Azadirachta indica extract (AIE) has been regarded as a promising source of environment-friendly organic materials owing to their low mammalian toxicity. However, quite a bit of research has been reported that AIE may cause clastogens in human lymphocytes. Therefore, this study was conducted to evaluate the antimutagenic and genotoxicity of two samples of AIE. Antimutagenic test was experimented by using bacterial reverse mutation test. In the bacterial reverse mutation test, five strains Salmonella Typhimurim of two samples of AIE in order to evaluate its mutagenic potential. Bacterial reverse mutation test was also performed on positive control and negative control groups in the presence of the metabolic activation system (S-9 mix) and metabolic non-activation system. In the chromosome aberration test, Chinese hamster lung cells were exposed to AIE for 6 or 24 h with BPS, or for 6 h with S-9 mix. Negative and positive control groups were experimented for chromosome aberration test. As a result, the number of mutated colonies induced by 4-NQO were reduced by AIE treatment in all strains, indicating that AIE may have antimutagenic effects. Bacterial reverse mutation and chromosomal aberration were not shown at all concentration of AIE, regardless of activation of the metabolic system. we concluded that two AIE samples used in this study have no genotoxic effects to human, according to the genotoxicity battery system suggested by ICH (International Conference on Harmonization). Keywords antimutagenic • azadirachta indica extract • bacterial reverse mutation test • chromosomal aberration test 서 론
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