He noted it provides critical insights into improving long-term outcomes for transplant patients.

Currently, individuals with type O blood needing a kidney often find themselves waiting for a compatible type O donor. This situation affects a significant portion of people on waiting lists. Interestingly, type O kidneys can be transplanted into individuals with other blood types, yet they remain scarce.

While it is possible to perform transplants with different blood types, the existing approach to prevent organ rejection is complicated and not very practical. The method can be quite lengthy, costly, and involves certain risks, primarily depending on living donors to make it feasible due to the necessary preparation time for the recipient.

The researchers cleverly transformed a type A kidney into a type O kidney by using special enzymes that eliminate the sugar molecules marking type A blood. They likened this process to using scissors at a molecular level, trimming the type A antigen chains to achieve a state identifiable as type O blood.

Withers explained, “It’s like removing the red paint from a car and uncovering the neutral primer.” Following this alteration, the immune system stops recognizing the organ as foreign.

However, hurdles still remain before human trials can commence. The transplanted kidney showed signs of returning to type A blood by day three, prompting an immune response. Nonetheless, this reaction was milder than anticipated, indicating possible tolerance from the body towards the foreign kidney.

The statistics on this issue are alarming: in the US, 11 people die each day awaiting a kidney transplant, most of whom are in need of type O kidneys.

Addressing this challenge involves various strategies, such as exploring the use of pig kidneys and developing new antibodies. Expanding the pool of compatible kidneys could notably impact the lives of those waiting.

“This is what it looks like when years of basic science finally connect to patient care,” Withers added. “Seeing our discoveries edge closer to real-world impact is what keeps us pushing forward.”