S100A4蛋白和上皮钙黏蛋白在大肠癌中的表达及意义

 目的　研究S100A4蛋白和上皮钙黏蛋白（E-cad）在大肠癌组织中的表达及其临床意义。方法　应用免疫组织化学SP法检测87例大肠癌组织及癌旁大肠组织中S100A4蛋白和E-cad的表达水平，分析S100A4和E-cad表达与大肠癌临床病理因素及术后5年生存率的关系。结果　在癌旁大肠组织腺上皮中S100A4蛋白不表达；在大肠癌组织中S100A4蛋白的表达率为64.4 %（56／87），与癌旁大肠组织比较，差异有统计学意义（P＜0.01）；S100A4蛋白在大肠癌组织中的表达与临床分期、淋巴结转移及5年生存率有关（P＜0.05），与其他临床病理因素无关（P＞0.05）。在癌旁大肠组织中E-cad 100 %表达；在大肠癌组织中E-cad的表达率为62.1 %（54／87）；与癌旁大肠组织比较，差异有统计学意义（P＜0.01）；E-cad在大肠癌组织中的表达与临床分期、淋巴结转移、肿块位置及5年生存率有关（P＜0.05），与其他临床病理因素无关（P＞0.05）。S100A4蛋白和E-cad在大肠癌组织中的表达呈负相关，但差异无统计学意义（r＝-0.087，P＞0.05）。结论　S100A4蛋白和E-cad与大肠癌的侵袭、转移及预后密切相关；S100A4蛋白可作为判定大肠癌临床病理特征及判断预后的重要指标。

Expression and significance of S100A4 and E-cadherin in colorectal carcinoma

Objective To investigate the expression and significance of S100A4 protein and Ecadherin in coloreetal carcinoma. Methods S-P immunohistochemical method was used to detect the expression of S100A4 and E-cadherin in 87cases with colorectal carcinoma and 87 cases with adjacent colorectal tissue, and the expression of S100A4 and E--cadherin were analyzed with relation to clinicopathologic factors and post-operative five-year survival. Results There was no expression for S100A4 protein in glandular epithelium of adjacent colorectal tissues. The positive expression rate of S100A4 was 64.4 %(56/87) in colorectal carcinoma. There was a significant difference between eolorectal carcinoma and adjacent group(P ＜0.01). The expression of S100A4 was positively correlated with the clinical stages, lymph node metastasis and five-year survival (P ＜0.05), but not with other clinicopathalagic factors (P ＞0.05). There was 100 % expression for E-cadherin in adjacent colorectal tissues. The positive expression rate of Ecadherin was 62.1%(54187) in colorectal carcinoma. There was a significant difference between colorectal carcinoma and adjacent group (P ＜0.01). The expression of E-cadherin was positively correlated with the clinical stages, lymph node metastasis, tumor site and five-year survival (P ＜0.05), hut not with other clinicopathologic factors (P ＞0.05). The expression of S100A4 was negatively correlated to E-cadherin in colorectal carcinoma without statistical meaning(r =-0.087, P ＞0.05). Conclusion S100A4 and E-cadherin are closely related with colorectal cancer invasion, metastasis and prognosis; S100A4 might be an important predictor of the clinicopathologic features and prognosis of eolorectal carcinoma.