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ID:33132855
大小:4.87 MB
页数:46页
时间:2019-02-21
《右美托咪定通过抑制tlr4表达及nf-κb活化减轻脓毒症大鼠肺组织炎症反应》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、徐州医学院硕士学位论文右美托咪定通过抑制TLR4表达及NF--κB活化减轻脓毒症大鼠肺组织炎症反应姓名:刘迎春申请学位级别:硕士专业:麻醉学指导教师:武玉清2012-04徐州医学院硕士学位论文右美托咪定抑制脓毒症大鼠肺组织炎症反应的作用及相关机制研究中文摘要目的观察右美托咪定对脓毒症大鼠肺组织炎症反应的影响及相关机制。方法健康成年雄性sD大鼠,随机分为五组:Sham组(假手术组);c】LP组;s组(Dex小剂量+cLP组);M组(Dex中剂量+CLP组);以及L组(Dlex大剂量+cLP组)。应用盲肠结扎穿刺
2、法(CLP)制造脓毒症模型。观察造模后乜4小时内各组动物的死亡率。应用HE染色观察肺组织炎症的病理学变化;应用酶联免疫技术(ELISA)检测血浆中炎症细胞因子(IL-6、TNF.a)的浓度水平变化应用免疫组织化学技术检测肺组织中NF.1cB的活化;应用Westernblot技术检测中NF.r.B,TLR4的表达。结果与假手术组相比,CLP组大鼠的24小时死亡率显著升高,而右美托眯定中剂量和大剂量显著降低了CLP大鼠的死亡率。假手术组(Sham),模型组(C叫)及右美托咪定小、中、大剂量组大鼠24小时死亡率分别
3、为O%、87.5%、75%、137.5%和25%。HE染色发现,模型组(CLP)肺组织有明显的炎症反应,肺泡结构破坏,炎性细胞浸润;右美托咪定中、大剂量减轻了肺组织的炎症改变,并且显著降低了CLP大鼠血浆中炎症细胞因子(IL一6、TNF—a)的水平,(P4、美托咪定能够通过抑制TLR4表达及NF.KB活化降低脓毒症大鼠蒯组织的炎症反应程度和死亡率。关键词右美托咪定;脓毒症;TLR4;NF.KB2————————————一1疏歼....叫1徐州医学院硕士学位论文InhibitoryeffectsofdexmedetomidineoninflammatoryreactioninlungtissuesofsepticratsandrelevantmechanismsAbstractObjectiveThisstudywasdesignedtoinvestigateth5、eeffectsofdexmedetomidineonlevelsofinflammatorycytokines,nuclearfactor-kappaB(NF—r,B)andToll-likereceptors(TLRs)inratlungduringpolymicrobialsepsis,inducedbycecalligationandpuncture(CLP).MethodsRatswererandomlydividedintofivegroups:sham—operationplusnormalsa6、line(NS,5mt/kg),CLPplusNS(5ml/kg),CLPplussmall—dose(5ug/kg)dexmedetomidine(groups),CLPplusmedium·dose(10ug/kg)dexmedetomidine(groupM),CLPpluslarge—dose(20ug&g,)dexmedetomidine(groupL).Sepsiswasinducedbycecalligationandpuncture(CLP).Aftertheinductionofsepsis7、orsham.operationtheplasmacytokineconcentrationsweremeasuredbyenzyme-linkedimmunosorbentassay(ELISA)duringtheobservation.ActivityofNF—KBinratintestinewasdeterminedbyimmunohistochemistryandwesternblotting.AndexpressionofToll·likereceptor4wasassessedbywesternb8、lotting.ResultsThemortalityratefortheCLPgroupwassignificantlymorethanthatfortheshamgroup.ThemortalityratesforgroupLandMweresignificantlyreducedbydexmedetomidine.Themortalityratesat24haftercecalligation
4、美托咪定能够通过抑制TLR4表达及NF.KB活化降低脓毒症大鼠蒯组织的炎症反应程度和死亡率。关键词右美托咪定;脓毒症;TLR4;NF.KB2————————————一1疏歼....叫1徐州医学院硕士学位论文InhibitoryeffectsofdexmedetomidineoninflammatoryreactioninlungtissuesofsepticratsandrelevantmechanismsAbstractObjectiveThisstudywasdesignedtoinvestigateth
5、eeffectsofdexmedetomidineonlevelsofinflammatorycytokines,nuclearfactor-kappaB(NF—r,B)andToll-likereceptors(TLRs)inratlungduringpolymicrobialsepsis,inducedbycecalligationandpuncture(CLP).MethodsRatswererandomlydividedintofivegroups:sham—operationplusnormalsa
6、line(NS,5mt/kg),CLPplusNS(5ml/kg),CLPplussmall—dose(5ug/kg)dexmedetomidine(groups),CLPplusmedium·dose(10ug/kg)dexmedetomidine(groupM),CLPpluslarge—dose(20ug&g,)dexmedetomidine(groupL).Sepsiswasinducedbycecalligationandpuncture(CLP).Aftertheinductionofsepsis
7、orsham.operationtheplasmacytokineconcentrationsweremeasuredbyenzyme-linkedimmunosorbentassay(ELISA)duringtheobservation.ActivityofNF—KBinratintestinewasdeterminedbyimmunohistochemistryandwesternblotting.AndexpressionofToll·likereceptor4wasassessedbywesternb
8、lotting.ResultsThemortalityratefortheCLPgroupwassignificantlymorethanthatfortheshamgroup.ThemortalityratesforgroupLandMweresignificantlyreducedbydexmedetomidine.Themortalityratesat24haftercecalligation
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