title: Prior burn insult induces lethal acute lung injury in endotoxemic mice: effects of cytokine inhibition.
abstract: Many patients who experience surgical stress, including burn injury, become susceptible to severe sepsis and septic organ dysfunction, which remains the primary contributor to morbidity and mortality in burn patients. In the present study, we developed a murine model of burn-primed sublethal endotoxemia by producing a 15% BSA full-thickness burn on the dorsum of BALB/c mice under ether anesthesia and administering 10 mg/kg of LPS intravenously on day 11 to model endotoxemia. The prior burn injury in this model induced two-peaked production of cytokines, TNF-alpha, and macrophage inflammatory protein-2 at 2 and 12 h after LPS administration, and it was associated with increased mortality. We also assessed the effect of pharmacological modulation with cytokine synthesis inhibitors prednisolone and JTE-607 and found that pretreatment with them attenuated later cytokine production and decreased mortality after LPS administration. We speculate that the prior burn injury primed the mice for the secondary insult via cytokine production. These results also suggested that an anticytokine strategy might serve as a novel prophylactic therapy for septic organ dysfunction in burn-primed patients.
authors.affiliation: Department of Emergency and Critical Care Medicine, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku, Tokyo 160 8582, Japan.
authors.forename: Junichi
authors.initials: J
authors.lastname: Sasaki
authors.forename: Seitaro
authors.initials: S
authors.lastname: Fujishima
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Iwamura
authors.forename: Korekiyo
authors.initials: K
authors.lastname: Wakitani
authors.forename: Sadakazu
authors.initials: S
authors.lastname: Aiso
authors.forename: Naoki
authors.initials: N
authors.lastname: Aikawa
mesh_terms: D000208:Acute Disease; D000818:Animals; D002056:Burns / Q000150:complications*; D054426:Chemokine CXCL2; D016207:Cytokines / Q000037:antagonists & inhibitors / Q000378:metabolism*; D019446:Endotoxemia / Q000139:chemically induced / Q000150:complications*; D015870:Gene Expression / Q000187:drug effects; D008070:Lipopolysaccharides / Q000494:pharmacology; D008168:Lung / Q000378:metabolism; D008171:Lung Diseases / Q000209:etiology* / Q000378:metabolism / Q000401:mortality*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D015846:Monokines / Q000235:genetics / Q000378:metabolism; D009195:Peroxidase / Q000378:metabolism; D010649:Phenylalanine / Q000031:analogs & derivatives / Q000494:pharmacology; D010879:Piperazines / Q000494:pharmacology; D011239:Prednisolone / Q000494:pharmacology; D016019:Survival Analysis; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D054426:Chemokine CXCL2; D016207:Cytokines; C468268:JTE 607; D008070:Lipopolysaccharides; D015846:Monokines; D010879:Piperazines; D014409:Tumor Necrosis Factor-alpha; D010649:Phenylalanine; D011239:Prednisolone; D009195:Peroxidase