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臍帶血移植現(xiàn)狀及進(jìn)展彥【摘要】臍帶血作為一種重要的干細(xì)胞來源,其優(yōu)點(diǎn)主要包括方便,對產(chǎn)婦和供者無害;病原微自1988年第一例臍帶血移植以來,臍帶血造血干細(xì)胞移植發(fā)展迅速,目前已越來越多的應(yīng)用床治療中。據(jù)統(tǒng)計(jì),目前臨采用臍帶血移植治療的疾病已經(jīng)達(dá)到70余種[1],治療的患者(包括兒血庫,了超過500,000份的可供查詢和使用的臍帶血。隨著臍帶血庫的發(fā)展,建立了多個臍帶血庫的聯(lián)合組織,最為有名的是Netcord,其首先建立了一套全球公認(rèn)的臍帶血、、凍存和NMDP(NationalMarrowDonorProgram)和的JCBN(JapanCordBloodBankNetwork)等。這些份臍血和之間的HLA差異不應(yīng)超過1個位點(diǎn)。兒童惡:Eurocord了無血緣相合骨髓移植(HLA6/6,未處理或清除T細(xì)胞)和不相合臍植接近),復(fù)發(fā)率基本相同,兩年無病生存率(DFS)31%(處理的BMT43%,T細(xì)胞清除的BMT于HLA相合的BMT。但若UCBT有1個位點(diǎn)不合,同時輸注細(xì)胞數(shù)低于3×107/kg,其移植相關(guān)率結(jié)果顯示,盡管植入延遲,但CBT和BMT的生存率基本一致。同年,國際血液和骨髓移植(CenterforInternationalBloodandMarrowTransntResearch,CIBMTR)和紐約血液中心(NewYorkBloodCenter,NYBC)的亦顯示CBT和1個位點(diǎn)不合的BMT有著相同的DFS[11]。而同期東京大學(xué)26%)和3年DFS(70%vs60%),UCBT和BMT/PBSCT無顯著差異。綜合相關(guān),新加坡總醫(yī)院對比分析[16]。其中,AML484例(CB173,BM311),ALL336例(CB114,BM222)。所有均接受清髓造血干細(xì)胞移植。對于AML,UCBT療效總體低于UBMT;多因素分析顯示,和UBMT相比,UCBT的OS較低(1年57%vs69%,2年48%vs59%),DFS較低(1年51%vs62%,242%vs54%),TRM累計(jì)發(fā)生率較高(1年30%vs19%,2年33%vs22%)。而對于ALL,UCBTUBMT164%22年DFS為46%vs44%;1年TRM為21%vs23%,2年TRM為24%vs25%。而無論是AML,還是ALL,綜合大量的對比分析結(jié)果,GluckmanE[7]提出了不同種類造血干細(xì)胞移植的選擇策略。①細(xì)胞數(shù)上述均為無血緣關(guān)系的臍帶血移植,對于有血緣關(guān)系的HLA相合臍帶血移植(RCBT),年TRM明顯低于單份移植(24%vs39%,p=0.02)。病44名,其它血液病17名。82%的獲得供者細(xì)胞植入。除一位兩份臍血長期混合嵌合外,其(68.6%vs22.2%,p=0.007)。兩份臍血間的TNC差異?。ǎ?5%)和較高的TRM和復(fù)發(fā),以及較低對未植入臍血反應(yīng),產(chǎn)生IFN-γ。而使用植入臍血或其它第細(xì)胞刺激,則無明顯的IFN-γ分泌。3名ScaradavouA等[23]則認(rèn)為在雙份臍帶血移植中,CD34+細(xì)胞活性低(<75%)的臍血很難植活。的。但確切的結(jié)論仍有待更大規(guī)模的臨床試驗(yàn)來證實(shí)。心肺血液(NHLBI)正在進(jìn)行一項(xiàng)傳統(tǒng)的清髓性預(yù)處理可導(dǎo)致患者出現(xiàn)嚴(yán)重的臟器損害和致死染,影響患者的長期生存;非清可縮短植入時間,減少TRM,而復(fù)發(fā)率卻未見增加。Brunstein等[24]應(yīng)用環(huán)磷酰胺/氟濱/200cGy預(yù)現(xiàn)排斥(13.6%),其余的中位植入時間為天。天的血小板植入率為%。1年時,所有存活均為單一供者植入。59%發(fā)生Ⅱ-Ⅳ度aGVHD,cGVHD發(fā)生率為23%。19%的在6個月內(nèi)死于一種好的治療。MajhailNS等[26]比較了采取RIC的43例臍血移植病例和47例其它造血干細(xì)胞移植病例,這些患者均為55歲以上的老年人。RIC方案為TBI(200cGy)聯(lián)合環(huán)磷酰胺和氟濱(n=69),或聯(lián)合和氟濱(n=16),或聯(lián)合和克拉(n=5)。兩組的3年無疾病進(jìn)展存活率(30%vs34%,p=0.98)和總生存率(43%vs34%,p=0.57)均無明顯差異。東京的研究者亦了RIC的臍帶血移植在老年患者的療效[27]。70例中有50例,74%的死因和復(fù)發(fā)無關(guān),是第一位的原因。2年的總生存率和無疾病進(jìn)展生存率均為23%。