Thiazole derivatives as inhibitors of cyclooxygenases in vitro and in vivo.
Eur J Pharmacol
; 750: 66-73, 2015 Mar 05.
Article
em En
| MEDLINE
| ID: mdl-25617797
ABSTRACT
Cyclooxygenases (COXs) are important membrane-bound heme containing enzymes important in platelet activation and inflammation. COX-1 is constitutively expressed in most cells whereas COX-2 is an inducible isoform highly expressed in inflammatory conditions. Studies have been carried out to evaluate thiazole derivatives as anti-inflammatory molecules. In this study, we investigated the in vitro and in vivo effects of two novel thiazole derivatives compound 1 (N-[4-(4-hydroxy-3-methoxyphenyl)-1,3-thiazol-2-yl] acetamide) and compound 2 (4-(2-amino-1,3-thiazol-4-yl)-2-methoxyphenol) on prostaglandin E2 (PGE2) production and COX activity in inflammatory settings. Our results reveal a potent inhibition of both compound 1 (IC50 9.01±0.01µM) and 2 (IC50 11.65±6.20µM) (Mean±S.E.M.) on COX-2-dependent PGE2 production. We also determined whether COX-1 activity was inhibited. Using cells stably over-expressing COX-1 and human blood platelets, we showed that compound 1 is a specific inhibitor of COX-1 with IC50 (5.56×10(-8)±2.26×10(-8)µM), whereas compound 2 did not affect COX-1. Both compounds exhibit anti-inflammatory effect in the dorsal air pouch model of inflammation as shows by inhibition of PGE2 secretion. Modeling analysis of docking in the catalytic site of COX-1 or COX-2 further confirmed the difference in the effect of these two compounds. In conclusion, this study contributes to the design of new anti-inflammatory agents and to the understanding of cyclooxygenase inhibition by thiazole.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Tiazóis
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Inibidores de Ciclo-Oxigenase
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Ciclo-Oxigenase 1
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Ciclo-Oxigenase 2
Limite:
Animals
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Humans
Idioma:
En
Revista:
Eur J Pharmacol
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
França