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  • Title: Suppressive effects of cyclosporin A on the induction of alloreactivity in vitro and in vivo.
    Author: Wang BS, Heacock EH, Collins KH, Hutchinson IF, Tilney NL, Mannick JA.
    Journal: J Immunol; 1981 Jul; 127(1):89-93. PubMed ID: 6453900.
    Abstract:
    The purpose of the present study was the investigation of the effect of cyclosporin A (CsA) on the induction of alloreactivity in vitro and in vivo. Addition of CsA to mouse mixed lymphocyte cultures (MLC) not only inhibited lymphocyte proliferation but also prevented the generation of alloreactive cytolytic lymphocytes (CL). It was necessary to add CsA within the first 3 days of a 5-day MLC in order to achieve a significant suppressive effect. Lymphocytes, after being cultured in MLC with CsA for 4 days or longer, were incapable of being activated upon re-exposure to the same alloantigens although their responses to unrelated antigens remained intact, indicating antigen specificity of the suppression induced by CsA and its long-lasting effect. Furthermore, lymphocytes from mice treated with CsA after allosensitization failed to manifest primary cytotoxicity and could not be reactivated in a secondary MLC. Finally, CsA had no effect on those CL already generated, suggesting that CsA acts upon the induction of CL rather than the effector phase.
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