BMMФ were stimulated either with IL-4 (10 ng/ml, AF-214-14, Peprotech), lipopolysaccharide (100 ng/ml, Sigma) or dexamethasone (100nM, D4902, Sigma) to respectively achieve M(IL-4), M(LPS) or M(GC) polarization state. In some experiments, BMMФ were treated with C75 (Sigma), Cerulenin (Sigma), Etomoxir (Sigma), pan-AKT inhibitor MK-2206 (1 mM, Cayman Chemical), 25-hydroxycholesterol (10 μM, Cayman chemical), N-acetyl cysteine (10mM, Sigma), Diphenyleneiodonium chloride (DPI, 5 μM, Sigma), L-NG-Nitroarginine methyl ester (L-NAME, 1mM, Cayman Chemical), Allopurinol (100 μM, Sigma), hydrogen peroxide (Sigma), SIRT1 activator II (Sigma), EX-527 (Sigma), Compound C (Sigma), AICAR (Abcam), HMGCoA (Sigma), water-soluble cholesterol (Cholesterol–methyl-β-cyclodextrin, Sigma) or Simvastatin (Sigma).
For fatty acid treatment, palmitic or oleic acid (Cayman) were solubilized at 100mM in absolute ethanol at 60°C. Fatty acid were conjugated at the desired concentration using a sonicator water bath into the macrophage culture medium to avoid endotoxin contamination from BSA54 (link).