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  • Title: Specific prolongation of MHC class II disparate skin allografts by in vivo administration of anti-IFN-gamma monoclonal antibody.
    Author: Rosenberg AS, Finbloom DS, Maniero TG, Van der Meide PH, Singer A.
    Journal: J Immunol; 1990 Jun 15; 144(12):4648-50. PubMed ID: 2112572.
    Abstract:
    In vivo rejection of MHC class II disparate skin allografts has been thought to involve IFN-gamma-induced expression of MHC class II alloantigens because less than 3% of skin epidermal cells express MHC class II alloantigens constitutively. In our study we directly tested this hypothesis by examining the effect of in vivo administered anti-IFN-gamma mAb on rejection of MHC class II disparate skin allografts, and comparing its effect on rejection of MHC class I disparate skin allografts placed on the same individual mice. We found that anti-IFN-gamma mAb blocked the rejection of MHC class II disparate skin allografts, but had no effect on the rejection of MHC class I disparate skin allografts. These results demonstrate that endogenously produced IFN-gamma is critical for rejection of MHC class II disparate skin allografts, but not for rejection of MHC class I disparate skin allografts. Thus, this study strongly supports the concept that MHC class II rejection responses require IFN-gamma induced MHC class II expression on keratinocytes of the allograft.
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