›› 2011, Vol. 23 ›› Issue (6): 425-428.doi: 10.3969/j.issn.1004-616x.2011.06.005

• 核辐射安全专家论坛 • 上一篇    下一篇

γ射线辐照对BEP2D细胞蛋白质组的影响

薛振伟,周小林,崔梅萍   

  1. 中国辐射防护研究院,山西 太原 030006
  • 收稿日期:2011-09-19 修回日期:2011-09-23 出版日期:2011-11-30 发布日期:2011-11-30
  • 通讯作者: 周小林

薛振伟,周小林,崔梅萍

XUE Zhen-wei,ZHOU Xiao-lin,CUI Mei-ping   

  1. China Institute for Radiation Protection, Taiyuan 030006, Shanxi, China
  • Received:2011-09-19 Revised:2011-09-23 Online:2011-11-30 Published:2011-11-30
  • Contact: ZHOU Xiao-lin

摘要: 目的: 利用蛋白质组学方法,研究与人永生化支气管上皮细胞 (BEP2D细胞)辐照相关的差异蛋白质,寻找辐射致肺癌早期诊断和治疗的新指标。方法:分别培养并收集了0、1.5和3.0 Gyγ射线辐照24 h后的BEP2D细胞样品,用双向凝胶电泳技术分离照射组与对照组细胞样品中的总蛋白质,应用基质辅助激光解吸电离飞行时间质谱 (MALDI-TOF-MS)得到相应的肽质量指纹图,并最终鉴定差异蛋白质。结果:质谱鉴定获得10张肽质量指纹图,经数据库搜索后8个蛋白点被初步鉴定(2个蛋白点无结果),其中1个蛋白点重复。用Mascot软件查询NCBInr数据库初步鉴定出7种差异表达的蛋白质,即亲环素A、肌球蛋白轻链2、细胞角蛋白9、α-烯醇酶、 磷酸丙糖异构酶1、Makorin环指蛋白1、c-myc启动子结合蛋白1。结论:所鉴定的7种蛋白与辐射诱导肺癌的发生、发展过程密切相关,为寻找辐射致肺癌早期诊断和治疗的新靶点提供了理论依据。

关键词: 蛋白质组, BEP2D细胞, γ射线, 亲环素A, 肌球蛋白轻链2

Abstract: OBJECTIVE: To identify the specific tumor markers of lung cancer induced by irradiation for diagnose and therapy by proteomics.METHODS:Samples of BEP2D cells irradiated with 0,1.5 and 3.0 Gy γ-rays for 24 h were cultivated and collected,and total protein was separated with the two-dimensional gel electrophoresis. The peptide mass fingerprints were obtained using matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF-MS)for differentially expressed proteins. RESULTS:10 peptide mass fingerprinting were revealed in the mass spectra identification,8 of them approved in the database (2 null),and 1 duplicated.There were 7 points identified in the initial tests by Mascot software in the NCBInr databates,such as cyclophilin A,myosin light chain 2,cytokeratin 9,α-enolase,triosephosphate isomerase 1,makorin ring finger protein 1,c-myc promoter-binding protein 1. CONCLUSION:The 7 proteins probably were the special proteins related to lung cancer induced by irradiation,which might be used for further study of the functions of the proteins.

Key words: proteome, BEP2D cell, γ- rays, cyclophilin A, myosin light chain 2