Improvement of Cell Permeability of Human Neuronal Nitric Oxide Synthase Inhibitors Using Potent and Selective 2-Aminopyridine-Based Scaffolds with a Fluorobenzene Linker
作者:Ha T. Do、Heng-Yen Wang、Huiying Li、Georges Chreifi、Thomas L. Poulos、Richard B. Silverman
DOI:10.1021/acs.jmedchem.7b01356
日期:2017.11.22
Inhibition of neuronal nitric oxide synthase (nNOS) is a promising therapeutic approach to treat neurodegenerative diseases. Recently, we have achieved considerable progress in improving the potency and isoform selectivity of human nNOS inhibitors bearing a 2-aminopyridine scaffold. However, these inhibitors still suffered from too low cell membrane permeability to enter into CNS drug development.
抑制神经元一氧化氮合酶(nNOS)是治疗神经退行性疾病的一种有前途的治疗方法。近来,我们在改善带有2-氨基吡啶支架的人nNOS抑制剂的效力和同工型选择性方面取得了相当大的进步。然而,这些抑制剂仍然具有太低的细胞膜通透性以至于不能参与CNS药物开发。我们在此报告我们的研究,以通过PAMPA–BBB和Caco-2分析来提高nNOS抑制剂的通透性。这项研究中最具渗透性的化合物(12)仍保留了与人nNOS(K i= 30 nM)和对其他NOS亚型,特别是人类eNOS的很高的选择性(hnNOS / heNOS = 2799,迄今为止我们获得的最高hnNOS / heNOS比值)。X射线晶体学分析表明12在大鼠和人的nNOS中采用相似的结合模式,其中2-氨基吡啶和氟苯连接子分别与谷氨酸和酪氨酸残基形成关键的氢键。