Effect of inhibition of endocytosis on sTNFα secretion in asm+/+ and asm−/− macrophages. Macrophages from asm+/+ and asm−/− mice were treated for 4 h with LPS (10 ng/ml) in the presence and absence of Dynasore (80 μm), chlorpromazine (2.5 μg/ml), or monodansylcadaverine (MDC) (50 μm) added 1 h after LPS stimulation. sTNFα in the medium was measured by ELISA. Statistical significance of the main effect (***, p < 0.001; **, p < 0.01) and interaction effect (###, p < 0.001) was determined by two-way (for Dynasore treatment) and one-way (for chlorpromazine and monodansylcadaverine treatments) ANOVA.