Abstract:
:The use of anti-CD3 monoclonal antibodies to treat organ allograft rejection has been complicated by (1) the morbidity associated with the initial dose, (2) the humoral response of the patients against the mAbs, and (3) the generalized immunosuppression induced by the mAbs. We investigated the potential of F(ab')2 fragments of the anti-murine-CD3 mAb, 145-2C11, to avoid these complications in the murine model. Both whole mAb and F(ab')2 fragments induced T cell depletion. However, injection of F(ab')2 fragments of anti-CD3 mAb did not cause T cell activation, and did not induce the morbidity and mortality observed following injection of whole mAb. The humoral response against the F(ab')2 fragments was significantly reduced compared with the response against the whole mAb. Furthermore, repeated administration of F(ab')2 fragments of anti-CD3 mAb resulted in prolongation of allogeneic skin graft survival superior to that seen following treatment with a single dose of whole mAb. Finally, while T cells from mice treated with whole mAb displayed profound suppression of in vitro CTL generation, T cells from mice treated with F(ab')2 fragments had significant in vitro CTL function. These results suggest that the use of F(ab')2 fragments of anti-CD3 mAb may offer significant advantages over whole mAb for the induction and maintenance of immunosuppression.
journal_name
Transplantationjournal_title
Transplantationauthors
Hirsch R,Bluestone JA,DeNenno L,Gress REdoi
10.1097/00007890-199006000-00018subject
Has Abstractpub_date
1990-06-01 00:00:00pages
1117-23issue
6eissn
0041-1337issn
1534-6080journal_volume
49pub_type
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