Blood Type Conversion: Enzyme Tech Enables Kidney Transplant Success
- The first successful human transplant of a kidney converted from blood type A to universal type O has been achieved, utilizing specialized enzymes developed at the University of...
- Published in Nature Biomedical Engineering, this achievement represents a major advancement in the field of transplantation, offering hope to thousands of patients awaiting kidney donations.
- In a first-in-human experiment, an enzyme-converted kidney was transplanted into a brain-dead recipient with family consent.This allowed researchers to carefully observe the immune response without endangering a living...
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First Successful Human Kidney Transplant After Blood Type Conversion
Table of Contents
The Breakthrough: Converting Blood Types for Transplantation
The first successful human transplant of a kidney converted from blood type A to universal type O has been achieved, utilizing specialized enzymes developed at the University of British Columbia. These enzymes help prevent immune mismatch and organ rejection.
Published in Nature Biomedical Engineering, this achievement represents a major advancement in the field of transplantation, offering hope to thousands of patients awaiting kidney donations.
How the Procedure Works
In a first-in-human experiment, an enzyme-converted kidney was transplanted into a brain-dead recipient with family consent.This allowed researchers to carefully observe the immune response without endangering a living patient.
for the first two days, the transplanted kidney functioned normally, showing no signs of hyperacute rejection – the rapid immune reaction that can destroy incompatible organs within minutes. On the third day, some blood-type markers reappeared, triggering a mild immune response. However, the damage was significantly less severe than typically seen in mismatched transplants, and researchers observed indications that the recipient’s body was beginning to accept the organ.
“This is the first time we’ve seen this play out in a human model,” said Dr. Stephen Withers, UBC professor emeritus of chemistry and co-leader of the enzyme advancement. “It gives us invaluable insight into how to improve long-term outcomes.”
The Science Behind the Conversion
This breakthrough is the culmination of over a decade of research. Beginning in the early 2010s, Dr. Withers and Dr. Jayachandran Kizhakkedathu, a UBC professor in the department of pathology and laboratory medicine and the Center for Blood Research, initially focused on creating universal donor blood by removing the sugars that define blood types.
These same sugars, known as antigens, coat the blood vessels of organs. If a recipient’s immune system identifies the wrong antigen, it initiates an attack. Type-O patients – comprising more than half of kidney waitlists – can onyl receive type-O organs. however, type-O kidneys are often allocated to patients with other blood types because they are universally compatible. Consequently, type-O patients often face wait times two to four years longer than others, and sadly, many die while waiting.
Addressing the Kidney Shortage & Improving outcomes for Type-O Patients
Traditional methods for overcoming blood-type incompatibility in transplants involve days of intensive treatment to remove antibodies and suppress the recipient’s immune system. These methods also typically require organs from living donors. This new enzymatic approach alters the organ itself, rather than the patient, potentially enabling faster transplants with fewer complications.Crucially, it could unlock the use of previously incompatible organs for type-O patients.