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时间:2019-03-05
《cpb诱发犬急性肺损伤时肺组织转化生长因子β1 mrna表达的变化》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、354皇醉杂20—10—~3箜30箍3期ChinJAnesthesiol,March2010,Vo1.30,No.3·重症医学·CPB诱发犬急性肺损伤时肺组织转化生长因子』3mRNA表达的变化屈献锋李欠玉杨小平王筱斐周海燕【摘要】目的观察CPB诱发犬急性肺损伤时肺组织转化生长因子p】(TGF.)mRNA表达的变化。方法成年健康杂种犬36只,体重l5~16,随机分为2组(n:18):对照组(C组)和CPB组。CPB组制备CPB诱发急性肺损伤模型,C组除不进行CPB外,其余操作同CPB组。分别于CPB前(T0)、CPB停机后30min(T.)、60
2、rain(T2)时各处死6只犬,取肺组织,光镜下观察肺组织病理学结果,计算肺通透性指数(PPI),测定肺组织TGF.口。mRNA表达和MDA含量。结果c组肺组织结构清晰,未见炎性细胞浸润,肺泡壁光滑、完整,肺泡腔及间质无出血和渗出;CPB组肺泡腔内可见水肿液和中性粒细胞浸润,并可见大量的红细胞,肺泡隔增宽,局灶性肺不张。与c组比较,CPB组TGF.mRNA表达上调,MDA含量和PPI升高(P<0.05或0.O1)。CPB组TGF-~mRNA表达水平与MDA含量和PPI呈正相关(MDA:r=0.867,P<0.01;PPI:r:0.821,P<0
3、.O1)。结论犬CPB后肺组织TGF.8lmRNA表达上调,可能是CPB诱发急性肺损伤发生发展的重要因素之一。【关键词】转化生长因子8;心肺转流术;呼吸窘迫综合征,成人Changesintransforminggrowthfactor,beta1mRNAexpressioninthelunginadogmodelofcardiopulmonarybypass-inducedacutelunginjuryQUXian-feng,LIQian-yu,YANGXiao-ping,WANGXiao-fei,ZHOUHai—yan.Departmento
4、fAnesthesiology,Ta~houMunicipalHospital,Ta~hou318000,ZhejiangProvince,ChinaCorrespondingauthor:ZHOUHai—yan,DepartmentofAnesthesiology,SecondAffiliatedHospital,MedicalCollegeofZhejiangUnive~ity,Hangzhou310009,China,Email:zhouhy-~@163.corn【Abstract】ObjectiveToobservethechanges
5、inthetransforminggrowthfactor-beta1(TGF-13~)mRNAexpressioninthelunginadogmodelofcardiopulmonarybypass(CPB)-inducedacutelunginjury.MethodsThirty—sixhealthyadultmongreldogsofbothsexesweighing15—16kgwererandomlyassignedintocontrolgroupandCPBgroup(n:18each).LunginjuIywasproduced
6、byCPBaccordingtothemethoddescribedbyWilliams.Sixanimalswerekilledateachofthefollowingtimepoints:beforeCPB(To)and30and60rainafterterminationofCPB(Tl,T2)ineachgroup.LungspecimenswereobminedformicroscopicexaminationanddeterminationofTGF-13lmRNAexpression(byRT-PCR)andMDAcontent.
7、Thelungswerelavagedandtheproteinconcentrationinthebrancho—alveolarlavagefluid(BALF)wasdeterminedandpulmonarypermeabilityindex(PPI)wascalculated.ResultsMicroscopicexaminationshowedmassiveinflammatorycellinfiltration,alveolarcapiUarydilatation,congestion,widenedalveolarseptum,
8、massiveRBCinthealveolarspaceandfocalatelectasisinthelunginCPBgroup.TheTGF-1
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