Abstract | PURPOSE:
MicroRNA ( miRNA) is known to be involved in the pathological process of congenital heart disease (CHD), and nodal modulator1 (NOMO1) is a critical determinant of heart formation. The present study aims to discover the effect of miR-33a-5p and NOMO1 on CHD. METHODS: Quantitative real-time polymerase chain reaction (qRT-PCR) was used to detect expressions of miR-33a-5p mimic or inhibitor and overexpressed NOMO1 plasmid orNOMO1 knockdown. Human cardiomyocyte progenitor cells (hCMPCs) proliferation was measured by cell counting kit-8 (CCK-8) at 24, 48 and 72 h. Flow cytometry was applied to investigate hCMPCs cell cycle progression and apoptosis. Expressions of cell apoptotic proteins Bax, Cleaved(C) caspase-3 and Bcl-2, and expressions of cardiomyocyte differentiation markers GATA4, troponin T (cTnT) and myocyte enhancer factor2C (MEF2C) in hCMPCs were identified by qRT-PCR and western blot. Target genes and potential binding sites of NOMO1 and miR-33a-5p were predicted with Targetscan 7.2, and was confirmed through dual- luciferase reporter assay. RESULTS: Up-regulation of miR-33a-5p inhibited hCMPCs proliferation, cell cycle G0/S transition but promoted hCMPCs apoptosis, which was partially mitigated by overexpressed NOMO1. NOMO1 was the target gene of miR-33a-5p. Expressions of Bax and C caspase-3 were enhanced but expressions of Bcl-2, GATA4, cTnT and MEF2C were reduced by up-regulation of miR-33a-5p, which was partially mitigated by overexpressed NOMO1. CONCLUSION: Up-regulation of miR-33a-5p inhibited hCMPCs proliferation, cell cycle G0/S transition and differentiation into cardiomyocytes but promoted apoptosis via targeting NOMO1.
|
Authors | Wang Xing, Tiangang Li, Yixuan Wang, Yi Qiang, Chencheng Ai, Hanbo Tang |
Journal | Journal of receptor and signal transduction research
(J Recept Signal Transduct Res)
Vol. 41
Issue 5
Pg. 476-487
(Oct 2021)
ISSN: 1532-4281 [Electronic] England |
PMID | 33054489
(Publication Type: Journal Article)
|
Chemical References |
- MIRN33a microRNA, human
- Membrane Proteins
- MicroRNAs
- NOMO1 protein, human
|
Topics |
- Apoptosis
- Cell Differentiation
- Cell Proliferation
- Cells, Cultured
- Gene Expression Regulation
- Humans
- Membrane Proteins
(genetics, metabolism)
- MicroRNAs
(genetics)
- Myocytes, Cardiac
(cytology, metabolism)
- Stem Cells
(cytology, metabolism)
|