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1、萬方數(shù)據(jù)重組hTGF.131腺病毒轉(zhuǎn)染BMSCs對(duì)其向軟骨分化的影響夏萬堯劉偉丁文龍鐘梅芳周廣東崔磊曾誼林【摘要】目的研究重組hTGF.131腺病毒(adeno.hTGF.81)轉(zhuǎn)染BMSCs對(duì)其向軟骨分化的作用。方法重組adeno.hTGF—B1轉(zhuǎn)染第一代豬BMSCs,對(duì)照組轉(zhuǎn)染adeno.LacZ,腺病毒的量以200pfu/細(xì)胞計(jì)算,轉(zhuǎn)染后ld,消化收集重組腺病毒轉(zhuǎn)染后的BMSCs.置于無菌15IIll聚丙烯試管中,體外細(xì)胞團(tuán)聚集連續(xù)誘導(dǎo)培養(yǎng)21d,然后分別從大體觀察、組織學(xué)和Ⅱ型膠原蛋白免疫組化的檢測對(duì)形成組織進(jìn)行評(píng)價(jià)。結(jié)果實(shí)驗(yàn)組細(xì)胞團(tuán)收縮成近似小球形的組織塊,外觀成乳
2、白色,觸之有一定的彈性。蘇木素.伊紅染色觀察可見細(xì)胞團(tuán)外周為由數(shù)層扁平狀成纖維樣細(xì)胞組成的纖維軟骨膜,下層和中部區(qū)域有巢狀軟骨形成,軟骨陷窩明顯可見,軟骨細(xì)胞較均勻分布,包埋在軟骨陷窩內(nèi)。Safranin’O染色顯示.形成的軟骨組織區(qū)域有大量被染成桔紅色蛋白多糖類基質(zhì)分泌,Ⅱ型膠原免疫組化染色檢測顯示細(xì)胞團(tuán)中央出現(xiàn)較明顯的陽性染色區(qū)域??梢娮攸S色的顆粒分布于胞漿內(nèi)。而對(duì)照組形成的組織塊略小,蘇木素.伊紅染色觀察見無軟骨樣組織形成,主要為較致密無結(jié)構(gòu)特征的纖維樣組織,Safranin’O染色也無被染成桔紅色蛋白多糖類基質(zhì)分泌。Ⅱ型膠原免疫組化染色檢測顯示也無明顯的陽性染色區(qū)。結(jié)
3、論應(yīng)用重組hTGF.B1腺病毒轉(zhuǎn)染的BMSCs進(jìn)行細(xì)胞團(tuán)聚集誘導(dǎo)培養(yǎng),可誘導(dǎo)BMSCs向軟骨細(xì)胞表型分化而形成軟骨,為hTGF.131基因轉(zhuǎn)染的BMSCs在軟骨組織工程應(yīng)用中奠定了基礎(chǔ)?!娟P(guān)鍵詞】骨髓間充質(zhì)干細(xì)胞;基因轉(zhuǎn)染;腺病毒;轉(zhuǎn)化生長因子plEffectofadeno·hTGF-pltransfection011invitrochondrogenicdifferentiationofbonemalTowstromalcellsX/A形帆·yao,LIUWei,DINGWen—long,ZHONGMei-fang,ZHOUGuang-dD增,CUILei,CA0Yi-li
4、n.DepartmentofPlastic&ReconstructiveSurgery,ShanghaiKeyLaboratoryof咒ssueEngineering,TheNinthPeople’sHospital,SchoolofMedicine,鰳刪咖iJiaotongUniversity,舶喇200011.China—Correspondingauthor:CAOYi—lin【Abstract】ObjectiveToinvestigatetheactionofchondmgenesisdifferentiationofbonenlalTowstromalceHs(BM
5、SCs)transfectedwithadeno-hTGF一131.MethodsIntheexperimentgroup,replication—deficientadenovirusescarryinghumanhTGF-BlcomplementaryDNA(adeno-hTGF-B1WaSconstructedandappliedtotransfecttothefirstgenerationBMSCs.Asacontrol,eachBMSCswastransducedwith200pfuofadeno.LacZgene.Onedayaftertransfer,BMSCs
6、weretrypsinized。counted,and5×105cellsaliuotswerespundownat500rpmperminutein15mlpolypropyleneconicaltubesandthenculturedinadefinedmediuminanincubatorat37℃for21days.neaggregateswereharvestedattimepointstO21daysandassessedbygrossobservation,histologicalanalysesandimmunohistochemicallocalizatio
7、noftypeIIcollagen.ResultsWhenharvestedat21days.eachpelletshrinkedtOspheroidtissuewithapearlyopalescenceingrossmorphologyandfoundtoberelativelyfirm.H.EstainingshowedelongatedliningceHsappearedasperichondrium.1ikecellsatthesurface.Somenestsofcartilagewereo