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1、西南國防醫(yī)藥2014年1月第24卷第1期·23·TOLL樣受體4對脂多糖致急性肺損傷大鼠炎癥因子的影響黃繼義,劉才文,林建東,葉先龍,洪朝基,周榮[摘要]目的探討TOLL樣受體4(TLR4)表達對脂多糖誘導急性肺損傷(ALI)大鼠體內(nèi)炎癥因子的影響,明確阻斷TLR4表達對急性肺損傷的保護作用。方法45只雄性Wistar大鼠隨機分為:正常對照組、Au組和干預組,每組15只。ALI組和干預組采用靜脈注射脂多糖(LPS)方法構(gòu)建急性肺損傷模型,對照組注射等量的生理鹽水。各組動物再按照觀察時間點平均分為造模后6、12和24h各3個亞組。測定各組肺組織TLR4mRNA表達以
2、及支氣管肺泡灌洗液中炎癥因子濃度,觀察各組大鼠肺組織的病理變化。結(jié)果LPS可以導致肺泡腔內(nèi)TNF一僅、IL一1和IL-6濃度增加,阻斷TLR4受體會抑制炎癥因子釋放;ALI組的肺損傷評分高于干預組和正常對照組(3.3±1.1vs.1.9±1.0vs.1.2±0.9)。結(jié)論阻斷TLR4表達能抑制脂多糖誘導ALI大鼠體內(nèi)炎癥因子分泌,減輕肺組織病理損害,能達到治療ALI的作用。[關(guān)鍵詞]急性肺損傷;Toll樣受體4;炎癥因子中圖分類號R614文獻標識碼A文章編號1004-0188(2014)叭-0023-04doi:10.3969/j.issn.1004-0188.2
3、014.01.009EfectsofTLR4oninflammatoryfactorinratswithacutelunginjuryinducedbyfipopolysaccharideHuangJiyi,LiuCaiwen,LinJiandong2YeXianlong,HongChaoji,ZhouRong41.DepartmentofInternalMedicine,Tongmin,Hospital,theFirstAffiliatedHospitalofXiamenUniversity,Xiamen,F(xiàn)ujian,361000,China;2.Intens
4、iveCareUnit,theFirstAfiliatedHospitalofFujianMedicalUniversity,F(xiàn)uzhou,F(xiàn)ujian,350000,China;3.DepartmentofInternalMedicine,XiamenMedicalResearchInstitute,Xiamen,F(xiàn)ujian,361000,China;4.DepartmentofEmergency,theFirstAfiliatedHospitalofXiamenUniversity,Xiamen,361000,China[Abstract]0bjective
5、TodiscusstheeffectsofToll—likereceptor(TLR)4expressionontheinflammatoryfactorsinratswithacutelunginjuryinducedbylipopolysaccharide,andtoexploretheprotectioneffectofblockingtheTLR4expressiononacutelunginjury.MethodsFortyfivemaleWistarratswererandomlydividedintonormalcontrolgroup,ALIgro
6、up,andinterventiongroupwith15onesineachgroup.InALIandinterventiongroups,themodelsofacutelunginjurywereestablishedbythemethodofintravenousinjectionwithlipopolysaccharide(LPS).Thecontrolgroupreceivedtheinjectionwiththesamevolumeofnormalsaline.Alltheanimalsweredividedintosubgroupsof6,12,
7、and24haccordingtotheobservationtimingofthemodeling.DetectionwasmadeintheTLR4mRNAexpressioninthelungtissuesofthoseanimalsandtheconcentrationoftheinflammatory~etominthebronchoalveolarlavagefluid.Thepathologicalchangesintheratslungtissueswereobserved.ResultsLPScouldleadtotheincreaseofTNF
8、-a,IL