Synthesis and pre-clinical evaluation of a potential radiotracer for PET imaging of the dopamine D3 receptor

作者: Megan N. Stewart , Xia Shao , Timothy J. Desmond , Taylor J. Forrest , Janna Arteaga

DOI: 10.1039/C8MD00094H

关键词: ChemistryReceptorRadiosynthesisBiophysicsPositron emission tomographyPreclinical imagingLigand (biochemistry)Ex vivoDopamine receptor D2Dopamine receptor D3

摘要: There is considerable interest in using positron emission tomography (PET) imaging to understand the function of dopamine D3 receptors. Due high sequence homology with D2 receptors, development D3-selective PET radiotracers has been challenging. In an effort overcome this issue, we report radiosynthesis a new selective ligand carbon-11 ([11C]1), and its initial preclincial evaluation as potential radiotracer for vivo [11C]1 was prepared via [11C]CO2 fixation 0.1% non-corrected radiochemical yield, good purity (>95%) specific activity (>2000 Ci mmol−1). exhibited binding receptors ex autoradiography experiments rat brain, but only 14-fold selectivity over which lower than 1400-fold value reported previously cell studies. Rodent revealed reasonable uptake areas brain known be rich

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