Blockade of LOX-1 prevents endotoxin-induced acute lung inflammation and injury in mice

P Zhang, MC Liu, L Cheng, M Liang, H Ji… - Journal of Innate …, 2009 - karger.com
P Zhang, MC Liu, L Cheng, M Liang, H Ji, J Fu
Journal of Innate Immunity, 2009karger.com
Lectin-like oxidized low-density lipoprotein (LDL) receptor-1 (LOX-1), a cell surface receptor
expressed in endothelial cells, is known to mediate oxidized LDL-induced vascular
inflammation and atherogenesis. Although the role of LOX-1 in vascular inflammation has
been well established, its involvement in acute lung inflammation and injury remains
unclear. In the present study, we examined the effects of a LOX-1-blocking antibody on lung
inflammation in a mouse endotoxin lipopolysaccharide (LPS)-induced acute lung injury …
Abstract
Lectin-like oxidized low-density lipoprotein (LDL) receptor-1 (LOX-1), a cell surface receptor expressed in endothelial cells, is known to mediate oxidized LDL-induced vascular inflammation and atherogenesis. Although the role of LOX-1 in vascular inflammation has been well established, its involvement in acute lung inflammation and injury remains unclear. In the present study, we examined the effects of a LOX-1-blocking antibody on lung inflammation in a mouse endotoxin lipopolysaccharide (LPS)-induced acute lung injury model. We demonstrated that intraperitoneal challenge with LPS induced a rapid and robust increase in LOX-1 expression in mouse lung. Pre-treatment of mice with anti-LOX-1-blocking antibody significantly inhibited LPS-induced lung inflammation as indicated by decreased neutrophil accumulation in the lung. Furthermore, anti-LOX-1 was capable of inhibiting LPS-induced inflammatory responses, including NF-κB activation, ICAM-1 expression and apoptotic signaling, in mouse lung. Collectively, these results indicate that LOX-1 may serve as a valuable therapeutic target in the prevention of acute lung inflammation and injury in sepsis.
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