Anti-tyrosinase, antioxidant and antibacterial activities of gallic acid-benzylidenehydrazine hybrids and their application in preservation of fresh-cut apples and shrimps
作者:Zhiyun Peng、Yufeng Li、Lijun Tan、Lu Chen、Qiandai Shi、Qiao-Hui Zeng、Haiquan Liu、Jing Jing Wang、Yong Zhao
DOI:10.1016/j.foodchem.2022.132127
日期:2022.6
for their tyrosinase inhibitory activity. Thereinto, compounds 5d and 5f potently inhibited tyrosinase with IC50 of 15.3 and 3.3 μM, compared to kojic acid (44.4 μM). The inhibition mechanism suggested that 5d and 5f not only chelated with Cu2+, but also reduced Cu2+ to Cu1+ in the tyrosinase active site. Additionally, 5d and 5f exhibited strong DPPH scavenging and antibacterial activities against Vibrio
合成了一系列没食子酸-苯亚甲基肼杂化物并评估了它们的酪氨酸酶抑制活性。其中,化合物5d和5f有效抑制酪氨酸酶,与曲酸 (44.4 μM) 相比, IC 50为 15.3 和 3.3 μM。抑制机制表明5d和5f不仅与Cu 2+螯合,而且在酪氨酸酶活性位点将Cu 2+还原为Cu 1+。此外,5d和5f对副溶血性弧菌和金黄色葡萄球菌具有很强的 DPPH 清除和抗菌活性,这可以归因于没食子酸和腙部分的功能。这些化合物还表现出保存鲜切苹果和虾的能力。最后,5d和5f在人类细胞系 (HEK293) 中表现出低细胞毒活性。因此,这些化合物具有抗酪氨酸酶、抗氧化和抗菌活性,可用于开发新型食品防腐剂。