Effects of miR-7 on Hcy-induced rat cerebral arterial vascular smooth muscle cell proliferation, migration and inflammatory factor expression by targeting MMP-14 to regulate TLR4/NF-κB signaling pathway

2020/10/31 by Hongdan Ma, Lei Wang, Wen Lv +1

paper · doi:10.14715/cmb/2020.66.7.3

Abstract

The current research aimed to investigate the effect of miR-7 targeting matrix metalloproteinase 14 (MMP-14) on homocysteine (Hcy)-induced rat cerebral artery vascular smooth muscle cells (VSMCs) proliferation, migration and inflammatory factor expression and its possible mechanism. The expression of miR-7 and MMP-14 in Hcy-induced VSMCs were detected by real-time fluorescent quantitative PCR (RT-qPCR) and Western blot. Methyl Thiazolyl Tetrazolium (MTT) method, Transwell assays and enzyme-linked immunosorbent assay (ELISA) were performed to detect the effect of miR-7 and MMP-14 expression on the proliferation and migration, as well as interleukin 6 (IL-6) and tumor necrosis factor ɑ (TNF-ɑ) expression of Hcy-induced VSMCs. The interaction between miR-7 and MMP-14 was detected by dual-luciferase reporter gene assay. Western blot was applied to analyse the effects of miR-7 and MMP-14 expression on the Toll-like receptor (TLR4)/nuclear transcription factor-KB (NF-κB) signaling pathway. The results showed that after induced by Hcy, the expression of miR-7 in VSMCs was significantly reduced, the expression of MMP-14 was significantly increased, and the cell viability, the number of migrating cells, IL-6 and TNF-ɑ expression were significantly increased (P

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