Synthesis and Characterization of a Biotinylated Multivalent Targeted Contrast Agent
作者:Serhat Gündüz、Anthony Power、Martin E. Maier、Nikos K. Logothetis、Goran Angelovski
DOI:10.1002/cplu.201402329
日期:2015.3
common commercial agents at the investigated high magnetic field (7 T). The capacity of the dendrimeric CA to bind to the target protein was confirmed by fluorescence measurements upon its treatment with NeutrAvidin-agarose gel or NeutrAvidin-coated microspheres and the results were compared with those of its monomeric analogue. The fluorescence intensity of monomer-treated targets was found to be greater
制备并表征了靶向蛋白抗生物素蛋白的新型双峰多价树突状造影剂(CA)。三方赖氨酸核心用于连接配体生物素,荧光染料和带有GdDOTA的树枝状分子(DOTA = 1,4,7,10-四氮杂环十二烷-1,4,7,10-四乙酸)螯合物,用于扩增GdDOTA。磁共振成像(MRI)信号。在研究的强磁场(7 T)下,该树枝状CA的纵向弛豫性大于其GdDOTA螯合物和大多数常见的商业试剂的纵向弛豫。通过用NutrAvidin-琼脂糖凝胶或NeutrAvidin包被的微球处理后,通过荧光测量证实了树状CA结合目标蛋白的能力,并将结果与其单体类似物进行了比较。发现用单体处理的靶的荧光强度要大于用树枝状CA处理的靶的荧光强度。然而,在用树枝状CA处理的相同样品上观察到MRI信号增加了几倍。消解样品的电感耦合等离子体质谱分析表明,Gd3 +含量略高,因此单体CA与树枝状CA的结合稍好。这种双峰多价靶向探针为制备新