Synthesis and in vitro/in vivo pharmacological evaluation of [11C]-ThioABP, a novel radiotracer for imaging mGluR5 with PET
作者:Selena Milicevic Sephton、Linjing Mu、Adrienne Müller、Cindy A. Wanger-Baumann、Roger Schibli、Stefanie D. Krämer、Simon M. Ametamey
DOI:10.1039/c2md20332d
日期:——
We have designed a novel positron emission tomography (PET) radiotracer, [11C]-ThioABP, a thiazole based derivative for imaging the metabotropic glutamate receptor subtype 5 (mGluR5), and prepared the hydroxy oxime precursor 4 in a 15% overall yield. [11C]-ThioABP was radiosynthesized in the Veenstra module and obtained in a decay corrected radiochemical yield of 40% and specific activity of 80–250
我们设计了一种新颖的正电子发射断层扫描(PET)放射性示踪剂[ 11 C] -ThioABP,一种基于噻唑的衍生物,用于对代谢型谷氨酸受体亚型5(mGluR5)进行成像,并以15%的总产率制备了羟基肟前体4。[ 11 C] -ThioABP在Veenstra模块中进行了放射性合成,在合成结束时,经衰减校正的放射化学产率为40%,比活度为80-250 GBqμmol -1。ThioABP在体外表现出出色的结合亲和力(K i),为1.9±0.9 nM,[ 11 C] -ThioABP显示出最佳的log D 7.4的2.4。在大鼠脑切片上的放射自显影研究显示出与mGluR5的特异性结合。[ 11 C] -ThioABP的体内评估(包括在动态PET扫描中使用MMPEP进行的置换研究)显示[ 11 C] -ThioABP对mGluR5的特异性。Radio-TLC代谢产物研究显示[ 11 C] -Th