Fig. 2From: Combined exposure to fine particulate matter and high glucose aggravates endothelial damage by increasing inflammation and mitophagy: the involvement of vitamin DPM aggravated ROS production in endothelial cells treated with high glucose, and 1,25(OH)2D3 pretreatment attenuated this change. HUVECs were pretreated with high glucose (30 mM) for 24 h and then treated with PM (50 μg/mL) for 8 h. Before exposure to PM, HUVECs were pretreated with 100 nM 1,25(OH)2D3 for 12 h. A Mitochondrial and cellular ROS levels were detected by staining HUVECs with MitoSOX Red, DHE and DCFDA and examining them under a fluorescence microscope. Bar = 50 μm. B Mitochondrial and cellular ROS levels were detected by staining HUVECs with MitoSOX Red, DHE and DCFDA and analyzed using flow cytometry. C HUVECs were pretreated with 5 μM 25(OH)D3, 50 or 100 nM 1,25(OH)2D3, 500 nM MitoTEMPO and 10 mM NAC (an ROS scavenger) for 12 h and 1 h, respectively. Mitochondrial ROS was detected using MitoSOX Red and a flow cytometer. D HUVECs were pretreated with 5 μM 25(OH)D3, 50 or 100 nM 1,25(OH)2D3, 500 nM MitoTEMPO and 10 mM NAC for 12 h and 1 h, respectively. The MTT assay was used to evaluate cell viability. E The levels of SOD1 and SOD2 expression were detected using Western blotting. *P < 0.05 compared with the control group; †P < 0.05 compared with the HG group; #P < 0.05 compared with the PM group; §P < 0.05 compared with the HG + PM groupBack to article page