Benzenesulfonamide indole inhibitors of cytosolic phospholipase A2alpha: optimization of in vitro potency and rat pharmacokinetics for oral efficacy

Bioorg Med Chem. 2008 Feb 1;16(3):1345-58. doi: 10.1016/j.bmc.2007.10.060. Epub 2007 Oct 22.

Abstract

The synthesis and structure-activity relationship of a series of benzenesulfonamide indole inhibitors of cPLA(2)alpha are described. Substitution of the benzenesulfonamide led to analogues with 50-fold improvement in potency versus the unsubstituted benzenesulfonamide lead compound. Rat pharmacokinetics in a minimal formulation was used to prioritize compounds, leading to the discovery of a potent inhibitor of cPLA(2)alpha with oral efficacy in models of rat carrageenan paw edema and Ascaris suum airway challenge in naturally sensitized sheep.

MeSH terms

  • Administration, Oral
  • Animals
  • Ascariasis / drug therapy
  • Ascariasis / parasitology
  • Ascaris suum / physiology
  • Benzenesulfonamides
  • Calorimetry
  • Group IV Phospholipases A2 / antagonists & inhibitors*
  • Group IV Phospholipases A2 / metabolism*
  • Humans
  • Indoles / chemistry
  • Indoles / pharmacology*
  • Indoles / therapeutic use
  • Molecular Structure
  • Rats
  • Sheep
  • Structure-Activity Relationship
  • Sulfonamides / chemistry*
  • Temperature

Substances

  • Indoles
  • Sulfonamides
  • indole
  • Group IV Phospholipases A2