Design, Radiosynthesis, and Evaluation of New Fluorinated Analogs of MeDAS for Myelin PET Imaging
作者:Sébastien Beuché、Marie-Anne Peyronneau、Benoit Jego、Caroline Denis、Paul Bourbon、Capucine Chauvière、Cyrille Santerre、Charles Truillet、Bertrand Kuhnast、Fabien Caillé
DOI:10.1021/acs.jmedchem.3c00325
日期:2023.6.22
multiple sclerosis, monitor its evolution, and support drug development. Radiotracers based on N,N-dimethylaminostilbene (MeDAS) fluorinated analogs have been designed for myelin PET imaging but were never translated to humans. We have synthesized three original fluorinated analogs of MeDAS with low metabolic rates for which binding to myelin in a healthy rat brain was demonstrated by fluorescence microscopy
髓鞘的正电子发射断层扫描 (PET) 成像是研究多发性硬化症、监测其演变和支持药物开发的强大工具。基于N,N-二甲氨基芪 (MeDAS) 氟化类似物的放射性示踪剂已设计用于髓磷脂 PET 成像,但从未应用于人类。我们合成了三种具有低代谢率的原始 MeDAS 氟化类似物,通过荧光显微镜证明其与健康大鼠大脑中的髓磷脂结合。合成了先导化合物 PEGMeDAS 的甲苯磺酰前体,并提供了自动氟 18 放射性标记 [ 18F]PEGMeDAS 的放射化学产率为 25 ± 5%,摩尔活性为 102 ± 15 GBq/μmol。健康大鼠的生物分布表明,放射性代谢物的大脑渗透性较低。然而,在血浆中观察到的E到Z异构化阻碍了对该分子家族的进一步研究,并且需要有关Z异构体体内行为的补充数据。