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.
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<p>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.</p>
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Okayama University Medical School | 論文
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