Structure-Activity Relationship of Bis-Galloyl Derivatives Related to (-)-Epigallocatechin Gallate
作者:Kosuke Dodo、Taro Minato、Yuichi Hashimoto
DOI:10.1248/cpb.57.190
日期:——
Green tea and (−)-epigallocatechin gallate (EGCG: one of main components of green tea) are well known to have preventive activities against human cancers. Previously, using a galloyl group as a core structure derived from EGCG, we developed alkyl gallate and gallamide derivatives, which showed strong antiproliferative activity towards human leukemia HL-60 cells by inducing apoptosis. Here, as a further structural development study, we planned to introduce an additional galloyl group into alkyl gallates and gallamides. According to this strategy, various bisgallate and bisgallamide derivatives were synthesized and tested for antiproliferative activity towards HL-60 cells. In gallamide derivatives having a short alkyl chain, the additional galloyl group enhanced the antiproliferative activity. In contrast, in the gallate derivatives, the additional galloyl group had no effect on the antiproliferative activity.
绿茶和(−)-表没食子酸没食子酯(EGCG:绿茶的主要成分之一)众所周知对人类癌症具有预防活性。之前,我们利用从EGCG衍生的没食子酰基作为核心结构,开发了烷基没食子酸酯和没食子酰胺衍生物,这些衍生物通过诱导细胞凋亡对人类白血病HL-60细胞表现出强的抗增殖活性。在这里,作为进一步的结构开发研究,我们计划在烷基没食子酸酯和没食子酰胺中引入额外的没食子酰基。根据这一策略,合成了多种双没食子酸酯和双没食子酰胺衍生物,并测试其对HL-60细胞的抗增殖活性。在具有短烷基链的没食子酰胺衍生物中,额外的没食子酰基增强了抗增殖活性。相反,在没食子酸酯衍生物中,额外的没食子酰基对抗增殖活性没有影响。