Automated radiosynthesis of [18F]SPA-RQ for imaging human brain NK1 receptors with PET
作者:Frederick T. Chin、Cheryl L. Morse、H. Umesha Shetty、Victor W. Pike
DOI:10.1002/jlcr.1016
日期:2006.1
[18F]SPA-RQ is an effective radioligand for imaging brain neurokinin type-1 (NK1) receptors in clinical research and drug discovery with positron emission tomography. For the automated regular production of [18F]SPA-RQ for clinical use in the USA under an IND we chose to use a modified commercial synthesis module (TRACERlab FXF-N; GE Medical Systems) with an auxiliary custom-made robotic cooling–heating reactor, after evaluating several alternative radiosynthesis conditions. The automated radiosynthesis and its quality control are described here. [18F]SPA-RQ was regularly obtained within 150 min from the start of radiosynthesis in high radiochemical purity (>99%) and chemical purity and with an overall decay-corrected radiochemical yield of 15±2% (mean±S.D.; n=10) from cyclotron-produced [18F]fluoride ion. The specific radioactivity of [18F]SPA-RQ at the end of synthesis ranged from 644 to 2140 mCi/µmol (23.8–79.2 GBq/µmol). Copyright © 2005 John Wiley & Sons, Ltd.
[18F]SPA-RQ是一种有效的放射性配体,可用于正电子发射断层扫描(PET)成像脑中的神经激肽1型(NK1)受体,广泛应用于临床研究和药物发现。为了在美国根据新药临床试验(IND)的要求进行[18F]SPA-RQ的自动化常规生产,我们选择了一个改进的商业合成模块(TRACERlab FXF-N;GE医疗系统),并配备了一个定制的辅助机器人冷却加热反应器,经过对几种替代放射合成条件的评估后决定使用该设备。这里描述了自动化放射合成及其质量控制。在放射合成开始后150分钟内,我们定期获得[18F]SPA-RQ,其放射化学纯度高于99%、化学纯度良好,总体衰变校正后的放射化学产率为15±2%(平均±标准差;n=10),源自回旋加速器生产的[18F]氟离子。在合成结束时,[18F]SPA-RQ的比活度范围为644至2140 mCi/µmol(23.8–79.2 GBq/µmol)。版权©2005 John Wiley & Sons, Ltd.