Regulation of 17-beta hydroxysteroid dehydrogenase type 2 in human placental endothelial cells

Emily J. Su, You Hong Cheng, Robert T. Chatterton, Zhi Hong Lin, Ping Yin, Scott Reierstad, Joy Innes, Serdar E. Bulun*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


17-beta hydroxysteroid dehydrogenase type 2 (HSD17B2) oxidizes estradiol to estrone, testosterone to androstenedione, and 20 alpha-dihydroprogesterone to progesterone. HSD17B2 is highly expressed in human placental tissue where it is localized to placental endothelial cells lining the fetal compartment. The aim of this study was to investigate the effects of potential regulatory factors including progesterone, estradiol, and retinoic acid (RA) onHSD17B2 expression in primary human placental endothelial cells in culture.HSD17B2 mRNA expression was not regulated by progesterone, the progesterone agonist R5020, or estradiol treatment. RA significantly induced HSD17B2 mRNA levels and enzyme activity in a dose- and time-dependent manner. Maximal stimulation occurred at Hour 48 at an RA concentration of 10-6 M. Both retinoic acid receptor alpha (RARA) and retinoid X receptor alpha (RXRA) were readily detected by immunoblotting in isolated placental endothelial cells. RNA interference directed against RARA or RXRA led to reduced basal levels of HSD17B2 mRNA levels and significantly abolished RA-stimulated HSD17B2 expression. Together, these data indicate that regulation of HSD17B2 mRNA levels and enzymatic activity by RA in the placenta is mediated by RARA and RXRA.

Original languageEnglish (US)
Pages (from-to)517-525
Number of pages9
JournalBiology of reproduction
Issue number3
StatePublished - Sep 2007


  • Placenta
  • Pregnancy
  • Steroid hormone receptors
  • Steroid hormones

ASJC Scopus subject areas

  • Reproductive Medicine
  • Cell Biology

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