Synthesis, pH dependent, plasma and enzymatic stability of bergenin prodrugs for potential use against rheumatoid arthritis
作者:Rohit Singh、Vikas Kumar、Sonali S. Bharate、Ram A. Vishwakarma
DOI:10.1016/j.bmc.2017.08.011
日期:2017.10
plasma/esterase. The stability of synthesized prodrugs was evaluated in buffers at different pH, in biorelevant media such as SGF, SIF, rat plasma and in esterase enzyme. All prodrugs displayed significantly improved lipophilicity compared with bergenin, which was in accordance with the criteria of drug-like compounds. Acetyl ester 4a2 appeared to be the most promising prodrug as it remained stable at gastric/intestinal
卑尔根是一个独特的C-糖苷天然产物具有抗炎和抗关节炎活性。它是亲水分子,在酸性条件下稳定,但是在中性碱性pH条件下不稳定。降解速率与pH值增加成正比,这可能是其口服生物利用度低的原因之一。因此,本文的目的是使用前药策略改善其稳定性。合成了各种酯和醚前药,并研究了它们在血浆/酯酶中的亲脂性,化学稳定性和酶促水解作用。在不同pH的缓冲液,生物相关培养基(如SGF,SIF,大鼠血浆和酯酶)中评估了合成前药的稳定性。所有的前药都显示出比bergenin显着改善的亲脂性,这符合类药物化合物的标准。乙酰酯4a 2似乎是最有前途的前药,因为它在胃/肠pH值下保持稳定,并根据理想前药的需要在血浆中完全转化为母体化合物bergenin。本文提供的数据将有助于设计结构相似的化学型中具有所需理化性质的不稳定分子的稳定前药。