Human ApoA-I overexpression diminishes LPS-induced systemic inflammation and multiple organ damage in mice

Apolipoprotein A-I (ApoA-I) is the major apolipoprotein of high density lipoprotein (HDL). To investigate the protective effect of ApoA-I against lipopolysaccharide (LPS)-induced systemic inflammation and multiple organ damage in mice, we established a human ApoA-I overexpression mouse model using recombinant adenovirus vector (AdV-AI). The histomorphologic analysis showed that AdV-AI administration greatly attenuated LPS-induced acute injury it) lung and kidney. AdV-AI treatment also significantly inhibited LPS-induced increments Of tumor necrosis factor (TNF)-alpha, interleukin (IL)-6, IL-1 beta levels in serum (P < 0.01, P < 0.05 and P < 0.05, respectively) and in bronchoalverolar lavage fluid (P < 0.05, respectively), and of serum creatine kinase and creatinine levels (P < 0.05, respectively). Moreover, we found that the increments of CD14 expression in liver and lung induced by LPS were significantly reduced by AdV-Al treatment (P < 0.05 and P < 0.01, respectively). In conclusion, adenovirus-mediated ApoA-I overexpression plays a protective effect against LPS-induced systemic inflammation and multiple organ damage in mice. Such effect may attribute partly to the Suppression of inflammatory cytokine release and reduction of CD 14 expression. (C) 2008 Elsevier B.V. All rights reserved.