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1、內(nèi)蒙古醫(yī)學(xué)雜志InnerMongoliaMedJ2013年第45卷第9期1031吡格列酮對(duì)心肌肥厚大鼠Ang1I、SOD、NO的影響張海峰,王鋒,孫虹,薛明明(內(nèi)蒙古醫(yī)科大學(xué)生理教研室、基礎(chǔ)醫(yī)學(xué)院,內(nèi)蒙古,呼和浩特,010110)[摘要]目的:探討吡格列酮對(duì)壓力超負(fù)荷心肌肥厚大鼠血漿中AngII、SOD、NO的影響及可能的作用機(jī)制。方法:選用健康雄性SD大鼠4O只,隨機(jī)分為四組:空白對(duì)照組、模型組、毗格列酮組和卡托普利組。通過(guò)不完全結(jié)扎腹主動(dòng)脈引起壓力負(fù)荷增加,造成左心室心肌肥厚的模型。術(shù)前1周給藥,直至術(shù)后6周。處死動(dòng)物,分別測(cè)定尾動(dòng)脈收
2、縮壓(SBP),電子天平稱量左心室重量(Lvw),計(jì)算左心系數(shù)(LVw/BW);用放射性免疫法檢測(cè)血漿中AnglI,比色法測(cè)定血漿中SOD和NO水平。結(jié)果:與空白對(duì)照組相比,模型組SBP、Lvw/Bw和血漿中AngⅡ水平明顯升高(P<0.05),血漿中sOD和NO水平明顯降低(P<0.05);毗格列酮組與模型組相比,血漿中SOD和NO水平明顯升高(P<0.05);AngII水平明顯降低(P<0.05)。結(jié)論:呲格列酮可以通過(guò)降低血漿Ang1/水平,升高SOD和NO水平來(lái)抑制壓力超負(fù)荷增加引起的心肌肥厚。[關(guān)鍵詞]呲格列酮;心肌肥厚;AngI
3、I;SOD;NO[中圖分類號(hào)]R542.2[文獻(xiàn)標(biāo)識(shí)碼]A[論文編號(hào)]1004—0951(2013)091031~03EffectsofPioglitazoneonAng1ISOD、NOinCardiacHypertrophicRatsZHANGHal—feng,WANGFeng(InnerMongoliaMedicalUniversityPhysicalTeachingandResearchsection,Huhhot,010110CHina)[Abstract]Objective:Toinvestigatethechangesofang
4、iotensinII(Ang1),nitricoxide(NO)andsuper—oxidedismutase(SOD)levelandthepossiblemechanism.Methods:40SDratswererandomlydividedintofourgroups:sham—operatedgroup,modelgroup,pioglitazone—treatedgroup,captopril—treatedgroup.Cardiachy—pertrophywasproducedbyabdominalaorticbanding.
5、Pioglitazonewasgivenorally1weekbeforeoperationandcontinuedtill6weeksafteroperation,thentheratswerekilled,partoftheheartwasusedformeasurementsofleftventrieularwallthickness(IVw),leftventrieularmessindex(I、廠w/Bw)andsystolicbloodpressure(SBP)weremeasured,AngIIlevelwasdetermin
6、edinplasmabyradiommunoassay,SODandNOlevelsweremeasuredbycolorimetricmethod.Results:Ascomparedwithsham—operatedgroup,SBP,IVW/BWandAngIIlevelsofmodelgroupinplasmawereincreased(P<0.05),SODandNOlevelsinplasmaweredecreased(P<0.05);Ascomparedwithmodelgroup.SBP,、
7、andAngIIlevelsof
8、pioglitazone—treatedgroupinplasmaweredecreased(P<0.05),SODandNOlevelsinplasmawereincreased(P<0.05).Conclusions:Thepossiblemech—anismofpioglitazoneiscorrelatedwithinhibitingAngIIlevelandpromotingSODandNOlevelsinplasma.[Keywords]Cardiachypertrophy;Ang1I;SOD;NO在各種心血管疾病中基本能觀察到
9、心肌肥厚的清楚。近年來(lái)有證據(jù)表明:心臟局部存在的RAS在出現(xiàn),如高血壓、心肌梗塞、瓣膜性心臟病和肥厚性心肌肥厚的發(fā)生中起重要作用。已知Ang1具有生心肌病等。研究表明,心肌肥厚不