资源描述:
《N乙酰半胱氨酸对兔肝缺血再灌注损伤的保护作用》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、N-乙酰半胱氨酸对兔肝缺血再灌注损伤的保护作用戴大军1蔡俊赢21.江西省德安县中医院麻醉科,江西德安330400;2.江西省南昌大学第二附属医院麻醉科,江西南昌330000【摘要】目的探讨兔肝缺血再灌注损伤的机制及N-乙酰半胱氨酸对兔肝的保护作用。方法选40只实验兔,随机分为肝缺血再灌注组(IR组)和肝缺血再灌注+N-乙酰半胱氨酸组(IR+NAC组),于门静脉阻断前(T0),门静脉开放即刻(T1),开放后2h(T2),开放后5h(T3),开放后7h(T4)时间点记录心率(HR),平均动脉压(MAP),分别测
2、定各组血清丙氨酸氨基转移酶(ALT),天门冬氨酸氨基转移酶(AST),丙二醛(MDA),超氧化物岐化酶(SOD)并检测肝细胞凋亡数。结果与T0比较,两组T1,T2,T3,T4时间点ALT,AST及MDA显著升高,SOD明显降低;与IR组比较,IR+NAC组T1,T2,T3,T4时间点ALT,AST及MDA显著下降,SOD明显升高,且IR+NAC组T3,T4时凋亡细胞数减少。结论NAC对兔肝缺血再灌注损伤有保护作用,可能是由于NAC清除氧自由基,抑制肝细胞凋亡。【关键词】N-乙酰半胱氨酸;肝脏;缺血再灌注损伤
3、;氧自由基ProtectiveeffectofN-acetylcysteineonhepaticischemiareperfusionInjuryofrabbits.DAIDaJun1CAIJunYing21.DepartmentofAnesthesiology,TheTraditionalChineseMedicineHospitalofDe'anCounty,JiangxiProvince330400;2.DepartmentofAnesthesiology,theSecondAffiliatedHos
4、pitalofNanchangUniversity,JiangxiNanchang330000[Abstract]ObjectiveToinvestigatetheprotectionofN-acetylcysteine(NAC)hepaticischemiareperfusion(IR)injuryofrabbits.MethodsFortyrabbitswererandomlydividedintoIRgroupandNACgroup.Heart(HR),meanarterialpressure(MAP
5、),serumlevelofalanineaminotranserase(ALT),serumlevelofaspartateaminotransferase(AST),serumlevelofmalondialdehyde(MDA)andserumlevelofsuperoxidedismutase(SOD)weredeterminedseparatelybeforehepaticischemia(T0),atthetimeofthehepaticvascularwasreleased(T1)andthe
6、timeat2h(T2),5h(T3),7h(T4)afterhepaticvascularwasreleased.Theapoptosisoflivercellwasmeasuredalso.ResultsComparedtoT0inbothgroups,theserumlevelsofALT,ASTandMDAatT1,T2,T3andT4increasedbuttheSODleveldecreasedmarkedly.ComparedwithIRgroup,theserumlevelsofALT,AS
7、TandMDAatT1,T2,T3andT4weremarkedlydecreasedwiththedramaticincreaseofSODlevelingroupIR+NAC.TheapoptosisoflivercellatT3andT4decreasedmarkedlyingroupIR+NAC,ascomparedtogroupIR.ConclusionTheseresultssuggestthatNACcanprotecthepaticischemiaandreperfusioninjury.t
8、hepossiblemechanismmaybethatNACcanscavengeoxygenfreeradicalsandinhibitlivercellapoptosis.[Keywords]N-acetylcysteine;Liver;Ischemiareperfusioninjury;oxygenfreeradicals肝缺血再灌注损伤是肝脏外科手术中常见的病理过程,尤其是肝脏移植手术,严重者可导致肝功