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. 1996 Apr;223(4):428–433. doi: 10.1097/00000658-199604000-00012

A role for tumor necrosis factor-alpha in the increased mortality associated with Vibrio vulnificus infection in the presence of hepatic dysfunction.

N J Espat 1, T Auffenberg 1, A Abouhamze 1, J Baumhofer 1, L L Moldawer 1, R J Howard 1
PMCID: PMC1235139  PMID: 8633922

Abstract

OBJECTIVE: The present study was designed to evaluate whether pre-existing hepatic dysfunction (cirrhosis) leads to increased morbidity and mortality, in part through an inappropriate in vivo tumor necrosis factor-alpha response. SUMMARY BACKGROUND DATA: Vibrio vulnificus is the most commonly isolated member of the noncholera Vibrio sp., responsible for fulminant and frequently fatal septicemia. A strong clinical association exists between hepatic dysfunction and increased morbidity and mortality from Vibrio sp. infection. However, the underlying mechanism behind this association has not been fully delineated. METHODS: Cirrhosis was induced in C57BL/6 (15 to 20 g) mice using thrice-weekly injections of carbon tetrachloride (CCl4) for 7 weeks. Either a 7.0 to 9.5 X 10(7) (low dose) or a 0.8 to 1.2 X 10(9) colony-forming unit (high dose) of V. vulnificus was administered through a mini-laparotomy incision via transgastric puncture into both cirrhotic and control animals. RESULTS: Mortality in cirrhotic mice to low- and high-dose Vibrio infection was 88% (7/8) and 100% (8/8), respectively, whereas mortality in control animals was 0% (0/8) and 12% (1/8), respectively (p<0.01). Tumor necrosis factor-alpha mRNA could be detected by reverse transcriptase polymerase chain reaction in livers and lungs from infected animals 2 and 4 hours after Vibrio administration in both control and cirrhotic animals. Lung and liver tumor necrosis factor-alpha bioactivity, however, was significantly lower in cirrhotic animals infected with Vibrio when compared with controls. Serum tumor necrosis factor-alpha was only sporadically detected in both groups of Vibrio-infected animals. When cirrhotic mice challenged with a low dose of Vibrio sp. were pretreated with 1.0 mg/kg body weight of a novel tumor necrosis factor-alpha receptor immunoadhesin, the increased mortality was completely prevented. CONCLUSIONS: Cirrhotic mice show increased mortality to Vibrio infection, and this increased mortality is dependent on an in vivo tumor necrosis factor-alpha response.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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