Potent and selective mGlu1 receptor negative allosteric modulator (IC50 values are 5.8 and 6200 nM for mGlu1 and mGlu5 respectively). Also acts as an mGlu1 receptor inverse agonist (IC50 = 7 nM) in the absence of ligand. Exhibits no effect at group II/III mGlu receptors. Inhibits L-glutamate-induced increases in intracellular calcium in mGlu1-expressing CHO cells. Inhibits nociceptive behavior, and exhibits anxiolytic and antipsychotic effects in vivo. Orally active.

Suzuki et al (2007) Pharmacological characterization of a new, orally active and potent allosteric metabotropic glutamate receptor 1 antagonist, 4-[1-(2-fluoropyridin-3-yl)-5-methyl-1H-1,2,3-triazol-4-yl]-N-isopropyl-N-methyl-3,6-dihydropyridine-1( J.Pharmacol.Exp.Ther. 321 1144 PMID:17360958 |Ito et al (2008) Discovery and biological profile of 4-(1-aryltriazol-4-yl)-tetrahydropyridines as an orally active new class of metabotropic glutamate receptor 1 antagonist. Bioorg.Med.Chem. 16 9817 PMID:18849168 |Satow et al (2008) Pharmacological effects of the metabotropic glutamate receptor 1 antagonist compared with those of the metabotropic glutamate receptor 5 antagonist and metabotropic glutamate receptor 2/3 agonist in rodents: detailed investigations with a selective allost J.Pharmacol.Exp.Ther. 326 577 PMID:18487514