Fig. 2

Cell viability in an in vitro model of tolerance and sepsis. Macrophages were stimulated either with a single dose of LPS 0.5 μg/ml followed by a higher dose of LPS (1 μg/ml) (TD group) or directly with LPS (1 μg/ml) (D group). The MTT assay was performed in the experimental design described in the Fig. 1b (48 h after the start of the experiment)