[Relationship between the express product of src gene (pp60c-src) and the initiation of gastric carcinoma]

The tissues of the fetal gastric epithelia, adult normal gastric epithelia, gastric epithelial lesions, gastric carcinoma and the tissues adjacent to carcinoma were studied immunohistochemically by using the specific monoclonal antibody of c-src gene express product (pp60c-src), MAb 327. The positive rates of pp60c-src in the fetal gastric epithelia, adult gastric epithelial inflammatory hyperplasia, intestinal glandular metaplastia and gastric carcinoma were 100.0% (12/12), 100.0% (30/30), 100.0% (16/16), 83.3% (40/48), respectively, all these pp60c-src positive rates were higher than that of adult normal gastric epithelia (60.0%, 12/20), a significant difference was noted statistically (P < 0.005). And there was statistical significant difference of pp60c-src express amount among different tissues (P < 0.005). The positive rates of pp60c-src in the intestinal and diffuse type gastric carcinomans were 100.0% (16/16) and 68.8% (22/32), respectively, a significant difference was found statistically (P < 0.025), the difference of pp60c-src express amount was significant (P < 0.05) but no significant differences of the positive rates and express amount of pp60c-src in the tissues adjacent to carcinoma of two types of carcinoma were found (P > 0.05). The results of this experiment indicated that the activation of c-src gene and increase of pp60c-src express were associated with the proliferation, turnover, transformation and malignant change of the gastric epithelial cells, with the initiation of the gastric carcinoma, and also with the differentiation and the histological types of the gastric carcinoma.