CYP1A1-Inducing Potency and Cytotoxicity Test in the HEPA-1 Mouse Hepatoma Cell Line This bioassay utilizes cultured Hepa-lclc7 (Hepa-1) mouse hepatoma cells to assess the CYPlA1-inducing potency or cytotoxicity of pure test chemicals or environmental samples. In the Hepa-l induction test , the CYPlA1-inducing potency of the test sample is detected as increased aryl hydrocarbon hydroxylase (AHH) and 7-ethoxyresorufin O-deethylase (EROD) activities.
H-4-II-E Rat Hepatoma Cell Bioassay Protocol This bioassay utilises cultured H-4-II-E rat hepatoma cells to assess the aryl hydrocarbon hydroxylase (AHH) inducing potencies of planar aromatic hydrocarbons and/or contaminated environmental samples. The response of the cells to pure test chemicals or extracts of mixtures is compared with their response to the standard 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD).
In Vitro Prediction of the Maximum Tolerated Dose Protocol The results of cytotoxicity tests in primary cultures of rat hepatocytes and in MDBK and McCoy cells can be used to predict the in vivo 4-wk maximum tolerated dose in rats and dogs. A correlation between in vitro cytotoxicity, as measured in this system, and LD50 values in rats and mice has also been established.
Isolation of Rat Hepatocytes Protocol Collagenase perfusion of rat liver yields a hepatocyte suspension which may be exposed to test compounds in order to assess their effects on cell viability and enzyme leakage.