Some properties and electrophoretic patterns of rat liver esterases in relation to hepatocarcinogenesis by 3'-methyl-4-(dimethylamino) azobenzene. 1976

A Kaneko, and Y Yoshida, and S Yokoyama, and K Dempo, and T Onoé

Five distinctly different types of naphthyl acetate esterase in rat liver were examined for study of liver enzymes during hepatocarcinogenesis. Three types of esterase in normal adult liver were separated by column chromatography. Main esterase in adult hepatocytes, which was demonstrated near the origin in cellulose acetate electrophoresis, was very sensitive to diisopropyl phosphorofluoridate (DFP). The other two esterases showed different electrophoretic mobility, while their Km values did not differ and both were considerably resistant to DFP. An anodic minor component in normal adult liver, which had a characteristic esterase pattern of infant liver, increased in the liver of rats fed 3'-methyl-4-(dimethylamino) azobenzene. This esterase was obtained by electrophoresis on Cellogel block. It was partially inhibited by DFP and p-chloromercuribenzoate, activated by cysteine, and showed a different Km value from the above esterases. Another minor component situated at the most cathodic side, which had characteristic esterase patterns of fetal liver and hepatoma, was very sensitive to DFP and eserine, and showed a characteristic of nonspecific cholinesterase as proved by staining.

UI MeSH Term Description Entries
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D008113 Liver Neoplasms Tumors or cancer of the LIVER. Cancer of Liver,Hepatic Cancer,Liver Cancer,Cancer of the Liver,Cancer, Hepatocellular,Hepatic Neoplasms,Hepatocellular Cancer,Neoplasms, Hepatic,Neoplasms, Liver,Cancer, Hepatic,Cancer, Liver,Cancers, Hepatic,Cancers, Hepatocellular,Cancers, Liver,Hepatic Cancers,Hepatic Neoplasm,Hepatocellular Cancers,Liver Cancers,Liver Neoplasm,Neoplasm, Hepatic,Neoplasm, Liver
D008297 Male Males
D008749 Methyldimethylaminoazobenzene A very potent liver carcinogen. MeDAB,3'-Methyl-4-dimethylaminoazobenzene,Dimethyl-p-(m-tolylazo)aniline,3' Methyl 4 dimethylaminoazobenzene
D009280 Naphthaleneacetic Acids Naphthalene derivatives containing the -CH2CCO2H radical at the 1-position, the 2-position, or both. Compounds are used as plant growth regulators to delay sprouting, exert weed control, thin fruit, etc. Acids, Naphthaleneacetic
D009374 Neoplasms, Experimental Experimentally induced new abnormal growth of TISSUES in animals to provide models for studying human neoplasms. Experimental Neoplasms,Experimental Neoplasm,Neoplasm, Experimental
D002802 Cholinesterases Acylcholineacylhydrolase,Cholase,Cholinesterase
D003545 Cysteine A thiol-containing non-essential amino acid that is oxidized to form CYSTINE. Cysteine Hydrochloride,Half-Cystine,L-Cysteine,Zinc Cysteinate,Half Cystine,L Cysteine
D004124 p-Dimethylaminoazobenzene A reagent used mainly to induce experimental liver cancer. According to the Fourth Annual Report on Carcinogens (NTP 85-002, p. 89) published in 1985, this compound "may reasonably be anticipated to be a carcinogen." (Merck, 11th ed) Butter Yellow,Dimethylaminoazobenzene,4-Dimethylaminoazobenzene,Methyl Yellow,p-Dimethylaminoazobenzene, (E)-Isomer,p-Dimethylaminoazobenzene, (Z)-Isomer,4 Dimethylaminoazobenzene,p Dimethylaminoazobenzene
D004588 Electrophoresis, Cellulose Acetate Electrophoresis in which cellulose acetate is the diffusion medium. Cellulose Acetate Electrophoreses,Cellulose Acetate Electrophoresis,Electrophoreses, Cellulose Acetate

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