The purification of cooking mutagens depends on the extraordinary sensitivity of the Ames/Salmonella mutagenicity test and its usefulness for tracking the mutagens during the purification steps.
Studies have indicated that foods exposed to drying, frying, roasting, baking, and broiling conditions possess net mutagenic activity as assessed by the Ames/Salmonella/microsome mutagenicity test and the chromosome aberration assay with Chinese hamster ovary (CHO) cells.
Yang et al. (2008) compiled a group of 2,428 compounds, each of which has structural information and data for six mutagenicity tests, and showed that the percentage of industrial chemicals that were mutagenic was greater than that of chemicals used as drugs or food ingredients.
To work out the biosafety of the butanolic extract and purified compound they were subjected to Ames mutagenicity test and MTT cytotoxicity assay.
The following bioassays were performed in urine samples: a) mutagenicity test and concentration of thioethers as markers of exposure, and b) excretion of D-glucaric acid and 6-beta-hydroxycortisol (related to 17-hydroxycorticosteroid excretion) as indicators of the inductive status of the microsomal enzyme system (phase-I).
It has also been widely used for molecular cytotaxonomy, for example of primates (Muller et al. 1999; Wienberg et al. 1990), mutagenicity testing (Marshall and Obe 1998) and radiation biology (Gray et al. 1992).
Recent advances in genetic toxicity (mutagenicity) testing methods and in approaches to performing risk assessment are prompting a renewed effort to harmonize genotoxicity risk assessment across the world.
Research in key areas such as mutagenicity testing of water and characterization of chlorination and ozonation by-products has emphasized the need for techniques suitable for analysis of the remaining nonvolatile organics.
It should be noted that different sets of filters were used for the mutagenicity and chemical studies and that the PAH and NPAH concentrations of the PM samples used for the mutagenicity testing were measured and directly compared to the results from the Salmonella assay.
The key goal of the present work was to provide underpinning for results from mutagenicity testing, by isolating and identifying metabolites from S9 treatments.
