SEP 18, 2023 8:55 AM PDT

Ageing blood - kind of like ageing wine. The longer you age it, the better, says one study

WRITTEN BY: Greta Anne

Kidney transplantation is a life-changing medical procedure for people with end-stage renal disease. Ensuring a successful transplant involves many factors such as the use of red blood cell transfusions (RBCT) in the post-transplant period. A recent comprehensive study conducted in France has turned the spotlight onto the specifics of RBCT units used and their impact on the long-term success of kidney transplants.

The study, which analyzed data from over 12,000 kidney transplant recipients, has revealed a rather unexpected discovery. It suggests that the duration of red blood cell storage might have a significant influence on the overall success of kidney transplants.

Contrary to what one might assume, the research indicates that longer storage of red blood cells is associated with better transplant survival rates. In fact, patients who received red blood cell units stored for 20 days or more experienced a remarkable 6% increase in transplant survival at the 5-year mark when compared to those who received fresher units.

Traditionally, medical literature has mostly focused on the potential drawbacks of using older blood for transfusions. Longer storage times were typically associated with adverse effects, making this finding a refreshing departure from conventional wisdom.

The study's researchers propose several intriguing theories to explain this phenomenon. One possibility is that older red blood cell units might have immunomodulatory properties that actually enhance graft survival. 

Additionally, older units may be less likely to provoke an immune response from the recipient. Fresh red blood cell units, it's suggested, might contain a higher number of white blood cells, which could expose patients to an increased risk of an immune response and subsequent graft rejection.

This groundbreaking study challenges conventional medical wisdom and introduces a fresh perspective on the role of blood transfusions in kidney transplantation. While further research is undoubtedly needed to validate and refine these findings, the implications are promising.

Sources: Mayo Clinic, Journal of the American Medical Association,

About the Author
Bachelor's (BA/BS/Other)
Greta is currently a writer at Labroots and a 3rd year Doctor of Pharmacy student, with a Bachelor of Science degree in Physiology and Neurobiology. Innovation is her passion, especially when it comes to pharma, entrepreneurship, science, and art. She is hoping to pursue a career in pharma while also fostering her creative initiatives.
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