Female Kidney Transplant Recipients Are More Likely To Reject Male Donor Organs

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New analysis printed in The Lancet means that
sex-matching kidney donors and recipients could end in higher
outcomes. The report finds that when females obtain a male donor
kidney, they’ve larger charges of graft failure in comparison with the opposite
three mixtures of donor and recipient. These findings suggest that
future research and choices about organ donations ought to take intercourse into

This isn’t the primary time that intercourse points have come up in
donor-recipient relationships. For instance, in stem-cell transplants,
males who obtain feminine grafts usually tend to develop
graft-versus-host illness, and females who obtain male grafts have an
elevated threat of rejection and immunogenic reactions in opposition to H-Y (the
male Y chromosome-encoded histocompatibility antigen). Nonetheless, how H-Y
antigens have an effect on the outcomes of kidney transplants remains to be being

This most up-to-date analysis comes from a retrospective cohort research
performed by Professor Alois Gratwohl (College Hospital Basel,
Switzerland) and colleagues from the Collaborative Transplant Research in
Heidelberg. They studied 195,516 individuals who acquired kidney from
deceased donors between 1985 and 2004 at over 400 facilities in Europe. To
examine the gender variations between stem cell and stable organ
transplants, the researchers employed multivariate statistical strategies.
The fashions allowed researchers to check charges of graft survival and
death-censored graft survival at 1 and 10 years for feminine and male
recipients who acquired feminine and male donor kidneys. Demise-censored
graft survival is a measure that excludes deaths from causes not
associated to graft failure.

The outcomes of the research included fascinating gender interactions.
After 1 and 10 years, recipients of feminine kidneys have been extra more likely to
expertise graft loss than recipients of male kidneys. Usually,
feminine recipients have been much less more likely to expertise graft failure between
years 1 and 10 in comparison with male recipients. Nonetheless, when male kidneys
have been donated to feminine recipients, there was an eight% improve in graft
failure threat and an 11% improve in death-censored graft failure threat
within the first yr in comparison with the opposite three mixtures of donor and
recipient intercourse. These dangers modified to six% and 10%, respectively, between
years 2 and 10.

“Our multivariable evaluation confirmed that transplantation of kidneys from
male donor into feminine recipients induced an elevated charge of graft
failure, which suggests an immunological H-Y impact in renal
transplantation through the first yr after transplantation that
extends to 10 years of follow-up…Consideration of intercourse needs to be
built-in into future potential analyses and choices on organ
allocation,” conclude the authors. In addition they speculate that since male
kidneys are bigger and have a better variety of nephrons (the essential
structural and practical unit of the kidneys), they could be a greater
match for male recipients. Girls, alternatively, could not want as
many nephrons, and may benefit from the less-risky feminine donor

Accompanying this text is a Remark written by Dr Connie L Davis
(Division of Nephrology and Transplantation, College of Washington,
Seattle, WA, USA). She writes: “H-Y antigens can now not be ignored
within the setting of solid-organ transplantation. A number of work nonetheless
must be achieved on the precise antigens and the immunological responses
that could be related to rejection. Nonetheless, the science remains to be
too untimely to counsel that allocation schemes from lifeless donors or
choice of residing donors for transplantation take discover of this
impact, in view of the great long-term success with sex-mismatched
allografts and the restricted entry to organs.”

H-Y as a minor histocompatibility antigen in kidney
transplantation: a retrospective cohort research

Alois Gratwohl, Bernd Döhler, Martin Stern, Gerhard Opelz
The Lancet
(2008). 372(9632): pp. 49-53.
Here to View Journal Website

Written by: Peter M Crosta

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