美国
PeproTech(派普泰克)公司是世界上领先的重组
细胞因子和蛋白生产商,同时也生产多种细胞因子和蛋白的
ELISA法检测
试剂盒,详细信息请查看www.peprotech.com,或与PeproTech中国代表处(电话:0512-68325993,Email:china@peprotechasia.com)联系。
为让中国用户能够更好的熟悉和掌握PeproTech的
ELISA试剂盒及其技术,PeproTech专门制作了"
ELISA操作指南视频",供各位老师和同学观摩!
视频网址为:http://v.youku.com/v_show/id_XMzQ3Mzk3NTg4.html 或http://www.tudou.com/programs/view/tzU8m93o0tI/,欢迎大家的批评和指正!
该视频为英文讲解,为便于大家理解,请看下面的
英文原文及翻译:
ThefollowingvideotutorialdescribedhowtorunasandwichELISA,alsoknownasenzyme-linkedimmunosorbentassay,usingageneralPeproTechprotocol.
接下来的实验指导讲述PeproTech
夹心法ELISA,即酶联免疫吸附试验的通用步骤
Thecapture,standard,anddetectionaresuppliedasstablelyophilizedproducts,andshouldbestoredat-20℃untilreadyforuse.
捕获
抗体、
标准品和检测抗体均为冻干粉,使用前应保存于-20℃
ReconstitutedCapture,Standard,andDetectioncomponentsareonlyguaranteedtobestableforupto2weekswhenstoredat4℃.
捕获抗体、标准品和检测抗体重悬后,在4℃时最长保存2周。
IfyouhavereconstitutedtheEDK,andplanonusingitforadurationgreaterthantwoweeks,aliquotandstoreat-20℃forupto6months.
如果您已重悬了EDK的各组份,并准备在2周之后使用,请将重悬的组分分装并冻存于-20℃,最长可保存6个月。
IncontrasttotheotherthreeEDKcomponents,theAvidin-HRPvialcomesreadytouse
与EDK的其它三个组分不同,Avidin-HRP为即用型
Inordertoavoidharmfulrepeatedfreeze/thawcycles,orlong-termstorageat4℃w
hichmeanadvisoryfunctionality.AliquottheAvidin-HRPintoten6uLvialsuponreceiptandstoredat-20℃arestableforup2yearsfromthedateofreceipt.
目的是避免反复冻融或长期4℃保存对该组分的功能损害。收到Avidin-HRP后,立即将其分装为6ul/管,共10管,冻存于-20℃,最长可保存2年
Phase1:
第1阶段:
Coatingtheplatewithcaptureantibody
捕获抗体包板
Centrifugethevialbrieflytobringthecaptureantibodytothebottom
将捕获抗体稍作离心,使抗体集中于管底
Reconstitutethecapturebodyinsterilewatertotheconcentrationspecifiedonthedatasheet.Andallowthevialtobereconstitutedforminimum10minutes.
用无菌水将捕获抗体重悬至说明书上要求的浓度,静置10分钟以使抗体完全溶解
Centrifugethereconstitutedvialfor3minutesatmaximumspeed
重悬的抗体以最高速度离心3分钟
Dilutethecaptureantibodyin1×PBStotheconcentrationspecifiedonthedatasheet.
用1xPBS稀释捕获抗体至说明书上要求的浓度
Gentlymixorvortexthevial,trytoensuretheairbubblesdon’tmixintothesolution,
轻轻颠倒或振荡混匀,一定不要产生气泡
Immediatelyadd100ulofthecaptureantibodysolutionintotheELISAplatewells.
立即在每个ELISA板孔中加入100uL捕获抗体
Pressfirmlytosealtheplate,takecarenottoletthereagentsplashonthefilm
将封板膜用力压盖在ELISA板上,注意不要使抗体滴溅在封板膜上
Incubatedtheplateovernightat25℃,alternativelytheincubationforthisphasecanbedoneat37℃for2-4hours
25℃孵育过夜,或者37℃孵育2-4个小时
Towashtheplate,discardtheliquidandblotonacleanpapertowel,
洗板时需将液体倒掉,并在干净的吸水纸上拍干
Add300ulofthewashbuffertoeverywellandthenaspiratetheplate
每孔加入300ul洗液,然后再将液体吸除
Repeatthestepthreeadditionaltimes,totalingfourwashesinall.
该步骤再重复3次,总共洗涤4次
Afterthelastwash,inverttheplatetomoveliquid,andblotonacleanpapertowel.
最后一次洗涤后,将板倒置以去除液体,并在干净的吸水纸上拍干
ThereareseveralothermethodstowashanELISAplate.
ELISA板还有其它几种洗涤方法。
Whateveryouchoose,beconsistentwithyourwashingtechniquethroughoutthewholeprocess.
无论使用哪种方法,请在整个ELISA实验过程中保持一致
Phase2:Blockingnon-specificbinding
第二阶段:封闭非特异性结合
Bovineserumalbuminisusedastheblockingreagenttoblockanyunboundopensiteswithintheplasticwells
牛
血清白蛋白作为封闭试剂,可封闭塑料孔内任何未结合蛋白的位点
Add300uloftheblockingbuffertoeachwell.
每孔中加入300ul封闭液
Sealtheplateandincubateforatleast1hourat25℃.
封板,并在25℃孵育至少1小时
Phase3:
第3阶段:
Specificbindingofantigen
抗原的特异性结合
Prioritytotheendofthepreviousincubationperiod
在上一孵育过程结束前
Centrifugethestandardvialbriefly
将标准品稍作离心
Andreconstitutetothespecifiedconcentrationinsterilewater.
