简介:摘要目的为鉴定口腔鳞癌的血清标志物和病理分型提供依据。方法采用表面增强激光解吸电离飞行时间质谱(SELDI-TOF-MS)技术及其配套的金芯片(GoldChip)对30份腺癌及健康人30份计60份血清,进行蛋白质谱指纹图分析,筛选口腔鳞癌的差异蛋白。结果在口腔鳞癌患者血清中有3个高表达,m/z(质荷比)分别是9194.06Da,11681.15Da和51370.19Da,应用数据建立分类树模型,获得了一个由7个蛋白9194.06Da,51370.1Da,15879、1Da,6624.57Da,8929.80Da,1l681.1Da,1013.77Da组成的标志蛋白组合模式。在训练组中,该模型的敏感性和特异性分别为92%和96%。结论该模型对诊断口腔鳞癌具有较高的灵敏度和特异度,值得临床应用。
简介:摘要表面增强激光解析电离-飞行时间-质谱(SELDI-TOF-MS)技术是近年来蛋白组学研究的先进技术,文章主要介绍该技术在以下方面的应用寻找不同亚型非霍奇金淋巴瘤、儿童急性淋巴细胞白血病的潜在的生物标志物和探讨苯致白血病的发病机制;儿童急、慢性免疫性血小板减少症的早期诊断和预后监测;以及预测镰状细胞贫血患者急性疼痛发作的频率和严重程度,可能与载脂蛋白A1和血清淀粉酶A水平有关。
简介:目的:用表面增强激光解吸电离飞行时间质谱(SELDI-TOF-MS)筛选预测肺鳞癌患者顺铂+吉西他滨(GP)方案化疗敏感性的血清蛋白标志物。方法:65例接受GP方案化疗的肺鳞癌患者,分为化疗敏感组44例,化疗耐药组21例,应用SELDI-TOF-MS技术检测患者治疗前血清标本的蛋白质质谱,分析疗效不同患者间的差异蛋白表达。结果:本实验共检测到89个有效的蛋白质波峰,其中m/z位于分子质量2000~10000的波峰有35个。质荷比(m/z)为7458.12Da的蛋白峰建的预测模型可预测肺鳞癌患者对GP化疗方案的敏感性,敏感性86.56%,特异性88.51%。结论:应用SELDI-TOF-MS技术可筛选的血清蛋白标志物,为预测肺鳞癌患者对化疗方案的敏感性提供了新的手段。
简介:TheproteomicsofthedifferentialproteinexpressionsinhumangliomacelllineU251cellsinfectedwithhumancytomegalovirus(HCMV)wasinvestigatedattheproteinlevelbyusingthesurfaceenhancedlaserdesorption/ionization(SELDI)proteinchipsysteminordertodevelopamethodofstudyforthepathogenesisofHCMVinfection.Inthisstudy,theculturedU251cellswereinfectedwithHC-MVingoodconditionandthesupernatantsoflysatesandtheextracellularfluidsofthecultivatedinfect-edcellswerequantitativelydefinedfortheexpressedproteins.TheproteomicsofthedifferentialproteinexpressionincellsbeforeandafterinfectionwasanalyzedbyWCX2arraysontheproteinchipreader.Itwasdemonstratedthatthecytopathiceffectsofinfectedcellsappearedonthe5thdayafterinfection,however,thedifferentialproteinexpressionwasevidentat6hafterinfectionasrevealedbyRT-PCRandmassspectrometry.Theproteinpeakscapturedfromdifferentbatchesofsamples,fromthesamesampledetectedwithdifferentarraysorforthedifferentlimeswereallequivalent.Withthemolecularweightrangefrom2000Dato3000Da,chipcaptured82peaksfromtheintracellularfluidsand11proteinpeakfromthecellularfluidinwhichcomparedwiththecontrolgroup,theproteinpeakswithmolecularweightof13536.3Da,10046.1Daand17106.2Dawereclosetothoseofβ-amyloidpro-tein,caspase-1precursorandLPS-inducedTNF-αfactorrespectively,whichshowedbriefup-regulation4hafterinfection,andcontinuedtoraise48hlater.Theseresultsinferthattheseproteinsmaybere-latedtotheapoptosisinducedbyHCMVinfection,thussuggestingthattheapeptosisinducedbyHC-MVinfectionmayplayaroleinthepathogenesisofHCMVinfection.