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3 protocols using human g csf

1

Hematopoietic Progenitor Cell Differentiation

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Hematopoietic CD41+ progenitor cells obtained from iPSC differentiation (8 days after start of EB culture) were seeded at a concentration of 20,000–50,000/ml in basic and complete methylcellulose medium (HSC006 with no cytokines added and HSC007 containing IL-6, erythropoietin, SCF, and IL-3, respectively; R&D Systems). HSC007 was additionally supplemented with 20 ng/ml human G-CSF and 20 ng/ml murine M-CSF, while HSC006 was supplemented with 50 ng/ml murine GM-CSF (all Peprotech). Cells were grown for 7–10 days and colonies composed of more than 50 cells were counted.
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2

Generation of MDSCs from CD34+ Cells

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Human CB was provided from the Catholic Hematopoietic Stem Cell Bank after written informed consent given by normal full-term pregnant women. For MDSCs generation, isolated CD34+ cells (Miltenyi Biotec, Bergisch Gladbach, Germany) were cultured in a 48-well plate (BD Falcon, Bedford, MA) at 1 × 105 cells/ well with 1 ml of IMDM containing 10% FBS (Gibco, Grand Island, NY, United States), 10% penicillin–streptomycin (100 U/ml; Lonza Walkersville, MD, United States), 2 mM L-glutamine (Lonza Walkersville) (10% complete medium), 100 ng/ml human GM-CSF (300–03, PeproTech, Rocky Hill, NJ, United States), 100 ng/ml human G-CSF (300–23, PeproTech), or 100 ng/ml human M-CSF (300–25, PeproTech) and 50 ng/ml human SCF (300–07, PeproTech). After incubation for 7 days, the cells were removed from the 48 well plate and centrifuged at 1,300 rpm for 5 min. After one wash with serum free IMDM, the cells were cultured for 2 weeks and media was changed every 7 days. From weeks 4–6, the cells were cultured at a higher density (5 × 105 cells/well). Media was changed every 7 days throughout 6 weeks of the culture.
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3

Hematopoietic Progenitor Differentiation on OP9

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CD34+ hematopoietic progenitor cells were purified from human cord blood by Ficoll-based density gradient centrifugation followed by CD34 magnetic beads selection (Miltenyi Biotec). OP9 mouse bone marrow stromal cells were cultured in the 6-well plate at 104 cells/well the day before CD34+ purification. On Day 0, CD34+ cells were co-cultured with OP9 cells at 105 cells/well in Iscove’s modified Dulbecco’s medium supplemented with 20% FBS, 1% antibiotics, 20 ng/mL human GM-CSF and 100 ng/mL human G-CSF (PeproTech). After overnight culture, tumor-conditioned media (TCM) from RPMI8226 human myeloma cell lines was added at 10% with DMSO or 100 nM BMS-595. On Day 3 and 6, fresh media containing 20 ng/mL GM-CSF, 100 ng/mL G-CSF, 10% TCM, and DMSO or 100 nM BMS-595 was added in the wells. On Day 9, the cells were collected and analyzed by flow cytometry.
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