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- W4247880917 abstract "Abstract Background Gastric cancer (GC) is the fourth common and the second lethal malignancy. Further understanding of the molecular mechanisms of underlying gastric carcinogenesis will enhance the diagnosis and treatment of GC. Methods The expression of lncRNA DLEU2 and ETS2 was analysed using GEPIA online analyze, qRT-PCR and immunohistochemistry. siRNAs targeting to lncRNA DLEU2 were designed to reduce the expression of lncRNA DLEU2. miR-30a-5p mimics were purchased to up-regulate the level of miR-30a-5p. The pcDNA3.1-ETS2 vector was synthesized to up-regulate the expression of ETS2. The biological function 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 LncRNA DLEU2 was significantly up-regulated in GC tissues. The expression of lncRNA DLEU2 was significantly associated with pathological grading and TNM stage of GC patients. Furthermore, knockdown of lncRNA DLEU2 inhibited the proliferation, migration and invasion of AGS and MKN-45 cells, and induced cell apoptosis. We also found that miR-30a-5p could directly bind to the 3’ UTR region of ETS2. Moreover, lncRNA DLEU2 bound to miR-30a-5p through the same binding site, which facilitated the expression of ETS2. Knockdown of lncRNA DLEU2 reduced the protein level of intracellular ETS2 and inhibited the AKT phosphorylation. 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 lncRNA DLEU2 down-regulation and miR-30a-5p up-regulation in AGS and MKN-45 cells. These results showed that lncRNA DLEU2 may regulate GC cells process through miR-30a-5p/ETS2 axis. In addition, hypoxic microenvironment resulted in the accumulation and nucleation of HIF-1α in gastric cancer cells, and up-regulated the expression of DLEU2. Conclusions LncRNA DLEU2 was a potential molecular target for GC treatment." @default.
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- W4247880917 date "2020-07-06" @default.
- W4247880917 modified "2023-09-30" @default.
- W4247880917 title "lncRNA DLEU2 promotes gastric cancer progression through ETS2 via targeting miR-30a-5p" @default.
- W4247880917 doi "https://doi.org/10.21203/rs.3.rs-39621/v1" @default.
- W4247880917 hasPublicationYear "2020" @default.
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