Abstract
Humans exhibit marked genetic polymorphisms in drug metabolism that contribute to high incidence of adverse effects in susceptible individuals due to altered balance between metabolic activation and detoxification. The T-cell cloning assay, which detects mutations in the gene for hypoxanthine-guanine phosphoribosyl transferase (HPRT), is the most well-developed reporter system for studying specific locus mutation in human somatic cells. The assay is based on a mitogen- and growth factor-dependent clonal expansion of peripheral T-lymphocytes in which the 6-thioguanine-resistant HPRT mutants can be selected, enumerated, and collected for molecular analysis of the mutational nature. The assay provides a unique tool for studying in vivo and in vitro mutagenesis, for investigating the functional impact of common polymorphism in metabolism and repair genes, and for identifying risk genotypes for drug-induced toxicity and mutagenicity. This chapter presents a simple and reliable method for the enumeration of HPRT mutant frequency induced in vitro without using any source of recombinant interleukin-2. The other main feature is that only truly induced and unique mutants are collected for further analysis.
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© 2014 Humana Press
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Hou, SM. (2014). The Human T-Cell Cloning Assay: Identifying Genotypes Susceptible to Drug Toxicity and Somatic Mutation. In: Keohavong, P., Grant, S. (eds) Molecular Toxicology Protocols. Methods in Molecular Biology, vol 1105. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-739-6_22
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DOI: https://doi.org/10.1007/978-1-62703-739-6_22
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