细胞分裂周期蛋白42mRNA和蛋白在食管鳞癌中的表达及其病理生物学意义

目的 探讨细胞分裂周期蛋白42(Cdc42)在食管鳞状细胞癌(ESCC)中的表达及其与临床病理参数间的关系.方法 应用实时荧光定量-聚合酶链反应(qRT-PCR)、蛋白免疫印迹和免疫组织化学方法,从mRNA和蛋白两个水平检测ESCC中Cdc42的表达,并分析其与临床病理参数的关系.结果 22对新鲜ESCC与癌旁正常组织中,Cdc42 mRNA在ESCC中的表达量(0.21±0.14)显著高于其在癌旁正常组织中(0.16±0.12)的表达(P＜0.05);Cdc42蛋白在ESCC中的表达量(0.83±0.35)高于其在癌旁正常组织中(0.75±0.24)的表达;在175对ESCC中,Cdc42蛋白的阳性表达率为73.7%(129/175),高于其在配对的癌旁正常组织中的表达62.9%(110/175,P＜0.05).此外,Cdc42的表达与ESCC患者的年龄、淋巴结转移及分化程度明显相关(P＜0.05).结论 Cdc42可能参与ESCC发生及转移的过程.

Abstract：

Objective To explore the expression of cell division cycle 42 (Cdc42) in human esophageal squamous cell carcinoma (ESCC) and investigate the association between Cdc42 and clinicopathological parameters. Methods The expression levels of Cdc42 mRNA and protein in ESCC and corresponding adjacent normal tissues were detected by real-time fluorescent quantitative polymerase chain reaction ( qRT-PCR), Western blotting and immunohistochemistry, respectively. The correlations between Cdc42 expression and clinicopathological parameters were analyzed. Results The expression of Cdc42 mRNA was significantly higher in ESCC tissues (0. 21 ± 0. 14 ) than that in corresponding controls (0. 16 ±0. 12) (t test,P ＜0. 05). The protein expression of Cdc42 was significantly higher in ESCC tissues (0. 83 ± 0. 35 ) than that in corresponding controls ( 0. 75 ± 0. 24). Immunohistochemistry revealed that 73.7% (129/175) of the ESCC samples had higher expression of Cdc42 protein than the corresponding controls62. 9% (110/175) (χ2 test, P ＜ 0. 05 )]. Cdc42 expression level was correlated with age,lymphoid node metastasis and differentiation ( P all ＜ 0. 05 ), but not with the clinicopathological features,such as gender, ethnicity and macroscopical types (P ＞ 0. 05 ). Conclusion The higher expression of Cdc42 played a certain role in the carcinogenesis and metastasis of ESCC.

Expression of cell division cycle 42 and its clinicopathological significance in esophageal squamous cell carcinoma

Objective To explore the expression of cell division cycle 42 (Cdc42) in human esophageal squamous cell carcinoma (ESCC) and investigate the association between Cdc42 and clinicopathological parameters. Methods The expression levels of Cdc42 mRNA and protein in ESCC and corresponding adjacent normal tissues were detected by real-time fluorescent quantitative polymerase chain reaction ( qRT-PCR), Western blotting and immunohistochemistry, respectively. The correlations between Cdc42 expression and clinicopathological parameters were analyzed. Results The expression of Cdc42 mRNA was significantly higher in ESCC tissues (0. 21 ± 0. 14 ) than that in corresponding controls (0. 16 ±0. 12) (t test,P ＜0. 05). The protein expression of Cdc42 was significantly higher in ESCC tissues (0. 83 ± 0. 35 ) than that in corresponding controls ( 0. 75 ± 0. 24). Immunohistochemistry revealed that 73.7% (129/175) of the ESCC samples had higher expression of Cdc42 protein than the corresponding controls62. 9% (110/175) (χ2 test, P ＜ 0. 05 )]. Cdc42 expression level was correlated with age,lymphoid node metastasis and differentiation ( P all ＜ 0. 05 ), but not with the clinicopathological features,such as gender, ethnicity and macroscopical types (P ＞ 0. 05 ). Conclusion The higher expression of Cdc42 played a certain role in the carcinogenesis and metastasis of ESCC.