
KitContents
Reagentsprovidedinthekit
TheBrdUImmunohistostainingKithasbeendesignedforthestainingoftissuesthathavebeenfixed(usuallyinneutralbufferedformalin)andsubsequentlyembeddedinparaffinbeforesectioning.Thisprotocolisrecommendedasastartingpoint.Wheneverusinganewantibodyorimmunohistochemistrykit,optimizationbytheindividualend‐usermayberequired.
Note:
- Donotallowspecimenstodryduringthestainingprocedure.Specimendryingmaycauseincreasednon‐specificstainingandbackground.
- Sometissuemayneedtobaketoremoveover‐coveredparaffinpriortotheprocedure.Ifneeded,bakeat55‐60°Cfor30minutes.
I.Deparaffinizationandrehydration
Priortostaining,tissuesectionsmustbedeparaffinizedandrehydrated.Incompleteremovalofparaffincancausepoorstainingofthesection.
- Immerseslidesinxyleneandincubatefor5minutes.Repeattwicewithfreshxyleneforanother5minuteseach.
- Immerseslidesin100%ethanolfor5minutes,andfollowwithimmersionin95%,75%and50%ethanolfor3minuteseach.
- Rinseslideswithdistilledwaterfor5minutes;keepinwateruntilreadytoperformantigenretrieval.
II.Heatinducedantigenretrieval(HIAR)
Mostformalin‐fixedtissuerequiresanantigenretrievalstepbeforeimmunohistochemicalstainingcanproceed.Heatinducedantigenretrievalcanbeperformedusingasteamer,pressurecooker,oramicrowave.Theretrievaltimewritteninthisprotocolisbasedonusingaretrievalsteamer.Theheatingtimemayneedtobeadjustedifyouuseadifferentdeviceandmethod.
- FillplasticCoplinjar/containerwithAntigenRetrievalBuffer.
- PlacetheCoplinjar/containerinsteamer.
- Turnonsteamerandpreheatto90‐100°C.CarefullyputslidesintotheCoplinjar/containerandsteamfor40min(95‐100°C).
- Turnoffthesteamer,removetheCoplinjar,placeatroomtemperatureandallowslidestocoolfor20min.
- Rinseslidebyincubationofslideindistilledwaterfor3minutes.Repeatthissteptwiceandbeginstainingprocedure.
III.Stainingprocedure
PeroxidaseBlockingisoptional.Ifnonon-specificstainingisobserved,skipthesestepsandgotostep3.
- Tapoffexcesswater.Apply200μlormoreofPeroxidaseBlockingSolutionsufficienttocoverspecimen,andincubatefor5minutes.
- Rinseslidebyincubationofslideindistilledwaterfor3minutes.Repeatthissteptwice.
- Tapoffexcesswater.Apply200μlBlockingReagenttocoverspecimenandincubatefor5minutes.
- RinseslidebyincubationofslideinPBSfor3minutes.
- TapoffexcessPBS.Apply200μlEquilibriumBuffertocoverspecimenfor30minutes
- TapoffexcessEquilibriumBuffer.Apply200μlAnti‐BrdUAntibody(recommend1:50dilutioninAntibodyDiluents)tocoverspecimen,andincubateatroomtemperaturefor2hours.
- Rinseslidebyincubationofslidein0.5-2mLWashBufferfor3minutes.Repeatthissteptwicewithfreshbuffer.
- RinseslidebyincubationofslideinPBSfor3minutes.
- TapoffexcessPBS.Apply200μlRatHRPPolymertocoverspecimen,andincubatefor60minutes.
- Rinseslidebyincubationofslidein0.5-2mLWashBufferfor3minutes.Repeatthissteptwicewithfreshbuffer.
- RinseslidebyincubationofslideinwithPBSfor3minutes.
- TapoffexcessPBS.ApplyenoughDABSubstrateSolutiontocoverspecimen.Checkdarkbrowncolordevelopmentundermicroscopeandincubateuntildesiredstainintensitydevelops.
