Cyclooxygenase-2 (COX-2), an enzyme that catalyzes the synthesis of prostaglandins, is made inducible by various stimuli such as inflammation. Although COX-2 is commonly overexpressed in a variety of premalignant and malignant conditions including oral leukoplakia and squamous cell carcinoma, relatively little research has compared the effects of various COX-2 inhibitors (celecoxib, NS-398, nim...

1. It is well known that neutrophils act as mediators of tissue injury in a variety of inflammatory diseases. Their histotoxic activity is presently thought to involve proteinases and oxidants, primarily hypochlorous acid (HOCl). This oxidant is also capable of inactivating the specific inhibitor of neutrophil elastase (alpha 1-antitrypsin), thereby favouring digestion of the connective matrix....

INTRODUCTION Nimesulide is a relatively cyclo-oxygenase-2 (COX2) selective, non-steroidal anti-inflammatory drug (NSAID) with analgesic and antipyretic properties. Its approved indications are the treatment of acute pain, the symptomatic treatment of osteoarthritis and primary dysmenorrhoea in adolescents and adults above 12 years old to decrease the risk of hepatotoxicity. It may be used orall...

We have reported that the renal hemodynamic effects of norepinephrine (NE) are modulated by cyclooxygenase-2 (COX-2)-derived metabolites. Our main objective was to examine whether there is an interaction between nitric oxide (NO) and COX-2 in modulating the renal hemodynamic effects of NE. NE was infused at three doses to anesthetized dogs pretreated with vehicle (n = 8), a selective COX-2 inhi...

Bisphosphonates are antiatherosclerotic, suppress monocyte-macrophages, and modulate proinflammatory mediators. Prostaglandin (PG) E(2), thromboxane (TX) A(2), and cyclooxygenase-2 (COX-2) enzyme are involved in inflammation and atherosclerosis. We studied the effects of four bisphosphonates (etidronate, clodronate, tiludronate, and alendronate) on PGE(2) and TXB(2) production in human whole bl...