中文English
ISSN 1001-5256 (Print)
ISSN 2097-3497 (Online)
CN 22-1108/R
Volume 38 Issue 3
Mar.  2022
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Article Contents

Effect of long non-coding RNA LNC 01309 on proliferation and migration abilities of human hepatoma cells and its mechanism of action

DOI: 10.3969/j.issn.1001-5256.2022.03.014
Research funding:

The Key Logistics Science Research Project of PLA (BHJ14C008)

More Information
  • Corresponding author: WEN Juyi, wenjuyi@126.com(ORCID:0000-0002-7469-7811)
  • Received Date: 2021-07-21
  • Accepted Date: 2021-09-29
  • Published Date: 2022-03-20
  •   Objective  To investigate the effect of long non-coding RNA (lncRNA) LNC01309 on the proliferation and migration abilities of human hepatocellular carcinoma (HCC) cells and its mechanism of action.  Methods  HCC samples and corresponding adjacent tissue samples were collected from 12 patients with HCC who underwent surgical treatment in The Sixth Medical Center of PLA General Hospital from February 2018 to June 2019, and quantitative real-time PCR was used to measure the relative expression level of LNC01309. Quantitative real-time PCR was also used to measure the expression level of LNC01309 in human hepatoma cell lines (HepG2, SNU-398, and Hep3B) and the human immortalized normal liver cell line THLE-2. After LNC01309 was overexpressed in HepG2 cells, the cells were divided into plasmid control group (pEXP-control) and overexpression group (pEXP-LNC01309). CCK-8 assay was used to observe the change in cell proliferation, and wound healing assay and Transwell assay were used to observe migration ability. RNA co-immunoprecipitation was used to detect the interaction between LNC01309 with RBM38, with cells divided into IgG group and RBM38 antibody group, and cycloheximide chase assay was used to analyze the effect of LNC01309 on the stability of RBM38 protein. RBM38 was overexpressed in HepG2 cells to conduct the recovery experiment, and CCK-8 assay, wound healing assay, and Transwell assay were used to observe the changes in cell proliferation and migration abilities. The t-test was used for comparison of continuous data between two groups.  Results  The mean expression level of LNC01309 in HCC tissue was significantly higher than that in adjacent tissue (4.225±2.285 vs 1.541±0.530, t=3.618, P=0.004), and the relative expression level of LNC01309 in hepatoma cells (HepG2, SNU-398, and Hep3B) was also significantly higher than that in normal hepatocytes (THLE-2) (t=4.231、6.489、14.480, all P < 0.05). Compared with the control group, HepG2 cells with the overexpression of LNC01309 had significant increases in growth rate (OD450 value at 96 hours: 1.885±0.107 vs 2.527±0.234, t=4.330, P=0.012) and migration ability (11.65%±2.40% vs 35.66%±4.90%, t=9.837, P < 0.001; 100.00%±3.11% vs 161.00%±35.93%, t=4.399, P=0.005); however, the upregulated proliferation and migration abilities of hepatoma cells induced by LNC01309 overexpression were partially inhibited by RBM38 (OD450 value at 96 hours: 2.500±0.227 vs 1.913±0.282, t=2.812, P=0.048; 168.00%±9.43% vs 117.20%±18.03%, t=6.622, P < 0.001). Compared with the IgG control group, RBM38 antibody significantly enriched the precipitation of LNC01309 (t=3.846, P=0.031). The results of cycloheximide chase assay showed that the LNC01309 overexpression group had a significant reduction in the stability of RBM38 protein (t=8.038, P=0.001).  Conclusion  The newly identified LNC01309 reduces the stability of RBM38 protein through interaction with RBM38 and promotes the proliferation and migration of HCC cells.

     

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