Abstract

Genotoxicity of a widely used estrogen, Mestranol, was undertaken using in vitro, in vivo and host-mediated assay with bacteria as indicator organism. Analyses of chromosome aberrations and sister chromatid exchanges (SCEs) in human lympocytes and chromosome aberrations, micronuclei and sister chromatid exchanges (SCEs) in bone-marrow cells of mice showed the drug to be capable of attacking the genetic material. However, both Ames Salmonella/S9 assay with and without S9 mix and host-mediated assay using same tester strains of Salmonella, did not show any significant increase/decrease in the His + revertants.

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