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ID:28545158
大小:10.05 MB
页数:50页
时间:2018-12-11
《大鼠脑缺血—再灌注损伤后trka、bcl-2表达及二苯乙烯苷干预》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、硕士学位论文中文摘要2、模型组与TSG两种剂量组再灌注24h的HE染色均显示出典型的坏死灶和神经丢失。3、正常组与假手术组检测到少量凋亡细胞;模型组与TSG组再灌注6h后凋亡细胞开始增多,与正常组及假手术组比较差异显著,24h达高峰,48h、7d仍有表达。与模型组对比,除7d外TSG组减少再灌注其余时间点的细胞凋亡,TSG两种剂量组间无明显差异。4、正常组与假手术组各时间点未检测到Tr以、Bcl一2基因/蛋白的表达。模型组与TSG组肠kA、Bcl一2基因和蛋白的表达变化基本一致,再灌注6h后出现阳性表达,24h达到高峰,48h表达明显下降,7天少量表达。对比模型组,除7d
2、外TSG治疗组在其余时间点肠kA、Bd一2基因/蛋白的表达明显上调,两个TSG剂量组间无明显差异。结论1、大鼠脑缺血一再灌注损伤后,可能增强肠kA旧cl一2通路的活性。2、首乌活性成分TSG的脑保护作用可能通过上调肠沁叼Bcl一2通路的活性,从而降低细胞凋亡、脑组织损伤、改善神经功能缺损有关。3、TSG两组剂量对脑保护作用差异不明显,可能与剂量差异太小有关。关键词脑缺血,二苯乙烯营,TrkA,Bd一2硕士学位论文英文摘要AbstractBaekgroundandobjeetiveManysignaltransductionPathwaysmodulatecellsurvi
3、valandProliferationfollowingisehemiabraindamage.NervegrowthfactorreeePtorA(TrkA)broadlyParticiPatesinregulatingcellProliferation,differentiation,aPoPtosisandotherinflammatoryProeess.ItPlaysanimPortaniroleineerebralischemia/rePerfusioninjury.Bel一2,downstreameffeetorofTrkA,15thefirstlyfound
4、anti一apoPtoticProteinofBel一2family.Bel一2triggeredbyactivatedTrkAbyseveralways15involvedinPreventingtheaPoPtosisPathway.PreviousstudiessuggestedTrh勺Bcl一2couldPreventeellapoPtosisandPromotenervesurviVal·However,thereisn’tstudyaboutimPortantroleofTrh勺旧el一2Pathwayduringcerebralischemia.Presen
5、tly,itwasrePortedthatChinesemedieinePolygonummultiflorumthunbanditsactivePharmaeeuticalingredientstetrahydroxystilbeneglucoside(TSG)haveProteetiveeffectsoneerebralisehemia.However,themechanismandDose一effeetrelationshiP15notfullyunderstood.Inthisstudy,weobservedthethemRNAand/orProteinexPre
6、ssionofTrkAandBel一2andtheeffectofTSG.Furthermore,theimPairmentofbraintissueandaPoptotieeellsweredctectedtoinvestigatethemeehanismofneuroProteetiveanddoseeffectofTSG.TheresultsmayProvidenewdrugdeveloPmentandtherapeuticstrategyforcerebralischemia.MethodsThehealthymalesPrague一dawleyratsweigh
7、ting250一3509wererandomlydividedintofivegrouPs:normalcontrolgrouP(n=6),shamoPerationgrouP(n=6),cerebralischemia/rePerfusion(I/R)grouP(n=48),lowdose(609/kg/d,n=48)andhighdoseTSGtreatmentgrouP(1209/kg/d,n=48).After6d即5intragastric(19)administrationofTSG111‘硕士学位论文英文摘要(t
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