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1、2-neu胞外域蛋白检测方法的建立?31O?中华检验医学杂志2006年4月第29卷第4期ChinJL丑bMed.Al2006.v0l29.No.4人血清HER一2/neu胞外域蛋白检测方法的建立刘彩云杨蔚杜红吴健孙素莲寿成超.肿瘤实验诊断研究.【摘要】目的建立乳腺癌患者血清HER-2/neu胞外域蛋白(ECD)水平检测方法,为乳腺癌治疗及预后判断提供参考.方法以识别HER-2/neu不同抗原表位的2种抗HER-2/neu单克隆抗体(McAb)为基础,建立可定量检测血清HER-2/neuECD水平的双抗夹心酶联免疫吸附试验法(ELISA
2、).结果本研究建立的HER-2/neuECD水平检测ELISA所用试剂[包括抗HER-2/neuMcAb5A12包被的酶标板,辣根过氧化物酶(HRP)标记的HER-2/neuMcAb1-2及HRP底物四甲基联苯胺(TMB)溶液]在1年内保持稳定;批内,批间变异系数分别为3.6%±4.2%,6.9%±3.3%;与HER-2ECD同源性很高的人表皮生长因子受体(EGFR/HER-1)ECD不发生交叉反应.自制ELISA试剂盒与BenderMedsystems试剂盒检测人血清HER-2ECD水平的相关性较好(r>0.75).健康人群(
3、20名)与乳腺癌患者(140例)血清HER-2ECD阳性率之间的差异无统计学意义(P>0.05),但与转移乳腺癌患者(10例)血清HER-2ECD阳性率之间差异有统计学意义(P<0.01).结论本研究建立的HER-2/neuECD双抗夹心ELISA检测方法特异,稳定,可靠,可定量检测乳腺癌患者血清HER.2/neuECD水平.【关键词】乳腺肿瘤;酶联免疫吸附测定;HER-2/neu胞外域EstablishmentofELISAtodetectⅡER.2/neuECDlevelsinhumanseraL1UCai.yun,N
4、GWe.DUHong,WUJ,sUNSu—lian.SHOUCheng—chao.SchoolofOncology.PekingUniversity.BeijingInstituteforCancerResearch.Beijing100034.CinaCorrespondingⅡr:S『OUCheng—chao,Email:cshou@vip.sina.com【Abstract】ObjectiveTodevelopanEusAmethodtomeasureHER-2/neuextraceHulardomain(ECD)levelsi
5、nseraforpredictingthetreatmentresponseandprognosisinpatientswithbreastcancer.MethodsAnti.HER.2/neumonoclonalantibo~esrecognizingtwodifferentepitopesonHER-2/neunamed5A12and1-2wereusedascaptureantibodyanddetectingantibodyrespectivelytoestablishasandwichenzyme-linkedimmuno
6、sorbentassay(EUSA);Homera~shperoxidaseactivitycanbemeasuredquantitativelyat450nnLResultsTheELISAKitcomponents,includinganti.HER-2/neuMcab5A12coatedonELISAplates,1-2labeledwitllHRPandtlleHRPsubstratesolution(0.01%3.3.5.5.tetramethylbenzidine,TMB)werestableforoneyear.Intr
7、a—andinter.Funimprecision(cv)were3.6%±4.2%and6.9%±3.3%.respectively.Nocross.reactionwitllhumanepidermalgrowthfactorreceptor(EGnHER-1)ECD,whichhasextensivehomologywitllHER-2ECD.wasfound.Therewasgoodcorrelation(r>0.75)】THER一2ECDlevelsinhumanserabetweenBenderMedsystemsa
8、ndourELISA:ThepositiverateofHER-2ECDinseraofhealthysubjectswasnodifferencetotllatofbreastcancerpatients(P>0