18F-Labeled o‑aminopyridyl alkynyl radioligands targeting colony-stimulating factor 1 receptor for neuroinflammation imaging
作者:Xiaodan An、Jingqi Wang、Linjiang Tong、Xiaojun Zhang、Hualong Fu、Jinming Zhang、Hua Xie、Yiyun Huang、Hongmei Jia
DOI:10.1016/j.bmc.2023.117233
日期:2023.4
0 ± 4.3% (n = 4, decay-corrected), with radiochemical purity of > 99% and molar activity of 9–12 GBq/μmol (n = 5) and 6–8 GBq/μmol (n = 4), respectively. In biodistribution studies, radioligands [18F]4 and [18F]5 showed moderate brain uptake in male ICR mice with 1.52 ± 0.15 and 0.91 ± 0.07% ID/g, respectively, at 15 min. Metabolic stability studies in mouse brain revealed that [18F]4 exhibited high
我们报告了五种邻氨基吡啶基炔基衍生物作为集落刺激因子 1 受体 (CSF-1R) 配体的设计、合成和评估。在苯环的间位或对位具有氟乙氧基的化合物4和5对 CSF-1R 具有纳摩尔抑制效力,IC 50值分别为 7.6 nM 和 2.3 nM。放射性配体 [ 18 F] 4和 [ 18 F] 5获得了 17.2 ± 5.3%(n = 5,衰变校正)和 14.0 ± 4.3%(n = 4,衰变校正)的放射化学产率,放射化学纯度 > 99%,摩尔活性为 9–12 GBq/ μmol (n = 5) 和 6–8 GBq/μmol (n = 4),分别。在生物分布研究中,放射性配体 [ 18 F] 4和 [ 18 F] 5在雄性 ICR 小鼠中表现出适度的脑摄取,在 15 分钟时分别为 1.52 ± 0.15 和 0.91 ± 0.07% ID/g。小鼠大脑中的代谢稳定性研究表明,[ 18 F] 4表现出高稳定性,而