Migration and invasion assays revealed that MRTF-A inhibition significantly suppressed the migration and invasion of gastric cancer cells, co-treatment with miR-155 mimics significantly reversed the tumor-suppressive effects on SGC-7901 cells (Fig. 6c, d), suggesting that miR-155 activity is required for MRTF-A-induced cell migration and invasion. The gene discussed is MRTFA; the disease is neoplasm.