Discovery and structure-activity relationship of quinuclidine benzamides as agonists of alpha7 nicotinic acetylcholine receptors

J Med Chem. 2005 Feb 24;48(4):905-8. doi: 10.1021/jm049363q.

Abstract

A library of benzamides was tested for alpha7 nicotinic acetylcholine receptor (nAChR) agonist activity using a chimeric receptor in a functional, cell-based, high-throughput assay. From this library, quinuclidine benzamides were found to have alpha7 nAChR agonist activity. The SAR diverged from the activity of this compound class verses the 5-HT(3) receptor, a structural homologue of the alpha7 nAChR. PNU-282987, the most potent compound from this series, was also shown to open native alpha7 nAChRs in cultured rat neurons and to reverse an amphetamine-induced gating deficit in rats.

MeSH terms

  • Animals
  • Benzamides / chemical synthesis*
  • Benzamides / chemistry
  • Benzamides / pharmacology
  • Cells, Cultured
  • Combinatorial Chemistry Techniques
  • Hippocampus / cytology
  • Ion Channel Gating / drug effects
  • Neurons / drug effects
  • Neurons / physiology
  • Nicotinic Agonists / chemical synthesis*
  • Nicotinic Agonists / chemistry
  • Nicotinic Agonists / pharmacology
  • Patch-Clamp Techniques
  • Quinuclidines / chemical synthesis*
  • Quinuclidines / chemistry
  • Quinuclidines / pharmacology
  • Radioligand Assay
  • Rats
  • Receptors, Nicotinic / drug effects*
  • Receptors, Nicotinic / metabolism
  • Serotonin 5-HT3 Receptor Agonists
  • Stereoisomerism
  • Structure-Activity Relationship
  • alpha7 Nicotinic Acetylcholine Receptor

Substances

  • Benzamides
  • Chrna7 protein, rat
  • Nicotinic Agonists
  • Quinuclidines
  • Receptors, Nicotinic
  • Serotonin 5-HT3 Receptor Agonists
  • alpha7 Nicotinic Acetylcholine Receptor