OBJECTIVE Cytochrome P450 (CYP) epoxygenases metabolize arachidonic acid to epoxyeicosatrienoic acids (EETs). CYP2C9-derived EETs elicit endothelial cell proliferation and angiogenesis, but the signaling pathways involved are incompletely understood. Because cyclooxygenase-2 (COX-2) is involved in angiogenesis, we determined whether a link exists between CYP2C9 and COX-2 expression. METHODS A...

Results Injection of 0.5mg/kg and 5mg/kg of melittin suppressed tumor growth by 25.30% and 56.92%, respectively; these results are superior to those obtained for mice treated with the COX-2 inhibitor, NS398. Melittin reduced tumor cell proliferation (PCNA), microvessel density (MVD), expression of cyclooxygenase-2 (COX2), VEGF-A, and VEGFR-2, but did not affect VEGFR-1, in VEGF-A-induced hm LLC...

The phospholipid mediator platelet-activating factor (PAF), and its non-hydrolyzable analog methylcarbamyl-PAF (mc-PAF) increase prostaglandin E(2) (PGE(2)) release from astrocyte-enriched cortical cell cultures. Cyclooxygenase (COX) enzymes--of which there are two known isoforms--convert arachidonic acid to prostaglandin (PG) H(2) (PGH(2)), which is further metabolized to various PGs, includin...

Background: Cyclooxygenase isoforms (COX-1, COX-2) may exert differential regulatory actions on enteric motor functions under normal or pathological conditions. Aims: To examine the occurrence and functions of COX-1 and COX-2 in the neuromuscular compartment of normal distal colon using human and murine tissue. Methods: Gene expression (human, mouse), protein expression (human), gene deletion (...

Bradbury, D. A., R. Newton, Y.-M. Zhu, J. Stocks, L. Corbett, E. D. Holland, L. H. Pang, and A. J. Knox. Effect of bradykinin, TGF1, IL-1 , and hypoxia on COX-2 expression in pulmonary artery smooth muscle cells. Am J Physiol Lung Cell Mol Physiol 283: L717–L725, 2002. First published May 10, 2002; 10.1152/ajplung.00070.2002.—Prostanoids are major regulators of smooth muscle function that are g...

introduction: ketoprofen is an nsaid and selective cox-1 inhibitor. in our previous study the role of flunixin meglumine, a nonselective cox inhibitor was studied on seizure and its anticonvulsant effects were confirmed. therefore this research is performed to assess the role of a selective cox-1 inhibitor, ketoprofen in treatment of seizures induced by ptz. methods: in this research, male wist...

Cyclooxygenase (Cox) is a key enzyme in the biosynthesis of prostaglandins and, as such, is the target of non-steroidal anti-inflammatory drugs (NSAIDs). Two isoforms exist, being expressed constitutively (Cox-1), or inducibly in response to inflammatory mediators (Cox-2). Currently available NSAIDs inhibit both isoforms somewhat equipotently but selective Cox-2 inhibition may eliminate unwante...