• 1.Department of General Surgery, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, Liaoning Province, China;;
  • 2.Department of Gastrointestinal Surgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China;
WU Xiaoting, Email: wxt1@medmail.com.cn
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Objective  To explore the expressions of E-cadherin, matrix metalloproteinases-2 (MMP-2) protein,and matrix metalloproteinases-9 (MMP-9) protein in gastric cancer tissues, and to analyze the possible statistical relati-
onship between the expressions of E-cadherin, MMP-2 protein, and MMP-9 protein, and clinicopathological features of
gastric cancer.
Methods  The ABC immunohistochemical staining was adopted to examine the expressions of E-cadherin,
MMP-2 protein, and MMP-9 protein in 40 paraffin slices of gastric cancer (gastric cancer group), with the adjacent tissue as the control group (adjacent tissue group). The positive rates of 3 kinds of protein were compared between the
2 groups, in addition, the statistical relationship between the expressions of the 3 kinds of protein and clinicopathological features of gastric cancer was examined respectively by SPSS 19.0 software.
Results  The expressions of E-cadherin, MMP-2 protein, and MMP-9 protein were all found in gastric cancer tissues and adjacent tissues. In gastric cancer tissue group, the expression of E-cadherin downregulated while the expressions of MMP-2 protein and MMP-9 protein upregulated in comparison to adjacent tissue group (P<0.05). The significant association was found between the expre-ssion of E-cadherin and the gastric cancer tissues of T3+T4 stage, N1-N3 stage, and Ⅲ+Ⅳ stage, which had lower positive expression rate (P<0.05). The expression of MMP-2 protein in gastric cancer tissues of M1 stage and Ⅲ+Ⅳstage upregulated (P<0.05), and the expression of MMP-9 protein upregulated in gastric cancer tissues of T3+T4 stage,Ⅲ+Ⅳ stage, or lowlydifferentiated+undifferentiated (P<0.05). No significant relationship was found in other clinical-
pathological features and 3 kinds of protein except aforementioned significant relationship (P>0.05).
Conclusions  In the development progress of gastric cancer, the E-cadherin may get involved in the mechanism of tumor invasion and lymph node metastasis, MMP-2 protein may get involved in the mechanism of distant metastasis, and MMP-9 protein may get involved in the mechanism of differentiation and tumor invasion. The examination of those 3 kinds of markers may play an role in the judgment of tumor stage and estimation of prognosis in gastric cancer clinically.

Citation: FENG Ning,WU Xiaoting,GAO Haide,LIU Wenzhi,Chen Xi. Expression and Significance of E-cadherin, MMP-2 Protein, and MMP-9 Protein in Gastric Cancer Tissues. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2013, 20(12): 1401-1406. doi: Copy