[Characterization of the adaptive response to the action of gamma-rays, induced by low doses of 14C in Chinese hamster fibroblasts].

It has been studied the correlation of the mitotic activity of the chromosome aberrations and apoptosis, in the V-79 cells pre-exposure to an adapting dose of ionizing radiation from 14C-thymidine prior to an acute challenge dose of gamma-rays. In spite of that the incubation of the cells with isotope increased of the yield of the chromosome aberrations, but the cells became more resistant to following gamma-irradiation. Increasing the adaptive dose of the 14C on degree didn't influence on the present of the adaptive response. However, using concentrations of the 14C damaged metaphase/anaphase transition and cells blocked in this check-point by apoptotic death. The results suggest, that the cellular selection has been involved in 14C-induced adaptive response, estimated by level of asymmetric chromosome aberrations in V-79 cells.