A <i>p</i>-[<sup>18</sup>F]Fluoroethoxyphenyl Bicyclic Nucleoside Analogue as a Potential Positron Emission Tomography Imaging Agent for Varicella-Zoster Virus Thymidine Kinase Gene Expression
作者:Satish K. Chitneni、Christophe M. Deroose、Jan Balzarini、Rik Gijsbers、Sofie Celen、Zeger Debyser、Luc Mortelmans、Alfons M. Verbruggen、Guy M. Bormans
DOI:10.1021/jm700971p
日期:2007.12.27
We recently reported a new positron emission tomography (PET) reporter gene, namely, varicella-zoster virus thymidine kinase (VZV-tk) in combination, with carbon-11 or fluorine-18 labeled m-alkoxyphenyl bicyclic nucleoside analogues (BCNAs) as PET reporter probes. We now report the synthesis and evaluation of p-alkoxyphenyl-BCNA tracers ([11C]-4 and [18F]-5), which are found to be superior to the m-alkoxyphenyl-BCNA
我们最近报道了一个新的正电子发射断层扫描(PET)报告基因,即水痘-带状疱疹病毒胸苷激酶(VZV-tk)与碳11或氟18标记的间烷氧基苯基双环核苷类似物(BCNA)组合使用记者调查。现在,我们报告了对-烷氧基苯基-BCNA示踪剂的合成和评估([11C] -4和[18F] -5),发现它们优于间烷氧基苯基-BCNA示踪剂。特别是,氟18标记的示踪剂([18F] -5,IC50为4.2 microM)在VZV-tk表达细胞中比以前报道的间甲氧基苯基BCNA显示更高的积累。通过将苯酚前体3分别与作为烷基化剂的11CH 3I和18FCH 2CH 2Br加热来合成[11C] -4和[18F] -5。在293T细胞中对[11C] -4和[18F] -5进行的体外评估显示,其摄取量增加了约14倍和54倍,与对照细胞相比,它们分别进入了VZV-tk基因转导的细胞。LC-MS分析证实,VZV TK催化形成5