Cutaneous NAD(P)H: quinone reductase: a xenobiotica-metabolizing enzyme with potential cancer and oxidation stress-protecting properties.


The toxicity of quinones--including certain chemotherapeutic agents such as doxorubicin--have been related to the enzymatic or nonenzymatic formation of the corresponding semiquinones and their subsequent reaction with molecular oxygen yielding superoxide anion radicals by spontaneous regenerating of the quinones. This semiquinone redox cycling is prevented… (More)


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