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REGULATION OF ANTI-SRBC ANTIBODY PRODUCTION BY OPIOIDS AND THEIR MECHANISMS

摘要撰写人 : TsingHua
浏览次数 : 25  词语: 300   出版日期: 九月 30, 1995
REGULATIONOFANTI-SRBCANTIBODYPRODUCTIONBYOPI OIDSANDTHEIRMECHANISMSWangHuiqin(王慧琴),LinJi ayou(林嘉友)andLiuJingsheng(刘景生)(Dept.ofPharma cology,InstituteofBasicMedicalSciences,CAMS &PUMC.Beijing100005)Abstract:Thisstudyfocus edontheinfluencesofopioidsonthegenerationof antibodyagainstsheeperythrocyteinvitro,Itwa sfoundthatmorphine.a-CAO,DADLE,MENKwereable toinhibitthecapacityofmurinespleencellstoge nerateantibodyandleukotrieneC4andconversely .dynorphinwasabletostimulatethecapacityofmu rinespleencellstogenerateantibodyandleukotr ieneC4.Morphine,a-CAO,MENK,DADLE,dynorphind ecreasedintracellularcAMPlevel,increased[Ca (2+)]iandcalmodulinactivity.Theeffectswerec ompletelyblockedbynaloxone,thespecificopioi dantagonist.Ourresultsshowedthatopioidsregu latetheproductionofantibodyinmurinespleence lls,andalterintracellularcAMP,[Ca(2+)]icalm odulinactivity.andleukotrieneC4productionby wayofbindingtodifferentreceptortypes.Keywor ds:opioids,antibody,[Ca ̄(2+)]iINTRODUCTIONO pioidshavebeenfoundtoexertprofoundeffectson immunesystem.Wybran,etal.in1979wasthefirstt oreportthepresenceofopioidreceptorsonlympho cytes.Itwassuggestedthatopioidpeptides,asne uro-transmittersorneuro-modulators,wereinvo lvedinthemodulationoftheimmuneresponse.Rece ntly,ithasbeenshownthatopioidsaffectvarious compartmentsoftheimmuneresponse.Theycouldbe immunoenhancing,immunosuppressiveorwithouta nyeffect.Theeffectscanbealmostcompletelyant agonizedbynaloxone.Theimmunomodulatoryeffec tofopioidsappearstobemediatedthroughspecifi copioidreceptorsonlymphocytes,butlittleatte ntionhasbeengiventothesecondmessengersystem s(calcium,cyclicnucleotids,phosphotidylinos itol,etc.)activatedinthetargetcells.Inthepr esentstudy,wehavefoundthatmorphine,a-CAO,DA DLE,MENKanddynorphinmodulatetheproductionof antibody,andthiseffectisrelatedtocytosolicc AMP,[Ca(2+)]iandLTC4.MATERIALSANDMETHODSMic e.MaleandfemaleBalb/cmice(6-8weeksold)wereo btainedfromtheInstituteofGeneticSciences.Ch ineseAcademyofSciences.Guineapigandsheepred bloodcells(SRBC).wereobtainedfromExperiment alAnimalCenter,CAMS&PUMC.Reagents:Morphines ulfate,MENK,DADLE.Fura2/AM(SigmaChemicalCom pany),a-CAO[1](ShanghaiMedicalCollege),Dyno rphin(1-13)(Peninsula),NalosoneHydrochlorid e(CAMS).RPMI-1640andAgarose,(Gibcocompany), POPOP(MerckcomReceivedforpublicationSep.24, 1994.Correspondingauthor.pany).LCM(Shanghai RongShengBio-soleventFactory).cAMPkit.CaMki t.LTC4kitwereobtainedfromourlaboratory.Stat istics.Alldataareshowninmean±SE.PairedStude nttestwasusedforcomparisonofthedifferencebe foreandaftertreatmentinthesamegroup.Immuniz ationprocedure:SRBCswerewashedthreetimesinH ank′sbufferandcounted.TheywerethengiventoBa lb/cmicebyintraperitonealinjectionatabout5× 109in1ml.Cellpreparation.After4daysofimmuni zation,themicewerekilledbytractionoftheneck ,andspleenwasasepticallyremoved.Cellsuspens ionwasobtainedbygentlypressingthespleenagai nstastainlesssteelseiveofmeshinapetridishco ntaining5.0mlHank′sbuffer.Thesuspensionwast ransferredtoa10mlcentrifugationtubeandallow edtostandfor5minfordebrisandlargecellclumps tosettle.thendecantedtoanother10mltubeandce ntrifugatedat1000rpmfor10min.Thesupernatant wasdiscarded.thecellsinthesedimentreconstit utedin1mlbuffer,countedandthenadjustedto1.6 ×107/ml.Theviabilityofthecellswere>95%astes tedbytrypsanblueexclusion.Plaque-formingcel l(PFC)assay.Thesecondaryinvitroantibodyresp onsewasexaminedfollowingthemethodsofMishell andDutton(2,3).Spleencellswerecounted,centr ifugedandresuspendedin1.6×107/mlofRPMI1640m ediacontaining100u/mlpenicillin,100μg/mlstr eptomycin,200mmol/I,L-glutamineand15%fetalb ovineserum.Theywerethendispensedintoflat-bo tton24well.tissuecultureplates.SRBC,afterwa shingthreetimesinRPMIwereaddedat3×106perwel l.Differentconcentrationsofmorphine,a-CAO,M ENK,DADLEanddynorphinwereaddedtothecultures atafinalconcentrationof10(-12)-10(-6)mol/L. Atthesametime,sterilizedsalinewasaddedtothe controlwell.Thenspleencellswereincubatedat3 7℃for48hoursin5%CO2atmosphere.After48hoursofincubation,thespleencellswereharvested,washedinHank′sbuffer,andthenumberofdirectPFCwasquantitatedusinghemolyticplaqueasSay.Assay

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