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The differentiated PC12 cells were exposed to 3, 6, 9, and 12 μg/mL LPS for (A). 12, (B). 24, (C). 48, and (D). 72 h. Cell viability was determined by MTT assay. Bars represent mean data ± S.E.M from three independent experiments. Data were analyzed using one-way ANOVA, followed by a Bonferroni post-hoc test. Percentage of cell viability of LPS-stimulated cells was compared to control. *p < 0.05, **p < 0.01, ***p < 0.001 considered to be statistically significant.
