title: Immunohistochemical study on epidermal growth factor (EGF) receptor during carcinogenesis in the rat liver.
abstract: The expression and localization of epidermal growth factor (EGF) receptor were investigated immunohistochemically using anti-EGF receptor antibody in the normal rat liver and 3'-methyl-4-dimethylaminoazobenzen (3'-Me-DAB) induced tumors in rats. In 8 weeks after 3'-Me-DAB treatment, multiple nodules of cholangiocarcinoma were found in the rat liver, and atypical nodules of hepatocytes were also found 14 weeks later. Immunoreactive products against EGF receptor were only slightly positive in the normal liver, the nodule of cholangiocarcinoma, and atypical nodule of hepatocytes. It was noted that EGF receptor immunoreactivity was more intense in non-cancerous tissue adjacent to tumorous nodules than in the cancerous tissue. The present finding suggests that the expression of EGF receptor may be associated with regenerating as well as carcinogenetic processes in the rat liver.
authors.affiliation: First Department of Surgery, Faculty of Medicine, Kyoto University, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Minote
authors.forename: K
authors.initials: K
authors.lastname: Inoue
authors.forename: S
authors.initials: S
authors.lastname: Higashide
authors.forename: T
authors.initials: T
authors.lastname: Tobe
authors.forename: E
authors.initials: E
authors.lastname: Takeuchi
authors.forename: C
authors.initials: C
authors.lastname: Mori
authors.forename: K
authors.initials: K
authors.lastname: Shiota
mesh_terms: D002759:Adenoma, Bile Duct / Q000139:chemically induced / Q000378:metabolism; D000818:Animals; D066246:ErbB Receptors / Q000378:metabolism*; D007150:Immunohistochemistry; D008099:Liver / Q000378:metabolism*; D008114:Liver Neoplasms, Experimental / Q000139:chemically induced / Q000378:metabolism*; D008297:Male; D008749:Methyldimethylaminoazobenzene; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D008749:Methyldimethylaminoazobenzene; D066246:ErbB Receptors