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《膽管上皮細(xì)胞上皮間質(zhì)轉(zhuǎn)變以與bmp7的逆轉(zhuǎn)效應(yīng)》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、軍醫(yī)進(jìn)修學(xué)院碩十學(xué)位論文膽管上皮細(xì)胞上皮一間質(zhì)轉(zhuǎn)變以及BMP-7的逆轉(zhuǎn)效應(yīng)中文摘要目的:膽管上皮細(xì)胞(BiliaryEpithelialCells,BECs)是一族高氧耗、高代謝、低缺氧耐受、易受自由基損害的細(xì)胞群體。缺血性膽管病時(shí)膽管上皮損傷后的共同特征是上皮化的功能單位發(fā)牛改建和纖維化,伴有上皮細(xì)胞缺失、基底膜損害和間質(zhì)纖維化。但膽管上皮細(xì)胞同膽管型纖維化之間的關(guān)系尚不清楚。本研究通過(guò)體外原代培養(yǎng)大鼠及人膽管上皮細(xì)胞(BECs),探討經(jīng)轉(zhuǎn)化生長(zhǎng)因子.p(TGF.p)誘導(dǎo)后,BECs能否出現(xiàn)上皮.間質(zhì)表型轉(zhuǎn)變(EMT),及
2、其相關(guān)蛋白及分子標(biāo)志的表達(dá)變化;并探討骨形態(tài)形成蛋白.7(BMP.7)是否可以逆轉(zhuǎn)膽管上皮細(xì)胞的EMT,從而為缺血性膽管病的發(fā)生機(jī)理及治療提供實(shí)驗(yàn)依據(jù)。方法:分離大鼠及人肝膽管上皮細(xì)胞并進(jìn)行原代培養(yǎng)。對(duì)2種細(xì)胞分別設(shè)立未處理空白對(duì)照組、誘導(dǎo)EMT組、BMP.7對(duì)EMT逆轉(zhuǎn)效應(yīng)組。通過(guò)免疫組化、免疫熒光檢測(cè)其E.cadherin、CK.19、S100A4、13-catenin、Fibronectin等標(biāo)志蛋白的表達(dá)變化。結(jié)果:(1)進(jìn)行了體外分離大鼠及人膽管上皮細(xì)胞并進(jìn)行原代培養(yǎng),細(xì)胞純度及存活率較高;(2)體外培養(yǎng)的膽管上皮
3、細(xì)胞窒:TGF.p誘導(dǎo)后,其上皮標(biāo)志E.cadherin、13-catenin、CK.19表達(dá)降低,間質(zhì)細(xì)胞標(biāo)志Vimentin、S100A4及Fibronectin的表達(dá)升高,出現(xiàn)EMT的特征;(3)BMP.7可在一定程度上逆轉(zhuǎn)EMT,表現(xiàn)為E.cadherin、13-catenin及CK.19表達(dá)升高,而Vimentin、S100A4及Fibronectin的表達(dá)降低。結(jié)論:體外培養(yǎng)的BECs可以在TGF.B誘導(dǎo)下發(fā)生EMT改變,提示BECs可通過(guò)上皮.間質(zhì)轉(zhuǎn)變成肌纖維母細(xì)胞,可能在膽管上皮纖維性改建、導(dǎo)致膽管狹窄和纖維
4、化中發(fā)揮作用。而且首次證明BMP.7可以逆轉(zhuǎn)膽管上皮細(xì)胞EMT,顯示BMP.7可以對(duì)缺血性膽管病潛在治療價(jià)值。關(guān)鍵詞:膽管上皮細(xì)胞上皮.間質(zhì)轉(zhuǎn)變?nèi)毖阅懝懿〉?頁(yè)軍醫(yī)進(jìn)修學(xué)院碩士學(xué)位論文StudyofEpithelial-MesenchymalTransitionofBiliaryEpithelialCellsandthereversioneffectofBMP.7AbstractObjective:BiliaryEpithelialCells(BEes)isacellpopulationwhichhashi【ghoxyge
5、nconsumption,hypermetabolismandiseasytobedamaged.Ithasbeenlongrecognizedthatbiliaryfibrogenesisisoneofthedecisiveeventsafterischemicbileductinjury.Despitethis,thecelloriginofbiliaryfibrosisremainedlargelyundefined.TheaimofthisstudyistoinvestigatetheEpithelial-Mesen
6、chymalTransitionofBECsinducedbyTGF-pandthereversioneffectofBMP.7onEMT.Methods:IsolationandcultureofhumanandratprimaryBEes.RecombinanthumanTGF一13Wasaddedtothecellculture.After48hours,TGF-pwaschangedtorecombinanthumanBMP-7.Immunofluorescenceandimmunohistochemicalstai
7、ningwereperformedontheBEes.Results:1.TheBEesofhumanandratsweresuccessfullyisolated,culturedandidentified.2.InvitroexperimentsshowthatBECscoexpressboththeepithelialmarker(E-cadherin,CK-19andIB-catenin)andthemyofibroblastmarker(Vimentin,S100A4andFibronectin)afterincu
8、bationwithfibrogenicTGF—p.3.IncubationofhumanorratsBECswithBMP-7significantlyreducedthemyofibroblastmarkerexpressioninducedbyTGF—p.BMP-7couldreve