資源描述:
《熱預(yù)處理后嗅鞘細(xì)胞上清液誘導(dǎo)神經(jīng)干細(xì)胞向神經(jīng)元定向分化的研究》由會員上傳分享,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。
1、分類號R74神戮需囂裟嵩鬻毳究神經(jīng)千細(xì)胞向神經(jīng)元定問分化嗣餅艽.RegulationanddirectionofNSCs伽2dop乇neuronalfatebyhyperthermiaconditioned研究生姓名指導(dǎo)教師姓名、職稱學(xué)科專業(yè)研究方向湖南師范大學(xué)學(xué)位評定委員會辦公室二零一四年四月==篡鬻一一溉摘要f刪舢舢㈣㈣舢刪刪目的:近年來大量研究證實(shí)嗅鞘細(xì)胞(otfactoryensh三五矗:i騎姜在加入370CM組、400CM組和400CM+R組上清液誘導(dǎo)后,通過免疫熒光計(jì)數(shù)發(fā)現(xiàn),400CM組中分化細(xì)胞神經(jīng)元標(biāo)志物
2、B微管蛋白(p碩士學(xué)位論文一tublinIII,Tuj—1)、微管相關(guān)蛋白2(microtubule-associatedprotein2,MAP一2)陽性細(xì)胞數(shù)目(31.40±1.08%、31.80±1.60%)顯著高于370CM組(23.60+1.36%、22.80+1.66%)和400CM+R組(22.60±1.50%、24.00_+2.30%),370CM與400CM+R兩組之間Tuj-I、MAP一2附l生細(xì)胞數(shù)目無統(tǒng)計(jì)學(xué)差異。Western—blot也證實(shí),在400CM誘導(dǎo)組中,Tuj—l蛋白表達(dá)顯著高于370
3、CM組和400CM+R組,而370CM和400CM+R兩組之間Tuj—l、MAP一2蛋白表達(dá)無顯著差異。RT—PCR結(jié)果示400EC組HIF一1Q及其下游靶基因EPO、VEGF轉(zhuǎn)錄水平較370EC、400EC+R組明顯增高;Westernblot結(jié)果提示400EC組HIF—lQ蛋白表達(dá)含量顯著高于370EC、400EC+R組;glisa檢測發(fā)現(xiàn)400CM組中EPO、VEGF含量顯著高于370CM、400CM+R組。結(jié)論:OECs經(jīng)熱預(yù)處理后,其上清液能更有效的誘導(dǎo)NSCs向神經(jīng)元定向分化,提高其分化比例。熱預(yù)處理后HIF
4、—lQ表達(dá)上調(diào)是促進(jìn)NSCs向神經(jīng)元定向分化的重要因素,HIF—lQ下游靶基因EPO、VEGF激活和表達(dá)可能是提高Nscs向神經(jīng)元分化比例的機(jī)制之一。關(guān)鍵詞:嗅鞘細(xì)胞;熱預(yù)處理;神經(jīng)干細(xì)胞;分化;低氧誘導(dǎo)因子一l熱預(yù)處理后嗅鞘細(xì)胞上清液誘導(dǎo)神經(jīng)干細(xì)胞向神經(jīng)元定向分化的研究ABSTRACTRegulationanddirectionofNSCstoadoptneuronaIfate0lIN5USIbyhyperthermiaconditionedOEOsserum-freeconditionedmediumObjectiv
5、eRecentstudiesprovidesolidevidencefortheimportancetodelineatethecombinedtransplantationofneuralstemcells(NSCs)andolfactoryensheathingcells(OgCs)fortherepairofcentralnervoussysteminjury.Oneofthelimitationsofthisapproachisthattheproportionofneuronsdifferentiatedfro
6、mNSCsstillremainsatlowlevel.Thus,howtoinduceNSCstodifferentiateintoneuronsmoreefficientlybyOgCsisanattractiveproblem,whichneedsattentiontoberesolved.Inthepresentstudy,weinvestigatedtheeffectsofhyperthermia—conditionedogc—conditionedmedium(OCM)oninductionofNSCsint
7、oneurons.Methods3-day—oldpostnatalmousewerekilled,andtheolfactorybulbs(OBs)weredissected.Theconditionedmedia,named370CM,400CM,and400CM+R(treatedwithHIF一1Qinhibitor),werecollectedafterOgCshadbeenincubatedat37℃or40oCfor6hr,followedbyincubationat37℃for42hr.Cellviabi
8、litiesofOgCsweremeasuredusinganMTTassay.Then,theseconditionedmediumwerecollectedandusedforNSCIII碩士學(xué)位論文induction.TheeffectsofhyperthermicpreconditioningonOECsHI