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LPS increases the expression of cleaved caspase-3 in AMs from silicosis patients. (a and b) AMs from observers or silicosis patients in the presence or absence of LPS were analyzed for cleaved caspase-3 expression by western blotting; β-actin was used as a loading control. (c) Cleaved caspase-3/β-actin for each group. Significance was determined using one-way ANOVA (n = 6. *P < 0.05 vs control).
