Abstract: Specific miRNA in gastric cancer tissue or peripheral blood plasma played an important role in the pathogenesis of gastric carcinoma including occurrence and development. Some specific miRNA expression level could prompt the occurrence and stages of gastric cancer, invasion and metastasis ability and whether metastasis has occurred, the possibility of postoperative recurrence and survival time of patients as well as whether the chemical drug treatment is effective.

Key words: miRNA, gastric carcinoma, clinical application