Abstract:
:ADX88178 (1) has been recently developed as a potent positive allosteric modulator for metabotropic glutamate receptor 4 (mGluR4). The aim of this study was to develop [(11)C]1 as a novel positron emission tomography ligand and to evaluate its binding ability for mGluR4. Using stannyl precursor 3, [(11)C]1 was efficiently synthesized by introducing an [(11)C]methyl group into a pyrimidine ring via C-(11)C coupling and deprotection reactions, in 16±6% radiochemical yield (n=10). At the end of synthesis, 0.54-1.10GBq of [(11)C]1 was acquired with >98% radiochemical purity and 90-120GBq/μmol of specific activity. In vitro autoradiography and ex vivo biodistribution study in rat brains showed specific binding of [(11)C]1 in the cerebellum, striatum, thalamus, cerebral cortex, and medulla oblongata, which showed dose-dependent decreases by administration with multi-dose of unlabeled 1.
journal_name
Bioorg Med Chem Lettjournal_title
Bioorganic & medicinal chemistry lettersauthors
Fujinaga M,Yamasaki T,Nengaki N,Ogawa M,Kumata K,Shimoda Y,Yui J,Xie L,Zhang Y,Kawamura K,Zhang MRdoi
10.1016/j.bmcl.2015.12.008subject
Has Abstractpub_date
2016-01-15 00:00:00pages
370-374issue
2eissn
0960-894Xissn
1464-3405pii
S0960-894X(15)30325-5journal_volume
26pub_type
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