Overview | ![]() PrinterFriendlyVersion |
Ex/Em(nm) | 630/None |
MW | N/A |
CAS# | N/A |
Solvent | N/A |
Storage | F/D/L |
Category | IonChannels ChlorideChannels |
Related | pHandIonIndicators BiochemicalAssays |
1.Preparecells:
1.1 Foradherentcells:Platecellsovernightingrowthmediumat40,000to80,000cells/well/100µLfora96-wellplateor10,000to20,000cells/well/25µLfora384-wellplate.
1.2 Fornon-adherentcells:CentrifugethecellsfromtheculturemediumandthensUSPendthecellpelletinpre-warmedassaybufferat125,000to250,000cells/well/100µLfora96-wellpoly-Dlysineplateor30,000to60,000cells/well/25µLfora384-wellpoly-Dlysineplate.Centrifugetheplateat800rpmfor2minuteswithbrakeoffpriortotheexperiments
Note:Eachcelllineshouldbeevaluatedonanindividualbasistodeterminetheoptimalcelldensity.
2.Prepareiodideassayreagents:
2.1 Warmallthereagentstoroomtemperaturebeforeuse.
2.2 Make1XI-sensorenhancersolution:Add50µLof100XIodidesensorenhancer(ComponentB)to5mLofsterileH2O,andmixthemwell.
Note1:1XI-sensorenhancersolutionisnotstable,usewithin2hoursafterthedilution.
Note2:EachcelllineshouldbeevaluatedonanindividualbasistodeterminetheoptimaldilutionofI-sensorenhancersolution.Wenoticedthat0.1XI-sensorenhancersolutionworksevenbetterforsomecelllines.
2.3 Make1Xcelllysisbuffer:Addthewholevialof10XCellLysisBuffer(ComponentD)to45mLofsterileH2O,andmixthemwell.
Note:5mLof1Xcelllysisbufferisenoughforoneplate.Storeunused1Xcelllysisbufferat4oC.
3.Foriodideeffluxassay:
3.1 Aspiratethegrowthmediumfromthecellplate.
3.2 Add100µL/well(96-wellplate)or25µL/well(384-wellplate)ofpre-warmedI-LoADIngBuffer(ComponentC)andincubatefor2-4hours.
3.3 Aspiratetheiodideloadingbuffercompletely,andwashthecellswithDPBSorHBSSatleast3times.
3.4 TreatthecellswithagoNISTinHBSSbufferfor5minutes.
Note:Forantagonistsscreen,incubatethecompoundswithI-loadingbufferforatleastanadditional30minbeforethecellswerewashedwithDPBSorHBSSbuffer.
3.5 Aspiratethesupernatant.
3.6 Lysethecellsbyadding50µL/well(96-wellplate),or25µL/well(384-wellplate)of1Xcelllysisbuffer(fromStep2.3).
3.7 Performtheiodideassay(SeeStep5).
4.Foriodideinfluxassay:
4.1 Aspiratethegrowthmediumfromthecellplate.
4.2 Add100µL/well(96-wellplate),or25µL/well(384-wellplate)ofpre-warmedI-LoadingBuffer(ComponentC)withtestcompounds,andincubatefor5minutes.
4.3 Aspiratetheiodideloadingbuffercompletely,andwashthecellswithHBSS3times.
4.4 Lysethecellsbyadding50µL/well(96-wellplate),or25µL/well(384-wellplate)of1Xcelllysisbuffer(fromStep2.3)
4.5 Performtheiodideassay(SeeStep5).
5.Runiodideassay:
5.1 Add50µL/well(96-wellplate),or25µL/well(384-wellplate)ofIodideBlue™sensor(ComponentA)tothewellsthatcontaindifferentconcentrationsofpotassiumiodide(fromStep3.7orStep4.5).
5.2 Add50µL/well(96-wellplate),or25µL/well(384-wellplate)of1Xiodidesensorenhancersolution(fromStep2.2)intothemixture(Step5.1).
Note:Forsomecelllines,youmightneedtodiluteenhancersolutiondownto0.1X.
5.3 Incubateatroomtemperaturefor10sec-10min.
Note1:Eachcelllineshouldbeevaluatedonanindividualbasistodeterminetheoptimalincubationtime.
Note2:Thebluecolormaychangetoyellowwithinsecondstominutesduetothepresenceofahighconcentrationofiodide.
5.4 Monitorabsorbanceat630,380,or405nm.
References&Citations | ![]() PrinterFriendlyVersion |
1. BregestovskiP,WaseemT,MukhtarovM.(2009)Geneticallyencodedopticalsensorsformonitoringofintracellularchlorideandchloride-selectivechannelactivity.FrontMolNeurosci,2,15.
2. CaputoA,HinzpeterA,CaciE,PedemonteN,ArousN,DiDucaM,Zegarra-MoranO,FanenP,GaliettaLJ.(2009)Mutation-specificpotencyandefficacyofcysticfibrosistransmembraneconductanceregulatorchloridechannelpotentiators.JPharmacolExpTher,330,783.
3. CateniF,ZacchignaM,PedemonteN,GaliettaLJ,MazzeiMT,FossaP,GiampieriM,MazzeiM.(2009)Synthesisof4-thiophen-2"-yl-1,4-dihydropyridinesaspotentiatorsoftheCFTRchloridechannel.BioorgMedChem,17,7894.
4. ChalothornD,ZhangH,SmithJE,EdwardsJC,FaberJE.(2009)Chlorideintracellularchannel-4isadeterminantofnativecollateralformationinskeletalmuscleandbrain.CircRes,105,89.
5. GoodchildSC,HowellMW,CordinaNM,LittlerDR,BreitSN,CurmiPM,BrownLJ.(2009)OxidationpromotesinsertionoftheCLIC1chlorideintracellularchannelintothemembrane.EurBiophysJ,39,129.
6. LiY,O"NeillC,DayML.(2009)Activationofachloridechannelbyatrophicligandisrequiredfordevelopmentofthemousepreimplantationembryoinvitro.BiolReprod,81,759.
7. MaH,JoYJ,MaY,HongJT,KwonBM,OhKW.(2009)ObovatolisolatedfromMagnoliaobovataenhancespentobarbital-inducedsleepingtime:PossIBLeinvolvementofGABAAreceptors/chloridechannelactivation.Phytomedicine,16,308.
8. McCaveraS,RogersAT,YatesDM,WoodsDJ,WolstenholmeAJ.(2009)Anivermectin-sensitiveglutamate-gatedchloridechannelfromtheparasiticnematodeHaemonchuscontortus.MolPharmacol,75,1347.
9. PiernoS,CamerinoGM,CipponeV,RollandJF,DesaphyJF,DeLucaA,LiantonioA,BiancoG,KunicJD,GeorgeAL,Jr.,ConteCamerinoD.(2009)StatinsandfenofibrateaffectskeletalmusclechlorideconductanceinratsbydifferentlyimpairingClC-1channelregulationandexpression.BrJPharmacol,156,1206.
10. PirriJK,McPhersonAD,DonnellyJL,FrancisMM,AlkemaMJ.(2009)Atyramine-gatedchloridechannelcoordinatesdistinctmotorprogramsofaCaenorhaBDitiselegansescaperesponse.Neuron,62,526.
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