- Rinseslideintapwaterfor3minutes.
- Ifdesired,completecounterstain(Seeinstructionforhematoxylincounterstaining).Rinseintapwatertoclear.
- Immerseslidesin70%,80%,95%Ethanolfor2minuteseach,and100%Ethanolfor10minutestwicefollowinXylenefor5minutestwice.
- Dryandmountslides.
Tomake1mLDABSubstrateSolution,add25μLDABChromogento1mLof1XsubstratebufferwithH2O2
VI.InstructionforHematoxylincounterstaining
- Immerseslidesinhematoxylinsolution.Incubatefor30secondsto5minutes,dependingonthestrengthofhematoxylinused.
- RinsetoclearwithtapwaterandcontinuebydehydrationfromStep14.
Problems | PossibleCauses | Solutions |
Overstaining | 1.Toolongincubationtimeofprimaryantibody,ortoohightemperaturewhendoingstaining 2.ToolongincubationtimeofDABsubstrate. 3.Slidedriedduringstainingprocess | •Dependingontissuesections,theincubationtimeofprimaryantibodycanbereducedto2hours;Checktheroomtemperaturerangeisat20-250Cwhendoingstaining. •ReduceincubationtimeofDABsubstrate •Avoidsectionstodryduringstainingprocess. |
Weakornostaining | 1.Incompleteremovalofparaffin 2.Tissuesover‐fixation 3.Notefficientantigenretrieval 4.Reagentsnotusedinproperorderoromittedsteps 5.Expiredantibodyorreagents | •Deparaffinizesectionslongerorchangetofreshxylene;sometissuearraymayneedtobaketo removeover‐coveredparaffin. •Increasingtheconcentrationofprimaryantibodyto1:40;ifthisdoesnotwork,reducedurationof post‐fixation. •Adjustantigenretrievaltimebasedonthesettingforsectionfixationandretrievaldeviceused. •Reviewnotesandprocedureused. •Checkkitexpirationdatesandkitstorageconditions |
Highbackground | 1Sectionsdriedduringstainingprocess 2Slidenotrinsedthoroughly 3Antigenover‐retrieval | •Donotallowsectionstodryduringstainingprocess;usehumidcontainerduringincubation withprimaryantibody. •Usefreshsolutioninbufferjars;rinseatleastthreetimesbetweensteps. •Optimizeantigenretrievaltimeifyouusedmicrowaveorpressurecookerforretrieval. |
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一、免疫组化试剂盒一般包括:
1、特异性的一抗
2、免疫组化检测系统。
3、有的同时还具备显色系统。
二、不同的公司内容有差别,所以购买时一定了解清楚:
1、一抗是做人的还是兔、鼠的组织;
2、检测系统是ABC/SP/非生物素/其他;
3、试剂盒的内容都有什么?有没有显色系统?
4、如果没有,自己根据前面的检测系统需配哪个显色系统。(其他的辅助试剂如PBS缓冲液、抗原修复液等一般另卖或自配)
三、免疫组化抗体即指特异性一抗,是用来标记的指标,免疫组化过程的其他试剂一律另外配备。
另外:做实验时,如遇出结果困难,记得做阳性片对照,敢于怀疑检测系统或显色系统的问题。
用双氧水去除过氧化物酶时,我是自己配的3%双氧水滴到片上而非将片浸入双氧水,这样可否?
用博士德的DAB染色,配制方法为:1mlH20中加入DAB、H2O2、TBS各一滴,我配制的时候发现将DAB加入H20时很容易沉淀,要震荡才能混匀,且将配好的DAB滴到玻片上时,DAB会结为很小块的微颗粒悬浮在液体中但并不染色,是否DAB有问题?
现在打算换中衫的试剂盒,代理商说中衫的试剂盒包括了二抗和DAB,想请教一下该试剂盒的具体内容有些什么?
万分感谢!
上海好多的供应商的,具体还是看你选择了,其实试剂盒产品都差不多,什么远慕生物,古朵生物...好多的额

