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时间:2020-05-07
《右美托咪啶对大鼠肝缺血再灌注损伤的保护作用-论文.pdf》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、570武警医学2014年6月第25卷第6期MedJChinPAPF,Vo1.25,No.6,June,2014右美托咪啶对大鼠肝缺血再灌注损伤的保护作用张捍平,葛倩,李冬,芮龙杰【摘要】目的探讨右美托咪啶对大鼠急性肝缺血再灌注损伤(ischemiareperfusioninjury,IRI)的保护作用。方法sD大鼠32只,随机分为对照组(s组)、缺血一再灌注组(IR组)、右美托咪啶组(Dex组)、右美托咪啶+育亨宾组(Dex+Yoh组),每组8只。IR组制备大鼠肝缺血再灌注模型。Dex组通过尾静脉以5g/(kg·h)的速度持续泵注右美托咪啶1h,余同IR组。Dex
2、+Yoh组静脉输注右美托咪啶前10min,静脉注射育亨宾1mg/kg,其余同Dex组。分别测定血清AST、ALT活性,肿瘤坏死因子.仪(TNF—oL)、自细胞介素一6(IL-6)浓度,肝组织超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量,光镜观察肝组织的病理学变化。结果与S组比较,IR组血AST、ALT、TNF一0【、IL-6,肝组织MDA水平显著增加,SOD水平下降(P<0.05);与IR组比较,Dex组血AST、ALT、TNF—et、IL-6下降(P<0.05),肝组织SOD水平升高,MDA水平下降(P<0.05),Dex+Yoh组无显著变化(P>0.05
3、);形态学上,病理损伤程度与生化指标相符合。结论右美托咪啶能减轻肝缺血再灌注损伤,其机制可能是激活d,肾上腺素受体,抑制氧自由基反应和炎性因子的释放。【关键词】右美托咪啶;肝脏;缺血再灌注损伤【中国图书分类号】R691ProtectiveefectsofdexmedetomidineonliverischemiareperfusioninjuryinratsZHANGHanping,GEQian,LIDong,andNALongjie.DepartmentofAnesthesiology,JiangsuProvincialCorpsHospital,Chi—nes
4、ePeople~ArmedPoliceForces,Yangzhou225003,China【Abstract】ObjectiveTodeterminetheeffectsofdexmedetomidineonliverischemiareperfusioninjury(IRI)inrats.Meth-ods32SDratswereallocatedrandomlyinto4groups(n:8pergroup):Shamgroup(S),ischemiareperfusiongroup(IR),DexgroupandDex+Yohgroup.IRgroup:th
5、eratsreceivedcontinuousintravenousinfusionofnormalsaline,andliverIR1wasinduced.Dexgroup:intravenousdexmedetomidinewasinfusedcontinuouslyat5tLg/(kg·h)for1hbeforetheliverischemia.Dex+YohgrouP:yohimbinehydrochloride(1mg/kg)wasadministeredintravenously10minbeforedexmedetomidine.SerumAST,A
6、LT,TNF—oL,IL-6,liversuperoxidedismutase(SOD)andmalonylaldehyde(MDA)weredetected.Liverlesionswereexaminedhistopathologi—cally.ResultsComparedwithgroupS,theserumAST,ALT,TNF一andIL-6,liverMDAincreasedwhileSODdecreasedsignifi—cantlyingroupIR(P<0.05).ComparedwithgroupIR,theserumAST,ALT,TNF一
7、andIL-6,liverMDAdeCreasedwhileSODincreasedsignificantlyingroupDex(P<0.05).TherewasnosignificantdifferencebetweengroupIRandDex+Yoh.Thepathologi—calinjuryaccordedwithbiochemistrydata.ConclusionsDexmedetomidineattenuatesliverIRI,partlythroughtheinhibitionofoxy-genderivedfreeradicalsandde
8、press
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