人胃癌裸鼠原位移植瘤P53、c-erbB-2癌基因蛋白免疫组化和超微结构的研究

为探讨胃癌的分子发病机制及为实验治疗提供理想动物模型，采用显微外科原位移植技术，将47例人胃癌标本移植裸鼠胃粘膜层，观察原位移植成瘤、侵袭和转移情况，及P53、c-erbB-2、raSP21癌基因的表达和形态学特征。从47例胃癌标本中筛选出的人胃腺癌、鳞癌、鳞腺癌三株裸鼠原位移植模型，对三种癌蛋白均呈阳性表达，并与肿瘤生长方式、侵袭浓度和淋巴结转移有关，超微结构观察发现移植瘤与来源人胃癌细胞相似。此模型可用于研究胃癌的分子发病机制、侵袭、转移及实验治疗。

IMMUNOHISTOCHEMISTRY AND ULTRASTRUCTURE STUDIES ON THE EXPRESSION LEVEL OF P53 AND c-ERBB-2 ORTHOTOPIC TRANSPLANTATION HUMAN GASTRIC CARCINOMA IN NUDE MICE

The aim of the study is to provide an ideal animal model for the research in the field of molecular pathogenesis and experimental treatment of gastric carcinoma. By the microsurgical technique, 47 human gastric carcinoma specimens were orthotopically transplanted into the gastric mucosal layer in nude mice. Its oncogenicity, invasion, metastasis and morphologic characteristics were observed and the expression of oncogene P53, c erbB 2 and raSP 21 were assessed. Three models of human gastric carcinoma, were adenocarcinoma, squamous cell carcinoma, squamous adenocarcinoma were screened from 47 cases of patients. The oncogene proteins were positively expressed and related to the growth pattern, depth of invasion and lymph node metastasis. Its ultrastructural characteristic was similar to the human original gastric cancer cells. These models are suitable and helpful for the research of the molecular pathogenesis, invasion, metastasis and experimental treatment of gastric carcinoma.