title: Expression analysis of estrogen-metabolizing enzymes in human endometrial cancer.
abstract: Estrogen-dependent endometrial cancer is related to unopposed and prolonged estrogen stimulation. We examined the expression of estrogen-metabolizing enzymes in correlation with the ERalpha and ERbeta estrogen receptors in human endometrial Ishikawa adenocarcinoma cells and in endometrial cancer specimens and adjacent normal endometrium from the same patients. Real-time PCR analysis revealed that both estrogen receptors and selected estrogen-metabolizing enzymes were expressed in the Ishikawa cells and in endometrial tissue. We detected higher expression of ERalpha than ERbeta, higher expression of sulfatase than sulfotransferase and low expression of aromatase in the Ishikawa cells and the tissue, as well as higher levels of type 2 17beta-hydroxysteroid dehydrogenase (17beta-HSD) in normal and diseased tissue than in the Ishikawa cells. When we compared the expression in endometrial cancer samples and in the adjacent normal endometrium, ERalpha and ERbeta, sulfatase and sulfotransferase were seen to be downregulated in the majority of the cancerous tissue specimens.
authors.affiliation: Institute of Biochemistry, Medical Faculty, University of Ljubljana, Vrazov trg 2, 1000 Ljubljana, Slovenia.
authors.forename: Tina
authors.initials: T
authors.lastname: Smuc
authors.forename: Ruth
authors.initials: R
authors.lastname: Rupreht
authors.forename: Jasna
authors.initials: J
authors.lastname: Sinkovec
authors.forename: Jerzy
authors.initials: J
authors.lastname: Adamski
authors.forename: Tea Lanisnik
authors.initials: TL
authors.lastname: Rizner
mesh_terms: D015067:17-Hydroxysteroid Dehydrogenases / Q000235:genetics* / Q000378:metabolism; D000230:Adenocarcinoma / Q000201:enzymology* / Q000235:genetics; D016889:Endometrial Neoplasms / Q000201:enzymology* / Q000235:genetics; D004960:Estradiol Dehydrogenases; D047628:Estrogen Receptor alpha / Q000235:genetics / Q000378:metabolism; D047629:Estrogen Receptor beta / Q000235:genetics / Q000378:metabolism; D004967:Estrogens / Q000378:metabolism*; D005260:Female; D006801:Humans; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000032:analysis / Q000378:metabolism; D015238:Sulfotransferases / Q000235:genetics* / Q000378:metabolism; D014407:Tumor Cells, Cultured
chemical_list: D047628:Estrogen Receptor alpha; D047629:Estrogen Receptor beta; D004967:Estrogens; D012333:RNA, Messenger; D015067:17-Hydroxysteroid Dehydrogenases; D004960:Estradiol Dehydrogenases; C523763:HSD17B2 protein, human; D015238:Sulfotransferases