A PGE2-MEF2A axis enables context-dependent control of inflammatory gene expression

BMDMs or iMACs were generated via differentiation of bone marrow cells or immortalized precursors, respectively, in culture media containing m-CSF for 7 day. Upon differentiation, BMDMs or iMacs were left untreated or stimulated as described below. 1) BMDM WT were stimulated with LPS, PGE2, LPS+PGE2 for 4 hours: each condition in triplicate. This experiment was performed to assess chromatin accessibility in the concomitant presence of pro-inflammatory (LPS) and anti-inflammatory stimuli (PGE2). 2) MEF2A-deficient iMac clones (D7, A7, A8, C7) and MEF2A-proficient (referred to as wild-type) iMac clones (NE, B3 and D10) were generated via CRISPR/Cas9 and stimulated or not with LPS for either 4 hours: each condition in single. This experiment was performed to assess the role in MEF2a in controlling chromatin accessibility upon LPS stimulation.