[Mitomycin C-induced mutagenesis].

The mutagenic effect of mitomycin C (MC) has been shown in the S phase of Crepic capillaris cells. The repair ability of MC-induced DNA lesions proves exceedingly high, due to post-replicative and excision repair processes. In the experiments with MC-pretreatment of Crepic capillaris cells, nonmutagenic concentration of 1 microgram/ml provides inducible repair system--"adaptive response", which considerably decreases the levels of mutagenesis induced by MC at concentrations of 10, 20 and 40 micrograms/ml.