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Stem Cells. 2007 Oct;25(10):2610-8. Epub 2007 Jul 5.

No evidence of clonal dominance in primates up to 4 years following transplantation of multidrug resistance 1 retrovirally transduced long-term repopulating cells.

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1
Research Group Pharmacology of Cancer Treatment, German Cancer Research Center, Heidelberg, Germany.

Erratum in

  • Stem Cells. 2008 Jan;26(1):299. Zeller, Werner J [corrected to Zeller, Walter J].

Abstract

Previous murine studies have suggested that retroviral multidrug resistance 1 (MDR1) gene transfer may be associated with a myeloproliferative disorder. Analyses at a clonal level and prolonged long-term follow-up in a model with more direct relevance to human biology were lacking. In this study, we analyzed the contribution of individual CD34-selected peripheral blood progenitor cells to long-term rhesus macaque hematopoiesis after transduction with a retroviral vector either expressing the multidrug resistance 1 gene (HaMDR1 vector) or expressing the neomycin resistance (NeoR) gene (G1Na vector). We found a total of 122 contributing clones from 8 weeks up to 4 years after transplantation. One hundred two clones contained the G1Na vector, whereas only 20 clones contained the HaMDR1 vector. Here, we show for the first time real-time polymerase chain reaction based quantification of individual transduced cell clones constituting 0.0008% +/- 0.0003% to 0.0041% +/- 0.00032% of primate peripheral blood cells. No clonal dominance was observed. Disclosure of potential conflicts of interest is found at the end of this article.

PMID:
17615269
DOI:
10.1634/stemcells.2007-0017
[Indexed for MEDLINE]
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