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MiR-92b inhibits proliferation and invasion of lung cancer by targeting EZH2.

Eur Rev Med Pharmacol Sci. 2020 Mar;24(6):3166-3173. doi:10.26355/eurrev_202003_20683
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摘要


OBJECTIVE:To verify that miR-92b inhibits proliferation and invasion of lung cancer by targeting EZH2. MATERIALS AND METHODS:The expression levels of miR-92b and EZH2 in human bronchial epithelial cell line BEAS-2B and human lung cancer cell line (A549, NCI-H23, NCI-H358, NCI-H1975, PC-9) were detected, and miR-92b mimic, sh-EZH2 expression vector, and plasmid blank vector (blank group) were constructed. Blank group, miR-92b mimic, miR-92b mimic+sh-EZH2 group (combined group) were set up, MTT and transwell were used to detect the proliferation and invasion ability of A549 and NCI-H23 cells, and fluorescein report verified the regulatory relationship of miR-92b to EZH2. RESULTS:The expression level of miR-92b in A549, NCI-H23, NCI-H358, NCI-H1975, and PC-9 cells was lower than that in BEAS-2B cells (p<0.05). The expression level of EZH2 was higher than that of BEAS-2B cells (p<0.05). A549 and NCI-H23 cells were selected for transfection. After that, the expression level of miR-92 in miR-92b mimic, combined group A549 and NCI-H23 cells was higher than that in blank group (p<0.05), and miR-92b mimic had no difference with joint group (p>0.05). The expression level of EZH2 in cells of miR-92b mimic, blank group A549, and NCI-H23 was lower than that of combined group (p<0.05), and miR-92b mimic was lower than that of blank group (p<0.05). After the overexpression of miR-92b, pmirGLO-EZH2-3'UT Wt luciferase activity decreased significantly (p<0.05) but had no effect on pmirGLO-EZH2-3'UTR Mut Luciferase activity (p>0.05). Cell proliferation ability and invasion ability of A549 cells and NCI-H23 cells in miR-92b mimic group were lower than those in blank group (p<0.05), while those in combined group were higher than those in miR-92b mimic group (p<0.05). CONCLUSIONS:MiR-92b inhibits proliferation and invasion of lung cancer cells through targeted inhibition of EZH2, which is a potential target for future treatment of lung cancer.

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