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The study of the mismatch repair deficiency of sporadic colorectal cancer
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- Author:
- No author available
- Journal Title:
- CANCER RESEARCH AND CLINIC
- Issue:
- 6
- DOI:
- 10.3760/cma.j.issn.1006-9801.2005.06.003
- Key Word:
- 大肠癌;散发性;错配修复;微卫星不稳定;甲基化;免疫组化
Abstract： 目的探讨错配修复缺陷的散发性大肠癌的临床病理特征及错配修复缺陷检测手段的应用.方法对71例散发性大肠癌行hMLH1启动子甲基化检测、微卫星不稳定检测以及hMLH1和hMSH2的免疫组化检测,分析错配修复缺陷的散发性大肠癌的临床病理特征,探讨三种检测方法的应用价值.结果hMLH1基因启动子甲基化、微卫星不稳定和错配修复蛋白表达的阳性率分别为9.9%,9.9%和71.0%,三者密切相关.hMLH1启动子甲基化和微卫星不稳定的散发性大肠癌均具有结肠癌多发和低分化腺癌相对多见的特征.错配修复蛋白表达阴性的散发性大肠癌仅具有低分化腺癌相对多见的特征.结论错配修复缺陷的散发性大肠癌具有结肠癌和低分化腺癌多发的倾向,hMLH1启动子甲基化和微卫星不稳定以及错配修复蛋白的失表达三者密切相关.
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