Synthesis and Amyloid Binding Properties of Rhenium Complexes: Preliminary Progress Toward a Reagent for SPECT Imaging of Alzheimer's Disease Brain
作者:Weiguo Zhen、Hogyu Han、Magdalena Anguiano、Cynthia A. Lemere、Cheon-Gyu Cho、Peter T. Lansbury
DOI:10.1021/jm990103w
日期:1999.7.1
This ligand complexes technetium(V) in its neutral oxo form. A biphenyl-containing building block was conjugated to the protected ligand, and the product was coupled to the relevant aromatic compounds. Rhenium oxo complexes, which are isosteric, but nonradioactive, analogues of the potential imaging agent technetium oxo complexes, were synthesized. These complexes bound to Abeta amyloid fibrils produced
阿尔茨海默氏病(AD)的明确诊断需要检测死后大脑中的淀粉样斑块。尽管纤维状淀粉样蛋白的量与死亡时症状的严重程度大致相关,但是淀粉样蛋白沉积,神经元丧失和认知能力下降之间的时间关系尚不清楚。为了阐明这种关系,需要一种定量测定脑淀粉样蛋白沉积的非侵入性实用方法。我们在这里描述了通过单光子计算机断层扫描成像来实现这一目标的策略的初始阶段。修饰淀粉样蛋白结合染料刚果红,使其与单胺-单酰胺双(硫醇)配体结合。该配体以中性羰基形式络合tech(V)。将含联苯的结构单元与受保护的配体缀合,并将产物与相关的芳族化合物偶联。合成了潜在的显像剂羰基配合物的等距但非放射性的羰基配合物。这些复合物与体外产生的Abeta淀粉样蛋白原纤维结合,并在AD脑切片中染色淀粉样蛋白斑块和血管淀粉样蛋白。