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• W2002097645 abstract "We have adapted a recently published protocol for retroviral gene transfer into hematopoietic cells [A. J. Schilz et al. (1998) Blood 92: 3163–3171] with respect to clinical requirements such as large-volume vector stock generation, adequate cell source, high cell numbers, and serum-free conditions. We present data on transduction efficacy and expression of the multidrug resistance 1 (MDR1) gene in human CD34+ cells from mobilized peripheral blood (PB) mediated by a gibbon ape leukemia virus (GALV)-pseudotyped retroviral vector. Using a 1-day cytokine-mediated prestimulation, consisting of human interleukin (IL)-3, IL-6, stem cell factor (SCF), Flt-3 ligand (FL), and thrombopoietin (TPO), followed by a 3-day transduction procedure, we were able to detect up to 51% CD34+ cells expressing MDR1. Xenotransplantation of transduced cells into NOD/LtSz-scid/scid (NOD/SCID) mice resulted in a mean engraftment level of 23% (0.1 to 87%). As shown by quantitative PCR analysis, a mean of 12.7% (range 0.3 to 55%) of the engrafted human cells in the bone marrow of chimeric mice contained the MDR1 cDNA. Furthermore, enhanced expression of MDR1 above control levels was detected in up to 15% of the engrafted human cell population. Our data suggest that NOD/SCID repopulating cells derived from mobilized PB can be transduced efficiently with existing retroviral vector systems under clinically applicable conditions. We have adapted a recently published protocol for retroviral gene transfer into hematopoietic cells [A. J. Schilz et al. (1998) Blood 92: 3163–3171] with respect to clinical requirements such as large-volume vector stock generation, adequate cell source, high cell numbers, and serum-free conditions. We present data on transduction efficacy and expression of the multidrug resistance 1 (MDR1) gene in human CD34+ cells from mobilized peripheral blood (PB) mediated by a gibbon ape leukemia virus (GALV)-pseudotyped retroviral vector. Using a 1-day cytokine-mediated prestimulation, consisting of human interleukin (IL)-3, IL-6, stem cell factor (SCF), Flt-3 ligand (FL), and thrombopoietin (TPO), followed by a 3-day transduction procedure, we were able to detect up to 51% CD34+ cells expressing MDR1. Xenotransplantation of transduced cells into NOD/LtSz-scid/scid (NOD/SCID) mice resulted in a mean engraftment level of 23% (0.1 to 87%). As shown by quantitative PCR analysis, a mean of 12.7% (range 0.3 to 55%) of the engrafted human cells in the bone marrow of chimeric mice contained the MDR1 cDNA. Furthermore, enhanced expression of MDR1 above control levels was detected in up to 15% of the engrafted human cell population. Our data suggest that NOD/SCID repopulating cells derived from mobilized PB can be transduced efficiently with existing retroviral vector systems under clinically applicable conditions." @default.
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• W2002097645 date "2000-12-01" @default.
• W2002097645 modified "2023-10-10" @default.
• W2002097645 title "MDR1 Gene Expression in NOD/SCID Repopulating Cells after Retroviral Gene Transfer under Clinically Relevant Conditions" @default.
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• W2002097645 doi "https://doi.org/10.1006/mthe.2000.0216" @default.
• W2002097645 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/11124062" @default.
• W2002097645 hasPublicationYear "2000" @default.
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