Open AccessTreatment with monoclonal antibodies to ICAM‐1 and LFA‐1 in rat heart allograft rejection
Author(s) -
Brandt Michael,
Steinmann Jörg,
Steinhoff Gustav,
Haverich Axel
Publication year - 1997
Publication title -
transplant international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.998
H-Index - 82
eISSN - 1432-2277
pISSN - 0934-0874
DOI - 10.1111/j.1432-2277.1997.tb00557.x
Subject(s) - medicine , monoclonal antibody , heart transplantation , immunosuppression , transplantation , antibody , immunology , icam 1 , monoclonal , immunohistochemistry , andrology , cell adhesion molecule
During allograft rejection, leukocyte infiltration in the graft is regulated by various adhesion molecules. Treatment with monoclonal antibodies to ICAM‐1 and LFA‐1 (CD11 a) induces specific tolerance after murine heart transplantation. In this study, we investigated the possibility of tolerance induction using these antibodies in a fully incompatible rat heart transplant model. Heterotopic, intra‐abdominal heart transplantation was performed using Dark Agouti (DA) rats as donors and Lewis (LEW) rats as recipients. Group A ( n = 6) received no immunosuppression and served as controls. In group B ( n = 6) 500 µg/kg per day 1A29 (anti‐ICAM‐1) was administered intravenously (i.v.) for 5 days; group C rats received the same dosage of WT.l (anti‐CDlla) i.v. for 5 days. In group D ( n = 6), rats received combined i. v. administration of anti‐CDll a and anti‐ICAM‐1 (500 (ig/kg per day of each, for 5 days. The antibodies used were monoclonal mouse anti‐rat antibodies produced from hybridomas. Allograft survival was monitored by daily palpation of the graft. There was no statistically significant difference in allograft survival between the groups (A: 5.7 ± 0.5 days; B: 5.7 ± 0.5 days; C: 5.7 ± 0.5 days; D: 6.2 ± 0.4 days). Treatment with monoclonal antibodies to ICAM‐1 and LFA‐1 alone or in combination had no effect on allograft survival after heart transplantation between fully incompatible rat strains. We conclude that induction of tolerance using these antibodies seems inconceivable in human heart transplantation.