Prolongation of porcine islet xenograft survival in mice after therapy with immunosuppressive peptides.

Abstract:

BACKGROUND:Recently, peptides derived from the heavy chain of HLA-B2702 have been shown to modulate immune responses. In this study, we examined the use of these peptides for immunosuppression in a pig to mouse islet xenograft model. METHODS:Purified porcine islets were transplanted in autoimmune (non-obese diabetic) and non-autoimmune (streptozotocin-injected CBA or C57/Bl6) diabetic mice. Various dosing regimens of HLA-derived peptides with and without antilymphocyte therapy were administered to recipient mice. Graft rejection was determined by daily serum glucose determinations, and, at selected time points, grafts were removed to demonstrate function and provide immunohistochemical examination. RESULTS:HLA-derived peptides were demonstrated to prolong graft survival in both pretransplant and posttransplant treatment regimens. This effect was increased with concomitant antilymphocyte therapy. CONCLUSIONS:Further elucidation of the mechanism of action of these immunomodulatory peptides may help in the development of novel immunosuppressive protocols.

journal_name

Transplantation

journal_title

Transplantation

authors

Squiers EC,Hodell M,Tice D,Buelow R

doi

10.1097/00007890-199812150-00022

subject

Has Abstract

pub_date

1998-12-15 00:00:00

pages

1558-61

issue

11

eissn

0041-1337

issn

1534-6080

journal_volume

66

pub_type

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