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 phospho-ribosyl 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.
CITATION STYLE
Hou, S. M. (2014). The human T-cell cloning assay: Identifying genotypes susceptible to drug toxicity and somatic mutation. Methods in Molecular Biology, 1105, 283–289. https://doi.org/10.1007/978-1-62703-739-6_22
Mendeley helps you to discover research relevant for your work.