Design and Synthesis of γ- and δ-Lactam M<sub>1</sub> Positive Allosteric Modulators (PAMs): Convulsion and Cholinergic Toxicity of an M<sub>1</sub>-Selective PAM with Weak Agonist Activity
作者:Jennifer E. Davoren、Michelle Garnsey、Betty Pettersen、Michael A. Brodney、Jeremy R. Edgerton、Jean-Philippe Fortin、Sarah Grimwood、Anthony R. Harris、Stephen Jenkinson、Terry Kenakin、John T. Lazzaro、Che-Wah Lee、Susan M. Lotarski、Lisa Nottebaum、Steven V. O’Neil、Michael Popiolek、Simeon Ramsey、Stefanus J. Steyn、Catherine A. Thorn、Lei Zhang、Damien Webb
DOI:10.1021/acs.jmedchem.7b00597
日期:2017.8.10
series, compound 1 (PF-06827443), is a potent, low-clearance, orally bioavailable, and CNS-penetrant M1-selective PAM with minimal agonist activity. Compound 1 was tested in dose escalation studies in rats and dogs and was found to induce cholinergic AEs and convulsion at therapeutic indices similar to previous compounds with more agonist activity. These findings provide preliminary evidence that positive
最近的数据表明,亚型选择性正变构调节剂(PAM)对毒蕈碱M 1受体的激活有助于先前归因于M 2和M 3激活的胃肠道(GI)和心血管(CV)胆碱能不良事件(AE)。这些研究是使用也表现出变构激动剂活性的PAM进行的,这有可能通过变构激动而不是变构调节直接激活可能是造成不良反应的原因。本文介绍了解决这一假设的内酰胺衍生的M 1 PAM的设计和合成。该系列的先导分子,化合物1(PF-06827443)是一种有效的,清除率低,口服可生物利用的且具有最小激动剂活性的CNS渗透性M 1选择性PAM。在大鼠和狗的剂量递增研究中对化合物1进行了测试,发现化合物1的胆碱能AE和惊厥的治疗指数与以前的具有更高激动剂活性的化合物相似。这些发现提供了初步的证据,即M 1的正构构调制足以引起胆碱能AE。