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23 protocols using hsc007

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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Quantifying Hematopoietic Progenitor Cells

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6×104 Bone marrow cells from Foxm1fl/fl or Foxm1fl/flTie2-Cre mice were plated in triplicate in 35-mm tissue culture dishes containing Mouse Methylcellulose Complete Media (HSC007, R&D systems), after 10 days of incubation at 37 °C in 5% CO2, CFU-GEMM, CFU-GM, CFU-G, CFU-M, BFU-E were scored under an inverted microscope.
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3

LT-HSCs Colony Formation Assay

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Long‐term (LT)‐HSCs were sorted by fluorescence‐activated cell sorting (FACS) and then cultured in 96‐well cell plates using a methylcellulose‐base medium (HSC007; R&D Systems, Minneapolis, MN, USA). Ten replicate wells were prepared for each sample. We used 96‐well cell culture plate, three cells per well. Two weeks after plating, the number and sizes of colonies were counted under a microscope.
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4

MLL-AF9 Leukemia Mouse Model

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Bone marrow was isolated from WT C57BL/6J mice (CD45.2). LinKit+Sca-1+ cells were separated by FACS and cultured. Then, cells were transduced with MSCV-MLL-AF9-IRES-GFP retrovirus and plated in methylcellulose (R&D Systems, HSC007) for 5 d (refs. 36 (link),37 (link),62 (link)). GFP-positive cells were FACS sorted and 1.2 × 105 cells were retro-orbitally transplanted into a sublethally irradiated (650 rads) congenic C57BL/6 mouse (CD45.1) to generate an MLL-AF9 leukemic primary recipient mouse. For secondary transplantation, liver was isolated from the leukemic primary recipient mouse and GFP-positive cells were sorted by FACS. A total of 5,000 cells were injected retro-orbitally on day 1 into 8-week-old male congenic C57BL/6 (CD45.1) secondary recipient mice that had received sublethal irradiation (250 rads) on day 0. Mice were randomly assigned to treatment groups (n = 10 mice per group). Starting on day 12, treatments were administered i.p. to contralateral sides of the abdomen every other day for a total of ten doses. At 19, 26 and 33 d after injection of cells, bone marrow was aspirated to analyze leukemic infiltrates as described below. On day 34, echocardiography was performed followed by killing.
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5

Quantifying iPSC-Derived Macrophage Colonies

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A total of 1,500 primary bone marrow-derived lineage-negative cells, and 25,000 or 50,000 iPSC-Mφ, were seeded in a methylcellulose medium (HSC007, R&D Systems) and allowed to grow for 7 days before colonies containing more than 50 cells were counted.
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6

Clonogenic Assay for Hematopoietic Cells

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Bulk BM cells or sorted HSPCs/HSCs/pre-LSCs were spread in 1mL cytokine-containing methylcellulose media (HSC007 for mouse, HSC003 for human, R&D systems), and plated in 35mm culture dish. For murine cells, colonies were counted and replated after 7 days.
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7

Clonogenic Potential Quantification

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Suitable cells were plated in 96-well plates at the density of 1 cells/well, with 20 replicates per sample, in a methylcellulose-based medium (R&D, HSC007). After culturing for 14 days, the ensuing colonies were counted under a microscope. Based on the approximate cell load, the colonies were defined as large (>10,000 cells), medium (1,000–10,000) and small (<1,000).
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8

Evaluating LSC Differentiation with ILCs

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LSCs were obtained from MllPTD/WT: Flt3ITD/ITD mouse spleen and co-cultured with or without WT, IFN-γ−/− or TNF−/− ILC1s for 3 days. Cells were then plated into mouse methylcellulose complete medium (R&D, HSC007) supplied with human transferrin (200 μg/ml), recombinant human insulin (10 μg/ml), recombinant human SCF (50 ng/ml), mouse recombinant IL-3 (10 ng/ml), IL-6 (10 ng/ml), and recombinant mouse EPO (5 IU/ml). Cultures were incubated at 37°C in a humidified atmosphere of 5% CO2 for 10–14 days. Colony numbers were counted using a microscope.
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9

Long-term Hematopoietic Stem Cell Assay

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Cells were plated in a methylcellulose-based medium (R&D, HSC007). For LT-HSCs, we used 96-well cell culture plates (5 cells/well), with each sample added to 10 wells. For BM and spleen cells, we used 24-well cell culture plate (104 cells/well), with each sample added to six wells. Two weeks after plating, the colonies were counted using a microscope.
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10

Hematopoietic Progenitor Assay in Mice

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BMDMs or Linbone marrow cells were evaluated for the presence of hematopoietic progenitors capable of forming colonies in semisolid medium in response to cytokine stimulation as previously described.45 (link) Briefly, fresh Lin bone marrow cells or BMDMs after induced differentiation into macrophages for five days were seeded into standard mouse methylcellulose media supplemented with insulin, transferrin, SCF, IL-3, IL-6, and erythropoietin (HSC007, R&D Systems, Minneapolis, MN). After seven days in culture, colonies of ≥50 cells were visible and were examined morphologically using whole plate stack images acquired using an AXIO-Z1 microscope and AXIO-vision software (Zeiss, Jena, Germany) to identify and enumerate burst-forming erythroid progenitors (BFU-E), colony-forming myeloid progenitors (CFU-GM), and the multi-potential progenitors (CFU-GEMM).
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