To further detect whether RUNX3 downregulated vimentin expression through miR-30a, we added the miR-30a inhibitor into gastric cancer cells transfected with the RUNX3 expression vector and found that the miR-30a inhibitor abolished the RUNX3-mediated downregulation of vimentin and the inhibition of gastric cancer cell invasion. The gene discussed is VIM; the disease is gastric cancer.