Esterification of trans-aconitic acid improves its anti-inflammatory activity in LPS-induced acute arthritis
作者:Diego Pinto de Oliveira、Thales do Valle Moreira、Nathália Vieira Batista、José Dias de Souza Filho、Flávio Almeida Amaral、Mauro Martins Teixeira、Rodrigo Maia de Pádua、Fernão Castro Braga
DOI:10.1016/j.biopha.2018.01.009
日期:2018.3
tricarboxylic acid. We herein report the synthesis of TAA esters via Fischer esterification with ethanol, butanol and octanol. The reaction kinetics was investigated to produce mono-, di- and tri- derivatives. Mono- and diesters of TAA were obtained as a mixture of positional isomers, whereas the triesters were recovered as pure compounds. The obtained esters were screened in a model of acute arthritis
反乌头酸(TAA)是Echinodorus grandiflorus(一种用于治疗巴西类风湿性关节炎的药用植物)的叶子中的丰富成分。探索酯化作为增加亲脂性和提高TAA(一种高极性三羧酸)的生物药物特性的策略。我们在此报告通过乙醇,正丁醇和正辛醇的费歇尔酯化反应合成TAA酯。研究了反应动力学以产生单,二和三衍生物。以位置异构体的混合物形式获得TAA的单酯和二酯,而三酯则以纯化合物形式回收。在通过在瑞士小鼠的膝关节中注射LPS诱导的急性关节炎模型中筛选所获得的酯。无论反应中使用的是哪种醇,二酯都是活性最高的化合物,而衍生物的生物活性通过增加酯化中所用醇的脂族链的长度而得到改善。通常,该酯显示出比TAA更高的效力。当以0.017-172.3μmol/ Kg的剂量口服给予小鼠时,TAA的二乙基,二正丁基和二正辛基酯可减少细胞浸入膝关节,尤其是中性粒细胞。该研究确定了TAA的二酯是类风湿关节炎和其他