Synthesis and in vitro biological evaluation of carbon-11-labeled quinoline derivatives as new candidate PET radioligands for cannabinoid CB2 receptor imaging
作者:Mingzhang Gao、Min Wang、Kathy D. Miller、Gary D. Hutchins、Qi-Huang Zheng
DOI:10.1016/j.bmc.2010.02.011
日期:2010.3
family of potential antitumor agents, and cannabinoid receptor 2 (CB2) is believed to be over-expressed in tumor cells. This study was designed to develop new radioligands for imaging of CB2 receptor in cancer using biomedical imaging technique positron emission tomography (PET). Carbon-11-labeled 2-oxoquinoline and 2-chloroquinoline derivatives, [11C]6a–d and [11C]9a–d, were prepared by O-[11C]methylation
最近有人提出将大麻素作为潜在的抗肿瘤药物的新家族,并且认为大麻素受体2(CB2)在肿瘤细胞中过表达。这项研究旨在利用生物医学成像技术正电子发射断层扫描(PET)开发用于癌症中CB2受体成像的新型放射性配体。碳11标记的2-氧喹啉和2-氯喹啉衍生物[ 11 C] 6a - d和[ 11 C] 9a - d是通过使用[ 11 C] CH对相应的前体进行O- [ 11 C]甲基化制备的3OTf在基本条件下并通过简化的固相萃取(SPE)方法进行分离,以[ 11 C] CO 2为基础,以40%至50%的放射化学收率进行了分离,并将衰变校正为轰击结束(EOB)。EOB的总合成时间为15–20分钟,放射化学纯度> 99%,合成结束时的比活(EOS)为111–185 GBq /μmol。放射性配体结合试验表明,化合物6f,6b和9f表现出强大的体外结合亲和力,纳摩尔摩尔K i值,对CB2的选择性至少100-2000倍。