大肠癌患者血清及癌细胞胃泌素表达与其临床生物学行为的关系

目的　观测大肠癌患者血清、癌组织中胃泌素的表达 ,观察大肠癌细胞内胃泌素分泌颗粒的超微结构 ,旨在探讨血清胃泌素、胃泌素型癌细胞与大肠癌临床生物学行为的关系。方法　用放射免疫法和免疫组化法检测 5 3例大肠癌患者血清胃泌素、癌组织中胃泌素的表达。用免疫电镜技术观察 10例大肠癌细胞内胃泌素分泌颗粒的超微结构。结果　与对照组比较 ,大肠癌组术前血清胃泌素水平明显增高 ,分化良好者增高尤为明显 (P <0 .0 5 ,P <0 .0 1)。大肠癌组织胃泌素免疫组化阳性率为 5 6.6% ( 3 0 /5 3 ) ,高分化腺癌阳性率明显高于中、低分化腺癌。胃泌素阳性胶体金颗粒见于癌细胞内不同电子密度的分泌颗粒中和微绒毛膜表面。结论　大肠癌患者血清胃泌素水平增高 ,癌组织胃泌素表达阳性 ;大肠癌细胞形成胃泌素分泌颗粒释放胃泌素 ;血清胃泌素、胃泌素型癌细胞与大肠癌临床生物学行为有密切关系。

Relationship betwent surum gastrin and the expression of gastrin in the cancer cell with the clinical behavior of patients with colorectal carcinoma cancer

Objective To determine the serum gastrin level, the expression of gastrin in colorectal carcinoma cells and observe the ultrastructure of gastrin secretory granule in colorectal carcinoma cells,in order to explore the relationship between gastrin and clinical behavior of colorectal carcinoma. Methods The serum gastrin and gastrin expression in colorectal carcinoma tissues of the 53 cases were examined by using radio-immunity analysis(RIA), immunohistochemistry and immunoelectron microscopic technique. Results Compared with control group,the preoperative level of serum gastrin in colorectal group was significantly increased, especially in well-differentiation adenocarcinoma . In the tissue of colorectal carcinoma, the gastrin expression rate was 56.6%. The expression rate of well-differentiated adenocaroinoma was higher than that in moderate and poor differentiation adenocarcinoma. Immunoelectron microscopy showed that the granules of protein A-gold (PAG) could be seen in different electro- density secretion granules in carcinoma cells, in intercellular space and on the surface of membrane of microvillus.Conclusions The level of serum gastrin and the expression of gastrin in cancer tissues in colorectal carcinoma patients are increased. The colorectal carcinoma cells may synthesize and secrete gastrin themselves, which may be correlated with clinical behavior of colorectal carcinoma.