Abstract
Fetal growth restriction (FGR) ranks second among causes of perinatal death. Circular RNA hsa_circ_0074371 (hsa_circ_0074371) is reported to be downregulated in FGR placentae. However, the role and regulatory mechanism of hsa_circ_0074371 in FGR pathogenesis are indistinct. Expression of hsa_circ_0074371, microRNA (miR)-582-3p, and low-density lipoprotein receptor-related protein 6 (LRP6) mRNA in FGR placentae and trophoblast cells (HTR-8/SVneo) was detected by quantitative real-time polymerase chain reaction (qRT-PCR). The relationship between hsa_circ_0074371 or LRP6 and miR-582-3p was verified by dual-luciferase reporter and/or RNA immunoprecipitation (RIP), RNA pull-down assays. The proliferation, cell cycle progression, apoptosis, migration, and invasion of HTR-8/SVneo cells were evaluated by Cell Counting Kit-8 (CCK-8), flow cytometry, wound healing, or transwell assays. Caspase3 activity was analyzed with a commercial kit. The protein levels of c-myc, cyclinD1, matrix metalloproteinase (MMP) 2, MMP9, and LRP6 were examined by western blotting. We observed that hsa_circ_0074371 and LRP6 were downregulated while miR-582-3p was upregulated in FGR placentae and HTR-8/SVneo cells. Hsa_circ_0074371 modulated LRP6 expression via sponging miR-582-3p. Hsa_circ_0074371 knockdown induced cell cycle arrest, apoptosis, and inhibited cell proliferation, migration, and invasion in HTR-8/SVneo cells. MiR-582-3p inhibitor reversed hsa_circ_0074371 silencing me on proliferation, migration, and invasion of HTR-8/SVneo cells. LRP6 overexpression overturned the inhibitory effect of miR-582-3p mimic on proliferation, migration, and invasion of HTR-8/SVneo cells. In conclusion, hsa_circ_0074371 downregulation inhibited proliferation, migration, and invasion of trophoblast cells via sponging miR-582-3p and decreasing LRP6 expression, providing a new mechanism related to FGR pathogenesis.
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The analyzed datasets generated during the study are available from the corresponding author on reasonable request.
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GH designed and supervised the study. PY conducted the experiments and drafted the manuscript. HN collected and analyzed the data, edited the manuscript. All authors read and approved the final manuscript.
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The research was authorized by the Ethics Committee of People’s Hospital of Rizhao and was carried out according to the guidelines of Declaration of Helsinki. Each participant signed a written informed consent before conducting this study.
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10528_2021_10095_MOESM1_ESM.tif
Supplementary file1 (TIF 136 kb) RNA pull-down assay was performed to analyze biotin-labeled hsa_circ_0074371 probe whether could pull down 3 candidate miRs in HTR-8/SVneo cells.
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Yao, P., Hu, G. & Niu, H. Hsa_circ_0074371 Regulates Proliferation, Apoptosis, Migration, and Invasion via the miR-582-3p/LRP6 Axis in Trophoblast Cells. Biochem Genet 60, 267–285 (2022). https://doi.org/10.1007/s10528-021-10095-2
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DOI: https://doi.org/10.1007/s10528-021-10095-2