Fig. 7. Autophagy blockage of BEAS-2B cells after exposure to three sizes of silica particles (Si200, Nano-Si60, Nano-Si40) performed using SQSTM1/p62. (A) The expression of SQSTM1/p62 induced by different sizes of silica particles at concentrations of 6.25, 12.5, and 25 μg mL^–1. (B, b) The expression of BEAS-2B cells after exposure to 25 μg mL^–1 of Si200, Nano-Si60, and Nano-Si40 silica particles. Data are expressed as mean ± S.D. * p < 0.05 compared with control group.