Virtual library docking for cannabinoid-1 receptor agonists with reduced side effects

Nat Commun. 2025 Mar 6;16(1):2237. doi: 10.1038/s41467-025-57136-7.

Abstract

Virtual library docking can reveal unexpected chemotypes that complement the structures of biological targets. Seeking agonists for the cannabinoid-1 receptor (CB1R), we dock 74 million tangible molecules and prioritize 46 high ranking ones for de novo synthesis and testing. Nine are active by radioligand competition, a 20% hit-rate. Structure-based optimization of one of the most potent of these (Ki = 0.7 µM) leads to '1350, a 0.95 nM ligand and a full CB1R agonist of Gi/o signaling. A cryo-EM structure of '1350 in complex with CB1R-Gi1 confirms its predicted docked pose. The lead agonist is strongly analgesic in male mice, with a 2-20-fold therapeutic window over hypolocomotion, sedation, and catalepsy and no observable conditioned place preference. These findings suggest that unique cannabinoid chemotypes may disentangle characteristic cannabinoid side-effects from analgesia, supporting the further development of cannabinoids as pain therapeutics.

MeSH terms

  • Analgesics* / chemistry
  • Analgesics* / pharmacology
  • Animals
  • Cannabinoid Receptor Agonists* / adverse effects
  • Cannabinoid Receptor Agonists* / chemistry
  • Cannabinoid Receptor Agonists* / pharmacology
  • Cannabinoids* / chemistry
  • Cannabinoids* / pharmacology
  • Cryoelectron Microscopy
  • Humans
  • Ligands
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Molecular Docking Simulation
  • Receptor, Cannabinoid, CB1* / agonists
  • Receptor, Cannabinoid, CB1* / chemistry
  • Receptor, Cannabinoid, CB1* / metabolism

Substances

  • Receptor, Cannabinoid, CB1
  • Cannabinoid Receptor Agonists
  • Cannabinoids
  • Analgesics
  • Ligands