Fig. 1

Effects of BF on cell viability in primary microglia cells. Microglial cells were exposed to different concentrations of BF (0.1–100 μM) for 24 h. Cell viability was measured using the MTT assay, and data were normalized as percentage of negative control with DMSO (0.1%) (C, white column). EthO 100% and DMSO 10% were used as positive controls to induce cell death (black columns). Statistical analyses were carried out by using one-way ANOVA followed by post hoc Student–Newman–Keuls test. Results are expressed as means ± SEM from three independent experiments. *p < 0.05; **p < 0.01; **p < 0.001 compared with untreated control (DMSO, white column)