HeLa cells expressing GFP-LC3 were treated with DMSO, 200 µM H2O2, or 4 mM 3-NPA for 2 h. Cells were stained with anti-Tom20 and anti-DNA antibodies, then analyzed by confocal microscopy. The white arrows were indicated the LC3 punta colocalizing or contacting with mtDNA/Tom20. Scale bar, 10 µm. Quantification of the LC3 punta colocalizing or contacting with mtDNA/Tom20 in a cell. n = 30 cells from 3 coverslips, Data are presented as mean ± SD (n = 30), statistical significance was assessed by a one-way ANOVA with Tukey's multiple comparisons test, ***p < 0.001. 