RT Journal Article SR Electronic T1 Cebranopadol blocks the escalation of cocaine intake and conditioned reinstatement of cocaine seeking in rats JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP jpet.117.241042 DO 10.1124/jpet.117.241042 A1 Giordano de Guglielmo A1 Alessandra Matzeu A1 Jenni Kononoff A1 Julia Mattioni A1 Remi Martin-Fardon A1 Olivier George YR 2017 UL http://jpet.aspetjournals.org/content/early/2017/06/23/jpet.117.241042.abstract AB Cebranopadol is a novel agonist of nociceptin/orphanin FQ peptide (NOP) and opioid receptors with analgesic properties that is being evaluated in clinical Phase 2 and Phase 3 trials for the treatment of chronic and acute pain. Recent evidence indicates that the combination of opioid and NOP receptor agonism may be a new treatment strategy for cocaine addiction. We sought to extend these findings by examining the effects of cebranopadol on cocaine self-administration (0.5 mg/kg/infusion) and cocaine conditioned reinstatement in rats with extended access to cocaine. Oral administration of cebranopadol (0, 25, and 50 g/kg) reversed the escalation of cocaine self-administration in rats that were given extended (6 h) access to cocaine, whereas it did not affect the self-administration of sweetened condensed milk (SCM). Cebranopadol induced conditioned place preference but did not affect locomotor activity during the conditioning sessions. Finally, cebranopadol blocked the conditioned reinstatement of cocaine seeking. These results show that oral cebranopadol treatment prevented addiction-like behaviors (i.e., the escalation of intake and reinstatement), suggesting that it may be a novel strategy for the treatment of cocaine use disorder. However, the conditioned place preference that was observed after cebranopadol administration suggests that this compound may have some intrinsic rewarding effects.