Finding Potent Sirt Inhibitor in Coffee: Isolation, Confirmation and Synthesis of Javamide-II (N-Caffeoyltryptophan) as Sirt1/2 Inhibitor
作者:Jae B. Park
DOI:10.1371/journal.pone.0150392
日期:——
potential Sirt inhibitors were screened using coffee extract. First, HPLC was utilized to fractionate coffee extract, then screened using a Sirt1/2 inhibition assay. The screening led to the isolation of a potent Sirt1/2 inhibitor, whose structure was determined as javamide-II (N-caffeoyltryptophan) by NMR. For confirmation, the amide was chemically synthesized and its capacity of inhibiting Sirt1/2 was
最近的研究表明,抑制Sirt可能对几种人类疾病(例如神经退行性疾病和癌症)产生有益作用。咖啡是最受欢迎的饮料之一,对健康有积极影响。因此,在本文中,使用咖啡提取物筛选了潜在的Sirt抑制剂。首先,利用HPLC分离咖啡提取物,然后使用Sirt1 / 2抑制试验进行筛选。筛选导致分离出有效的Sirt1 / 2抑制剂,其结构经NMR确定为javamide-II(N-咖啡因色氨酸)。为了确认,化学合成了酰胺,并将其抑制Sirt1 / 2的能力与分离的酰胺进行了比较。Javamide-II抑制Sirt2(IC50; 8.7μM)优于Sirt1(IC50;34μM)。由于javamide-II比Sirt1对Sirt2的抑制作用更强。针对Sirt2进行了动力学研究。酰胺对NAD +表现出非竞争性Sirt2抑制作用(Ki = 9.8μM),对肽底物表现出竞争性抑制作用(Ki = 5.3μM)。而且,对接模