Involvement of GR and p300 in the induction of H6PD by cortisol in human amnion fibroblasts

Weihua Wang, Chunming Guo, Wenjiao Li, Jianneng Li, Wangsheng Wang, Leslie Myatt, Kang Sun

Research output: Contribution to journalArticle

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Abstract

Human fetal membranes express 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1), which reduces biologically inert cortisone to active cortisol and may provide an extraadrenal source of cortisol mediating fetal development and parturition. The reductase activity of 11β-HSD1 depends on the availability of the cofactor reduced form of nicotinamide adenine dinucleotide phosphate (NADPH) derived from the enzymatic activity of hexose-6- phosphodehydrogenase (H6PD). Based on the feed-forward induction of 11β-HSD1 by glucocorticoids in human fetal membranes, we hypothesize that glucocorticoids simultaneously induce H6PD in the fetal membranes. We found a parallel distribution of H6PD and 11β-HSD1 in the amnion, chorion, and decidua. In cultured human amnion fibroblasts, small interfering RNA-mediated knockdown of H6PD expression significantly attenuated the conversion of cortisone to cortisol. Cortisol (0.01-1 μM) induced H6PD expression in a concentration-dependent manner, which was attenuated by glucocorticoid receptor (GR) antagonist RU486. Cortisol induced the expression of p300, a histone acetyltransferase, whereas C646, an inhibitor of p300, attenuated the induction of H6PD by cortisol. Coimmunoprecipitation revealed GR and p300 in the same nuclear protein complex upon cortisol stimulation. Chromatin immunoprecipitation showed that cortisol increased the binding of p300 and GR to H6PD promoter and the acetylation of histone 3 lysine 9 on the promoters. In conclusion, the induction of H6PD by cortisol requires the participation of GR and p300 as well as the acetylation of H3K9 by p300. This may be a prerequisite for the parallel induction of reductase activity of 11β-HSD1 in human amnion fibroblasts in a feed-forward loop that may influence fetal development and the onset of parturition.

Original languageEnglish (US)
Pages (from-to)5993-6002
Number of pages10
JournalEndocrinology
Volume153
Issue number12
DOIs
StatePublished - Dec 1 2012

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Amnion
Hexoses
Glucocorticoid Receptors
Hydrocortisone
11-beta-Hydroxysteroid Dehydrogenases
Fibroblasts
Extraembryonic Membranes
Cortisone
Acetylation
Fetal Development
Glucocorticoids
Oxidoreductases
Parturition
Histone Acetyltransferases
Chorion
Decidua
Chromatin Immunoprecipitation
Nuclear Proteins
NADP
Histones

ASJC Scopus subject areas

  • Endocrinology

Cite this

Wang, W., Guo, C., Li, W., Li, J., Wang, W., Myatt, L., & Sun, K. (2012). Involvement of GR and p300 in the induction of H6PD by cortisol in human amnion fibroblasts. Endocrinology, 153(12), 5993-6002. https://doi.org/10.1210/en.2012-1531

Involvement of GR and p300 in the induction of H6PD by cortisol in human amnion fibroblasts. / Wang, Weihua; Guo, Chunming; Li, Wenjiao; Li, Jianneng; Wang, Wangsheng; Myatt, Leslie; Sun, Kang.

In: Endocrinology, Vol. 153, No. 12, 01.12.2012, p. 5993-6002.

Research output: Contribution to journalArticle

Wang, W, Guo, C, Li, W, Li, J, Wang, W, Myatt, L & Sun, K 2012, 'Involvement of GR and p300 in the induction of H6PD by cortisol in human amnion fibroblasts', Endocrinology, vol. 153, no. 12, pp. 5993-6002. https://doi.org/10.1210/en.2012-1531
Wang, Weihua ; Guo, Chunming ; Li, Wenjiao ; Li, Jianneng ; Wang, Wangsheng ; Myatt, Leslie ; Sun, Kang. / Involvement of GR and p300 in the induction of H6PD by cortisol in human amnion fibroblasts. In: Endocrinology. 2012 ; Vol. 153, No. 12. pp. 5993-6002.
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