Abstract

A new method for the micronucleus test using peripheral blood reticulocytes stained supravitally using acridine orange-coated slides was evaluated in male CD-1 mice treated with ethyl methanesulfonate (EMS) at doses of 100, 200, 300, and 400 mg/kg. Peripheral blood samples were taken 0, 24, 48, 72, and 96 h after treatment from each mouse without killing. The frequencies of micronucleated reticulocytes increased dose-dependently with the peak at 48 h after treatment. These results indicate that, at least for EMS, the new method used here can be an alternative to the conventional method using bone marrow polychromatic erythrocytes.

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