S100A8 and gastric cancer: To investigate the regulatory role of H. pylori infection on miR-223-3p expression, we infected the gastric cancer cells AGS, BGC-823 and SGC-7901 with H. pylori 26695 (CagA+) for 6 and 24 h3,23 and determined the expression of miR-223-3p with quantitative real-time PCR (qRT-PCR).