Fig. 1. Niacinamide (NIA) decreased PM2.5-induced ROS generation. (A) Chemical structure of NIA. (B) MTT assay to determine cell viability after treatment with indicated concentrations of NIA (0, 12.5, 25, 50, 100, or 200 μM). (C) Flow cytometric determination of intracellular ROS scavenging activity of NIA (0, 12.5, 25, 50, 100, or 200 μM). ROS generation was induced by PM2.5. *p<0.05 and #p<0.05 compared with control cells and PM2.5-exposed cells, respectively.
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