title: 17 beta-Hydroxysteroid dehydrogenase type 1 and type 2 in ductal carcinoma in situ and intraductal proliferative lesions of the human breast.
abstract: 17 beta-hydroxysteroid dehydrogenases (17 beta-HSDs) are involved in the interconversion of biologically active and inactive sex steroids and are considered to play important roles in the in situ metabolism of estrogen in various estrogen dependent tissues. 17 beta-HSD type 1 catalyzes primarily the reduction of estrone (E1) to estradiol (E2), whereas 17 beta-HSD type 2 catalyzes primarily the oxidation of E2 to E1. However, the possible biological roles of these estrogen metabolizing isozymes in human breast cancer, especially in carcinogenesis of the human breast, have not been examined in detail. Because of the potential roles of estrogens in the early stages of human breast carcinogenesis, we have examined the immunolocalization of 17 beta-HSD type 1 and type 2 isozymes and estrogen receptor alpha(ER alpha) in both normal human breast tissue and in breast cancers, including ductal carcinoma in situ (DCIS), proliferative disease without atypia (PDWA) or fibrocystic disease and atypical ductal hyperplasia (ADH). We also correlated these findings with clinicopathological findings, Ki67 antigen, progesterone receptor (PR), c-erbB-2, and p53. 17 beta-HSD type 2 immunoreactivity was sporadically detected in non-proliferative or Ki67 negative ductal epithelia of normal breast, but rarely in breast carcinoma cells. 17 beta-HSD type 1 immunoreactivity was detected in 12/22 (54.5%) PDWA cases, 8/26 (30.8%) ADH cases, and 25/40 (62.5%) DCIS cases, respectively. 17 beta-HSD type 1 immunoreactivity was not statistically correlated with the age of the patients, Ki67 labeling index (LI), and PR LI, p-53 and c-erbB-2 immunoreactivity. There was no significant correlation between ER alpha LI and 17 beta-HSD type 1 immunoreactivity. There was a positive correlation between ER alpha and Ki67 LI in PDWA, whereas a negative correlation was detected between ER alpha and Ki67 LI in DCIS. There was no correlation between ER alpha and Ki67 LI in ADH. These results suggest that in human breast epithelial cells, development of ADH and DCIS may be associated with the loss and/or deviation of oestrogen dependent regulation of cell proliferation.
authors.affiliation: Department of Pathology, Tohoku University School of Medicine, Sendai, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Ariga
authors.forename: T
authors.initials: T
authors.lastname: Moriya
authors.forename: T
authors.initials: T
authors.lastname: Suzuki
authors.forename: M
authors.initials: M
authors.lastname: Kimura
authors.forename: N
authors.initials: N
authors.lastname: Ohuchi
authors.forename: S
authors.initials: S
authors.lastname: Satomi
authors.forename: H
authors.initials: H
authors.lastname: Sasano
mesh_terms: D015067:17-Hydroxysteroid Dehydrogenases / Q000032:analysis*; D000328:Adult; D001940:Breast / Q000201:enzymology / Q000473:pathology; D001943:Breast Neoplasms / Q000201:enzymology / Q000473:pathology* / Q000601:surgery; D002278:Carcinoma in Situ / Q000201:enzymology / Q000473:pathology* / Q000601:surgery; D002285:Carcinoma, Intraductal, Noninfiltrating / Q000201:enzymology / Q000473:pathology* / Q000601:surgery; D047628:Estrogen Receptor alpha; D005260:Female; D005348:Fibrocystic Breast Disease / Q000201:enzymology / Q000473:pathology*; D006801:Humans; D006965:Hyperplasia; D007150:Immunohistochemistry; D007527:Isoenzymes / Q000032:analysis; D019394:Ki-67 Antigen / Q000032:analysis; D008875:Middle Aged; D009367:Neoplasm Staging; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000032:analysis; D011960:Receptors, Estrogen / Q000032:analysis; D011980:Receptors, Progesterone / Q000032:analysis; D016159:Tumor Suppressor Protein p53 / Q000032:analysis
chemical_list: D015067:17-Hydroxysteroid Dehydrogenases; D047628:Estrogen Receptor alpha; D007527:Isoenzymes; D019394:Ki-67 Antigen; D018719:Erb-b2 Receptor Tyrosine Kinases; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D016159:Tumor Suppressor Protein p53; C044256:3 (or 17)-beta-hydroxysteroid dehydrogenase