Nicotinic acetylcholine receptors are widely distributed throughout the human brain and are believed to play a role in several neurological and psychiatric disorders. In order to identify an effective PET radioligand for in vivo assessment of the α4β2 subtype of nicotinic receptor, we synthesized [18F]3-[1-(3-fluoropropyl)-(S)-pyrrolidin-2-ylmethoxy]pyridine (NicFP). The in vitro KD of NicFP was determined to be 1.1 nM, and the log P value obtained by HPLC analysis of the unlabelled standard was found to be 2.2. The radiosynthesis of [18F]NicFP was carried out by a nucleophilic substitution reaction of anhydrous [18F]fluoride and the corresponding mesylate precursor. After purification by HPLC, the radiochemical yield was determined to be 11.3±2.1% and the specific activity was 0.47±0.18 Ci/μmol (EOS, n = 3). The time of synthesis and purification was 99±2 min. The final product was prepared as a sterile saline solution suitable for in vivo use. Copyright © 2003 John Wiley & Sons, Ltd.
烟碱乙酰胆碱受体广泛分布于人脑中,被认为在多种神经和精神疾病中发挥作用。为了找到一种有效的 PET 放射
配体用于体内评估
烟碱受体的 α4β2 亚型,我们合成了 [18F]3-[1-(3-fluoropropyl)-(S)-pyrrolidin-2-ylmethoxy]pyridine (NicFP)。经测定,[18F]3-[1-(3-
氟丙基-(S-
吡咯烷-2-基甲氧基)]
吡啶(NicFP)的体外 KD 为 1.1 nM,通过 HPLC 分析未标记的标准品得出的对数 P 值为 2.2。[18F]NicFP 的放射合成是通过无
水[18F]
氟化物和相应的
甲磺酸盐前体的亲核取代反应进行的。经高效
液相色谱纯化后,测定的放射
化学收率为 11.3±2.1%,比活度为 0.47±0.18 Ci/μmol(EOS,n = 3)。合成和纯化时间为 99±2 分钟。最终产品制备成适合体内使用的无菌生理盐
水溶液。Copyright © 2003 John Wiley & Sons, Ltd. All Rights Reserved.