Effects of tetrahydropterines on the generation of quinones catalyzed by tyrosinase
Tetrahydrobiopterine (6BH4) can diminish the oxidative stress undergone by keratinocytes and melanocytes by reducing the o-quinones generated by the oxidation of the corresponding o-diphenols. We found that 6BH4 and their analogs reduced all the o-quinones studied. The formal potentials of different quinone/diphenol pairs indicate that the o-quinones with withdrawing groups are more potent oxidants than those with donating groups.
Garcia-Molina, Francis,Munoz-Munoz, Joseph Louis,Martinez-Ortiz, Francis,Tudela, Joseph,Garcia-Canovas, Francis,Rodriguez-Lopez, Joseph Neptune
scheme or table
p. 1108 - 1109
(2011/05/04)
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