Identification of 2,3-diaryl-pyrazolo[1,5-b]pyridazines as potent and selective cyclooxygenase-2 inhibitors

Bioorg Med Chem Lett. 2004 Nov 1;14(21):5445-8. doi: 10.1016/j.bmcl.2004.07.089.

Abstract

GW406381 (8), currently undergoing clinical evaluation for the treatment of inflammatory pain is a member of a novel series of 2,3-diaryl-pyrazolo[1,5-b]pyridazine based cyclooxygenase-2 (COX-2) inhibitors, which have been shown to be highly potent and selective. Several examples of the series, in addition to possessing favourable pharmacokinetic profiles and analgesic activity in vivo, have also demonstrated relatively high brain penetration in the rat compared with the clinically available compounds, which may ultimately prove beneficial in the treatment of pain.

Publication types

  • Comparative Study

MeSH terms

  • Administration, Oral
  • Animals
  • Arthritis, Experimental / chemically induced
  • Arthritis, Experimental / drug therapy
  • Biological Availability
  • Brain / metabolism
  • Cyclooxygenase 2
  • Cyclooxygenase 2 Inhibitors
  • Cyclooxygenase Inhibitors / chemical synthesis*
  • Cyclooxygenase Inhibitors / chemistry
  • Cyclooxygenase Inhibitors / pharmacokinetics
  • Freund's Adjuvant
  • Humans
  • Infusions, Intravenous
  • Male
  • Membrane Proteins
  • Prostaglandin-Endoperoxide Synthases / chemistry*
  • Prostaglandin-Endoperoxide Synthases / metabolism
  • Pyrazoles / chemical synthesis*
  • Pyrazoles / chemistry
  • Pyrazoles / pharmacology
  • Pyridazines / chemical synthesis*
  • Pyridazines / chemistry
  • Pyridazines / pharmacology
  • Rats
  • Structure-Activity Relationship

Substances

  • Cyclooxygenase 2 Inhibitors
  • Cyclooxygenase Inhibitors
  • Membrane Proteins
  • Pyrazoles
  • Pyridazines
  • Freund's Adjuvant
  • Cyclooxygenase 2
  • PTGS2 protein, human
  • Prostaglandin-Endoperoxide Synthases