Figure 4.
Dysregulation of the oxidative phosphorylation pathway. (A) IPA analysis showing dysregulated genes involved in oxidative phosphorylation and mitochondrial dysfunction pathways for Au-20-NH3+ NPs (15 µg/mL). The schematic figure illustrates complex I-V of the mitochondrial electron transport chain90. (green, downregulated; red, upregulated). Data were analyzed through the use of IPA (QIAGEN Inc., www.qiagenbioinformatics.com/products/ingenuity-pathway-analysis). (B) Selected examples of dysregulated genes belonging to the oxidative phosphorylation and mitochondrial dysfunction pathways. Cytochrome c (CYT C) is a small heme protein that transfers electrons between complexes III (Coenzyme Q–Cyt C reductase) and IV (Cyt C oxidase). NDUFAF3 (NADH:ubiquinone oxidoreductase complex assembly factor 3) encodes a mitochondrial complex I assembly protein that interacts with complex I subunits. Mutations in this gene cause mitochondrial complex I deficiency, a fatal neonatal disorder. SOD2 encodes mitochondrial superoxide dismutase. Refer to Supplementary Fig. S2 for further examples of dysregulated genes linked to oxidative phosphorylation.