流式细胞术对食管癌组织中四种细胞周期调控蛋白的定量检测及意义

目的 探讨细胞周期调控蛋白cyclin E、cyclin D1、CDK4和D27在食管癌的表达及其与食管癌的分化和淋巴结转移的关系。方法 采用流式细胞术对65例食管鳞状细胞癌组织中cyclin E、cyclin D1、CDK4和p27的表达强弱进仃定量检测,结果 用荧光指数F1表示。结果 cyclin E、cyclin D1和CDK4在低分化型鳞癌的表达量显著高于分化型鳞癌(P值分别为0．0275,0．0001和0．0174);而p27在低分化型鳞癌的表达量显著低于分化型鳞癌(P=0．0042)。cyclin D1与cyolin E,cyclin D1与CDK4之间呈显著正相关;而cyclin D1与p27呈显著负相关。4种基因蛋白的表达与淋巴结转移均无相关性。结论 cyclhi E、cyclin D1、CDK4和p27的表达与食管癌的分化密切相关;正负性细胞周期调控蚩白表达的失衡是导致癌变的重要原因之一。

Flow cytometric detection and significance of four cyclins in esophageal cancer

Objective To study the expression and significance of cyclin E, cyclin D1, CDK4 and p27 protein in esophageal squamous cell cancer (ESCC) and their correlation with tumor differentiation and lymph node metastasis. Methods Expressions of cyclin E, cyclin D1, CDK4 and p27 protein in 65 patients with ESCC were quantitatively detected by flow cytometry. Results The expressions of cyclin E, cyclin D1, CDK4 in poorly differentiated ESCC were higher than those in well differentiated ESCC ( P =0.0275,0.0001,0.0174). The expression of p27 in poorly differentiated ESCC was lower than that in well differentiated ESCC ( P =0.0042). There was positive correlation between cyclin E and cyclin D1, cyclin D1 and CDK4, but negative correlation between cyclin D1 and p27. The expressions of all four proteins were not correlated with lymph node metastasis. Conclusion The expressions of cyclin E, cyclin D1, CDK4 and p27 are closely related to tumor differentiation of ESCC. An imbalance between positive and negative control of cell cycling might be critical in the carcinogenesis of esophageal squamous cell cancer.