title: Cytological alteration of cultured rat liver cells by 3'-methyl-4-dimethylaminoazobenzene with special reference to chromosome changes, changes of growth patterns at a colony level and alpha-fetoprotein production.
abstract: A near diploid clone derived from a rat liver cell line was continuously treated with various concentrations of 3'-methyl-4-dimethylaminoazobenzene (3'-Me-DAB) in culture. By treatment with 2.8 micrograms/ml, cells with 41 chromosomes formed a mode and which then shifted to 39. The chromosome numbers of cells treated with 5.4 micrograms/ml were widely distributed at early stages, but later the mode shifted to hypotetraploid region. Untreated control cells were confirmed as near diploid. Increased plating efficiency by 3'-Me-DAB as well as the appearance of large sized colonies was obtained. The production of alpha-fetoprotein (AFP) by the cells was slightly enhanced by treatment with 3'-Me-DAB. The cells treated with and without 3'-Me-DAB did not produce any tumor in rats 6 months after their intraperitoneal injection.
mesh_terms: D000818:Animals; D002455:Cell Division / Q000187:drug effects; D002460:Cell Line; D002869:Chromosome Aberrations; D008099:Liver / Q000166:cytology*; D008749:Methyldimethylaminoazobenzene / Q000494:pharmacology*; D051381:Rats; D000509:alpha-Fetoproteins / Q000096:biosynthesis*; D004124:p-Dimethylaminoazobenzene / Q000031:analogs & derivatives*
chemical_list: D000509:alpha-Fetoproteins; D008749:Methyldimethylaminoazobenzene; D004124:p-Dimethylaminoazobenzene