高率被認(rèn)為是該治療方法亟SAA1例,惡性淋巴瘤5例)進(jìn)行RIC-UCBT,中位56.5歲,32例患者60d完全植入,中性粒細(xì)胞植入的中位時間20d,100dTRM僅為12%,1年OS則高達(dá)70%。者100dDNA嵌合率鑒定顯示單份臍血100%植入。TakagiS等[32]對14例接受RIC臍血移植的骨髓纖維化病例進(jìn)行了總結(jié),13例獲得中性粒細(xì)胞植均在14天,所有均顯示完全供者嵌合。說明從供者細(xì)胞植入的角度來看,該方療嚴(yán)重骨髓纖CutlerC[33]結(jié)合自己的臨床實(shí)踐,并總結(jié)了諸多RIC臍血移植,認(rèn)為RIC可有效減低清髓處理方案不應(yīng)提倡,因?yàn)橹踩胧〉陌l(fā)生率較高,除非難以耐受。建議采用適當(dāng)劑量、非清髓方案處理大多數(shù)需要進(jìn)行臍帶血移植的。①持續(xù)灌注擴(kuò)增:臍帶血造血細(xì)胞不是在靜態(tài)的培養(yǎng)基中而是在含有生長因子的生物反應(yīng)器中培k等4倍(5),M為2倍(4),而+和+細(xì)胞均增加不明顯。分別輸注給7名,良應(yīng)髓、和小植時無化。oaL]了例老年L病例,均同時輸注少量處理的臍帶血和經(jīng)過體外擴(kuò)增的臍帶血細(xì)胞。兩人均快速植入,無重。 腫瘤中心使用該方法擴(kuò)增的臍帶血進(jìn)行了隨機(jī)的臨床試驗(yàn)[39]。71名患高危惡性血液病的被隨機(jī)分配,或者接受處理的雙份臍血移植,或者接受一份擴(kuò)增臍血和一份未擴(kuò)增臍血聯(lián)合輸注。擴(kuò)增組和非擴(kuò)增組輸注的TNC分別為3.5×107/kg和3.6×107/kgCD34細(xì)胞分別為1.8×105/kg和1.1×105/kg。采用RIC方案,中性粒細(xì)胞中位植入時間,擴(kuò)增組和非擴(kuò)增組分別為7天和14天 MdeLima等[43]進(jìn)行了一項(xiàng)Ⅰ/Ⅱ期的臨床試驗(yàn),以驗(yàn)證使用四乙基五胺(TEPA)培養(yǎng)臍血細(xì)胞的可行性 合移植。所有均獲得植入,中位植入時間14天(7-34),而傳統(tǒng)雙份臍血移植的植入時間為25天髓處理后,每人均接受雙份臍血移植(一份處理,一份經(jīng)體外擴(kuò)增)。9名在中位時間16天的時候中性粒細(xì)胞植入,明顯早于傳統(tǒng)雙份臍血移植的26天。中位隨訪時間354天,7名無病生存并獲得完全供者細(xì)胞植入。所有均出現(xiàn)Ⅱ-Ⅲ度aGVHD,但均對治療有效。3名出現(xiàn)局限性cGVHD, ③共培養(yǎng)擴(kuò)增:處理的臍帶血與造血微環(huán)境的基質(zhì)成分,特別是間充質(zhì)干細(xì)胞(MSCs)在含經(jīng)處理的臍帶血一起輸注[46]。經(jīng)過擴(kuò)增,TNC和CD34+細(xì)胞增加約12倍,中性粒細(xì)胞和血小板中位植入時間分別為14.5天(12-23)和30天(25-51)。只有2名出現(xiàn)Ⅱ度aGVHD,1名150天于OkasM等更是通過體外擴(kuò)增臍者T細(xì)胞,用于臍血移植后植入失敗或復(fù)發(fā)的后續(xù)治療,殖水平和擴(kuò)增的臍血以及成人外周血T細(xì)胞基本相當(dāng)。因此,擴(kuò)增臍血T細(xì)胞用于DLI在臨床是可行的,未來可作為治療干細(xì)胞移植后植入失敗或復(fù)發(fā)的有效。的15倍[48]。Ibatici等[49]應(yīng)用臍血骨髓腔內(nèi)直接植入的方法進(jìn)行了29例成人臍血移植,中位38歲,的中位時間分別為23d和38d,較常規(guī)臍血移植植入時間明顯縮短。只有8%發(fā)生Ⅰ-Ⅱ度急性GVHD。性粒細(xì)胞累計(jì)植入率無顯著差異(70%vs80%,p=0.27)。IBCB的血小板60天累計(jì)植入率達(dá)82%,遠(yuǎn)間較早(9-17天,中位10天),造成的顯著降低;DNA多態(tài)性分析顯示,型最早為06/kgCD3+其累計(jì)發(fā)生率為96%、95%和91%。血小板中位植入時間為32天,累計(jì)植入率78%。Ⅰ--Ⅳ度小板植入率為75%,中位植入時間53天。中位隨訪6.8年,5位患者無病生存。Gonzalo-DaganzoR等[55]Reimann,V.StemCellsDerivedFromCordBloodinTransntationandRegenerativeMedicine.DtschArzteblInt.2009Dec;106(50):831-6.ElianeGluckman,Cordbloodtransntation:stateoftheNetcord-FACTInternationalStandardsforCordBloodCollection,Banking,andReleaseforAdministration》:Edition,January2010.RubinsteinP,CarrierC,ScaradavouA,KurtzbergJ,AdamsonJ,MigliaccioARetal. 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