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Doughan AK, Dikalov SI: Mitochondrial redox cycling of mitoquinone leads to superoxide production and cellular apoptosis. Antioxid Redox Signal. 2007 Nov;9(11):1825-36.
We found that in a cell-free system with flavin-containing enzyme cytochrome P-450 reductase, MitoQ is a very efficient redox cycling agent and produced more superoxide compared with equal concentrations of menadione (10-1,000 nM). Inhibitor analysis suggested that the redox cycling of MitoQ occurred at two sites on complex I, proximal and distal to the rotenone-binding site. |
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