N-Monosubstituted Methoxy-oligo(ethylene glycol) Carbamate Ester Prodrugs of Resveratrol
作者:Andrea Mattarei、Michele Azzolini、Mario Zoratti、Lucia Biasutto、Cristina Paradisi
DOI:10.3390/molecules200916085
日期:——
Resveratrol is a natural polyphenol with many interesting biological activities. Its pharmacological exploitation in vivo is, however, hindered by its rapid elimination via phase II conjugative metabolism at the intestinal and, most importantly, hepatic levels. One approach to bypass this problem relies on prodrugs. We report here the synthesis, characterization, hydrolysis, and in vivo pharmacokinetic behavior of resveratrol prodrugs in which the OH groups are engaged in an N-monosubstituted carbamate ester linkage. As promoiety, methoxy-oligo(ethylene glycol) groups (m-OEG) (CH3–[OCH2CH2]n–) of defined chain length (n = 3, 4, 6) were used. These are expected to modulate the chemico-physical properties of the resulting derivatives, much like longer poly(ethylene glycol) (PEG) chains, while retaining a relatively low MW and, thus, a favorable drug loading capacity. Intragastric administration to rats resulted in the appearance in the bloodstream of the prodrug and of the products of its partial hydrolysis, confirming protection from first-pass metabolism during absorption.
白藜芦醇是一种具有多种有趣生物活性的天然多酚。然而,它在体内的药理利用受到其在肠道和肝脏(最重要的是)通过II相共轭代谢迅速消除的阻碍。一种绕过这一问题的方法依赖于前药。我们在这里报告了白藜芦醇前药的合成、表征、水解和体内药代动力学行为,其中OH基团参与了N-单取代氨基甲酸酯酯键。作为载体,使用了一系列定义链长(n=3、4、6)的甲氧基聚乙二醇(m-OEG)(CH3–[OCH2CH2]n–)。这些有望像较长的聚乙二醇(PEG)链一样,调节所得到的衍生物的化学物理性质,同时保留相对较低的分子量,从而具有良好的药物负载能力。对大鼠进行胃内给药,结果表明,血液中出现了前药及其部分水解产物,证实了在吸收过程中避免了首次通过代谢的保护。