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Protective effects of early treatment with lipoic acid in LPS- induced lung injury in rats

100%

Goraca A., Jozefowicz-Okonkwo G.

Journal of Physiology and Pharmacology

2007

tom 58

nr 3

A lipopolysaccharide (LPS) stimulates the synthesis and releases several metabolites from phagocytes which can lead to an endotoxic shock characterized by multiple organ injury with the earliest to occur in the lungs. Among LPS-induced metabolites, reactive oxygen species are considered to play a crucial pathogenetic role in the lung damage. In this study, the effect of early administration of an antioxidant, alpha-lipoic acid (LA), on pulmonary lipid peroxidation, lung hydrogen peroxide (H202) concentration, and lung sulfhydryl group content was evaluated in rats with endotoxic shock induced by administration of LPS (Escherichia coli 026:B6, 30 mg/kg, i.v.). In addition, lung edema was assessed with wet-to-dry lung weight (W/D) ratio. Animals were treated intravenously with normal saline or LA 60 mg/kg or 100 mg/kg 30 min after LPS injection. After a 5 h observation, animals were killed and the lungs were isolated for measurements. Injection of LPS alone resulted in the development of shock and oxidative stress, the latter indicated by a significant increase in the lung thiobarbituric acid reacting substances (TBARS) and H202 concentrations, and a decrease in the lung sulfhydryl group content. The increase in the W/D ratio after the LPS challenge indicated the development of lung edema in response to LPS. Administration of LA after the LPS challenge resulted in an increase in the sulfhydryl group content and a decrease in TBARS and H202 concentration in the lungs as compared with the LPS group. An insignificant decrease in the W/D ratio was observed in rats treated with either dose of LA. These results indicate that the LPS-induced oxidative lung injury in endotoxic rats can be attenuated by early treatment with LA. Administration of LA could be a useful adjunct to conventional approach in the management of septic shock.

Temperature can prime human peripheral blood neutrophils in a p38MAPKalpha-dependent manner

100%

Jozefowicz-Okonkwo G., Nowak D.

Archivum Immunologiae et Therapiae Experimentalis

2004

tom 52

nr 6

Ograniczanie wyników

1 Archivum Immunologiae et Therapiae Experimentalis

1 Journal of Physiology and Pharmacology

2 Jozefowicz-Okonkwo G.

1 Goraca A.

1 Nowak D.

1 2007

1 2004

Wyniki wyszukiwania

Protective effects of early treatment with lipoic acid in LPS- induced lung injury in rats

Temperature can prime human peripheral blood neutrophils in a p38MAPKalpha-dependent manner