磷酸化JAK和磷酸化ERK及CyclinD1蛋白表达与舌鳞状细胞癌的关系

目的:探讨磷酸化JAK和磷酸化ERK及CyclinD1蛋白在舌鳞状细胞癌(SCC)发生、发展中的作用及其表达的相互关系。方法:应用免疫组织化学技术,检测舌鳞状细胞癌30例,正常口腔舌黏膜组织20例,轻度上皮异常增生10例,中-重度上皮异常增生20例组织中磷酸化JAK和ERK及CyclinD1蛋白的表达情况。结果:与正常口腔舌黏膜相比,pJAK在舌鳞状细胞癌组织和上皮异常增生组织中阳性率明显增高(χ2=37.54,P<0.01),且舌SCC中pJAK的阳性率又明显高于上皮异常增生(χ2=12.28,P<0.05)。中-低分化鳞状细胞癌中pJAK的染色强度较高分化鳞状细胞癌显著升高(χ2=6.83,P<0.05)。pERK在正常口腔舌黏膜上皮、SCC组织和上皮异常增生组织中的阳性率差异无显著性。在SCC中,pJAK和CyclinD1的阳性强度呈正相关(rs=0.619,P<0.05)。pERK和CyclinD1的阳性强度无相关性(rs=0.231,P>0.05)。结论:SCC的发生与发展可能与pJAK信号传导途径诱导CyclinD1过度表达,从而促使该肿瘤细胞维持高增殖状态有关。ERK信号途径在舌鳞状细胞癌中可能不是主要的致瘤途径。

Expression of pJAK,pERK and Cyclin D1 proteins in squamous-cell carcinoma of tongue

OBJECTIVE: To investigate the expression of JAK, ERK and Cyclin D proteins in squamous-cell carcinoma of tongue. METHODS: The expression of JAK, ERK and Cyclin D1 proteins was determined with SP immunohistochemical method in 30 cases of lingual Squamous cell carcinoma, 20 of normal lingual mucosa, 10 of mild epithelial dysplasia and 20 of severe epithelial dysplasia. RESULTS: The expression of pJAK in lingual squamous-cell carcinoma and epithelial dysplasia was stronger than that of normal lingual mucosa (chi2=37.54, P<0.01), and the expression of pJAK in lingual squamous-cell carcinoma was significantly higher than that of the epithelial dysplasia (chi2=6.83, P<0.05). pJAK expression in squamous-cell carcinoma of low-middle differentiation was stronger than that of high differentiation. There was no significant difference in pERK expression among lingual squamous-cell carcinoma, normal lingual mucosa and epithelial dysplasia. There was a significantly positive correlation between pJAK and Cyclin D1 expression in SCC (r=0.619, P<0.05). There was no significant correlation between the expression of pERK and Cyclin D1 (r=0.231, P>0.05).CONCLUSION: Over-expression of pJAK and Cyclin D1 may be associated with the occurrence and development of squamous-cell carcinoma of the tongue.