title: Relationship of ornithine decarboxylase activity and histological findings in human hepatocellular carcinoma.
abstract: To evaluate the correlation between the polyamine metabolism and the degree of malignancy in hepatocellular carcinoma, we measured ornithine decarboxylase activity and polyamine concentrations in neoplastic tissue and adjacent noncancerous tissue from resected specimens of liver from 30 patients. Ornithine decarboxylase activity, polyamines (putrescine, spermidine and spermine) and ornithine decarboxylase mRNA levels were significantly higher in hepatoma tissue than in noncancerous tissue. The activity of this enzyme in the tumor tissue had a negative correlation with the histological degree of differentiation judged according to a modification of the Edmondson and Steiner classification. Resected hepatoma tissue was stained immunohistochemically with antibodies for proliferating cell nuclear antigen (also called cyclin), a marker of cell proliferation. We noted correlation between ornithine decarboxylase activity and the number of cells stained for this antigen (r = 0.882, p < 0.001). These results indicate that ornithine decarboxylase activity is high in human hepatocellular carcinoma, leading to increased intracellular concentrations of polyamines. Ornithine decarboxylase activity also reflected the rate of tumor proliferation and was correlated with the histological findings.
authors.affiliation: Third Department of Internal Medicine, Osaka City University Medical School, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Tamori
authors.forename: S
authors.initials: S
authors.lastname: Nishiguchi
authors.forename: T
authors.initials: T
authors.lastname: Kuroki
authors.forename: S
authors.initials: S
authors.lastname: Seki
authors.forename: K
authors.initials: K
authors.lastname: Kobayashi
authors.forename: H
authors.initials: H
authors.lastname: Kinoshita
authors.forename: S
authors.initials: S
authors.lastname: Otani
mesh_terms: D000328:Adult; D000368:Aged; D006528:Carcinoma, Hepatocellular / Q000201:enzymology* / Q000473:pathology*; D002454:Cell Differentiation; D002455:Cell Division; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008113:Liver Neoplasms / Q000201:enzymology* / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009955:Ornithine Decarboxylase / Q000235:genetics / Q000378:metabolism*; D011073:Polyamines / Q000378:metabolism; D018809:Proliferating Cell Nuclear Antigen / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism
chemical_list: D011073:Polyamines; D018809:Proliferating Cell Nuclear Antigen; D012333:RNA, Messenger; D009955:Ornithine Decarboxylase