Rat Hepatocyte Primary Cell Culture-Mediated Mutagenesis of Adult Rat Liver Epithelial Cells by Procarcinogens

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Abstract
Rat hepatocyte primary cell (HPC) cultures which were unable to be subcultured were used as a metabolizing feeder system for established lines of adult rat liver (ARL) cultures in studies of procarcinogen-induced mutagenesis. Treatment of a mixed culture of HPC and ARL cells with 7,12-dimethylbenz(a)anthracene, dimethylnitrosamine or 2-acetylaminofluorene for 24 h resulted in an increase in the incidence of 8-azaguanine-resistant mutants that was not observed with treatment of ARL cells alone. HPC cultures can be used as a feeder system for enhancing mutagenesis in established lines of ARL cells by procarcinogens requiring metabolic activation.