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免疫电镜方法研究P-gp,p53蛋白,Bcl-2蛋白在肺癌组织中的表达; Immunoelectron microscopic analysis of P-glycoprotein,p53, and Bcl-2 proteins expressions in lung cancer
黄晓明 ; 李龙芸 ; 郭振泉
刊名中华肿瘤杂志
2001
关键词肺肿瘤 P-gp蛋白 p53蛋白 Bcl-2蛋白 免疫电镜
英文摘要目的从超微水平了解P-gp、p53蛋白、Bcl-2蛋白在肺癌组织中的表达,探讨它们与多药耐药(multidrug resistance, MDR)的关系和可能的作用机制。方法 8例非小细胞肺癌(NSCLC)手术标本和7例小细胞肺癌(SCLC)经支气管镜活检标本,用免疫电镜方法包埋后,以PAG标记抗体方法检测P-gp、p53蛋白、Bcl-2蛋白的表达。结果 P-gp主要位于胞膜和胞浆内质网附近;p53主要位于细胞核异染色质上,胞浆中也有存在;Bcl-2分布与线粒体和内质网有关。三者在15例肺癌中的表达率分别为33.3%(5/15)、60.0%(9/15)和26.7%(4/15)。8例手术获得的正常肺组织标本中,3种蛋白表达均为阴性。5例P-gp阳性的标本中,4例为NSCLC,仅1例为化疗后的SCLC。结论用免疫电镜方法检测,P-gp、p53蛋白、Bcl-2蛋白在肺癌中有一定的表达。P-gp与p53、p53与Bcl-2的表达无相关性。P-gp主要位于胞膜,支持其膜上药物输出泵的功能,其表达在肺癌的MDR中起一定作用,但不是惟一因素。; Objective To determine the ultrastructural localization of P-gp, p53 protein, and Bcl-2 protein in lung cancer cells,their relation to multidrug resistance and possible mechanisms of action. Methods Expression of P-gp, p53, and Bcl-2 proteins was examined in 8 NSCLC surgical specimens and 7 SCLC bronchoscopically biopsied specimens using postembedding PAG immunolabelling technique for electron microscopy. Results P-gp was detected on the cell membrane and the periphery of endoplasmic reticulum(ER). P53 protein was observed not only in the nuclei associated with heterochromatin but also in the cytosol. Bcl-2 protein immunoreactivity was associated with mitochondria and ER. P-gp, p53, and Bcl-2 were detected in 5(33%), 9(60%), and 4(26.7%) out of the 15 samples examined,respectively. In 8 normal lung tissues, these three proteins were detected. Of 5 P-gp positive samples 4 were NSCLC, only 1 was SCLC after chemotherapy. Conclusion P-gp, p53, and Bcl-2 proteins are detectable immuno-electron microscopically in lung cancer cells. No correlation in expression existed between of p53 and P-gp, nor did that between p53 and Bcl-2. The plasma membrane localization of P-gp supports its action as a transmembrane drug efflux pump. P-gp may play a role in MDR in lung cancer.; 中文核心期刊要目总览(PKU); 中国科学引文数据库(CSCD); 0; 1; 53-56; 23
语种中文
内容类型期刊论文
源URL[http://ir.pku.edu.cn/handle/20.500.11897/246753]  
专题生命科学学院
推荐引用方式
GB/T 7714
黄晓明,李龙芸,郭振泉. 免疫电镜方法研究P-gp,p53蛋白,Bcl-2蛋白在肺癌组织中的表达, Immunoelectron microscopic analysis of P-glycoprotein,p53, and Bcl-2 proteins expressions in lung cancer[J]. 中华肿瘤杂志,2001.
APA 黄晓明,李龙芸,&郭振泉.(2001).免疫电镜方法研究P-gp,p53蛋白,Bcl-2蛋白在肺癌组织中的表达.中华肿瘤杂志.
MLA 黄晓明,et al."免疫电镜方法研究P-gp,p53蛋白,Bcl-2蛋白在肺癌组织中的表达".中华肿瘤杂志 (2001).
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