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G protein‑coupled estrogen receptor/miR‑148a/human leukocyte antigen‑G signaling pathway mediates cell apoptosis of ovarian endometriosis.
Molecular Medicine Reports 2018 July
The focus of the current study was a G protein‑coupled estrogen receptor (GPER)/microRNA (miR)‑148a/human leukocyte antigen‑G (HLA‑G) signaling pathway in ovarian endometriosis. Reverse transcription‑quantitative polymerase chain reaction was performed to analyze the changes in miR‑148a expression. A MTT assay, flow cytometry and caspase‑3/9 activity assays were performed to analyze cell proliferation, apoptosis and caspase‑3/9 activity levels, respectively. Protein expression was measured using western blot analysis. In tissue samples from healthy controls, and patients with endometriosis and endometriosis‑associated ovarian cancer, the expression of miR‑148a was lower in in endometriosis and EAOC samples compared with healthy controls. Overexpression of miR‑148a using miR mimics significantly decreased proliferation, promoted apoptosis, increased the Bcl‑2 associated X apoptosis regulator (Bax)/Bcl‑2 apoptosis regulator (Bcl‑2) ratio and caspase3/9 activity, and suppressed HLA‑G protein expression in Hs 832(C).T cells. miR‑148a downregulation using miR inhibitor significantly increased cell viability, inhibited apoptosis, and reduced the Bax/Bcl‑2 ratio and caspase3/9 activity, and induced HLA‑G protein expression in Hs 832(C).T cells. The GPER inhibitor, G15, suppressed GPER protein expression, upregulated miR‑148a expression, decreased cell proliferation, promoted apoptosis, increased the Bax/Bcl‑2 ratio and caspase3 activity, and suppressed HLA‑G protein expression in Hs 832(C).T cells. The findings indicate that GPER/miR‑148a/HLA‑G signaling pathway may mediates the development of ovarian endometriosis and may become a potential therapeutic target for the treatment of endometriosis.
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