p53蛋白堆积和CK-18neo在非小细胞肺癌组织中的病理意义

Accumulation of p53 and cytokeratin-18neo in non-small cell lung cancer and its clinicopathological significance

目的 :检测非小细胞肺癌组织的p5 3蛋白堆积水平和细胞骨架蛋白 18新抗原决定簇 (cytokeratin 18neo-epitope,CK - 18neo)的暴露情况 ,探讨p5 3蛋白和CK - 18neo在肺癌发生发展过程中的作用及其临床病理意义。方法 :用免疫组化法检测 6 2例非小细胞肺癌以及 10例对照组织中p5 3蛋白的堆积和CK - 18neo的暴露情况。用显微图象分析仪测定p5 3免疫组化反应的强度 ,并作定量分析。以凋亡指数 (AI% )表示CK - 18neo的阳性检出率。结果 :①非小细胞肺癌组织中p5 3的阳性检出率为 48 39% (鳞癌为 5 1 72 % ,腺癌为 45 45 % ) ,对照组p5 3的阳性率为0 0 0 % (P <0 0 1) ;②非小细胞肺癌组织的AI%为 1 10 % (鳞癌 0 95 % ,腺癌 1 2 4% ) ,对照组为 1 0 6 % ,各组间无显著差异 ;③非小细胞肺癌组织中p5 3(- / + )、p5 3(5级 )和p5 3(PU)呈正直线相关关系 (P <0 0 1)。结论 :本实验结果提示 ,突变型p5 3基因可能参与NSCLC的发生机制 ,NSCLC的发生和发展与癌细胞的过度增生和细胞凋亡减少有关。

AIM: To investigate the tumorigenicity of lung cancer by learning the accumulation of p53 and the exposure of cytokeratin 18 neo-epitope(CK-18neo) related to the clinicopathological parameters in non-small cell lung cancer(NSCLC). METHODS: To detect the monoclonal antibodies of p53 and M 30 CytoDEATH(specific antibody for CK-18neo) in 62 cases of NSCLC (included 29 cases of squamous cell carcinoma and 33 cases of adenocarcinoma) and 10 cases of control group by adopting immunohistochemistry assay (LSAB). Moreover, the immunoreactivity of p53 was quantitatively evaluated with positive unit (PU). RESULTS: (1) p53 immunoreactivity was positive in 15 of 29 squamous cell carcinoma (51.72%), 15 of 33 adenocarcinoma (45.45%), 30 of 62 NSCLC (48.39%). In 10 control cases was negative. There were significant differences between these groups ( P< 0.01). (2)In 62 cases of NSCLC, AI% of M 30 is 1.10%, and in 29 cases of squamous cell carcinoma is 0.95%, and in 33 cases of adenocarcinoma is 1 24%. In 10 control cases, the AI% is 1.06%. There is not significant difference among these groups . (3) According to the results of Pearson's correlation analysis, we found positive linear correlation between the immunoreactivity of p53(-/+), p53(5 degrees)and p53(PU)( P< 0.01). CONCLUSION: Our results suggested that the pathogenesis of NSCLC might be related to the mutation of gene p53 and cell excessive proliferation and insufficient apoptosis. [