A New Highly Deuterated [<sup>18</sup>F]AV-45, [<sup>18</sup>F]D15FSP, for Imaging β-Amyloid Plaques in the Brain
作者:Hao Xiao、Seok Rye Choi、Ruiyue Zhao、Karl Ploessl、David Alexoff、Lin Zhu、Zhihao Zha、Hank F. Kung
DOI:10.1021/acsmedchemlett.1c00062
日期:2021.7.8
(florbetapir f18, Amyvid) is an FDA-approved PET imaging agent targeting Aβ plaques in the brain for diagnosis of Alzheimer’s disease (AD). Its metabolites led to a high background in the brain and large bone uptake of [18F]F–, produced from dealkylation of the PEG chain. To slow down the in vivo metabolism, we report the design, synthesis, and evaluation of a highly deuterated derivative, [18F]D15FSP
[ 18 F]AV-45 (florbetapir f18, Amyvid) 是 FDA 批准的一种 PET 显像剂,靶向大脑中的 Aβ 斑块,用于诊断阿尔茨海默病 (AD)。其代谢物导致大脑中的高背景和大量骨摄取 [ 18 F]F –,这是由 PEG 链的脱烷基化产生的。为了减缓体内代谢,我们报告了高度氘代衍生物 [ 18 F]D15FSP 的设计、合成和评估,并将其与N-甲基氘代 [ 18 F]D3FSP 和非氘代 [ 18 F]AV进行了比较-45。D15FSP 对 Aβ 聚集体表现出优异的结合亲和力 ( K i = 7.52 nM)。[ 18 ] 的体外放射自显影F]D15FSP、[ 18 F]D3FSP 和 [ 18 F]AV-45 在人类 AD 脑切片中显示出与 Aβ 斑块的出色结合。生物分布研究显示,与 [ 18 F]D3FSP 和 [ 18 F]AV-45相比, [ 18 F]D15FSP在