A Novel 18F Labelled Imidazo-oxazolopyridine Derivative as b-Amyloid Imaging Agent: Synthesis and Preliminary Evaluation
摘要:
脑内b淀粉样斑块的可视化对于阿尔茨海默病(AD)的诊断至关重要。在本研究中,我们设计、合成并评估了一种咪唑并[1,2-a]吡啶并[4,5-b]吡啶并[4,5-b]吡啶并[4,5-b]吡啶类衍生物2-[2-(4-氟苯)咪唑并[1,2-a]吡啶-6-基]并[4,5-b]吡啶(FPIPOP)作为正电子发射断层成像(PET)显像的候选化合物,用于成像A42斑块。FPIPOP与A42细丝的分子对接预测其具有良好的亲和力。目标化合物以高化学产率和易于重复的步骤合成。在以硫磺素S为竞争配体的试验中,FPIPOP显示了对A42聚集物良好的亲和力(Ki=27.18 ±4.7 nM)。在正常斯普拉格多列大鼠PET实验中,静脉注射后大脑皮层的脑内摄取率高,活性清除迅速(1 min 时[18F]FPIPOP为2.6%ID/g,60 min 时为0.8%ID/g)。[18F]FPIPOP在注射后60 min 脑中仍有76.4%的完整性。放射性在最大摄取量和60 min 时的比值,纹状体为20.5,海马为26.4,小脑为33.1。这些结果表明,FPIPOP 衍生物具有良好的体内药代动力学特性和对b淀粉样斑块的亲和力;但在此类骨架在转基因(Tg)小鼠模型中进行临床前评估之前,还需要进一步优化。
A radiotracer, [18F]–NA3BF3, capable of the mapping of aldehydic load by positron emission tomography is developed, based on the rapid, catalyst-free conjugation of aldehydes byN-aminoanthranilic acid.
5-arylsulfonyl indoles useful for treating disease
申请人:Pharmacia & Upjohn Company
公开号:US06565829B2
公开(公告)日:2003-05-20
The invention provides derivatives of 5-arylsulfonyl indole and 5-arylsulfonyl indoline compounds which may be in the form of pharmaceutical acceptable salts or compositions that are useful in treating central nervous system diseases such as anxiety and depression. The invention also includes intermediates and processes to make the compounds, isotopically-labeled forms of the compounds and the use of the isotopically labeled forms of the compounds to perform nuclear magnetic resonance imaging and positron emission tomography.
Purpose Stimulator of interferongenes (STING) protein plays a vital role in the immune surveillance of tumor microenvironment. Monitoring STING expression in tumors benefits the relevant STING therapy. This study aimed to develop a novel 18F-labeled agonist, dimeric amidobenzimidazole (diABZI), and firstly evaluate the feasibility of noninvasive positron emission tomography (PET) imaging of STING expression