Fig. 3.
Mitochondrial matrix accumulation is required for MitoSOX inhibition of uncoupled respiration. In A, primary rat cortical neurons were treated with FCCP plus pyruvate (FCCP+pyr, 5 μM and 10 mM, respectively, first arrow), followed by vehicle control (con, filled circles) or MitoSOX (10 μM, open circles), and finally with a combination of rotenone (rot, 1 μM) and antimycin A (AA, 1 μM). In B, neurons in other wells on the same plate were first treated with MitoSOX or vehicle control, then with FCCP+pyr and rot+AA. Results in A and B are mean ± SD (n=3 wells) and are representative of two independent experiments. OCR is baseline-normalized to the point immediately prior to the first addition.