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2016 ; 196
(5
): 2319-26
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C1P Attenuates Lipopolysaccharide-Induced Acute Lung Injury by Preventing NF-?B
Activation in Neutrophils
#MMPMID26800872
Baudiß K
; de Paula Vieira R
; Cicko S
; Ayata K
; Hossfeld M
; Ehrat N
; Gómez-Muñoz A
; Eltzschig HK
; Idzko M
J Immunol
2016[Mar]; 196
(5
): 2319-26
PMID26800872
show ga
Recently, ceramide-1-phosphate (C1P) has been shown to modulate acute
inflammatory events. Acute lung injury (Arnalich et al. 2000. Infect. Immun. 68:
1942-1945) is characterized by rapid alveolar injury, lung inflammation, induced
cytokine production, neutrophil accumulation, and vascular leakage leading to
lung edema. The aim of this study was to investigate the role of C1P during
LPS-induced acute lung injury in mice. To evaluate the effect of C1P, we used a
prophylactic and therapeutic LPS-induced ALI model in C57BL/6 male mice. Our
studies revealed that intrapulmonary application of C1P before (prophylactic) or
24 h after (therapeutic) LPS instillation decreased neutrophil trafficking to the
lung, proinflammatory cytokine levels in bronchoalveolar lavage, and alveolar
capillary leakage. Mechanistically, C1P inhibited the LPS-triggered NF-?B levels
in lung tissue in vivo. In addition, ex vivo experiments revealed that C1P also
attenuates LPS-induced NF-?B phosphorylation and IL-8 production in human
neutrophils. These results indicate C1P playing a role in dampening LPS-induced
acute lung inflammation and suggest that C1P could be a valuable candidate for
treatment of ALI.