4 dimethylaminoazobenzene Animals Carcinogens Carcinoma, Hepatocellular Cell Cycle Cell Cycle Proteins Drug Administration Schedule Gene Expression Regulation, Enzymologic Gene Expression Regulation, Neoplastic Heme Oxygenase-1 Homeostasis Liver Neoplasms Male Mice Mice, Inbred Strains Western blotting animal cell animal experiment animal model animal tissue article carcinogen cell cycle protein cell type cellular distribution controlled study cyclin E cyclin dependent kinase 2 cyclin dependent kinase inhibitor 1 dietary intake