A brain-penetrant, nonpeptidic, high-affinity, reversible, selective nociceptin receptor ORL-1 (ORL1) agonist that elicits anxiolytic-like effects in vivo.
Ro 64-6198 is a brain-penetrant, nonpeptidic, high-affinity (Ki = 0.389 nM against 0.1 nM OFQ for binding human ORL1) nociceptin/orphanin FQ (N/OFQ) receptor ORL-1 (KOR-3, NOP) agonist (EC50 = 38.9 nM by GTPγS binding assay; IC50 = 32.4 nM against forskolin-stimulated cellular cAMP accumulation) with >100-fold selectivity over other opioid receptor family members (Ki = 46.8 nM/μ, 89.1 nM/k, 1.38 μM/δ) and no significant affinity toward 48 other receptors and ion channels (IC50 >1 μM). Ro 64-6198 elicits ORL1-dependent anxiolytic-like effects in several rat models of spontaneous and conditioned anxiety states (0.3-3.2 mg/kg i.p) without antipanic, anticonvulsant, sedative, amnestic activity, or signs of tolerance to its anxiolytic-like effects following chronical dosing.
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Proceedings of the National Academy of Sciences of the United States of America, 97(9), 4938-4943 (2000-04-12)
The biochemical and behavioral effects of a nonpeptidic, selective, and brain-penetrant agonist at the ORL1 receptor are reported herein. This low molecular weight compound [(1S,3aS)-8- (2,3,3a,4,5, 6-hexahydro-1H-phenalen-1-yl)-1-phenyl-1,3,8-triaza- spiro[4. 5]decan-4-one] has high affinity for recombinant human ORL1 receptors and has 100-fold
The Journal of pharmacology and experimental therapeutics, 357(1), 17-23 (2016-01-24)
Nociceptin/orphanin FQ receptor (NOP) agonists have been reported to produce antinociceptive effects in rhesus monkeys with comparable efficacy to μ-opioid receptor (MOP) agonists, but without their limiting side effects. There are also known to be species differences between rodents and
The Journal of pharmacology and experimental therapeutics, 298(2), 812-819 (2001-07-17)
The novel nonpeptide orphanin FQ/nociceptin (OFQ/N) ligand [(1S,3aS)-8-(2,3,3a,4,5,6-hexahydro-1H-phenalen-1-yl)-1-phenyl-1,3,8-triaza-spiro[4.5]decan-4-one] (Ro 64-6198) was characterized in vitro and in vivo for its agonistic potential. Ro 64-6198 was 130- to 3500-fold selective for the OFQ/N receptor (ORL1) compared with opiate receptors. In the cAMP
The international journal of neuropsychopharmacology, 26(7), 483-495 (2023-06-07)
BTRX-246040, a nociceptin/orphanin FQ peptide receptor antagonist, is being developed for the treatment of depressive patients. However, the underlying mechanism of this potential antidepressant is still largely unclear. Here, we studied the antidepressant-related actions of BTRX-246040 in the ventrolateral periaqueductal
Ro 64-6198, the prototypical non-peptide nociceptin/orphanin FQ peptide (NOP) receptor agonist, has potent anxiolytic-like effects in several preclinical models and species. However the effects of Ro 64-6198 on distinctive anxiety-provoking conditions related to unconditioned conflict behavior as well as its
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