Czech J. Food Sci., 2006, 24(3):119-126 | DOI: 10.17221/3306-CJFS

Antimutagenic effect of genistein

Zdeňka Polívková¹, Martina Langová¹, Petr Šmerák¹, Jiřina Bártová², Ivo Bárta¹

¹ Division of General Biology and Genetics, Center of Biomedical Sciences and

² Division of General Hygiene, Center of Preventive Medicine, 3 rd Faculty of Medicine, Charles University, Prague, Czech Republic

A great variety of health benefits including the protection against breast and prostate cancers has been attributed to the soya consumption, because of the presence of soy beans isoflavones, genistein, and others. We investigated the antigenotoxic effect of genistein on the genotoxicity of three mutagens and carcinogens - aflatoxine B₁ (AFB₁), 2-amino-3-methylimidazo [4,5-f]quinoline (IQ), and N-nitroso-N-methylurea (MNU), using the Ames bacterial mutagenicity test and the micronucleus test. In the Ames test on Salmonella typhimurium, a significant antimutagenic effect was determined against the indirect mutagen AFB₁ in two strains, TA98 and TA100. However, the effect on the IQ indirect mutagenicity was more pronounced in the test with TA98 than with TA100. The mutagenicity of the direct mutagen MNU was suppressed by genistein only at its highest concentration used (300 µg/plate). The protective effect of genistein against all three mutagens was proved in the micronucleus test as the treatment of mice with the combinations of genistein and mutagens resulted in a significant reduction of the number of micronuclei in comparison with the number of micronuclei induced by the individual mutagens alone.

Keywords: chemoprevention; aflatoxin B1; 2-amino-3-methylimidazo [4,5-f]quinoline; N-nitroso-N-methylurea; Ames test; micronucleus test

Published: June 30, 2006  Show citation