BMDMs were isolated from 7- to 8-week-old mice and cultured as described previously to obtain naïve M0 macrophages (Dai et al., 2017 (link)). For M1 polarization, BMDMs were stimulated with 10 ng/ml LPS (Sigma Aldrich) for 24 h. For M2 polarization, BMDMs were stimulated with 10 ng/ml IL-4 (BioLegend) for 24 h. Pharmacologic inhibition of p38 MAPK (SB203580; Sigma Aldrich) was achieved by pretreating BMDMs with 10 µM SB203580 for 1 h before addition of LPS or IL-4.
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