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Potential regulatory network in the PSG10P/miR-19a-3p/IL1RAP pathway is possibly involved in preeclampsia pathogenesis.
Journal of Cellular and Molecular Medicine 2019 Februrary
Preeclampsia (PE), a pregnancy-specific disorder, is a leading cause of perinatal maternal-fetal mortality and morbidity. Impaired cell migration and invasion of trophoblastic cells and an imbalanced systemic maternal inflammatory response have been proposed as potential mechanisms of PE pathogenesis. Comparative analysis between PE placentas and normal placentas profiled differentially expressed miRNAs, lncRNAs, and mRNAs, including miR-19a-3p (miRNA), PSG10P (lncRNA), and IL1RAP (mRNA). This study was conducted to investigate their potential roles in PE pathogenesis. The expression of miR-19a-3p, PSG10P, and IL1RAP was examined in PE and normal placentas using RT-qPCR. An in vitro experiment was performed in human trophoblast HET8/SVneo and TEV-1 cells cultured in normoxic and hypoxic conditions. MiR-19a-3p targets were identified using Targetscan, miRanda, and PicTar analysis as well as luciferase reporter assays. The mouse model of PE was conducted using sFlt-1 for in vivo tests. Lower levels of miR-19a-3p, but higher levels of PSG10P and IL1RAP were observed in PE placentas and the trophoblast cells in hypoxia. Luciferase reporter assays confirmed that PSG10P and IL1RAP were both direct targets of miR-19a-3p. Exposure to hypoxia inhibited cell viability, migration, and invasion of HET8/SVneo and TEV-1 cells. Knocking out PSG10P and IL1RAP or overexpressing miR-19a-3p rescued the inhibition caused by hypoxia. In vivo experiments showed that IL1RAP promoted the expression of caspase-3, a key apoptosis enzyme, but inhibited MMP9, which is responsible for degrading the extracellular matrix, suggesting a significant role of IL1RAP in cell proliferation, migration, and invasion. miR-19a-3p, PSG10P, and IL1RAP were all found to be involved in PE pathogenesis. With a common targeting region in their sequences, a regulatory network in the PSG10P/miR-19a-3p/IL1RAP pathway may contribute to PE pathogenesis during pregnancy.
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