Amide derivatives of Gallic acid: Design, synthesis and evaluation of inhibitory activities against in vitro α-synuclein aggregation
作者:Li Chen、Guo-Long Huang、Ming-Huan Lü、Yun-Xiao Zhang、Ji Xu、Su-Ping Bai
DOI:10.1016/j.bmc.2020.115596
日期:2020.8
Gallic acid (GA), a natural phenolic acid, has received numerous attention because of its anti-oxidative, anti-inflammatory, and anti-cancer activity. More importantly, GA can act as an efficient inhibitor of alpha-Synuclein (alpha-Syn) aggregation at early stages. Nevertheless, some evidences suggest that GA is unlikely to cross the blood-brain barrier because of its high hydrophilicity. Hence, GA may not be considered as a promising candidate or entering brain and directly affecting the central nervous system. Accordingly, we have designed and synthesized a series of amide derivatives of GA, some of which possess appropriate lipophilicity and hydrophilicity with LogP (2.09-2.79). Meanwhile, these sheet-like conjugated compounds have good pi-electron delocalization and high ability of hydrogen-bond formation. Some compounds have shown better in vitro anti-aggregation activities than GA towards alpha-Syn, with IC50, down to 0.98 mu M. The valid modification strategy of GA is considered an efficient way to discover novel inhibitors of alpha-Syn aggregation.