Fig. 2
From: PM2.5 obtained from urban areas in Beijing induces apoptosis by activating nuclear factor-kappa B
Effects of PM2.5 on cell apoptosis. CHO cells were cultured in 6-well plates at a density of 5.0 × 104 cells/ml in 2 ml of F12-K medium supplemented with 10% FBS and incubated overnight. The medium was changed, and the cells were treated with different doses of PM2.5 for 24 h. After 24 h, cell apoptosis was measured by flow cytometry. Data are expressed as the mean ± SD. Each data point represents an average of 3 samples. Experimental samples are compared with the untreated control, *P < 0.05, **P < 0.01