Background: Platelet-activating factor (PAF) has been long believed to be associated with many pathophysiological processes during septic shock. Here we present novel activities for PAF in protecting mice against LPS-mediated endotoxic shock. Principal Findings: In vivo PAF treatment immediately after LPS challenge markedly improved the survival rate against mortality from endotoxic shock. Administration of PAF prominently attenuated LPS-induced organ injury, including profound hypotension, excessive polymorphonuclear neutrophil infiltration, and severe multiple organ failure. In addition, PAF treatment protects against LPS-induced lymphocytes apoptosis. These protective effects of PAF was correlated with significantly decreases in the production of the inflammatory mediators such as TNF-α, IL-1β, IL-12, and IFN-γ, while increasing production of the anti-inflammatory cytokine IL-10 in vivo and in vitro. Conclusions: Taken together, these results suggest that PAF may protect mice against endotoxic shock via a complex mechanism involving modulation of inflammatory and anti-inflammatory mediators. © 2009 Jeong et al.
Jeong, Y. I., Jung, I. D., Lee, C. M., Chang, J. H., Chun, S. H., Noh, K. T., … Park, Y. M. (2009). The novel role of platelet-activating factor in protecting mice against lipopolysaccharide-induced endotoxic shock. PLoS ONE, 4(8). https://doi.org/10.1371/journal.pone.0006503