[The effect of ionizing radiation and immunomodulators on the development of the graft versus host reaction]

The reaction "transplant against host" (RTAH) was performed by subcutaneous transplantation of popliteal lymphnode lymphocytes of C57Bl/6 mice (CBA X C57Bl/6)F1 mice. gamma-Irradiation of donors with a dose of 6 Gy was shown to activate the function of T-lymphocytes, effectors in RTAH. Recipients irradiated with the same dose exhibited a drastic decrease in the ability of the organism to restrict RTAH. Decaris administered 15 min after irradiation of donors removed the postirradiation RTAH increase. In nonirradiated donors or recipients, the immunomodulators increased RTAH.