alexa Mini mutagenicity test: a miniaturized version of the Ames test used in a prescreening assay for point mutagenesis assessment.
Toxicology

Toxicology

Journal of Drug Metabolism & Toxicology

Author(s): Flamand N, Meunier J, Meunier P, AgapakisCauss C

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Abstract The bacterial reverse mutagenicity test on Salmonella typhimurium, known as the Ames test, is widely used by regulatory agencies, academic institutions and chemical companies to assess the mutagenic potential of raw compounds. Several attempts have been made to miniaturise the Ames test in order to fit the industrial constraint of screening more products at the low quantities available. The major limitation of these miniaturised versions of the Ames test lies in the impossibility to work with all the six strains used in the regular Ames test, especially with those showing a low spontaneous revertant frequency. We describe here a mini version of the regulatory Ames test protocol that allows a significant reduction of the quantity of test substance needed (300 mg) but remains applicable to all Salmonella strains used in the regulatory protocol. In a preliminary study, 10 in-house chemical compounds have been evaluated in the Mini Mutagenicity Test (MMT) together with some positive control substances. A first set of historical data obtained in 1999 as well as the predictivity and the sensitivity of the MMT are presented and compared to those of the regular Ames test.
This article was published in Toxicol In Vitro and referenced in Journal of Drug Metabolism & Toxicology

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