Influence of dexamethasone with and without LPS in cell viability.
RAW 264.7 macrophages were pre-exposed for 1 h to dexamethasone followed by 18 h co-exposition with 1 µg/mL of LPS (A) or vehicle (B). The cell viability was assessed by MTT and LDH assays. All results are percentage of control (mean ± SEM of five independent experiments, performed in duplicate). *P<0.05, **P<0.01, ***P<0.001.