Carcinogenesis, Teratogenesis & Mutagenesis ›› 2016, Vol. 28 ›› Issue (5): 398-402.doi: 10.3969/j.issn.1004-616x.2016.05.013

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Comparative evaluation of mutagenicity of four aristolochic acids components using the Ames fluctuation test

CAO Yiyi1, LIU Qian2, XI Jing1, MA Leilei1, LIU Xiaojian3, LUAN Yang1   

  1. 1. Hongqiao International Institute of Medicine, Faculty of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025;
    2. Shanghai Nature Standard R & D and Biotech Co. Ltd., Shanghai 201203;
    3. Department of Medical Oncology, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China
  • Received:2016-01-06 Revised:2016-07-05 Online:2016-09-30 Published:2016-09-30

Abstract: OBJECTIVE: To compare the mutagenicity among four components of aristolochic acid (AA-I,AA-Ⅱ,AA-Ⅲ and AA-IV) using the Ames fluctuation test,and to evaluate the relationship between toxicity mechanisms and molecular structures of aristolochic acid. METHODS: Two Salmonella typhimurium tester strains (TA98 and TA100) were employed to perform the Ames fluctuation test in the absence and presence of the S9 exogenous metabolic activation system. RESULTS: The mean number of revertant wells of AA-I and AA-Ⅱ were significantly increased in tester strains TA98 and/or TA100,with and without S9 (P<0.05). AA-Ⅱ showed a clear dose-response increase and the fold inductions in mean number of revertant wells over the baseline of AA-Ⅱ and more than AA-I. Both AA-Ⅲ and AA-IV did not induce significant increase with the two test strains,but AA-IV showed a trend of dose-response increase. CONCLUSION: AA-I and AA-Ⅱ were mutagenic with or without metabolic activation,and the mutagenicity of AA-Ⅱ was stronger than that of AA-I. AA-IV demonstrated mutagenicity with metabolic activation. AA-Ⅲ did not show mutagenicity in the two tester strains. The four aristolochic acids exhibited different levels of mutagenicity which might be due to their different structural and metabolic characteristics.

Key words: aristolochic acid, Ames fluctuation test, genotoxicity, mutagenicity

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