The Modifying Effect of Co-Mutagens on the Frequency and Spectrum of Radiation-Induced Chromosome Aberrations in Human Cells

Copyright: © 2015 Domina E et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Abstract We have studied the co-mutagenic effect of verapamil and ascorbic acid on formation of radiation-induced chromosomal aberrations in T-lymphocytes of peripheral blood (PBL) of healthy donors. Test system of PBL treated in vitro with subsequent metaphase analysis of chromosomal aberrations has been used. Cells were exposed to γ-ray radiation in G0and G2periods of cell cycle and treated with verapamil (1.5; 2 and 4.0 μg/ml of blood) and ascorbic acid (20; 40 and 80 μg/ml of blood). The post-irradiation treatment of PBL with ascorbic acid in concentrations of 40 and 80 μg/ml, which exceeded therapeutic concentration value 2 and 4 times, increased overall chromosome aberrations frequency in 1.4 times compared to low dose (0.3 Gy) radiation effect. Verapamil at a concentration of 4.0μg/ml also increased the damaging effect of low dose of radiation in 1.5 times. Modification of radiation-induced cytogenetic effects in human PBL treated with co-mutagens was dependent on the concentration of the drugs, the absorbed dose of radiation, as well as cell radiosensitivity. It could be concluded that high concentrations of comutagens potentiate the damaging effect of low doses of ionizing radiation. The Modifying Effect of Co-Mutagens on the Frequency and Spectrum of Radiation-Induced Chromosome Aberrations in Human Cells