利用组织微阵列研究RASSF1A和Survivin基因在非小细胞肺癌中的表达

目的探讨RASSF1A和Survivin基因的蛋白表达与非小细胞肺癌（NSCLC）临床病理特征的关系及其临床意义。方法免疫组织化学法检测RASSF1A和Survivin在NSCLC组织微阵列中的蛋白表达。结果RASSF1A蛋白在NSCLC中的阳性率（46．8％〉显著低于正常肺组织（92．9％）（P〈0．001），但Survivin阳性率（75．8％）显著高于正常肺组织（0）（P〈0．001）；RASSF1A蛋白在临床Ⅰ期和Ⅱ期NSCLC中分别显著高于临床Ⅲ期（P〈0．001，P〈0．001），Survivin在临床I期和临床Ⅱ期NSCLC中的阳性率显著低于临床Ⅲ期者（P=0．003，P=0．001），淋巴结转移性NSCLC的RASSF1A阳性率显著低于无淋巴结转移者（P〈0．05）；RASSF1sA和Survivin蛋白在NSCLC中的表达呈负相关（r=-0．780，P〈0．001）。结论RASSFlA蛋白表达下调、Survivin蛋白高表达及其两者的表达失平衡在NSCLC的发生、发展中可能具有重要作用，RASSF1和Survivin有望成为评估肺癌淋巴结转移和预后预测的重要分子标志。

Study of expression of RASSF1A and Survivin genes in non-small cell lung cancer by tissue microarray

Objective To investigate the association between the expression of RASSF1A and Survivin proteins and clinicopathological characteristics in non-small cell lung cancer (NSCLC) and their clinical significance. Methods Expression of RASSF1A and Survivin proteins in the NSCLC tissue microarrays was detected by S-P Immunohistochemistry. Results The positive expression of RASSF1A in NSCLC (46.8 %) was significantly lower than that of in the normal lung tissues (92.9 %) (P < 0.001), but the positive expression of Survivin in NSCLC (78.5 %) was significantly higher than that of in the normal lung tissues (0%) (P<0.001). The percentage of RASSFI A protein expression in the stage Ⅰ and stage Ⅱ of NSCLC was evidently higher than that of in the stage Ⅲ (P<0.001, respectively), however, the percentage of Survivin protein expression in the stage Ⅰ and stage Ⅱ of NSCLC was significantly lower than that of in the stage Ⅲ (P=0.003, P=0.001). The percentage of RASSF1A in NSCLC with lymph node metastasis was observably lower than that of in cases without lymph node metastasis (P<0.05). Furthermore, there was observably negative correlation between expression of RASSF1A protein and that of Survivin protein in NSCLC (r=-0.780, P<0.001). Conclusion The loss expression of RASSF1A protein, over expression of Survivin protein and loss balance of expression of both RASSF1A and Survivin proteins in NSCLC might play important roles in the development and progression of NSCLC; RASSF1A and Survivin proteins might be acted as one helpful molecular marker to predict the lymph node metastasis and the prognosis of NSCLC.