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Blood. 2009 Aug 13;114(7):1319-30. doi: 10.1182/blood-2009-03-210005. Epub 2009 May 4.

Stable gene transfer and expression in cord blood-derived CD34+ hematopoietic stem and progenitor cells by a hyperactive Sleeping Beauty transposon system.

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  • 1Division of Pediatric Blood and Marrow Transplantation, Berlin, Germany.

Abstract

Here we report stable gene transfer in cord blood-derived CD34(+) hematopoietic stem cells using a hyperactive nonviral Sleeping Beauty (SB) transposase (SB100X). In colony-forming assays, SB100X mediated the highest efficiency (24%) of stable Discosoma sp red fluorescent protein (DsRed) reporter gene transfer in committed hematopoietic progenitors compared with both the early-generation hyperactive SB11 transposase and the piggyBac transposon system (1.23% and 3.8%, respectively). In vitro differentiation assays further demonstrated that SB100X-transfected CD34(+) cells can develop into DsRed(+) CD4(+)CD8(+) T (3.17%-21.84%; median, 7.97%), CD19(+) B (3.83%-18.66%; median, 7.84%), CD56(+)CD3(-) NK (3.53%-79.98%; median, 7.88%), and CD33(+) myeloid (7.59%-15.63%; median, 9.48%) cells. SB100X-transfected CD34(+) cells achieved approximately 46% engraftment in NOD-scid IL2gammac(null) (NOG) mice. Twelve weeks after transplantation, 0.57% to 28.96% (median, 2.79%) and 0.49% to 34.50% (median, 5.59%) of total human CD45(+) cells in the bone marrow and spleen expressed DsRed, including CD19(+) B, CD14(+) monocytoid, and CD33(+) myeloid cell lineages. Integration site analysis revealed SB transposon sequences in the human chromosomes of in vitro differentiated T, B, NK, and myeloid cells, as well as in human CD45(+) cells isolated from bone marrow and spleen of transplanted NOG mice. Our results support the continuing development of SB-based gene transfer into human hematopoietic stem cells as a modality for gene therapy.

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PMID:
19414858
[PubMed - indexed for MEDLINE]
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