Abstract
目的:本研究旨在探讨COX-2、β-cat和MMP-7表达与HNPCC特殊侵袭转移生物学行为间的关系。 方法:应用免疫组化SP法检测HNPCC(n=28)、散发性大肠癌(n=30)和正常大肠黏膜(n=10)中COX-2, β-cat和MMP-7的表达情况。所有标本预先经过hMSH2和hMLH1免疫组化染色筛查,并结合其临床病理特点进行回顾性分析。 结果:在HNPCC组和散发性大肠癌组中COX-2、异位β-cat和MMP-7的表达差异显著(χ^2=14.8352, P=0.0001; χ^2=5.6425, P=0.0175; χ^2=10.6454, P=0.0011)。两组异位β-cat和MMP-7的阳性率与大肠癌的侵袭深度和淋巴结转移密切相关(P=0.0127, 0.0001; P=0.0227, 0.0261),而与性别、肿瘤的大小和部位无关。COX-2在HNPCC组中与肿瘤侵袭深度相关(P=0.0166),与淋巴结转移无关;散发性大肠癌组中与肿瘤侵袭深度和淋巴结转移均无关。两组中COX-2、异位β-cat和MMP-7三者阳性表达呈正相关(COX-2与异位β-cat: r=0.417, P=0.011, r=0.504, P=0.006; 异位β-cat与MMP-7: r=0.396, P=0.027, r=0.429, P=0.021; COX-2与MMP-7: r=0.315, P=0.028, r=0.429, P=0.021)。 结论:COX-2、异位β-cat和MMP-7在HNPCC、散发性大肠癌和正常黏膜中的阳性表达率差异显著,这可能是HNPCC相对于散发性大肠癌侵袭弱、转移少的原因之一。
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