Novel Radiotracers for Imaging the Serotonin Transporter by Positron Emission Tomography: Synthesis, Radiosynthesis, and in Vitro and ex Vivo Evaluation of <sup>11</sup>C-Labeled 2-(Phenylthio)araalkylamines
作者:Alan A. Wilson、Nathalie Ginovart、Mark Schmidt、Jeffery H. Meyer、Penny G. Threlkeld、Sylvain Houle
DOI:10.1021/jm000079i
日期:2000.8.1
evaluated as potential radiotracers for imaging the serotonin transporter (SERT) by positron emission tomography (PET). All four candidates display high affinity for SERT and low affinity for the dopamine or norepinephrine transporters using in vitro binding assays. Biodistribution studies in rats demonstrated that tail-vein injection of the (11)C-labeled radiotracers resulted in high brain uptake of radioactivity
一系列的四个2-(苯硫基)芳烷基胺已用(11)C进行了放射性标记,并被评估为通过正电子发射断层扫描(PET)对5-羟色胺转运蛋白(SERT)成像的潜在放射性示踪剂。使用体外结合测定法,所有四个候选物均显示出对SERT的高亲和力和对多巴胺或去甲肾上腺素转运蛋白的低亲和力。大鼠的生物分布研究表明,尾静脉注射(11)C标记的放射性示踪剂会导致脑部对放射性的高摄取,并优先分布在已知富含SERT的大脑区域(如下丘脑和丘脑)中。最有前途的候选人16在注射后1小时的下丘脑与小脑的比例为9:1,这表明高特异性结合非特异性结合。离体药理研究表明,在富含SERT的大脑区域摄取对SERT既是饱和的又是选择性的。测试的两种放射性示踪剂15和16具有对SERT成像非常有利的特性,并将用于人类PET成像试验研究。