American Journal of Animal and Veterinary Sciences

CJ-023,423 (Grapiprant) a Potential Novel Active Compound with Antihyperalgetic Properties for Veterinary Patients

Mario Giorgi

DOI : 10.3844/ajavsp.2015.53.56

American Journal of Animal and Veterinary Sciences

Volume 10, Issue 2

Pages 53-56


Companion animals are now living longer and so are more commonly manifesting age- and pain-related disease. Nonsteroidal anti-inflammatory drugs are the most used drug in osteoarthritis and inflammatory pain of various aetiologies. Despite their safety profiles have been amended from the COX-non selective to the COX-2 selective inhibitor class, some adverse effects are still of concern especially in long term treatments. One prostaglandin (PG) downstream from the cyclooxygenase enzyme, PGE2, has been recognized as a pivotal mediator of pain and inflammation. The actions of PGE2 are produced by its interaction with four G-protein coupled receptors (EP1, EP2, EP3 and EP4). The EP4 receptor mediates PGE2-elicited sensitization of sensory neurons and studies have demonstrated that EP4 is a major receptor in mediating pain associated with both rheumatoid and osteoarthritis and in inflammation. CJ-023,423 (grapiprant) is a competitive antagonist of human and rat prostanoid EP4 receptors, under development for the control of pain and inflammation associated with osteoarthritisfor use in humans and dogs. A recent study has shown the good safety profile of this active ingredient in dogs. Despite this molecule is still far to be marketed because it pharmacokinetic/pharmacodynamics profile is need to be fully elucidated yet, it might be an interesting active ingredient for the veterinary medicine.


© 2015 Mario Giorgi. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.