Synthesis and evaluation of [18F]Fluorobutyl ethacrynic amide: A potential PET tracer for studying glutathione transferase
作者:Ho-Lien Huang、Chun-Nan Yeh、Kang-Wei Chang、Jenn-Tzong Chen、Kun-Ju Lin、Li-Wu Chiang、Kee-Ching Jeng、Wei-Ting Wang、Ken-Hong Lim、Caleb Gonshen Chen、Kun-I Lin、Ying-Cheng Huang、Wuu-Jyh Lin、Tzu-Chen Yen、Chung-Shan Yu
DOI:10.1016/j.bmcl.2012.04.091
日期:2012.6
radiochemical conjugated product [18F]FBuEA–GSH, 85% and 5–16%, respectively. The catalytic selectivity of this tracer toward GST-alpha was addressed. Positron emission tomography (PET) imaging of [18F]FBuEA in normal rats showed that a homogeneous pattern of radioactivity was distributed in the liver, suggesting a catalytic role of GST. By contrast, PET images of [18F]FBuEA in rats with thioacetamide-induced
由甲苯磺酸前体甲苯磺酸N -Boc- N- [4-(甲苯磺酰氧基)丁基]乙炔酰胺制备[ 18 F]氟丁基乙酰胺([ 18 F] FBuEA),放射化学产率为3%,比活度为48 GBq /μmol,放射化学纯度为98%。在谷胱甘肽转移酶α(GST-α)和π的催化下,[ 18 F] FBuEA与谷胱甘肽(GSH)的化学偶联和酶偶联产生了约41%的放射化学偶联产物[ 18 F] FBuEA–GSH ,分别为85%和5–16%。解决了该示踪剂对GST-α的催化选择性。[ 18的正电子发射断层扫描(PET)成像正常大鼠中的F] FBuEA显示肝脏中放射性分布均匀,表明GST具有催化作用。相比之下,硫代乙酰胺诱导的胆管癌大鼠的[ 18 F] FBuEA的PET图像显示了放射性蓄积的异质性模式,并在肿瘤病变中带有冷点。[ 18 F] FBuEA的PET成像可用于早期诊断具有低GST活性和肝功能的肝肿瘤。