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1、臨床肺科雜志2015年5月第20卷第5期901沙利度胺對肺泡上皮細(xì)胞上皮一間質(zhì)轉(zhuǎn)分化的作用陳海華周賢龍楊炯【摘要】目的探討沙利度胺對A549上皮一問質(zhì)轉(zhuǎn)分化的作用,闡明其抗肺纖維化的機(jī)理。方法A549細(xì)胞分為3組,A:對照組;B:TGF-B1+DMSO組;C:TGF—Bl+沙利度胺組。通過免疫印跡法檢測A549細(xì)胞磷酸化p38MAPK和JNK的蛋白,以及間質(zhì)表型蛋白和上皮表型蛋白的表達(dá);實(shí)時(shí)熒光定量PCR方法檢測A549細(xì)胞p38MAPK和JNKmRNA的表達(dá)。結(jié)果沙利度胺顯著抑制(P<0.05)TGF一131誘導(dǎo)的A54
2、9細(xì)胞間質(zhì)表型蛋白表達(dá)增加,可阻止(P<0.05)A549細(xì)胞上皮表型蛋白表達(dá)的減少,顯著減少活性MAPK蛋白及mRNA的表達(dá)(P<0.05)。結(jié)論沙利度胺可能通過p38MAPK和JNK信號通道,從而抑制肺泡上皮細(xì)胞的上皮.間質(zhì)轉(zhuǎn)分化過程而發(fā)揮抗纖維化作用。【關(guān)鍵詞】沙利度胺;肺泡上皮細(xì)胞;上皮一間質(zhì)轉(zhuǎn)分化Efectofthalidomideonepithelial—mesenchymaltransitionofalveolarepithelialcellsCHENHai—hua,ZHOUXian-long,YANGJio
3、ngEmergencyDepartment,ZhongnanHospitalofWuhanUniveni@,Wuhan,Hubei430071,China【Abstract】ObjectiveToexploretheeffectofth~idomideonthep38MAPKandJNKexpressionduringEMTandthepossiblemechanismofidiopathicpulmonaryfibrosis(IPF),inordertofindanewtreatmenttargetofIPF.Metho
4、dsA549cellswererandomlydividedintothreegroups:thecontrolgroup,thegroupB(TGF-B1+DM—so),andthegroupC(TGF-B1+thalidomide)(101~g/m1).Cellsandmediawerecollectedforphospho—JNKandphospho-p38MAPK.ProteinexpressionwasdetectedbyWestern—blot,andp38MAPKandJNKmRNAweredetec—ted
5、byquantitativereal—timeRT-PCR.ResultsThalidomidecouldsignificantlymitigatetheinhibitionoftheexpres—sionofAECmarkers.Inaddition,thalidomidealsoinducedtheexpressionofmesenchymalmarkers.Furthermore,thephosphorylationandmRNAofp38MAPKandJNKweresignificantlylowerinthegr
6、oupC(TGF-81+thalido—mide)thanthatinthegroupB(TGF-81+DMSO)(P<0.05).ConclusionThalidomidecouldinhibittheEMTofA549cellsviainterferingtheactivationofMAPKs.【Keywords】thalidomide;zlveolarepithelialcells;epithelial-mesenchymaltransition特發(fā)性肺纖維化(IPF)一度認(rèn)為是一種慢性炎化抑制作用。Choe報(bào)道沙
7、利度胺可抑制TGF一131癥疾病,但目前認(rèn)為是激活的肺泡上皮細(xì)胞異常修誘導(dǎo)的肺成纖維化細(xì)胞向成肌纖維細(xì)胞的EMT,有復(fù)的結(jié)果,肺泡上皮細(xì)胞通過上皮一間質(zhì)轉(zhuǎn)化(Epi-報(bào)道沙利度胺可抑制IL一1誘導(dǎo)的結(jié)腸腺癌細(xì)胞p38thelialtomesenchymaltransition,EMT)在肺纖維化MAPK的活性。據(jù)此我們推想沙利度胺可能通過影的發(fā)病中起重要作用¨,在這過程中p38MAPK和響MAPK通道,抑制TGF一131誘導(dǎo)的肺泡上皮細(xì)胞JNK信號通道發(fā)揮重要作用J。EMT而實(shí)現(xiàn)抗肺纖維化作用。本研究通過體外給沙利度胺(又
8、名反應(yīng)停)曾作為鎮(zhèn)靜劑治療妊予沙利度胺,觀察其對TGF一131誘導(dǎo)的肺泡上皮細(xì)娠晨吐,由于導(dǎo)致“海豹胎”的出生而撤出市場。近胞EMT的影響,及此過程中p38MAPK和JNK信號來發(fā)現(xiàn)沙利度胺具有免疫調(diào)節(jié)、抗炎癥反應(yīng)、抗血管通路的變化,從而進(jìn)一步闡明沙利度胺的作用機(jī)理,生成作用,2006年美國FDA批準(zhǔn)與