Abstract:
:Exciting new findings have been reported in the past few years that indicate that islets can be transplanted successfully across major histocompatibility barriers without the continuous use of immunosuppressive agents by techniques designed to eliminate passenger leukocytes. In vitro culture of donor islets either at a low temperature (24 degrees C) with a single injection of antilymphocyte serum or culture of megaislets in the presence of 95% O2 before transplantation permitted the successful transplantation of islet allografts and xenografts (rat to mouse). Definitive evidence in support of the passenger leukocyte concept has been obtained recently. Mouse islet cells have been shown to express the class I antigens of the H-2 complex, but do not express Ia antigens. Treatment of fresh mouse islets with specific anti-Ia sera and complement completely prevented rejection of islets transplanted across a major histocompatibility barrier. These findings indicate that Ia-positive cells (possibly dendritic cells) are primarily responsible for the initiation of immune rejection of the transplants. This is of particular importance with respect to the eventual transplantation of islets into human diabetics since it may be feasible to utilize antisera to HLA-DR antigens for pretreatment of islets before transplantation. In addition, these new developments may also be applicable to the transplantation of other organs such as the parathyroid, heart, kidney, liver, and skin.
journal_name
Diabetesjournal_title
Diabetesauthors
Faustman D,Lacy PE,Davie JMdoi
10.2337/diab.31.4.s11subject
Has Abstractpub_date
1982-08-01 00:00:00pages
11-6eissn
0012-1797issn
1939-327Xjournal_volume
31 Suppl 4pub_type
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