并用无菌水重悬至要求的浓度
Allowthevialtoreconstituteforminimum10minutes.
静置至少10分钟,以使标准品完全溶解
Whentheincubationperiodisover,removetheplateandwashfourtimes
重悬结束后,取出板并洗涤4次
Centrifugethereconstitutedstandardvialfor3minutesatmaximumspeed
重悬的标准品以最高速度离心3分钟
Dilutetothespecifiedconcentration,andgentlymixorvortexthesolution.
稀释到所需浓度,轻轻颠倒或振荡混匀
Thestandardcurveistheareaontheplatededicatetofixedconcentrationsofourproteinstandard
标准曲线在ELISA板上的区域专用于检测已知浓度的蛋白标准品
Ifusingamulti-channel
Pipette,firstlyadd100ulofthediluenttoallstandardcurvewellsexceptforthefirstrow
如果使用多道
移液器,除第一列外的所有标准曲线孔中均加入100ul稀释液
Next,add200ulofstandardsolutiontothefirstrowofstandardcurvewells.
然后,在标准曲线孔的第一列中加入200ul标准品溶液
Dilute1:2downtheplatetoaminimumofsixconcentrations
依次倍比稀释,标准品至少有6个浓度
Eachstandardcurvewellshouldcontainthefinalvolumeof100ulofthesolvent.
每个标准曲线孔中液体的终体积应为100ul
Usingtheminimumsixconcentrationsinthetriplicate,plusaminimumsixwellsofblankscontainingonlydiluent.
标准品至少有6个浓度,每个浓度为3个复孔,再设6个空白孔,其中仅含稀释液
Theseblanksareessentialandlaterdeterminingtheefficacyand
ABIlityofthemeasurementsofthesamples.
空白孔是必须的,它们将用来评价试剂盒检测样本的效能
Next,addyourspecificsamplesofinterestintriplicatetotheremainingwells
然后,在剩余孔中加入待测样本,每个样本设3个复孔
Dependingontheconcentrationoftheanalyte,dilutionmaybenecessaryforoptimalresults
样本中若待检抗原的浓度过高,要得到最佳结果可能需对样本进行稀释
Sealtheplateandincubatefortwohoursat25℃.
封板,25℃孵育2小时
Phase4:
第4阶段:
Sandwichformationviatheadditionofbiotinylateddetectionantibody.
加入生物素标记的检测抗体以形成夹心
Prioritytotheendoftheincubation,centrifugebrieflyandreconstitutethedetectionantibodyfortenminutesinsterilewater.
孵育结束前,稍离心检测抗体,并用无菌水重悬,静置10分钟
Whentheincubationisover,removetheplateandwashfourtimes.
孵育结束后,取出板,洗涤4次
Centrifugefor3minutesatmaximumspeed
最高速度离心3分钟
Anddilutethedetectionantibodyindiluenttothespecifiedconcentration.
用稀释液将检测抗体稀释至要求的浓度
Gentlymixthesolutionandimmediatelyadd100ulperwell
轻轻混匀,立即在每孔中加入100ul检测抗体液
Sealtheplateandincubatefor2hoursat25℃
封板,25℃孵育2小时
Phase5:
第5阶段:
Additionoftheenzyme-linkedAvidin-HRPtothesandwich
夹心上加酶联亲合素(Avidin-HRP)
Whiletheplateisincubating,removeone6ulaliquotofAvidin-HRPfromthefreezerandletitthaw.
板在孵育过时,从冰箱中取出一管Avindin-HRP(6ul),使其融化
Whentheincubationisover,washtheplate4times
板孵育结束后,洗涤4次
DilutetheAvidin-HRP1:2000indiluent
用稀释液1:2000稀释Avidin-HRP
Gentlymixthesolutionandimmediatelyadd100ulperwell.
轻轻混匀,立即向每孔中加入100ul
Sealtheplateandincubatefor30minutesat25℃.
封板,25℃孵育30分钟
Toreducethebackgroundinterference,ensuretheincubationisfor30minutesonly.
为降低背景干扰,请确保孵育时间正好为30分钟
Phase6:Conversionofthecolorlesssubstrateintoacoloredsolution.
阶段6:底物显色
Promptlywashedtheplateafterincubationandadd100ulofABTSsubstratesolutiontoeachwell.
孵育结束后,立即洗板。每孔加入100ulABTS底物溶液
UseanAvidin-HRPinconjunctionwithABTSonly.
Avidin-HRP仅可与ABTS配合使用
UsingitinconjunctionwithTMBorothersubstratesolutions,mainlytoadramaticriseinbackgrounddevelopment
如与TMB或其它底物溶液配合使用,会显著提高背景显色
Incubateatroomtemperatureforcolordevelopment
室温孵育显色
Monitortheplateat5-minuteintervalsforupto60minutes.
每隔5分钟读板一次,最长可监测60分钟
UsingaELISAplatereadersetatappropriatewavelengthcorrectionforyourselectedplate
在
酶标仪上设置合适的校正波长
ODre
ADIngswillvarydependingonthespecificEDKanditsreadingtimeprovidedontheproductdatasheet.
EDK不同,以及说明书上所要求的读板时间不同均可能导致OD值的差异
PeproTech(派普泰克)中国代表处 江苏省苏州市金河国际大厦1918室 邮编:215011 电话:0512-68325993/68325983 Email:china@peprotechasia.com
Website:www.peprotech.com