Abstract:
:The immunosuppressive potentials of mAbs to lymphocyte function-associated antigen-1 (LFA-1) and CD2 molecules were examined in murine islet transplantation. Crude digested islets from BALB/c (H-2d) mice were transplanted into the renal subcapsular space of streptozotocin-induced diabetic C57BL/6 (H-2b) mice. The rat mAbs of KBA (anti-LFA-1) and RM2-1 (anti-CD2) were given intraperitoneally immediately after transplantation and on the first day after grafting at a dose of 0.1 mg/mouse/day. In nontreated animals, the islet allografts were acutely rejected with a mean survival time (MST) of 19.6 +/- 8.3 days. Control isotype-matched anti-CD18 treatment did not prolong the MST of 12.8 +/- 1.6 days. Anti-LFA-1 treatment alone produced indefinite survival in 5 of 10 recipients with MST of 72.2 +/- 33.4 days. Anti-CD2 treatment failed to do so, although MST was marginally prolonged to 32.8 +/- 20.5 days. When both mAbs were given together, additional benefit with anti-CD2 treatment was not observed (MST: 77.4 +/- 31.1 days). In spite of the unresponsiveness to islet allografts, the animals did not suffer from any severe infectious disease. Mice bearing long-term functioning islets rejected third-party skin grafts as well as islet donor strain skin grafts. The long-term surviving islet allografts were also rejected coincidentally. These results indicate that a perioperative short course of anti-LFA-1 mAb treatment can induce unresponsiveness to islet allografts, although it is not systemic, and that costimulatory signals through these adhesion molecules play a central role in inducing an immune response leading to rejection of the allografted islets.
journal_name
Transplantationjournal_title
Transplantationauthors
Gotoh M,Fukuzaki T,Monden M,Dono K,Kanai T,Yagita H,Okumura K,Mori Tsubject
Has Abstractpub_date
1994-01-01 00:00:00pages
123-6issue
1eissn
0041-1337issn
1534-6080journal_volume
57pub_type
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