Synthesis and Preliminary Evaluation of
<sup>11</sup>
C‐Labeled VU0467485/AZ13713945 and Its Analogues for Imaging Muscarinic Acetylcholine Receptor Subtype 4
作者:Xiaoyun Deng、Akiko Hatori、Zhen Chen、Katsushi Kumata、Tuo Shao、Xiaofei Zhang、Tomoteru Yamasaki、Kuan Hu、Qingzhen Yu、Longle Ma、Gangqiang Wang、Lu Wang、Yihan Shao、Lee Josephson、Shaofa Sun、Ming‐Rong Zhang、Steven Liang
DOI:10.1002/cmdc.201800710
日期:2019.2.5
developed that target the topographically distinct allosteric sites. Herein we report the synthesis and preliminary evaluation of 11 C-labeled positron emission tomography (PET) ligands based on a validated M4 R positive allosteric modulator VU0467485 (AZ13713945) to facilitate drug discovery. [11 C]VU0467485 and two other ligands were prepared in high radiochemical yields (>30 %, decay-corrected) with high
毒蕈碱型乙酰胆碱受体(mAChRs)具有五个不同的亚基(M1-M5),并参与中枢神经系统和周围神经系统中神经递质乙酰胆碱的作用。归因于在精神分裂症和阿尔茨海默氏病患者中Xanomeline(一种M1 / M4激动剂)的有希望的临床疗效,已经开发出了M1或M4选择性mAChR调节剂,其靶向地形不同的变构位点。本文中,我们基于经过验证的M4 R阳性变构调节剂VU0467485(AZ13713945)报告11 C标记的正电子发射断层扫描(PET)配体的合成和初步评估,以促进药物发现。[11 C] VU0467485和其他两个配体以高放射化学收率(> 30%,经过衰减校正)和高放射化学纯度(> 99%)和高摩尔活性(> 74 GBqμmol-1)。体外放射自显影研究表明,这三种配体对M4 R具有中等至高的体外特异性结合。尽管如此,进一步的理化性质优化对于克服与有限的脑通透性相关的挑战是必要的。