Arsenic exposure is an issue of concern in developing countries, consequently leading to arsenicosis which has been implicated in the development of cancers. The stem bark of Adansonia digitata (SBAD) has many traditional medicinal uses. The aim of the present study was to assess the antigenotoxic and hepatoprotective effects of methanol extract of SBAD (MESBAD) against sodium arsenite - induced toxicities in Wistar rats. These were assessed using the micronucleus induction assay and liver function tests with histology respectively. Thirty (30) rats distributed into six groups of five animals each were used for the experiment. Negative control (distilled water and rat pellets only), positive control [2.5 mg/kg body weight of sodium arsenite (SA)]. Test animals were challenged with SA and treated with 300 or 400 mg/kg body weight of MESBAD. The phytochemical analysis was also carried out according to standard procedures. The SA significantly (p<0.05) increased the activities of aspartate aminotransferace (AST) and the number of micronucleated polychromatic erythrocytes (nMPCEs) induced in the bone marrow as compared with the negative control. Treatment with MESBAD significantly (p<0.05) reduced the activities of AST and nMPCEs induced, histopatological examination of the liver showed that MESBAD reduced the severe portal and central venous congestion induced by SA, phytochemical analysis showed that MESBAD possess high concentration of alkaloids, saponins, flavonoids and total polyphenols. Methanol extract of the stem bark of Adansonia digitata mitigates SA-induced toxicities probably through radical scavenging activities.
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