Adenovirus-mediated expression of the murine ecotropic receptor facilitates transduction of human hematopoietic cells with an ecotropic retroviral vector

被引:16
作者
Nathwani, AC
Persons, DA
Stevenson, SC
Frare, P
McClelland, A
Nienhuis, AW
Vanin, EF
机构
[1] St Jude Childrens Res Hosp, Dept Hematol Oncol, Div Expt Hematol, Memphis, TN 38105 USA
[2] Inc A Novartis Co, Genet Therapy, Gaithersburg, MD USA
关键词
stem cell; gene therapy; hematopoietic progenitor; transient expression; integration;
D O I
10.1038/sj.gt.3300974
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
One factor limiting the ability to modify human repopulating hematopoietic cells genetically with retroviral vectors is the relatively low expression of the cognate viral receptor. We have tested sequential transduction of human hematopoietic cells with an adenoviral vector encoding the ecotropic retroviral receptor followed by transduction with an ecotropic retroviral vector. Adenoviral transduction of K562 erythroleukemia cells was highly efficiently with >95% of cells expressing the ecotropic receptor at a multiplicity of infection (MOI) of 10(3) with a correspondingly high transduction with a retroviral vector. Ecotropic receptor expression in CD34(+) cells following transduction with adenoviral Vectors was increased by at least two-fold (from 20 to 48%) by replacing the RSV promoter with the CMV E1a promoter, resulting in a parallel increase in retroviral transduction efficiency. Replacing the head portion of the fiber protein in conventional adenoviral vectors (serotype 5) with the corresponding portion from an adenoviral 3 serotype resulted in ecotropic receptor expression in 60% of CD34(+) cells at an MOI of 10(4) and a retroviral transduction of 60% of hematopoietic clonogenic progenitors. The sequential transduction strategy also resulted in efficient transduction of the primitive CD34(+)CD38(-) subset suggesting that it may hold promise for genetic modification of human hematopoietic stem cells.
引用
收藏
页码:1456 / 1468
页数:13
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