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1、生月第7卷第6期ChinJI】gDis(~ectm.icEdition).Deceni~2314.Ⅷ7.No.6·15··論著·地塞米松通過加強(qiáng)自噬和抑制凋亡減輕海水吸人型肺損傷王莉張敏龍金發(fā)光【摘要】目的探討海水吸入型肺損傷中自噬過程,以及地塞米松對其干預(yù)作用。方法40只大鼠完全隨機(jī)分為正常對照組、1、3、6、12h海水處理組,每組8只。采用氣管內(nèi)滴注海水(3ml/kg)的方法制作海水吸入型急性肺損傷大鼠模型,觀察病理變化,檢測肺組織濕干比,westernblot檢測beclin.1的表達(dá)變化。體外實(shí)驗(yàn)A549細(xì)胞分為正常對照組、12h海水組、地塞米松+1
2、2h海水組、3-MA+12h海水組,采用westernblot檢測beclin一1和bax的表達(dá)變化。結(jié)果海水吸入后,大鼠肺部嚴(yán)重?fù)p傷,水腫明顯,beclin一1隨損傷時間延長表達(dá)量增加,在海水處理后12h達(dá)到高峰。體外實(shí)驗(yàn)中海水刺激增加了beclin.1和bax的表達(dá),然而與海水組相比,地塞米松預(yù)處理增加了beclin1的表達(dá),同時使bax的表達(dá)下降。3-MA預(yù)處理則效果相反。結(jié)論自噬參與了海水吸入型肺損傷的修復(fù)過程,地塞米松能夠通過加強(qiáng)自噬并且抑制凋亡減輕肺損傷?!娟P(guān)鍵詞】急性肺損傷;海水;地塞米松;自噬;細(xì)胞凋亡中圖法分類號:R563文獻(xiàn)標(biāo)識碼:ADe
3、xamethasonealleviatesseawateraspiration-inducedacutelunginjurybyenhancingautophagyandinhibitingapoptosisWangLi,ZhangMinlong,JinFaguang(DepartmentofRespiratorydiseases,TangduHospital,F(xiàn)ourthMilitaryMedicalUniversity,Xi~tn710038,China)Correspondingauthor:JinFaguang,Email:jinfag@fmmu.e
4、du.cn【Abstract】ObjectiveToobservetheprocessofautophagyinseawateraspiration—inducedacutelunginjuryandtheinterventioneffectofdexamethasone.Methods40ratswererandomlydividedinto5groups:normalcontrolgroup,1h,3h,6h,and12hseawatergroup.Everygroupcontains8rats.Seawateraspiration·inducedacu
5、telunginjurymodelwasmadebyseawaterinstillation(3ml/kg)intotheairway.Pathologicalchangesandlungswet/dryratiowerecarriedoutaftermodeling.Theexpressionofbeclin一1wasmeasuredbywesternblot.A549cellsweredividedinto4groups:normalcontrolgroup,12hseawatergroup,dexamethasone+12hseawatergroup.
6、3-MA+12hseawatergroup.Theexpressionofbeclin-1andbaxwasmeasuredbywesternblot.ResultsAfterseawaterstimulation,manifestationsoflunginjuryandedemawereobvious.Theexpressionofbeclin一1wasup—regulatedalongwiththeextensionoftimeandreachedthepeakat12hafterseawateraspiration.Incellsexperiment
7、,seawaterstimulationincreasedtheexpressionofbeclin一1andbax.However,pre—treatmentofdexamethasoneincreasedtheexpressionofbeclin一1andattenuatedtheexpressionofbaxcomparedwithseawatergroup.Furthermore,3-MAhadanoppositeeffectwithdexamethasone.ConclusionAutophagyplaysanimportantpartinther
8、epairmenofseawateraspirati