title: Expression of the c-Met proto-oncogene and Integrin α5β1 in human gastric cardia adenocarcinoma.
abstract: The hepatocyte growth factor receptor c-Met, a receptor tyrosine kinase, and Integrin α5β1, one of the main ECM receptors of hepatocytes have been reported to play important roles in tumor growth by activating mitogenic signaling pathways. In human gastric cardia adenocarcinoma, however, expression of the c-Met and Integrin α5β1 have not been reported. Here we examined the mRNA levels and protein expressions of these two genes and their relationship in human normal gastric cardia mucosa and primary carcinomas. Quantitative real-time PCR was used to analyze the mRNA expression of both c-Met and Integrin α5β1. The relationship between c-Met and Integrin α5β1 expression and the histologic characteristics of tumors were studied. Western blot analysis was performed to investigate the presence of c-Met and Integrin α5β1. The expression patterns of c-Met and Integrin α5β1 in 45 frozen slides of cardia adenocarcinoma were identified by immunohistochemistry. Our results indicate that the expression of c-Met and of Integrin α5β1 was significantly associated with tumor differentiation, TNM, and metastasis via the lymphogenic route. A significant positive correlation was also found between c-Met and Integrin α5β1 mRNA expression, suggesting that expression of c-Met and Integrin α5β1 has mechanical significance in the early stages of human gastric cardia adenocarcinoma.
authors.affiliation: Department of General Surgery, The First Hospital of China Medical University, Shenyang 110001, China.
authors.forename: Fusheng
authors.initials: F
authors.lastname: Chi
authors.forename: Da
authors.initials: D
authors.lastname: Fu
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Zhang
authors.forename: Zhongwei
authors.initials: Z
authors.lastname: Lv
authors.forename: Zhesheng
authors.initials: Z
authors.lastname: Wang
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D000328:Adult; D000368:Aged; D001706:Biopsy; D015153:Blotting, Western; D002299:Cardia / Q000378:metabolism* / Q000473:pathology; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D039081:Integrin alpha5beta1 / Q000235:genetics* / Q000378:metabolism; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D000090063:Proto-Oncogene Mas; D019859:Proto-Oncogene Proteins c-met / Q000235:genetics* / Q000378:metabolism; D012333:RNA, Messenger / Q000096:biosynthesis; D060888:Real-Time Polymerase Chain Reaction; D015398:Signal Transduction; D013274:Stomach Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000473:pathology
chemical_list: D039081:Integrin alpha5beta1; C000715470:MAS1 protein, human; D000090063:Proto-Oncogene Mas; D012333:RNA, Messenger; D019859:Proto-Oncogene Proteins c-met