作者:Hong Gao、Jun Nishida、Shizuka Saito、Jun Kawabata
DOI:10.3390/12010086
日期:——
Baicalein (1), 6-hydroxyapigenin (6), 6-hydroxygalangin (13) and 6-hydroxy-kaempferol (14), which are naturally occurring flavonoids from a set of 14 hydroxy-flavones tested, exhibited high inhibitory effects on tyrosinase with respect to L-DOPA,while each of the 5,6,7-trihydroxyflavones 1, 6, 13 or 14 acted as a cofactor tomonophenolase. Moreover, 6-hydroxykaempferol (14) showed the highest activity andwas a competitive inhibitor of tyrosinase compared to L-DOPA. 5,6,7-Trihydroxyflavones 1, 6, 13 or 14 showed also high antioxidant activities. Hence, weconclude that the 5,6,7-trihydroxy-flavones are useful as good depigmentation agentswith inhibitory effects in addition to their antioxidant properties.
从一组14种羟基黄酮中,天然存在的黄酮类化合物Baicalein(1)、6-羟基芹菜素(6)、6-羟基高良姜素(13)和6-羟基山柰酚(14)对酪氨酸酶关于L-多巴显示出高抑制效果,其中每一种5,6,7-三羟基黄酮1、6、13或14作为单酚酶的辅因子。此外,6-羟基山柰酚(14)表现出最高的活性,并且与L-多巴相比是酪氨酸酶的竞争性抑制剂。5,6,7-三羟基黄酮1、6、13或14也显示出高抗氧化活性。因此,我们得出结论,5,6,7-三羟基黄酮除了其抗氧化特性外,还具有良好的脱色素抑制效果,是有用的脱色素剂。