Abstract:Objective To explore the expressions of Syntaxin 6 (STX6) and Syntaxin 8 (STX8) in gastric cancer and their clinical significance, and to evaluate their value in prediction of prognosis. Methods STX6 and STX8 expressions and clinicopathological information of 882 gastric cancer patients were collected from Kaplan- Meier plotter (KM plotter) online database, and the correlations of STX6 and STX8 expressions with the prognosis of gastric cancer were explored using KM plotter. Results The high expression of STX6 mRNA was associated with longer overall survival (OS) of the patients with gastric cancer (P < 0.05). The high expression of STX6 mRNA was closely related to mixed type of Lauren, lymph node metastasis, no distant metastasis and HER2 status in the gastric cancer patients (P < 0.05). The high expression of STX8 mRNA was associated with longer OS of the patients with gastric cancer (P < 0.05). The high expression of STX8 mRNA was closely related to clinical stage II and stage IV, instestinal type and diffuse type of Lauren, no distant metastasis and negative HER2 in the gastric cancer patients (P < 0.05). Conclusions The expressions of STX6 and STX8 are closely related to the prognosis of gastric cancer patients, and the patients with high expression of STX6 and STX8 have better prognosis. STX6 and STX8 may be used as potential prognostic indicators for gastric cancer.