ApplicationNotes | Immunohistochemistry:(<=1=""μg/ml)=""optimal=""working=""dilutions=""must=""be=""determined=""by=""end=""user.="">=>
ImmunohystochemicalStainingProcedures
ThefollowingprocedurewasdevelopedtolocalizeGADinratbrainsectionsofcerebellum.Performallstepsatroomtemperatureunlessotherwiseindicated.Wherenormalserumisindicated,usenormalserumfromthesamespeciesasthesourceofthesecondaryantibody.Thisprocedurerepresentssuggestedguidelinesfortheuseofanti-GAD.Fixationregimen,antibodyconcentrations,andincubationconditionsforagivenexperimentalsystemshouldbedeterminedempirically.
1.Perfuseratswith100mMphosphatebuffer,pH7.4,containing1%paraformaldehyde,0.34%L-lysine,and0.05%sodiumm-periodate(1%PLP).
2.Postfixbrainsin1%PLPfor1-2hours.Longerfixationtimesmayreducelabelingintensity.
3.Transferbrainsto100mMphosphatebuffercontaining30%sucrose,andgentlyagitateonashakerplatformat+4°Cfor48-60hours.
4.Usingaslidingmicrotome,cut30mmsectionsoffrozencerebellum.Asthesectionsarecut,collecttheminavialofcold100mMphosphatebuffer.
5.Incubatesectionsinphosphate-bufferedsaline(PBS)containing1.5%normalserumand0.2%TritonX-100for30minutes.
6.Onashakerplatform,incubatesectionswithanti-GAD(dilutedinPBScontaining1.5%normalserumand0.2%TritonX-100toafinalantibodyconcentrationof1mg/ml)for12-36hoursat+4°C.
7.Onashakerplatform,rinsesectionseighttimes,10-15minutesperrinse,inPBS.
8.Detectwithastandardsecondaryantibodydetectionsystem(Hsuetal.,1981;Falini&Taylor,1983;Harlow&Lane,1988;Taylor,1978).
9.Mountsections,dehydrate,andapplycoverslips. |