Abstract:Objective To investigate the expressions of extracellular matrix metalloproteinase inducer molecule CD147 and epidermal growth factor receptor (EGFR) protein in gastric cancer and their relationship with the pathological behavior and prognosis. Methods Immunohistochemical staining was used to detect the expressions of CD147 and EGFR protein in 63 cases of gastric cancer and 40 cases of paracancerous normal tissues. The study was also combined with analysis of the pathological behavior and clinical follow-up survey of gastric cancer. Results The positive expression rates of CD147 and EGFR protein in gastric cancer were 77.8%（49/63） and 42.9%（27/63）, respectively, which were higher than those in paracancerous normal tissues 25.0% and 0 （χ²=27.851，P=0.000；χ²=23.233，P=0.000）. In gastric cancer, the expressions of CD147 and EGFR were closely related to the depth invasion （χ²=5.992，P=0.014；χ²13.148，P=0.000）, TNM stages （χ²=8.481，P=0.004；χ²=14.589，P=0.000）, lymph node metastasis （χ²=5.270，P=0.022；χ²=20.261，P=0.000） and prognosis of patients （χ²5.606，P=0.018；χ²=4.982，P=0.026）. The expression of CD147 was also significantly correlated with Ki-67 expression （χ²=10.481，P=0.001）. CD147 expression was positively correlated with EGFR expression（r=0.309，P=0.014）. Conclusion The expressions of CD147 and EGFR are closely related to carcinogenesis, metastasis and survival time of gastric cancer. Detecting the expressions of CD147 and EGFR may be prognostic indicators of gastric cancer.

Key words:Stomach neoplasms,Prognosis,Antigens, CD147,Epidermal growth factor