Oncol2012: 胃癌组织中CD44v6和Livin的表达及临床意义

Expressions of CD44v6 and Livin in gastric cancer tissue and their clinical significance

Background CD44v6, a cellular adhesion molecule, plays an important role in the invasion and metastasis of tumor, and Livin, has anti-apoptotic effects. The present study aimed to explore the expression and clinical significance of CD44v6 and Livin in gastric cancer tissues and control tissues. Methods Streptavidin-peroxidase (SP) linked immunohistochemical method was used to determine expression of CD44v6 and Livin in gastric cancer tissue and normal gastric tissues adjacent to the cancer tissues from the 59 patients with histopathologically confirmed gastric cancer, and in gastric tissue specimens of 15 patients with gastric polyps and 15 patients with chronic non-atrophic gastritis. The Chi-square test was used for comparison of the relevant factors, Spearman's rank correlation test was applied for relationship among positive expression of the proteins. Results The expresion of CD44v6 was positive in 64.41% of the gastric cancer patients; 5.08%, 0%% and 13.33% in the specimens of normal tissues adjacent to the cancer tissues, in gastric tissue specimens of patients with gastric polyps and chronic non-atrophic gastritis. The expression of Livin was positive in 52.54% of specimens of the gastric cancer tissues, 6.78%, 0% and 6.67% in the normal gastric tissue adjacent to cancer tissue, specimens of patients with gastric polyps and chronic non-atrophic gastritis. The expression of CD44v6 was significantly correlated with the depth of invasion, the degree of differentiation, and lymphnode metastasis of gastric cancer (P<0.05). The positive expression rate of Livin protein also significantly correlated with degree of differentiation of gastric cancer cells and metastasis to lymphnodes (P<0.05), but did not correlate with the depth of invasion and pathological types (P>0.05). The expression of CD44v6 and Livin in the gastric cancer tissue was positively correlated (rs=0.286, P=0.028). Conclusions The increased expression of CD44v6 and Livin in the gastric cancer tissue may be closely related with development and progression of gastric cancer. After vigorous basic and clinical studies, these two proteins may become new biological markers of gastric cancer, and may become novel therapeutic targets of gastric cancer.