目的探讨表面增强激光解析离子化飞行时间质谱(SELDI-TOF-MS)技术在筛选神经管缺陷胎儿母亲尿液中蛋白质标志物的应用。方法经超声确诊为神经管缺陷胎儿的孕妇20例和正常孕妇15例。神经管缺陷包括脊柱裂10例,无脑儿5例,脑积水5例。所有...目的探讨表面增强激光解析离子化飞行时间质谱(SELDI-TOF-MS)技术在筛选神经管缺陷胎儿母亲尿液中蛋白质标志物的应用。方法经超声确诊为神经管缺陷胎儿的孕妇20例和正常孕妇15例。神经管缺陷包括脊柱裂10例,无脑儿5例,脑积水5例。所有孕妇均取清晨空腹尿5ml,离心后取上清,选用CM10芯片检测。采用PBSⅡC型蛋白质芯片阅读机读取数据。设定优化相对分子质量范围1000～30000Da。数据分析使用Ciphergen protein chip 3.1.1软件。结果共检测到39个尿液差异蛋白质峰,有统计学意义的差异蛋白质峰5个。病例组中有4种蛋白质高表达,相对分子质量分别为8320,8209,9099,10567;1种蛋白质低表达,相对分子质量3458。建立决策分类树,得到带有3个终结点的决策分类树,获得2个标志性蛋白质,分子量为9096,8244。进行留一法交叉验证后,神经管缺陷诊断模型的灵敏度为80.0%,特异度为93.3%。结论应用SELDI-TOF-MS技术可以在孕妇尿液中筛查出神经管缺陷的特异性蛋白质标志物,进一步可用于神经管缺陷产前早期无创诊断。展开更多
The protein profiles of the drug-resistant cell line K562/A02 and its sensitive parental cell line K562 were compared by using high resolution two-dimensional gel electrophoresis with IPG strip of pH 4\^7\5\^9. One pr...The protein profiles of the drug-resistant cell line K562/A02 and its sensitive parental cell line K562 were compared by using high resolution two-dimensional gel electrophoresis with IPG strip of pH 4\^7\5\^9. One protein spot was found to be differentially expressed, which was identified as the soluble resistance-related calcium binding protein（sorcin）. Tandem mass spectrometric analysis of one tryptic peptide by a TOF-TOF analyzer as well as the western blot analysis substantiates the result derived from peptide mapping fingerprint data.展开更多
文摘目的探讨表面增强激光解析离子化飞行时间质谱(SELDI-TOF-MS)技术在筛选神经管缺陷胎儿母亲尿液中蛋白质标志物的应用。方法经超声确诊为神经管缺陷胎儿的孕妇20例和正常孕妇15例。神经管缺陷包括脊柱裂10例,无脑儿5例,脑积水5例。所有孕妇均取清晨空腹尿5ml,离心后取上清,选用CM10芯片检测。采用PBSⅡC型蛋白质芯片阅读机读取数据。设定优化相对分子质量范围1000～30000Da。数据分析使用Ciphergen protein chip 3.1.1软件。结果共检测到39个尿液差异蛋白质峰,有统计学意义的差异蛋白质峰5个。病例组中有4种蛋白质高表达,相对分子质量分别为8320,8209,9099,10567;1种蛋白质低表达,相对分子质量3458。建立决策分类树,得到带有3个终结点的决策分类树,获得2个标志性蛋白质,分子量为9096,8244。进行留一法交叉验证后,神经管缺陷诊断模型的灵敏度为80.0%,特异度为93.3%。结论应用SELDI-TOF-MS技术可以在孕妇尿液中筛查出神经管缺陷的特异性蛋白质标志物,进一步可用于神经管缺陷产前早期无创诊断。
文摘The protein profiles of the drug-resistant cell line K562/A02 and its sensitive parental cell line K562 were compared by using high resolution two-dimensional gel electrophoresis with IPG strip of pH 4\^7\5\^9. One protein spot was found to be differentially expressed, which was identified as the soluble resistance-related calcium binding protein（sorcin）. Tandem mass spectrometric analysis of one tryptic peptide by a TOF-TOF analyzer as well as the western blot analysis substantiates the result derived from peptide mapping fingerprint data.
