Figure 2: Effects of fluoride on the release of inflammatory cytokines of NO (a), TNF-α (b), and IL-1β (c) in BV-2 cells. Intracellular DAF-FM fluorescence intensity for NO and concentrations of TNF-α and IL-1β in the cell culture media were measured by flow cytometry and ELISA kits, respectively. Bars were presented as mean ± SD. * and ** compared to the control group.