MicroRNA 452 Regulates Cell Proliferation, Cell Migration, and Angiogenesis in Colorectal Cancer by Suppressing VEGFA Expression

被引:27
作者
Mo, Ji Su [1 ,2 ]
Park, Won Cheol [2 ]
Choi, Suck-Chei [2 ]
Yun, Ki Jung [1 ,2 ]
Chae, Soo-Cheon [1 ,2 ]
机构
[1] Wonkwang Univ, Sch Med, Dept Pathol, Iksan 54538, Chonbuk, South Korea
[2] Wonkwang Univ, Digest Dis Res Inst, Iksan 54538, Chonbuk, South Korea
基金
新加坡国家研究基金会;
关键词
microRNA; MIR452; VEGFA; VEGFR2; angiogenesis; colorectal cancer; HEPATOCELLULAR-CARCINOMA; PROGRESSION; MIR-452;
D O I
10.3390/cancers11101613
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
The human microRNA 452 (MIR452) was identified as a colorectal cancer (CRC)-associated micro RNA (miRNA) by miRNA expression profiling of human CRC tissues versus normal colorectal tissues. It was significantly up-regulated in human CRC tissues. However, the functional mechanisms of MIR452 and its target genes in CRC remain unclear. We identified 27 putative MIR452 target genes, and found that the vascular endothelial growth factor A (VEGFA) was a direct target gene of MIR452. Both cellular and extracellular VEGFA levels were significantly downregulated in CRC cells upon their transfection with MIR452 or siVEGFA. VEGFA expression was frequently downregulated in human CRC tissues in comparison with that in their healthy counterparts. We showed that MIR452 regulated the expression of genes in the VEGFA-mediated signal transduction pathways vascular endothelial growth factor receptor 1 (VEGFR2)-mitogen-activated protein kinase (MAPK) and VEGFR2-SRC proto-oncogene non-receptor tyrosine kinase (SRC) in CRC cells. Immunohistological analyses of xenografted MIR452-overexpressing CRC cells in mice showed that MIR452 regulated cell proliferation and angiogenesis. Furthermore, aortic ring angiogenesis assay in rats clearly showed that the number of microvessels formed was significantly reduced by MIR452 transfection. Our findings suggest that MIR452 regulates cell proliferation, cell migration, and angiogenesis by suppressing VEGFA expression in early CRC progression; therefore, MIR452 may have therapeutic value in relation to human CRC.
引用
收藏
页数:19
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