[Chromosome aberrations in the cells of monkeys that have undergone acute irradiation with the use of chemical protection].

The rate and type of chromosomal aberrations in the bone marrow cells and circulating lymphocytes of the gamma-irradiated monkeys prophylactically treated with cystamine and mexamine 5-10 minutes before the irradiation was studied. The number of chromosomal aberrations 9-10 years after the gamma-irradiation (600-650 r) of the protected monkeys was similar to that in the animals irradiated without protection. Symmetrical chromosomal changes were most freuqent in all the monkeys long after the irradition, including the animals treated with radioprotectors.