Radiation-induced chromosomal instability of human lymphocytes as a marker of breast cancer risk

Inter-individual variation of G2 chromosome aberration yields was significantly higher in comparison with G0 chromosomal radiosensitivity in both examined groups. According to G2 assay the fraction of individuals with elevated chromosomal radiosensitivity among healthy women and BC patients was 11.4 and 38 %, respectively. The results obtained support the concept of association between predisposition to BC, radiation-induced G2 chromosomal instability and efficiency of DNA repair activated by cell irradiation in G2 phase. It is assumed that individuals with elevated G2 aberration scores from the control group need further examinations on the BC risk and primary prevention of radiation induced cancer