Over-expression of miR-144 inhibits invasion of liver cancer SMMC-7721 cells by suppressing TLR/MyD88 pathway.
10.12122/j.issn.1673-4254.2020.05.25
- Author:
Qingsong YI
1
;
Jiujiu LIU
1
;
Kurban ALEXIA
1
;
Jing LI
1
;
Hongwu LUO
1
;
Jichun SUN
1
Author Information
1. Department of Hepatobiliary Surgery, Xiangya Third Hospital of Central South University, Changsha 410006, China.
- Publication Type:Journal Article
- Keywords:
SMMC-7721 cells;
Toll-like receptor/myeloid differentiation factor 88;
invasion;
miR-144;
survival
- MeSH:
Cell Line, Tumor;
Humans;
Liver Neoplasms;
Matrix Metalloproteinase 2;
MicroRNAs;
Myeloid Differentiation Factor 88;
NF-kappa B;
Signal Transduction;
Toll-Like Receptors
- From:
Journal of Southern Medical University
2020;40(5):765-771
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To investigate the effects of over-expression of miR-144 on invasion of SMMC-7721 cells and Toll-like receptor (TLR)/myeloid differentiation factor 88 (MyD88) pathway in hepatocellular carcinoma cells.
METHODS:The expressions of miR-144 was examined in normal human hepatocyte line HL-7702 and hepatocarcinoma cell line SMMC-7721 using realtime quantitative PCR (qRT-PCR). SMMC-7721 cells were divided into blank group, miR-144 NC group and miR-144 mimics group, and the expressions of miR-144 in each group were detected with qRT-PCR. Cell count kit-8 (CCK8) was used to assess the survival of SMMC-7721 cells, and the cell invasion was evaluated using Transwell assay. The expressions of matrix metalloproteinase-2 (MMP-2), matrix metalloproteinase-9 (MMP-9) and TLR/MyD88 pathway-related proteins in the cells were detected with Western blotting; the effect of 40 μ mol/L MyD88 inhibitor on TLR/MyD88 pathway-related proteins was examined in SMMC-7721 cells.
RESULTS:Compared with normal human hepatocytes, SMMC-7721 cells expressed a significantly lower level of miR-144 ( < 0.05). CCK-8 assay showed that test showed that miR-144 over-expression significantly decreased the cell survival rate ( < 0.05), lowered the number of invasive cells, and decreased the expression of MMP-2 and MMP-9 in SMMC-7721 cells ( < 0.05). The expressions of Toll-like receptor 4 (TLR4), MyD88, phosphorylated nuclear factor-kappa B (pNF-κB) and NF-κB protein decreased significantly in miR-144 mimics group and TJ-M2010-2 group ( < 0.05) and were comparable between the two groups ( > 0.05).
CONCLUSIONS:Overexpression of miR-144 decreases SMMC-7721 cell survival and invasion by inhibiting TLR/MyD88 pathway.
