Dopamine D3/D2 Receptor Antagonist PF-4363467 Attenuates Opioid Drug-Seeking Behavior without Concomitant D2 Side Effects
作者:Travis T. Wager、Thomas Chappie、David Horton、Ramalakshmi Y. Chandrasekaran、Brian Samas、Elizabeth R. Dunn-Sims、Cathleen Hsu、Nawshaba Nawreen、Michelle A. Vanase-Frawley、Rebecca E. O’Connor、Christopher J. Schmidt、Keith Dlugolenski、Nancy C. Stratman、Mark J. Majchrzak、Bethany L. Kormos、David P. Nguyen、Aarti Sawant-Basak、Andy N. Mead
DOI:10.1021/acschemneuro.6b00297
日期:2017.1.18
Dopamine receptor antagonism is a compelling molecular target for the treatment of a range of psychiatric disorders, including substance use disorders. From our corporate compound file, we identified a structurally unique D3 receptor(D3R) antagonist scaffold, 1. Through a hybrid approach, we merged key pharmacophore elements from 1 and D3 agonist 2 to yield the novel D3R/D2R antagonist PE-4363467 (3). Compound 3 was designed to possess CNS drug-like properties as defined by its CNS MPO desirability score (>= 4/6). In addition to good physicochemical properties, 3 exhibited low nanomolar affinity for the D3R (D3 K-i = 3.1 nM), good subtype selectivity over D2R (D2 K-i = 692 nM), and high selectivity for D3R versus other biogenic amine receptors. In vivo, 3 dose-depeodentlye attenuated opioid self-administration and opioid drug-seeking, behavior in a rat operant reinstatement model using animals trained to self-administer fentanyl. Further,. traditional extrapyramidal symptoms (EPS), adverse side effects arising from D2R antagonism, were not observed despite high D2 receptor occupancy (RO) in rodents, suggesting that compound 3e has a unique in vivo profile. Collectively, our data support further investigation of dual D3R and D2R antagonists for the treatment of drug addiction.