p73基因蛋白表达与老年人肺癌临床病理学特征及预后关系的探讨

目的探讨p73基因蛋白与老年人肺癌发生、发展的关系。方法应用免疫组化SABC法检测了65例老年人肺癌组织中抑癌基因p73基因蛋白的表达,并与癌旁组织和正常肺组织对比,同时结合肺癌的临床病理学特征及预后进行分析。结果老年人肺癌组织中p73基因蛋白阳性表达率(477%)明显高于癌旁组织(92%)和正常肺组织(46%),P<005;不同年龄组、不同类型和不同分化程度肺癌组织中p73基因蛋白的阳性表达率差异无显著性(P>005);Ⅰ期和Ⅱ期老年人肺癌组织中p73基因蛋白阳性表达率(605%)明显高于Ⅲ期和Ⅳ期(227%),P<005;生存3年或以上的老年人肺癌组织中p73基因蛋白阳性表达率(722%)明显高于生存3年以下者(160%),P<005。结论老年人与非老年人肺癌在p73基因蛋白免疫组化染色表达中有共同性,与正常肺组织或癌旁组织相比明显增加,对于进一步探讨p73基因蛋白在肺癌发生发展中的表达及调节有参考价值;p73基因蛋白表达在各型肺癌发生、发展中可能具有普遍意义,可作为判断老年人肺癌生物学行为和预后的一个参考指标。

p73 gene protein expression in lung cancer as related to clinicopathological characteristics and prognosis in the elderly

Objective To study the expression of p73 gene in lung cancer and tumorigenesis, progression of lung cancer in the elderly. Methods The expression of p73 protein in 65 cases of lung cancer, adjacent tissues of cancer and normal tissues was determined by immunohistochemical SABC method. The results were analysed by combining the clinicopathological data and the prognosis. Results The results showed (1)the expression level of p73 protein in the cancer group was significantly different from the rest groups(47 7%,9 2%,4 6%, P <0 05).(2)the p73 protein expression was not correlated with age,cancer type and grade of the tumor( P >0 05),but it was correlated with the clinical stage (60 5%,22 7%) and survival time of the patients (72 2%,16 0%, P <0 05). Conclusions The p73 protein expression in the elderly was the same as that in the none,and there was overexpression of p73 protein in lung cancer tissues of the elderly and none,so it was valuable to study the expression of p73 gene in tumorigenesis and progression of lung cancer. The expression of p73 protein was used as an useful marker of the biological behavior of lung cancer and as an independent prognosis factor for the patients with lung cancer in the elderly.