埃兹蛋白、上皮型钙黏着蛋白、桩蛋白、整合素β1蛋白在皮肤鳞状细胞癌中的表达

目的 探讨埃兹蛋白(ezrin)、上皮型钙黏着蛋白(E-cadherin)、桩蛋白(paxillin)和整合素β1(INTβ1)在皮肤鳞状细胞癌(SCC)中的表达及意义.方法 应用免疫组化法对30例SCC患者及10例正常对照者的ezrin、E-cadherin、paxillin和INTβ1表达进行检测.结果 正常人表皮角质形成细胞上均表达ezrin和E-cadherin(10/10),表达率显著高于SCC肿瘤细胞56.67％(17/30)和13.33％(4/30),x2分别为6.42和24.76,P值均＜0.05]；正常人表皮角质形成细胞上paxillin和INTβ1的表达率为0和10.00％(1/10),均显著低于SCC肿瘤细胞70.00％(21/30)和66.67％(20/30),x2分别为14.74和9.66,P值分别＜ 0.01和0.05].SCC肿瘤细胞ezrin和E-cadherin的表达呈显著正相关(r=0.52,P＜ 0.01),paxillin和E-cadherin、INTβ1与E-cadherin的表达均呈显著负相关(r值分别为-0.56和-0.52,P值均＜0.01)；ezrin与paxillin、Ezrin与INTβ1、paxillin与INTβ1的表达无相关性(r值分别为0.5、0.24和0,P值均＞0.05).结论 E-cadherin低表达、paxillin和INTβ1高表达可能共同促进肿瘤细胞的侵袭和转移；INTβ1与E-cadherin在SCC转移中可能起到拮抗作用.

Expressions of ezrin, E-cadherin, paxillin and integrin β1 in skin squamous cell carcinoma

Objective To investigate the expressions of ezrin,E-cadherin,paxillin and integrin β1 in skin squamous cell carcinoma (SCC) and their significance.Methods The expressions of ezrin,E-cadherin,paxillin and.integrin β1 were immunohistochemically detected in tissue specimens from 30 patients with SCC and 10 normal human controls.Results The expression rates of ezrin and E-cadherin in normal human keratinocytes were significantly higher than those in SCC cells 100.00％ (10/10)vs.56.67％(17/30),x2 =6.42,P ＜ 0.05; 100.00％ (10/10) vs 13.33％ (4/30),x2=24.76,P ＜ 0.05],while the expression rates of paxillin and integrin β1 in normal human keratinocytes were significantly lower than those in SCC cells 0.00vs.70.00％ (21/30),x2 =14.74,P ＜ 0.01; 10.00％ (1/10) vs.66.67％ (20/30),x2 =9.66,P ＜ 0.05].In SCC cells,there was a significant positive correlation between the expression of ezrin and E-cadherin (r =0.52,P ＜0.01 ),but a negative correlation between the expression of paxillin and E-cadherin and between that of integrin β1 and E-cadherin (r =- 0.56,- 0.52 respectively,both P ＜ 0.01); no significant correlation was observed between the expression of ezrin and paxillin or integrin β1,or between the that of paxillin and integrin β1 (r =0.5,0.24 and 0 respectively,all P ＞ 0.05).Conclusions The low expression of E-cadherin and high expression of paxillin and integrin β1 may synergistically promote the invasion and metastasis of tumor cells,while integrin β1 and E-cadherin may play an antagonistic role in the metastasis of SCC.