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Effect of 5-lipoxygenase inhibitor against lipopolysaccharide-induced hypothermia in mice.
Indian J Exp Biol ; 2005 Dec; 43(12): 1150-5
Artigo em Inglês | IMSEAR | ID: sea-60346
ABSTRACT
Bacterial endotoxin produces sepsis associated with alterations in body temperature (fever or hypothermia). The intraperitoneal administration of bacterial endotoxin, lipopolysaccharide (LPS; 50 microg/mouse) led to a decrease in colonic temperature starting 1 hr after the injection. The hypothermic effect was accompanied by a significant increase in hypothalamic leukotriene B4 (LTB4) and prostaglandin E2 (PGE2) levels. 5-lipoxygenase inhibitor, zileuton (200 and 400 mg/kg, po) administered 30 min before LPS challenge significantly prevented hypothermia. However, non-selective cyclooxygenase inhibitor, indomethacin (10, 20 mg/kg, po) did not reverse the hypothermic response. Further, pretreatment of mice with zileuton prevented LPS-stimulated increase in hypothalamic LTB4 levels and caused a relatively small increase in PGE2 levels. Indomethacin had no effect on LTB4 levels but it reduced PGE2 levels. These results suggest a possible involvement of leukotrienes in LPS-induced hypothermia and the potential protective role of 5-lipoxygenase inhibitors in endotoxemia.
Assuntos
Texto completo: DisponíveL Índice: IMSEAR (Sudeste Asiático) Assunto principal: Araquidonato 5-Lipoxigenase / Feminino / Masculino / Dinoprostona / Indometacina / Lipopolissacarídeos / Leucotrienos / Inibidores de Lipoxigenase / Colo / Leucotrieno B4 Idioma: Inglês Revista: Indian J Exp Biol Ano de publicação: 2005 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: IMSEAR (Sudeste Asiático) Assunto principal: Araquidonato 5-Lipoxigenase / Feminino / Masculino / Dinoprostona / Indometacina / Lipopolissacarídeos / Leucotrienos / Inibidores de Lipoxigenase / Colo / Leucotrieno B4 Idioma: Inglês Revista: Indian J Exp Biol Ano de publicação: 2005 Tipo de documento: Artigo