[Effect of circ-SFMBT2 on the biological behavior of non-small cell lung cancer cells by targeting the miR-7-5p/ADAM10 axis].
摘要
OBJECTIVE: To explore the effect of circ-SFMBT2 on the biological behavior of non-small cell lung cancer (NSCLC) cells and its regulatory role on the miR-7-5p/ADAM10 axis. METHODS: qRT-PCR and Western blotting were used to determine the expression of circ-SFMBT2, miR-7-5p, and ADAM10 in NSCLC tissues and adjacent tissues. Pearson analysis was used to analyze the correlation between circ-SFMBT2 and miR-7-5p, and between miR-7-5p and ADAM10. In vitro cultured human bronchial epithelial-like cells (HBE) and lung cancer cell lines H1650, H460, A549, H1299. CCK-8 and EdU methods were used to assess the ability of cell proliferation. Plate experiment was used to detect the clone formation ability. Flow cytometry was used to detect the apoptosis rate. Transwell experiment was used to detect cell invasion ability. Dual luciferase reporter experiment detects the targeting relationship between circ-SFMBT2 and miR-7-5p, and between miR-7-5p and ADAM10. Transplanted tumor experiment in nude mice assessed the effect of knocking down circ-SFMBT2 on the growth of transplanted tumor. Immunohistochemical experiments were performed to detect the positive rates of ADAM10 and Ki67 proteins in transplanted tumor tissues. RESULTS: The expression levels of circ-SFMBT2 and ADAM10 were increased in NSCLC tissues and cell lines, while decreased the expression of miR-7-5p. circ-SFMBT2 was negatively correlated with miR-7-5p, while miR-7-5p was negatively correlated with ADAM10. Silencing the overexpression of circ-SFMBT2 and miR-7-5p could inhibit cell proliferation, clone formation and invasion, and also promote apoptosis. circ-SFMBT2 could target miR-7-5p, and ADAM10 was the target gene of miR-7-5p. The combined effect of silencing circ-SFMBT2 and inhibition of miR-7-5p, as well as miR-7-5p overexpression and ADAM10 overexpression could promote cell proliferation, clone formation and invasion, and also suppress cell apoptosis. Silencing circ-SFMBT2 could inhibit the growth of transplanted t