FSH/LH-Dependent Upregulation of Ahr in Murine Granulosa Cells Is Controlled by PKA Signaling and Involves Epigenetic Regulation.

Autor: Matvere A; Department of Cell Biology, Institute of Molecular and Cell Biology, University of Tartu, Riia 23, 51010 Tartu, Estonia. antti.matvere@gmail.com., Teino I; Department of Cell Biology, Institute of Molecular and Cell Biology, University of Tartu, Riia 23, 51010 Tartu, Estonia. indrek.teino@ut.ee., Varik I; Department of Cell Biology, Institute of Molecular and Cell Biology, University of Tartu, Riia 23, 51010 Tartu, Estonia. inge.varik@gmail.com., Kuuse S; Department of Cell Biology, Institute of Molecular and Cell Biology, University of Tartu, Riia 23, 51010 Tartu, Estonia. skuuse@ebc.ee., Tiido T; Clinical Research Centre, National Centre of Translational and Clinical Research, University of Tartu, Ravila 19, 50411 Tartu, Estonia. tarmo.tiido@ut.ee., Kristjuhan A; Department of Cell Biology, Institute of Molecular and Cell Biology, University of Tartu, Riia 23, 51010 Tartu, Estonia. arnold.kristjuhan@ut.ee., Maimets T; Department of Cell Biology, Institute of Molecular and Cell Biology, University of Tartu, Riia 23, 51010 Tartu, Estonia. toivo.maimets@ut.ee.
Jazyk: angličtina
Zdroj: International journal of molecular sciences [Int J Mol Sci] 2019 Jun 23; Vol. 20 (12). Date of Electronic Publication: 2019 Jun 23.
DOI: 10.3390/ijms20123068
Abstrakt: The aryl hydrocarbon receptor (Ahr) is a ligand-activated transcription factor primarily known for its toxicological functions. Recent studies have established its importance in many physiological processes including female reproduction, although there is limited data about the precise mechanisms how Ahr itself is regulated during ovarian follicle maturation. This study describes the expression of Ahr in ovarian granulosa cells (GCs) of immature mice in a gonadotropin-dependent manner. We show that Ahr upregulation in vivo requires both follicle stimulating hormone (FSH) and luteinizing hormone (LH) activities. FSH alone increased Ahr mRNA, but had no effect on Ahr protein level, implicating a possible LH-dependent post-transcriptional regulation. Also, the increase in Ahr protein is specific to large antral follicles in induced follicle maturation. We show that Ahr expression in GCs of mid-phase follicular maturation is downregulated by protein kinase A (PKA) signaling and activation of Ahr promoter is regulated by chromatin remodeling.
Databáze: MEDLINE
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