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Published in: Reproductive Biology and Endocrinology 1/2015

Open Access 01-12-2015 | Research

Decidualisation of human endometrial stromal cells is associated with increased expression and secretion of prorenin

Authors: Eugenie R. Lumbers, Yu Wang, Sarah J. Delforce, Celine Corbisier de Meaultsart, Philip C. Logan, Murray D. Mitchell, Kirsty G. Pringle

Published in: Reproductive Biology and Endocrinology | Issue 1/2015

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Abstract

Background

In pregnancy, the decidualised endometrium expresses high levels of prorenin and other genes of the renin-angiotensin system (RAS) pathway. In this study we aimed to determined if the RAS was present in endometrial stromal cells and if decidualisation upregulated the expression of prorenin, the prorenin receptor ((P)RR) and associated RAS pathways. Immortalised human endometrial stromal cells (HESCs) can be stimulated to decidualise by combined treatment with medroxyprogesterone acetate (MPA), 17β-estradiol (E2) and cAMP (MPA-mix) or with 5-aza-2’-deoxycytidine (AZA), a global demethylating agent.

Methods

HESCs were incubated for 10 days with one of the following treatments: vehicle, MPA-mix, a combination of medroxyprogesterone acetate (MPA) and estradiol-17β alone, or AZA. Messenger RNA abundance and protein levels of prorenin (REN), the (P)RR (ATP6AP2), angiotensinogen (AGT), angiotensin converting enzyme (ACE), angiotensin II type 1 receptor (AGTR1), vascular endothelial growth factor (VEGF), and plasminogen activator inhibitor-1 (PAI-1) were measured by real-time PCR and ELISA’s, respectively. Promyelocytic zinc finger (PLZF) and phospho-inositol-3 kinase (PIK3R1) mRNA abundances were also measured.

Results

HESCs expressed the prorenin receptor (ATP6AP2), REN, AGT, ACE and low levels of AGTR1. MPA-mix and AZA stimulated expression of REN. Prorenin protein secretion was increased in MPA-mix treated HESCs. E2 + MPA had no effect on any RAS genes. MPA-mix treatment was associated with increased VEGF (VEGFA) and PAI-1 (SERPINE1) mRNA and VEGF protein.

Conclusions

An endometrial prorenin receptor/renin angiotensin system is activated by decidualisation. Since (P)RR is abundant, the increase in prorenin secretion could have stimulated VEGF A and SERPINE1 expression via Ang II, as both ACE and AGTR1 are present, or by Ang II independent pathways. Activation of the RAS in human endometrium with decidualisation, through stimulation of VEGF expression and secretion, could be critical in establishing an adequate blood supply to the developing maternal placental vascular bed.
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Metadata
Title
Decidualisation of human endometrial stromal cells is associated with increased expression and secretion of prorenin
Authors
Eugenie R. Lumbers
Yu Wang
Sarah J. Delforce
Celine Corbisier de Meaultsart
Philip C. Logan
Murray D. Mitchell
Kirsty G. Pringle
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Reproductive Biology and Endocrinology / Issue 1/2015
Electronic ISSN: 1477-7827
DOI
https://doi.org/10.1186/s12958-015-0127-8

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