Abstract
IntroductionGastric cancer occurred in China and even the whole East Asia with high incidence. The objective of this study was to investigate the role of IL-17 in gastric cancer cells mediated by LCN2 binding to SLPI.MethodsThe expression of LCN2 and SPLI in gastric cancer cells and transfection effects were confirmed by RT-qPCR analysis. The proliferation, clone formation ability, invasion, migration, apoptosis, and cell cycle of gastric cancer cells were in turn detected by CCK-8 assay, clone formation assay, transwell assay, wound healing assay, and flow cytometry analysis. The combination between LCN2 and SLPI was determined by co-immunoprecipitation assay. The expression of Caspase-3, Bcl-2, cyclinB1, cyclinD1, MMP9, and SLPI in gastric cancer cells was detected by Western blot analysis.ResultsLCN2 and SPLI exhibited the highest levels in AGS cells, and thus AGS cells were selected for the next experiments. Down-regulation of LCN2 suppressed the proliferation and clone formation ability of AGS cells treated with IL-17. IL-17 promoted the invasion and migration of AGS cells, which was partially reversed by the down-regulation of LCN2. Down-regulation of LCN2 mediated by IL-17 promoted apoptosis and suppressed the cell cycle of AGS cells.DiscussionDown-regulation of LCN2 mediated by IL-17 suppressed the proliferation and suppressed the migration and invasion and cell cycle of gastric cancer cells by targeting SLPI.
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