Research Article

1-Nitropyrene Induced Reactive Oxygen Species–Mediated Apoptosis in Macrophages through AIF Nuclear Translocation and AMPK/Nrf-2/HO-1 Pathway Activation

Figure 2

1-NP induced apoptosis and necrosis in RAW264.7 macrophages. The portion of apoptosis and necrosis was measured by Annexin V-FITC and PI assays using flow cytometry. (a) Cells were incubated with 1-NP at concentrations of 0, 3, 10, 30, and 50 μM for 24 h at 37°C. The upper left quadrant (Annexin V−/+) is representative of necrosis; the upper right and lower right quadrants (Annexin V+/PI+ and Annexin V+/PI−) are representatives of apoptosis; and the lower left quadrant (Annexin V−/PI−) is representative of living cells. (b) Quantitatively, the percentage of necrotic cells, viable cells, and apoptotic cells was calculated and analyzed. Data are expressed as (). was considered significant compared with the control group.
(a)
(b)