title: [Regulation of human 17 beta-hydroxysteroid dehydrogenase type 1 expression by cyclic adenosine 3',5'-monophosphate in choriocarcinoma cells].
abstract: Human 17 beta-hydroxysteroid dehydrogenase type 1 (17 HSD type 1), encoded by HSD 17 B 1 gene, is a steroidogenic enzyme catalyzing the interconversion of estrone and estradiol. In this study, we investigated the role of cyclic adenosine 3', 5'-monophosphate (cAMP) in the regulation of 17 HSD type 1 expression in cultured choriocarcinoma cell lines. Treatment with 8-bromo-cAMP increased 17-HSD type 1 protein concentration in JAR and JEG-3 cells, and the induction was accompanied by parallel increase of 1.3 kb 17 HSD type 1 mRNA expression. Reporter gene analysis revealed that the activity of HSD 17 B 1 promoter in JAR and JEG-3 cells was induced by cAMP and that the region participating in transmission of cAMP effect is situated in the position between -659 and -550 in HSD 17 B 1 gene. The consequent electrophoretic mobility shift assay showed that this region formed specific DNA-protein complexes with nuclear extracts prepared from JAR, JEG-3, T-47 D and HeLa cells. The data provide the first evidence that HSD 17 B 1 gene transcription is activated by cAMP in choriocarcinoma cells.
authors.affiliation: Biocenter Oulu, University of Oulu, Finland.
authors.forename: Y S
authors.initials: YS
authors.lastname: Piao
authors.forename: P
authors.initials: P
authors.lastname: Hellevi
authors.forename: J L
authors.initials: JL
authors.lastname: Eloisa
authors.forename: V
authors.initials: V
authors.lastname: Reijo
mesh_terms: D002822:Choriocarcinoma / Q000201:enzymology* / Q000473:pathology; D000242:Cyclic AMP / Q000494:pharmacology; D005260:Female; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D006913:Hydroxysteroid Dehydrogenases / Q000096:biosynthesis* / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics; D014407:Tumor Cells, Cultured / Q000378:metabolism; D014594:Uterine Neoplasms / Q000201:enzymology* / Q000473:pathology
chemical_list: D012333:RNA, Messenger; D000242:Cyclic AMP; D006913:Hydroxysteroid Dehydrogenases; C035507:3(17)-hydroxysteroid dehydrogenase