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Selected Publication:
Köfeler, HC; Fauler, G; Windischhofer, W; Leis, HJ.
Effect of cytochrome P-450 inhibitors econazole, bifonazole and clotrimazole on prostanoid formation.
Br J Pharmacol. 2000; 130(6):1241-1246
Doi: 10.1038/sj.bjp.0703427
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- Leading authors Med Uni Graz
- Köfeler Harald
- Co-authors Med Uni Graz
- Fauler Günter
- Leis Hans-Joerg
- Windischhofer Werner
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- Abstract:
- 1. The present study was carried out to clarify the effect of the imidazole antimycotics econazole, bifonazole and clotrimazole on prostanoid biosynthesis. Osteoblast-like MC3T3-E1 cells stimulated by endothelin-1, melittin, ionomycin or arachidonic acid showed diminished prostaglandin E(2) (PGE(2)) production upon pretreatment with econazole. Following pretreatment with bifonazole, stimulation with ionomycin or arachidonic acid also resulted in decreased PGE(2) formation. Clotrimazole inhibited ionomycin but not arachidonic acid stimulated PGE(2) synthesis in MC3T3-E1 cells. 2. The results observed in osteoblast-like UMR-106 cells pretreated with econazole, bifonazole or clotrimazole and stimulated by arachidonic acid were similar with the exception of clotrimazole which was a more effective inhibitor of PGE(2) biosynthesis than in MC3T3-E1 cells. 3. Upon treatment with arachidonic acid thromboxane B(2) (TXB(2)) production in human platelets was abolished completely at concentrations of the three imidazole antimycotics higher than 5 microM (IC(50)<1 microM). 4. These data were confirmed by a direct assay using purified ram seminal vesicle prostaglandin H(2) synthase-1 (PGHS-1), which clearly showed inhibitory properties of econazole (IC(50) 4.7+/-2.3 microM), bifonazole (IC(50) 9.4+/-0.8 microM) and clotrimazole (IC(50) 4.4+/-0.6 microM). 5. Summarizing, these results indicate an inhibitory effect of econazole, bifonazole and clotrimazole on PGHS-1, varying in its potency dependent on the cell system used. In addition TXB(2) formation is affected at doses even lower than those needed to suppress PGE(2) biosynthesis.
- Find related publications in this database (using NLM MeSH Indexing)
- Animals -
- Blood Platelets - drug effects
- Cell Line - drug effects
- Clotrimazole - pharmacology
- Cyclooxygenase 1 - pharmacology
- Cytochrome P-450 Enzyme System - antagonists and inhibitors
- Dinoprostone - biosynthesis
- Dose-Response Relationship, Drug - biosynthesis
- Econazole - pharmacology
- Enzyme Inhibitors - pharmacology
- Humans - pharmacology
- Imidazoles - pharmacology
- Ionomycin - pharmacology
- Isoenzymes - drug effects
- Membrane Proteins - drug effects
- Prostaglandin-Endoperoxide Synthases - drug effects
- Prostaglandins - biosynthesis
- Thromboxane B2 - biosynthesis
- Tumor Cells, Cultured - biosynthesis
- Find related publications in this database (Keywords)
- econazole
- bifonazole
- clotrimazole
- prostaglandin H-2 synthase-1
- thromboxane A(2) synthase
- MC3T3-E1 cells
- UMR-106 cells
- human platelets