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Published in: Cancer Cell International 1/2021

01-12-2021 | Gastric Cancer | Primary research

lncRNA DLEU2 promotes gastric cancer progression through ETS2 via targeting miR-30a-5p

Authors: Shuyi Han, Yan Qi, Yihui Xu, Min Wang, Jun Wang, Jing Wang, Mingjie Yuan, Yanfei Jia, Xiaoli Ma, Yunshan Wang, Xiangdong Liu

Published in: Cancer Cell International | Issue 1/2021

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Abstract

Background

Gastric cancer (GC) remains an important cancer worldwide. Further understanding of the molecular mechanisms of gastric carcinogenesis will enhance the diagnosis and treatment of GC.

Methods

The expression of DLEU2 and ETS2 was analyzed in several GC cell lines using GEPIA online analyze, qRT-PCR and immunohistochemistry. The biological behavior of GC cells was detected by CCK8, clone formation, transwell, wound healing, western blot, and flow cytometry assay. More in-depth mechanisms were studied.

Results

DLEU2 was significantly up-regulated in GC tissues and cell lines. The expression of DLEU2 was significantly associated with pathological grading and TNM stage of GC patients. Furthermore, knockdown of DLEU2 inhibited the proliferation, migration, and invasion of AGS and MKN-45 cells, while overexpression of DLEU2 promoted the proliferation, migration, and invasion of HGC-27 cells. MiR-30a-5p could directly bind to the 3’ UTR region of ETS2. Moreover, DLEU2 bound to miR-30a-5p through the same binding site, which facilitated the expression of ETS2. Knockdown of DLEU2 reduced the protein level of intracellular ETS2 and inhibited AKT phosphorylation, while overexpression of DLEU2 induced the expression of ETS2 and the phosphorylation of AKT. ETS2 was highly expressed in GC tissues. The expression of ETS2 was significantly associated with age, pathological grading, and TNM stage. ETS2 overexpression promoted cell proliferation and migration of AGS and MKN-45 cells. Furthermore, ETS2 overexpression rescued cell proliferation and migration inhibition induced by DLEU2 down-regulation and miR-30a-5p up-regulation in AGS and MKN-45 cells.

Conclusions

DLEU2 is a potential molecular target for GC treatment.
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Metadata
Title
lncRNA DLEU2 promotes gastric cancer progression through ETS2 via targeting miR-30a-5p
Authors
Shuyi Han
Yan Qi
Yihui Xu
Min Wang
Jun Wang
Jing Wang
Mingjie Yuan
Yanfei Jia
Xiaoli Ma
Yunshan Wang
Xiangdong Liu
Publication date
01-12-2021
Publisher
BioMed Central
Published in
Cancer Cell International / Issue 1/2021
Electronic ISSN: 1475-2867
DOI
https://doi.org/10.1186/s12935-021-02074-9

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