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Title: Dopamine D3/D2 Receptor Antagonist PF-4363467 Attenuates Opioid Drug-Seeking Behavior without Concomitant D2 Side Effects

Journal Article · · ACS Chemical Neuroscience
 [1];  [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [1];  [1];  [1];  [3];  [1];  [1];  [1];  [2]
  1. Pfizer Worldwide Research and Development, Cambridge, MA (United States)
  2. Pfizer Worldwide Research and Development, Groton, CT (United States)
  3. Pfizer Worldwide Research and Development, Chemistry and Biology, Eastern Point Road, Groton, Connecticut 06340, United States

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 PF-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 Ki = 3.1 nM), good subtype selectivity over D2R (D2 Ki = 692 nM), and high selectivity for D3R versus other biogenic amine receptors. In vivo, 3 dose-dependently 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 3 has a unique in vivo profile. Collectively, our data support further investigation of dual D3R and D2R antagonists for the treatment of drug addiction.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC)
OSTI ID:
1440592
Journal Information:
ACS Chemical Neuroscience, Vol. 8, Issue 1; ISSN 1948-7193
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Cited By (1)

Dopamine D3 receptor antagonist reveals a cryptic pocket in aminergic GPCRs journal January 2018

Figures / Tables (10)