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- W1967010387 abstract "Almost all studies of adenoviral vector-mediated gene transfer have made use of the adenovirus type 5 (Ad5). Unfortunately, Ad5 has been ineffective at infecting hematopoietic progenitor cells (HPC). Chimeric Ad5/F35 vectors that have been engineered to substitute the shorter-shafted fiber protein from Ad35 can efficiently infect committed hematopoietic cells and we now show highly effective gene transfer to primitive progenitor subsets. An Ad5GFP and Ad5/F35GFP vector was added to CD34(+) and CD34(-)lineage(-) (lin(-)) HPC. Only 5-20% of CD34(+) and CD34(-)lin(-) cells expressed GFP after Ad5 exposure. In contrast, with the Ad5/F35 vector, 30-70% of the CD34(+), 50-70% of the CD34(-)lin(-) and up to 60% of the CD38(-) HPC expressed GFP and there was little evident cellular toxicity. Because of these improved results, we also analyzed the ability of Ad5/F35 virus to infect the hoechst negative 'side population' (SP) of marrow cells, which appear to be among the very earliest multipotent HPC. Between 51% and 80% of marrow SP cells expressed GFP. The infected populations retained their ability to form colonies in two short-term culture systems, with no loss of viability. We also studied the transfer and expression of immunomodulatory genes, CD40L (cell surface expression) and interleukin-2 (secreted). Both were expressed at immunomodulatory levels for >5 days. The ability of Ad5/F35 to deliver transgenes to primitive HPC with high efficiency and low toxicity in the absence of growth factors provides an improved means of studying the consequences of transient gene expression in these cells." @default.
- W1967010387 created "2016-06-24" @default.
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- W1967010387 date "2001-06-01" @default.
- W1967010387 modified "2023-09-27" @default.
- W1967010387 title "Efficient infection of primitive hematopoietic stem cells by modified adenovirus" @default.
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- W1967010387 doi "https://doi.org/10.1038/sj.gt.3301488" @default.
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