Diabetes, Vol 42, Issue 10 1520-1527, Copyright © 1993 by American Diabetes Association
Major histocompatibility complex class I deficiency prolongs islet allograft survival
RW Osorio, NL Ascher, R Jaenisch, CE Freise, JP Roberts and PG Stock
Department of Surgery, University of California, San Francisco 94143.
Because of islet allograft rejection, nonimmunosuppressed pancreatic islet
allotransplantation has been unsuccessful for the treatment of type I
diabetes. The role of major histocompatibility complex class I antigen
expression on islet allograft survival was evaluated with the use of mice
homozygous for a beta 2-microglobulin gene disruption. These mice express
little if any functional major histocompatibility complex class I antigen.
When these major histocompatibility complex class I-deficient islets were
used as donors in an allogenic murine transplantation model, islet
allograft survival was markedly prolonged. These results demonstrate a
major importance for the alloresponse directed against major
histocompatibility complex class I antigen.