Expression of vascular cell adhesion molecule-1 facilitates angiogenesis in gastric carcinoma

Yongbin Ding; Tianson Xia; Guoyu Chen; Jianguo Xia

摘要：Objective: To investigate the relationship between the expression of VCAM-1 and oncogenesis, tumor angiogenesis and metastasis in gastric carcinoma. Methods: Using RT-PCR and immunohistochemistry technique, the expression of VCAM-1 were detected in specimens from 44 patients with gastric cancer, 8 with ulcer. Microvessel density (MVD) was also counted by endothelial cells immunostained with monoclonal antibodies CD34. In addition, Circulating sVCAM-1 concentrations were measured by an enzyme linked immunosorbent assay. Results:Of 44 gastric cancer tumor tissues, 36were detected the ex pressions of VCAM-1 mRNA. The rates of VCAM-1 mRNA in the primary gastric cancer tissues were significantly higher than those in the para-cancerous tissues and benign ulcer tissues (P ＜ 0.05). The VCAM-1 posithoseive isolates had more lymph node metastases than that of VCAM-l-negative ones (P ＜ 0.05). MVD of positive VCAM-1 expression tissues were higher than those of negative VCAM-1 (P ＜ 0.05). Circulating sVCAM-1 levels decreased significantly after operation (P ＜ 0.05). Furthermore, the levels of sVCAM-1 were positively correlated with the expressions of VCAM-1 in the tumor tissues (r = 0.64, P ＜0.05). Conclusion: Expressions of VCAM-1 mRNA was closely related to oncogenesis, tumor angiogenesis and metastasis in gastric carcinoma. The concentration of sVCAM-1 may be considered as an effective mark of tumor burden of gastric cancer.