Modulating lipophilicity of rohitukine via prodrug approach: Preparation, characterization, and in vitro enzymatic hydrolysis in biorelevant media
作者:Vikas Kumar、Sonali S. Bharate、Ram A. Vishwakarma
DOI:10.1016/j.ejps.2016.07.010
日期:2016.9
promoieties. Hexanoyl ester prodrug of rohitukine, 3d, was stable under chemical conditions; however it was completely hydrolyzed to rohitukine, in plasma and in esterase in 4h. Hexanoate ester 3d appeared to be the most promising prodrug as it remained intact at gastric/intestinal pH and was completely transformed to the parent compound in plasma as desired for an ideal prodrug. The data presented herein
Rohitukine是医学上重要的天然产物,它激发了两种抗癌临床候选物的发现。Rohitukine本质上具有高度亲水性,因而妨碍了其口服生物利用度。因此,在本文中,我们的目的是通过前药策略改善罗希他汀的类药物性质。合成了各种酯前药,并研究了它们在血浆/酯酶中的溶解度,亲脂性,化学稳定性和酶促水解作用。与罗希他宁相比,所有前药均显示出较低的水溶性和改善的亲脂性,这符合药物发现中化合物的标准。在不同pH,SGF,SIF,大鼠血浆和酯酶中的缓冲液中评估了合成前药的稳定性。在所有温育介质中的水解速率主要取决于酰基部分。3d的rohitukine己酰酯前药在化学条件下稳定;然而,它在4小时内在血浆和酯酶中被完全水解为罗基图宁。己酸酯3d似乎是最有前途的前药,因为它在胃/肠pH值下保持完整,并根据理想前药的需要在血浆中完全转化为母体化合物。本文提供的数据将有助于设计将来在结构相似的化学型中具有所需理化