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2 protocols using recombinant human interleukin il 3

1

Cell Culture Protocols for Pluripotent and Leukemia Cells

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H9 hESCs with a normal 46, XX karyotype were acquired from the WiCell Research Institute. The H9 cells were cultured in feeder or feeder-free conditions, depending on the experimental procedure, as described elsewhere2 (link). MDS-L cells were maintained in RPMI-1640 medium (Thermo Fisher Scientific) supplemented with 10% FBS, 1% penicillinstreptomycin and 15 ng ml−1 recombinant human interleukin (IL)-3 (Peprotech). HEK293T cells were purchased from the American Type Culture Collection and maintained in DMEM medium (Thermo Fisher Scientific) with 10% FBS and 1% penicillinstreptomycin. All cells were cultured at 37 °C with 5% CO2 and routinely tested for mycoplasma infection (Universal Mycoplasma Detection Kit, American Type Culture Collection).
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2

Multiparametric Basophil Activation Assay

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The following reagents were used for flow cytometry and microscopy staining; Avidin Alexa Fluor TM 488 (ThermoFisher Scientific), APC mouse anti-human CD203c (Clone NP4D6, BD Biosciences), PE mouse anti-human CD63 (Clone H5C6, BD Pharmingen TM ), Alexa Fluor TM 647 mouse anti-human CD63 (Clone H5C6, BD Pharmingen TM ), mouse anti-human IgE labeled with Alexa Fluor 405 NHS Ester (Clone GE-1, Sigma Aldrich GmBH) using the procedure described by Life Technologies.
The reagents used for stimulation of basophils were mouse anti-human IgE (Clone G7-18, BD Pharmingen TM ), recombinant human interleukin (IL)-3 (Peprotech), N-Formyl-Met-Leu-Phe (fMLP, Merck), recombinant major birch pollen allergen (rBet v 1, Biomay).
Buffers used were activation buffer ((Hank's balanced salt solution (Invitrogen) with 20 mM HEPES and 7.5% NaHCO3, pH 7.4)), BD FACS TM lysing solution 10x concentrate (BD Biosciences) and fixation buffer (Biolegend).
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