Rapid Identification of a Novel Small Molecule Phosphodiesterase 10A (PDE10A) Tracer
作者:Essa Hu、Ji Ma、Christopher Biorn、Dianna Lester-Zeiner、Robert Cho、Shannon Rumfelt、Roxanne K. Kunz、Thomas Nixey、Klaus Michelsen、Silke Miller、Jianxia Shi、Jamie Wong、Geraldine Hill Della Puppa、Jessica Able、Santosh Talreja、Dah-Ren Hwang、Stephen A. Hitchcock、Amy Porter、David Immke、Jennifer R. Allen、James Treanor、Hang Chen
DOI:10.1021/jm3002372
日期:2012.5.24
report the rapid identification of a novel phosphodiesterase 10A (PDE10A) tracer candidate using a LC–MS/MS technology. This structurally distinct PDE10A tracer, AMG-7980 (5), has been shown to have good uptake in the striatum (1.2% ID/g tissue), high specificity (striatum/thalamus ratio of 10), and saturable binding in vivo. The PDE10A affinity (KD) and PDE10A target density (Bmax) were determined to
放射性标记的示踪剂,用于在大脑中成像治疗靶标,是在中枢神经系统药物发现中进行铅优化和在临床开发中选择剂量的重要工具。我们报告了使用LC-MS / MS技术对新型磷酸二酯酶10A(PDE10A)示踪剂候选物的快速鉴定。这种结构独特的PDE10A示踪剂AMG-7980(5)已显示在纹状体中具有良好的摄取(1.2%ID / g组织),高特异性(纹状体/丘脑比例为10)和体内可饱和结合。使用[ 3 H] 5确定PDE10A亲和力(K D)和PDE10A目标密度(B max)分别为0.94 nM和2.3 pmol / mg蛋白。对大鼠纹状体匀浆。大鼠脑切片的放射自显影表明示踪信号与已知的PDE10A表达模式一致。[ 3 H] 5与大鼠脑的特异性结合被另一种在结构上不同的已发表的PDE10A抑制剂MP-10阻断。最后,使用LC-MS / MS技术,我们的示踪剂用于测量大鼠中PDE10A抑制剂在体内的PDE10A靶标占有率。