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腦蛛網(wǎng)膜下腔出血第1頁(yè),共21頁(yè),2023年,2月20日,星期四OutlineIntroduction;Researchpurposes;Materialandmethod;ResultandDiscussion;Evaluationandoutlook;Conclusion.第2頁(yè),共21頁(yè),2023年,2月20日,星期四ReferencesCahillWJ,CalvertJH,ZHangJH,etal.Mechanismsofearlybraininjuryaftersubarachnoidhemorrhage[J].JCerebBloodFlowMetab,2006,26(11):1341-1353E.Ko?niewska,R.Michaliketal.Mechanismsofvasculardysfunctionaftersubarachnoidhemorrhage[J].J.PhysiologyandPharmacology,2006,57,11,145.160WestermAierT,Jaussa,EriskatJ,etal.Time-courseofcerebralperfusionandtissueoxygenationinthefirst6hafterexperimentalsubarachnoidhemorrhageinrats[J].JCerebBloodFlowMetab,2009,29(4):771-779BenjaminFriedrich,etal.Experimentalsubarachnoidhemorrhagecausesearlyandlong-lastingmicroarterialconstrictionandmicrothrombosis:anin-vivomicroscopystudy.JCerebFlow

Metab.2012,32(3):447-455IshikawaMami;KusakaGen;YamaguchiNoriyuki.Plateletandleukocyteadhesioninthemicrovasculartureatthecerebralsurfaceimmediatelyaftersubarachnoidhemorrhage,J.Neurosurgery,2009,64(3):546-553DanielZ,MuhammadF.etal.Delayedischemiaaftersubarachnoidhemorrhage:resultofvasospasmaloneorabroader[J],J.VascMed200712:243第3頁(yè),共21頁(yè),2023年,2月20日,星期四IntroductionSubarachnoidHemorrhage(SAH):Asubtypeofstrokewithaparticularlyhighmorbidityandmortality.EarlyBrainInjury(EBI):Occurswithin72haftertheinitialbleed;Noeffectivetreatmentisavailable;Mechanismshaverecentlystartedtobeunderstood.第4頁(yè),共21頁(yè),2023年,2月20日,星期四CAHILLWJ,CALVERTJH,ZHANGJH,etal.Mechanismsofearlybraininjuryaftersubarachnoidhemorrhage[J].JCerebBloodFlowMetab,2006,26(11):1341-1353第5頁(yè),共21頁(yè),2023年,2月20日,星期四E.KO?NIEWSKA,R.MICHALIKetal.MECHANISMSOFVASCULARDYSFUNCTIONAFTERSUBARACHNOIDHEMORRHAGE[J]J.PHYSIOLOGYANDPHARMACOLOGY2006,57,Suppl11,145.160第6頁(yè),共21頁(yè),2023年,2月20日,星期四WESTERMAIERT,JAUSSA,ERISKATJ,etal.Time-courseofcerebralperfusionandtissueoxygenationinthefirst6hafterexperimentalsubarachnoidhemorrhageinrats[J].JCerebBloodFlowMetab,2009,29(4):771-779第7頁(yè),共21頁(yè),2023年,2月20日,星期四ResearchpurposesCPPindependentInvestigateinvivoAlterationsonmicrocirculation?Whether/When/Where/What/HowRelationshipwithmicrothrombiEarlyperfusiondeficits

CBFreduction第8頁(yè),共21頁(yè),2023年,2月20日,星期四MaterialandMethod

CWpmodel;Cranialwindow;Intravitalfluorescencemicroscopy.

第9頁(yè),共21頁(yè),2023年,2月20日,星期四MicrovascularConstriction:Numerousconstrictedarterioleswereobserved,incontracttovenules;Distributionofseveritychangedovertime.Result-1BenjaminFriedrich,etal.Experimentalsubarachnoidhemorrhagecausesearlyandlong-lastingmicroarterialconstrictionandmicrothrombosis:anin-vivomicroscopystudy.JCerebFlowMetab.2012,32(3):447-455第10頁(yè),共21頁(yè),2023年,2月20日,星期四Result1MicrovascularConstriction:Numerousconstrictedarterioleswereobserved,incontracttovenules;Distributionofseveritychangedovertime.Thesmallestarteriolesaremostseverelyaffectedbymicrovasospasm.BenjaminFriedrich,etal.Experimentalsubarachnoidhemorrhagecausesearlyandlong-lastingmicroarterialconstrictionandmicrothrombosis:anin-vivomicroscopystudy.JCerebFlowMetab.2012,32(3):447-455第11頁(yè),共21頁(yè),2023年,2月20日,星期四Result-1Microthrombi:Arteriolarconstrictionsoccurfirstandthentriggermicrothrombosis;Theseverityofconstrictionwaspositivelycorrelatedwiththefrequencyofmicro-thrombiBenjaminFriedrich,etal.Experimentalsubarachnoidhemorrhagecausesearlyandlong-lastingmicroarterialconstrictionandmicrothrombosis:anin-vivomicroscopystudy.JCerebFlowMetab.2012,32(3):447-455第12頁(yè),共21頁(yè),2023年,2月20日,星期四SummaryLong-lastinghemodynamicalterationsatthemicrocirculatorylevelmaybeanimportantmechanismforthedevelopmentofearlyposthemorrhagicischemia.第13頁(yè),共21頁(yè),2023年,2月20日,星期四P-selectinandApocyninP-selectin

Platelet-Leukocyte

rollingandadhesionEndothelial–LeukocyteadhesionPlatelet-Endothelialadhesionnon-P-selectin60%40%blockerPlatelet

P-selectinEndothelial

P-selectinLeukocyte

PSGL-1NAD(P)Hoxidase

Apocynin第14頁(yè),共21頁(yè),2023年,2月20日,星期四Result-2Platelet-leukocyte-endothelialcellinteractionswereobservedmainlyinthepostcapillaryvenulesimmediatelyafterSAH.TreatmentwithP-selectin-blockingantibodybeforeSAHreducedrollingandadherentplateletsalmosttobaselinelevels.Treatmentwithapocynin

beforeSAHreducedplateletadhesionbyonehalf.IshikawaMami;KusakaGen;YamaguchiNoriyuki.Plateletandleukocyteadhesioninthemicrovasculartureatthecerebralsurfaceimmediatelyaftersubarachnoidhemorrhage,J.Neurosurgery,2009第15頁(yè),共21頁(yè),2023年,2月20日,星期四DiscussionP-selectin

Platelet-Leukocyte

rollingandadhesionEndothelial–LeukocyteadhesionPlatelet-Endothelialadhesionnon-P-selectin60%40%blockerPlatelet

P-selectin;Endothelial

P-selectinLeukocyte

PSGL-1NAD(P)Hoxidase

ApocyninApocynin第16頁(yè),共21頁(yè),2023年,2月20日,星期四SummaryP-selectinandNAD(P)HoxidaseparticipateintheearlymicrovascularresponsestoSAH.第17頁(yè),共21頁(yè),2023年,2月20日,星期四EvaluationAdvantages:ProvideMorphologicalevidence;Helpverifymechanisms;Invivo;Dynamicchangesatearlytime;Microcirculation;Retainedduramater;Limitations:superficialstructuresonly;decompressioncraniectomy;detailedmolecularmechanisms;第18頁(yè),共21頁(yè),2023年,2月20日,星期四OutlookThedistincteventsoccurinmicro-arteriolesandmicro-venules?whichpathwaysplayadominantrole?Otherpotentialrolesintheinductionofmicrocirculationdeficit?Combinewithmolecularbiologystudy?Secrethiddenbehindthepheno

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