title: 17Beta-hydroxysteroid dehydrogenase type 1 and type 2 in human breast carcinoma: a correlation to clinicopathological parameters.
abstract: The expression of 17beta-hydroxysteroid dehydrogenase (17beta-HSD) type 1 and type 2 was examined immunohistochemically in 111 invasive ductal carcinomas, and correlated with various clinicopathological parameters. This study investigates local regulatory mechanisms of oestrogens in human breast carcinoma. 17Beta-HSD type 1 was immunolocalized in carcinoma cells of 68 out of 111 invasive ductal carcinoma cases (61.3%). 17Beta-HSD type 2 immunoreactivity was not detected in all cases examined. A significant inverse correlation was observed between the immunohistochemical expression of 17beta-HSD type 1 and histological grade of the carcinoma (P < 0.02). There was a significant correlation between 17beta-HSD type 1 and oestrogen receptor (ER) labelling index (LI) (P < 0.05). In addition, carcinoma cells expressing immunoreactive 17beta-HSD type 1 were frequently positive for ER. 17Beta-HSD type 1 was also correlated with progesterone receptor (PR) LI (P < 0.05). There was a significant inverse correlation between 17beta-HSD type 1 and Ki-67 LI (P < 0.0001). No significant correlations were detected between 17beta-HSD type 1 and other clinicopathological parameters, including patient age, menopausal status, stage, tumour size, lymph node status and prognosis. This study suggests that 17beta-HSD type 1 plays an important role in the regulation of in situ oestradiol production in hormone-dependent breast carcinomas.
authors.affiliation: Department of Pathology, Tohoku University School of Medicine, Sendai, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Suzuki
authors.forename: T
authors.initials: T
authors.lastname: Moriya
authors.forename: N
authors.initials: N
authors.lastname: Ariga
authors.forename: C
authors.initials: C
authors.lastname: Kaneko
authors.forename: M
authors.initials: M
authors.lastname: Kanazawa
authors.forename: H
authors.initials: H
authors.lastname: Sasano
mesh_terms: D015067:17-Hydroxysteroid Dehydrogenases / Q000378:metabolism*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000201:enzymology* / Q000473:pathology; D018270:Carcinoma, Ductal, Breast / Q000378:metabolism* / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007527:Isoenzymes / Q000378:metabolism*; D019394:Ki-67 Antigen / Q000378:metabolism; D008875:Middle Aged; D011379:Prognosis
chemical_list: D007527:Isoenzymes; D019394:Ki-67 Antigen; D015067:17-Hydroxysteroid Dehydrogenases; C044256:3 (or 17)-beta-hydroxysteroid dehydrogenase