Author | Xavier-Elsas, Pedro Paulo | |
Author | Queto, T. | |
Author | Mendonça-Sales, S. C. | |
Author | Elsas, Maria Ignez Capella Gaspar | |
Author | Kanaoka, Y. | |
Author | Lam, B. K. | |
Access date | 2012-11-29T14:30:56Z | |
Available date | 2012-11-29T14:30:56Z | |
Document date | 2008 | |
Citation | XAVIER-ELSAS, Pedro Paulo et al. Cysteinyl leukotrienes mediate the enhancing effects of indomethacin and aspirin on eosinophil production in murine bone marrow cultures. British Journal of Pharmacology, v. 153, p. 528-535, Feb. 2008. | pt_BR |
ISSN | 0007-1188 | |
URI | https://www.arca.fiocruz.br/handle/icict/5903 | |
Sponsorship | CNPq, CAPES, FIOCRUZ | pt_BR |
Language | eng | pt_BR |
Publisher | Wiley-Blackwell | pt_BR |
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Rights | restricted access | pt_BR |
Title | Cysteinyl leukotrienes mediate the enhancing effects of indomethacin and aspirin on eosinophil production in murine bone marrow cultures | pt_BR |
Type | Article | pt_BR |
DOI | 10.1038/sj.bjp.0707586 | |
Abstract | Prostaglandin E2 (PGE2) suppresses, while indomethacin and aspirin enhance, eosinophil production in murine liquid bone-marrow cultures. Because cysteinyl leukotrienes (cys-LTs) enhance human eosinophil colony formation, we investigated whether the effects of indomethacin and aspirin on murine bone-marrow were due to blockade of PGE2 production alone, or involved further promotion of cys-LTs production/signalling. Experimental approach: BALB/c liquid bone-marrow cultures were established with IL-5, alone or associated with indomethacin, aspirin, or cys-LTs. The effects of preventing cys-LT production or signalling were assessed. Key results: Indomethacin and aspirin counteracted the suppression of eosinophil production by exogenous PGE2. LTD4, LTC4 and LTE4 enhanced IL-5-dependent eosinophil production and further counteracted the effect of exogenous PGE2. The 5-lipoxygenase activating protein (FLAP) inhibitor, MK886, a leukotriene synthesis inhibitor, zileuton, the CysLT1 receptor antagonists, MK571 and montelukast, or inactivation of the LTC4 synthase gene, abolished effects of indomethacin and aspirin. MK886 and zileuton were ineffective but MK571 and montelukast were effective, against LTD4. Indomethacin, aspirin and LTD4 failed to enhance eosinophil production in bone-marrow from CysLT1 receptor-deficient mice. Indomethacin, aspirin and LTD4 no longer counteracted the effects of exogenous PGE2 in the presence of MK571 and montelukast. MK886, MK571 and montelukast had no effect by themselves, or in association with PGE2. Conclusions and implications: Dependence on the FLAP/5-lipoxygenase/LTC4 synthase pathway and receptor signalling shows that cyclo-oxygenase inhibitors act here through endogenous cys-LTs. While PGE2 does not act by suppressing cys-LT production, cys-LTs override PGE2 signalling. Eosinophil production is therefore coordinately regulated by both pathways. | pt_BR |
Affilliation | Universidade Federal do Rio de Janeiro. Instituto de Microbiologia Paulo de Góes. Departamento de imunologia. Rio de Janeiro, RJ, Brasil / Brigham and Women’s Hospital. Department of Medicine. Division of Rheumatology, Immunology and Allergy. Boston, MA, USA. | pt_BR |
Affilliation | Fundação Oswaldo Cruz. Instituto Fernandes Figueira. Departamento de Pediatria. Rio de Janeiro, RJ, Brasil. | pt_BR |
Affilliation | Fundação Oswaldo Cruz. Instituto Fernandes Figueira. Departamento de Pediatria. Rio de Janeiro, RJ, Brasil. | pt_BR |
Affilliation | Fundação Oswaldo Cruz. Instituto Fernandes Figueira. Departamento de Pediatria. Rio de Janeiro, RJ, Brasil. | pt_BR |
Affilliation | Brigham and Women’s Hospital. Department of Medicine. Division of Rheumatology, Immunology and Allergy. Boston, MA, USA. | pt_BR |
Affilliation | Brigham and Women’s Hospital. Department of Medicine. Division of Rheumatology, Immunology and Allergy. Boston, MA, USA. | pt_BR |
Subject | NSAID | pt_BR |
Subject | Cysteinyl Leukotriene | pt_BR |
Subject | Bone Marrow | pt_BR |
Subject | Eosinophils | pt_BR |
Subject | Haematopoiesis | pt_BR |
Subject | COX | pt_BR |
Subject | 5-lipoxygenase | pt_BR |
DeCS | Asma Induzida por Aspirina | pt_BR |
DeCS | Leucotrieno C4 | pt_BR |
DeCS | Medula Óssea | pt_BR |
DeCS | Eosinófilos | pt_BR |
DeCS | Anoplura | pt_BR |
DeCS | Araquidonato 5-Lipoxigenase | pt_BR |