Abstract
Cell transformation assays (CTAs) are in vitro carcinogenicity tests measuring morphological transformation of cells either as transformed colonies (SHE cells) or foci (C3H/10T1/2 and BALB/c 3T3 including Bhas 42 cells) derived from a single cell. CTAs such as Bhas 42 CTA can detect both genotoxic and non-genotoxic carcinogens. When used as an initiation assay to test tumor-initiating activity, cells at low density are treated with a test chemical for 3 days, whereas a promotion assay to test for tumor-promoting activity, near-confluent cells are treated with a test chemical for a period of 10 days. The Bhas 42 CTA has advantages compared with BALB/c 3T3 and other CTAs due to its simplicity, higher sensitivity, less time needed for assay performance, and robustness (exemplified by its adaptation to a high-throughput method). The Bhas 42 CTA has been validated together with other CTAs and recommended for development of an OECD guideline. The assay has already been applied in testing various chemical and physical agents including particles and nanomaterials. Protocols for both 6 and 96-well plate formats of initiation and promotion assays are described in detail.
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Acknowledgements
This work was supported by the EC FP7 QualityNano [INFRA-2010-1.131], contract no: 214547-2, EC FP7 NANoREG, [NMP.2012.1.3-3] contract no: 310584, and by the NEDO grant (New Energy and Industrial Technology Development Organization).
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Sasaki, K., Huk, A., Yamani, N.E., Tanaka, N., Dusinska, M. (2014). Bhas 42 Cell Transformation Assay for Genotoxic and Non-Genotoxic Carcinogens. In: Sierra, L., Gaivão, I. (eds) Genotoxicity and DNA Repair. Methods in Pharmacology and Toxicology. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-1068-7_20
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DOI: https://doi.org/10.1007/978-1-4939-1068-7_20
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