摘要
为探讨造血生长因子不同组合方式对脐血CD34+细胞的扩增作用、扩增细胞性能改变及合理的扩增时机,利用吸附单克隆抗体——磁珠分离系统分选出95%~99%纯度的脐血CD34+细胞,在体外液体培养体系中,经重组人干细胞因子(rhSCF)、白细胞介素(IL)3、IL-6、粒-巨噬细胞集落刺激因子、粒细胞集落刺激因子(G-CSF)和红细胞生成素(Epo)的不同组合扩增1~3周。结果表明,脐血CD34+细胞具有良好的扩增效应,细胞总数、集落形成细胞(CFCs)和CD34+细胞可分别扩增500.0±82.5倍、94.0±28.6倍和24.0±3.8倍;SCF是扩增最重要的生长因子,SCF+IL-3+IL-6+G-CSF+Epo组合的扩增效率最高;CFCs和CD34+细胞在1~2周维持在较高水平,以后即快速衰减;此外,扩增也加速了细胞的分化,至第3周时93%CFCs为CFU-GM,极少部分形成BFU-E和CFU-GEMM。因此,合理组合生长因子,把握适宜扩增时机,将有助于扩增细胞在质和量上满足移植和基因治疗等的要求。
Toelucidatetheroleofrecombinanthumanhematopoieticgrowthfactors(HGFs)inex-pandingcordbloodCD34+celswhichwerepurifiedupto95%~99%byamonoclonalantibody mag-neticbeadssortingsystem,theefectsofdiferentcombinationsofHGFs(includingSCF,IL-3,IL-6,GM-CSF,G-CSFandEpo)ontheproliferationanddiferentiationofthesecelswerestudiedina21-dayliquidculturesystem.AcombinationoffiveHGFs,includingSCF,IL-3,IL-6,G-CSF,andEpo,wasidentifiedasthemostpotentcombinationofthosetested,andincreasedtotalnucleatedcelsby500.0±82.5-fold,totalprogenitorcels(CFCs)by94.1±18.6-foldandCD34+celsby24.0±3.8-fold,respec-tively.AmongtheHGFsexamined,SCFwasthemostpotentoneforexpandingcordbloodCD34+cels.MaximalexpansionsofCFCsandCD34+celswereobservedduringthefirsttwoweeksofculture.Ninety-threepercentoftheseCFCswasCFU-GMandafewwereBFU-EandCFU-GEMMat21-dayexpansion.OurstudiesindicatethatunderconditionsofappropriateHGFscombinationandexpansionduration,itispossibletoexpandcordbloodCD34+celsexvivofortransplantationandtherapeuticgenetransfer.
出处
《中华血液学杂志》
CAS
CSCD
北大核心
1996年第6期304-307,共4页
Chinese Journal of Hematology
基金
国家863计划青年科学基金
关键词
胎血
造血干细胞
造血生长因子
扩增
FetalbloodHematopoieticstemcelHematopoieticgrowthfactorsExpan-sion