胃腺癌微环境caveolin-1的表达及其临床意义

背景：肿瘤的发生、发展是肿瘤微环境中肿瘤实质与间质成分共同作用的结果。目前仅少数研究探讨胃癌微环境小窝蛋白-1（caveolin-1）的表达情况、目的：探讨胃腺癌微环境caveolin-1的表达及其临床意义。方法：收集外科胃腺癌手术切除标本72例,32例正常胃窦黏膜组织作为对照,以免疫组化法检测实质和间质中的caveolin-1和原癌基因蛋白c-myc表达,分析胃癌实质caveolin-1表达与c-myc以及主要肿瘤临床病理特征的相关性。随机选取7例冰冻标本,激光捕获显微切割（LCM）技术获取纯净胃癌和癌旁组织实质和间质细胞,蛋白质印迹法检测caveolin-1和c-myc表达并行相关性分析。结果：常规标本中,胃癌实质和间质caveolin-1高表达率分别显著低于正常胃黏膜实质和间质（P〈0.05）：胃癌实质高表达c-myc,并与caveolin-1呈正相关（r=0.312,P〈0.05）胃癌实质caveolin-1高表达与肿瘤浸润深度、淋巴结转移、TNM分期呈负相关（P〈0.05）。LCM标本中,胃癌实质和间质caveolin-1表达分别显著低于相应癌旁组织实质和间质（P〈0.05）。caveolin-1与c-myc在胃癌实质中的表达呈正相关（r=0.752,P〈0.05）,在胃癌间质中的表达呈负相关（r=-0.975,P〈0.05）。结论：胃腺癌微环境低表达caveolin-1。胃癌实质caveolin-1高表达与肿瘤浸润、转移、临床进展呈负相关。c-myc可能通过不同机制调节胃癌实质和间质中的caveolin-1表达。胃癌间质caveolin-1低表达有望为胃癌预后判断提供依据。

Expression and Clinical Significance of Caveolin-1 in Microenvironment of Gastric Adenocarcinoma

Background:Tumorigenesis and progress is the result of combined action of parenchyma and stroma in tumor microenvironment.The expression of caveolin-1 in microenvironment of gastric cancer has been seldomly investigated. Aims:To investigate the expression and clinical significance of caveolin-1 in microenvironment of gastric adenocarcinoma (GAC).Methods:Seventy-two surgical resected specimens of GAC and thirty-two normal antral specimens as controls were obtained for immunohistochemical assessment of the ex...