Ciamexone--a new highly selective immunosuppressive compound.

A local graft versus host reaction between lymphocytes of Balb-c mice and its F-1-generation CB6F1 can be induced because of differences in products of the class II of the major histocompatibility complex (Ir). In this local mixed lymphocyte reaction mainly T-helper cells and B-cells are involved. An induction of a delayed type hypersensitivity reaction with oxazolon significantly decreases the local graft versus host reaction. Cyclosporin A depresses the local graft versus host reaction and the delayed type hypersensitivity in mice whereas Ciamexone, a 2-cyanaziridine derivative, very selectively only suppresses the local graft versus host reaction and increases the delayed type hypersensitivity.