Derivatives of 4,6-diamino-1,2-dihydro-2-phenyl-1,2,4-triazolo[4,3-a]quinoxalin-2H-1-one: potential antagonist ligands for imaging the A2A adenosine receptor by positron emission tomography (PET)
作者:Marcus H. Holschbach、Dirk Bier、Walter Wutz、Wiebke Sihver、M. Schüller、Ray A. Olsson
DOI:10.1016/j.ejmech.2004.12.005
日期:2005.5
in movement disorders urges the development of radiolabeled ligands for imaging those receptors by positron emission tomography (PET). This study evaluated one class of A(2A)AR antagonists, derivatives of 4-amino-6-benzylamino-1,2-dihydro-2-phenyl-1,2,4-triazolo[4,3-a]quinoxalin-2H-1-o ne, 10a, as agents for imaging brain A(2A)ARs by PET.. Modifications of a literature synthesis of 10a efficiently
脑A2A腺苷受体(A(2A)AR)在运动障碍中的重要性促使开发通过正电子发射断层扫描(PET)对这些受体成像的放射性标记配体。这项研究评估了一类A(2A)AR拮抗剂,即4-氨基-6-苄氨基-1,2-二氢-2-苯基-1,2,4-三唑[4,3-a]喹喔啉-2H的衍生物-1-o ne,10a,作为通过PET对大脑A(2A)ARs进行成像的试剂。对10a文献合成的修改有效地产生了用于药理学评估的类似物10b-s。放射性配体结合实验显示出在低纳摩尔范围内对大鼠脑A(2A)AR的亲和力,但对A1AR的亲和力和基本的非特异性结合却很相似。使用[3H] 10a的放射自显影显示高的非特异性结合使对A1AR和A(2A)AR的特异性结合变得模糊。因此,