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2016 ; 7
(41
): 66922-66934
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MicroRNA-126 inhibits tumor proliferation and angiogenesis of hepatocellular
carcinoma by down-regulating EGFL7 expression
#MMPMID27611944
Hu MH
; Ma CY
; Wang XM
; Ye CD
; Zhang GX
; Chen L
; Wang JG
Oncotarget
2016[Oct]; 7
(41
): 66922-66934
PMID27611944
show ga
This study aims to explore the effects of microRNA-126 (miR-126) on tumor
proliferation and angiogenesis of hepatocellular carcinoma (HCC) by targeting
EGFL7. HCC tissues and adjacent normal tissues were obtained from 71 HCC
patients. Immunohistochemistry (IHC) was conducted to detect expressions of EGFL7
and VEGF and the micro-vessel density (MVD). HCC cell lines were collected and
assigned into the blank, miR-126 mimics, miR-126 inhibitors, miR-126 mimics
negative control (NC), miR-126 inhibitors NC, si-EGFL7, and miR-126 inhibitors +
si-EGFL7 groups. Expressions of miR-126 and EGFL7 mRNA were detected by qRT-PCR
assay. The protein expressions of EGFL7 and VEGF were measured by Western
blotting. MTT assay was used to measure the proliferation of HCC cells. Tumor
xenograft model in nude mice was utilized to evaluate the influence of miR-126 on
tumor growth. HCC tissues had higher miR-126 expression and lower EGFL7 mRNA
expression than adjacent normal tissues. Compared with the blank, miR-126 mimic
NC, miR-126 inhibitor NC and miR-126 inhibitors + si-EGFL7 groups, the protein
expressions of EGFL7 and VEGF and cell proliferation were reduced in the miR-126
mimics and si-EGFL7 groups, while the opposite trend was found in the miR-126
inhibitors group. Compared with the blank and miR-126 inhibitors + siRNA-EGFL7
groups, tumor size, tumor weight, and MVD of transplanted tumors in nude mice
were significantly reduced in the miR-126 mimics and siRNA-EGFL7 groups, while
the opposite trend was found in the miR-126 inhibitors group. In conclusion,
miR-126 could inhibit tumor proliferation and angiogenesis of HCC by
down-regulating EGFL7 expression.