BMS-986122

BMS-986122 is a selective, potent positive allosteric modulator of the mu-opioid receptor (µ-OR). BMS-986122 shows potentiation of orthosteric agonist-mediated β-arrestin recruitment, adenylyl cyclase inhibition, and G protein activation. BMS-986122 potentiates DAMGO-mediated [³⁵S]GTPγS binding in mouse brain membranes^[1][2]. In Vitro: BMS-986122 increases β-arrestin recruitment stimulated by endomorphin 1 (EC₅₀=3 μM) in U2OS-OPRM1 human osteosarcoma cells expressing μ-opioid receptors. BMS-986122 potentiates endomorphin 1-induced inhibition of forskolin-stimulated adenylyl cyclase activity in CHO cells expressing human recombinant μ-opioid receptors (EC₅₀=8.9 μM). BMS-986122 potentiates DAMGO-mediated [35S]GTPγS binding in mouse brain membranes and appears to be, at least in part, a positive affinity modulator of the μ-opioid receptor for DAMGO binding^[1].
BMS-986122 enhances the ability of the endogenous opioid Methionine-enkephalin (Met-Enk) to stimulate G protein activity in mouse brain homogenates without activity on its own and to enhance G protein activation to a greater extent than β-arrestin recruitment in CHO cells expressing human mu-opioid receptors. BMS-986122 increases the potency of Met-Enk to inhibit GABA release in the periaqueductal gray, an important site for antinociception^[2].
BMS-986122 is selective for µ-OR and has no detectable activity at the closely related δ-OR. BMS-986122 is a silent allosteric modulator at δ-OR and κ-OR^[3].