Fig. 5From: Effect of physicochemical character differences on the genotoxic potency of kaolinGeneration of inflammatory cytokines. RAW264 cells were exposed to 100 μg/mL of kaolins for 24 h, and the concentrations of IL-1β and TNF-α in culture supernatants were measured by the ELISA method. Control represents treatment with saline containing 0.05% of Tween 80. a IL-1β. b TNF-α. The values represent the mean of 3 independent studies ± SDBack to article page