Dopamine D3 receptor antagonists: The quest for a potentially selective PET ligand. Part 3: Radiosynthesis and in vivo studies
作者:Idriss Bennacef、Cristian A. Salinas、Thomas A. Bonasera、Roger N. Gunn、Hélène Audrain、Steen Jakobsen、Nabeel Nabulsi、David Weinzimmer、Richard E. Carson、Yiyun Huang、Ian Holmes、Fabrizio Micheli、Christian Heidbreder、Gabriella Gentile、Tino Rossi、Marc Laruelle
DOI:10.1016/j.bmcl.2009.07.055
日期:2009.9
Compound 1 is a potent and selective antagonist of the dopamine D-3 receptor. With the aim of developing a carbon-11 labeled ligand for the dopamine D-3 receptor, 1 was selected as a potential PET probe. [C-11]1 was obtained by palladium catalyzed cross coupling using [11C] cyanide and 4 with a specific activity of 55.5 +/- 25.9 GBq/mu mol (1.5 +/- 0.7 Ci/mu mol). [C-11]1 was tested in porcine and non-human primate models to assess its potential as a radioligand for PET imaging of the dopamine D-3 receptor. We conclude that in both species and despite appropriate in vitro properties, [C-11]1 does not show any specific signal for the dopamine D-3 receptor. (C) 2009 Elsevier Ltd. All rights reserved.