Up-Regulation of MiR-1915 Inhibits Proliferation, Invasion, and Migration of Helicobacter pylori-Infected Gastric Cancer Cells via Targeting RAGE
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Purpose: Helicobacter pylori (HP)-infected gastric cancer (GC) is known to be a fatal malignant tumor, but the molecular mechanismsunderlying its proliferation, invasion, and migration remain far from being completely understood. Our aim in this studywas to explore miR-1915 expression and its molecular mechanisms in regulating proliferation, invasion, and migration of HP-infectedGC cells. Materials and Methods: Quantitative real-time PCR and western blot analysis were performed to determine miR-1915 and receptorfor advanced glycation end product (RAGE) expression in HP-infected GC tissues and gastritis tissues, as well as humangastric mucosal cell line GES-1 and human GC cell lines SGC-7901 and MKN45. CCK8 assay and transwell assay were performedto detect the proliferation, invasion, and migration capabilities. MiR-1915 mimics and miR-1915 inhibitor were transfected intoGC cells to determine the target relationship between miR-1915 and RAGE. Results: MiR-1915 was under-expressed, while RAGE was over-expressed in HP-infected GC tissues and GC cells. Over-expressedmiR-1915 could attenuate cellular proliferation, invasion, and migration capacities. RAGE was confirmed to be the target gene ofmiR-1915 by bioinformatics analysis and luciferase reporter assay. Moreover, HP-infected GC cellular proliferation, invasion, andmigration were inhibited after treatment with pcDNA-RAGE. Conclusion: MiR-1915 exerted tumor-suppressive effects on cellular proliferation, invasion, and migration of HP-infected GCcells via targeting RAGE, which provided an innovative target candidate for treatment of HP-infected GC.
Abstract
Purpose: Helicobacter pylori (HP)-infected gastric cancer (GC) is known to be a fatal malignant tumor, but the molecular mechanismsunderlying its proliferation, invasion, and migration remain far from being completely understood. Our aim in this studywas to explore miR-1915 expression and its molecular mechanisms in regulating proliferation, invasion, and migration of HP-infectedGC cells. Materials and Methods: Quantitative real-time PCR and western blot analysis were performed to determine miR-1915 and receptorfor advanced glycation end product (RAGE) expression in HP-infected GC tissues and gastritis tissues, as well as humangastric mucosal cell line GES-1 and human GC cell lines SGC-7901 and MKN45. CCK8 assay and transwell assay were performedto detect the proliferation, invasion, and migration capabilities. MiR-1915 mimics and miR-1915 inhibitor were transfected intoGC cells to determine the target relationship between miR-1915 and RAGE. Results: MiR-1915 was under-expressed, while RAGE was over-expressed in HP-infected GC tissues and GC cells. Over-expressedmiR-1915 could attenuate cellular proliferation, invasion, and migration capacities. RAGE was confirmed to be the target gene ofmiR-1915 by bioinformatics analysis and luciferase reporter assay. Moreover, HP-infected GC cellular proliferation, invasion, andmigration were inhibited after treatment with pcDNA-RAGE. Conclusion: MiR-1915 exerted tumor-suppressive effects on cellular proliferation, invasion, and migration of HP-infected GCcells via targeting RAGE, which provided an innovative target candidate for treatment of HP-infected GC.
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