BMMCs were derived from the bone marrow of Balb/C mice. Cells were maintained in RPMI-1640, 50 μmol/L 2-mercaptoethanol, 1 mmol/L sodium pyruvate, 100 U/mL penicillin−100 μg/mL streptomycin, 0.1 mmol/L non-essential amino acids, 25 mmol/L HEPES, 10% FBS, and 10 ng/mL mouse recombinant IL-3 and SCF. Cells were fed every 7 days. After 4 weeks, cell purity was determined by measuring CD117 and FcεRI expression through flow cytometry: 95% of cells were positive for both CD117 and FcεRI.
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