miR-194-3p Represses the Progesterone Receptor and Decidualization in Eutopic Endometrium From Women With Endometriosis

Endocrinology
Tianjiao PeiWei Huang

Abstract

Progesterone resistance in the eutopic endometrium (EuE) is suggested to be a critical factor for decreased endometrial receptivity and implantation failure in reproductive-aged women with endometriosis. Altered expression of miRNAs has been reported to play an important role in the pathophysiology of endometriosis-associated infertility. However, the underlying mechanisms of aberrant progesterone receptor (PR) and deficient decidualization regulated by miRNAs in endometriosis have not been thoroughly elucidated. The goal of this study was to explore the regulation and roles of miR-194-3p in aberrant PR expression and impaired decidualization in endometrial stromal cells (ESCs) from the EuE of women with mild or minimal endometriosis. Using a series of studies, we observed decreased PR mRNA expression and an increasing PR-A/PR-B mRNA ratio trend in the midsecretory phase of the EuE of women with minimal or mild endometriosis (n = 19) compared with controls (n = 14); the increased expression of miR-194-3p in the endometriosis group was consistent with previous microarray analysis. We also found that PR protein levels were inhibited by the transfection of ESCs with an miR-194-3p mimic and upregulated by miR-194-3p inhibition. As ...Continue Reading

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