[Useage of genetic markers to determine the impact of radiation on the human body].

The timely determination of the fact of radiation impact on the organism is extremely important for preventive and curative interventions. Despite the fact that so far cytogenetic violations are considered to be the best biomarkers to determine the impact of ionizing radiation on the organism, actual problem is to find the optimal combination of different biomarkers. The aim of the work was investigation of the extended set of biomarkers in distant periods of exposure in people previously assigned to the radiation risk group, as well as the identification of genetic disorders in the process of radiotherapy. The object of the study were 37 residents of districts, where at the beginning of this century radioactive sources were discovered, and 6 oncology patients in the course of radiotherapy. Chromosome disorders, the overall level of DNA cells single-stranded damage by comet-assay method and a method of level detection of buccal micronuclei in were investigated. The results showed heterogeneity of different organism response to irradiation. Determination of absorbed dose, identification of various genetic disorders in individuals exposed to identical doses of radiation, offers the opportunity to judge the individual biological effect and is very important for individual preventive activities.