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.
四氢
生物蝶呤(6BH4)可以通过减少相应的邻二
酚氧化产生的邻醌来减轻角质细胞和
黑色素细胞所承受的氧化压力。我们发现,6BH4 及其类似物可以还原所研究的所有邻
醌类化合物。不同醌/二
酚对的形式电位表明,具有抽离基团的邻醌比具有捐赠基团的邻醌具有更强的氧化作用。