Enhancing the Intestinal Membrane Permeability of Zanamivir: A Carrier Mediated Prodrug Approach
作者:Sheeba Varghese Gupta、Deepak Gupta、Jing Sun、Arik Dahan、Yasuhiro Tsume、John Hilfinger、Kyung-Dall Lee、Gordon L. Amidon
DOI:10.1021/mp200291x
日期:2011.12.5
and oral absorption of the poorly permeable anti-influenza agent, zanamivir. The poor oral bioavailability is attributed to the high polarity (cLogP ∼ −5) resulting from the polar and zwitterionic nature of zanamivir. In order to improve the permeability of zanamivir, prodrugs with amino acids were developed to target the intestinal membrane transporter, hPepT1. Several acyloxy ester prodrugs of zanamivir
本研究的目的是提高渗透性差的抗流感药物扎那米韦的膜渗透性和口服吸收。较差的口服生物利用度归因于扎那米韦的极性和两性离子性质导致的高极性(cLogP ∼ -5)。为了提高扎那米韦的渗透性,开发了具有氨基酸的前药以靶向肠膜转运蛋白 hPepT1。合成并表征了几种与氨基酸结合的扎那米韦的酰氧基酯前药。评估了前药在不同 pH 值的缓冲液中的化学稳定性以及酶的转运和组织活化。扎那米韦的酰氧基酯前药显示出竞争性抑制Caco-2 细胞中[ 3 H] Gly-Sar 摄取 (IC 50:扎那米韦的l-缬氨酰前药为1.19 ± 0.33 mM )。与野生型 HeLa 细胞相比,扎那米韦的l-缬氨酰前药在转染的 HeLa/hPepT1 细胞中表现出约 3 倍的摄取,这至少部分表明,载体介导了 hPepT1 转运蛋白的转运。此外,与母体药物相比,前药跨 Caco-2 单层的跨细胞渗透性增强(P app = 2.24