Open Access Research article

Common TNF-α, IL-1β, PAI-1, uPA, CD14 and TLR4 polymorphisms are not associated with disease severity or outcome from Gram negative sepsis

Kristine Marie Jessen1, Sarah Bjerre Lindboe1, Anncatrine Luisa Petersen1, Jesper Eugen-Olsen1 and Thomas Benfield2*

Author affiliations

1 Clinical Research Unit, Hvidovre University Hospital, Copenhagen, Denmark

2 Department of Infectious Diseases, Hvidovre University Hospital, Copenhagen, Denmark

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Citation and License

BMC Infectious Diseases 2007, 7:108  doi:10.1186/1471-2334-7-108

Published: 18 September 2007

Abstract

Background

Several studies have investigated single nucleotide polymorphisms (SNPs) in candidate genes associated with sepsis and septic shock with conflicting results. Only few studies have combined the analysis of multiple SNPs in the same population.

Methods

Clinical data and DNA from consecutive adult patients with culture proven Gram negative bacteremia admitted to a Danish hospital between 2000 and 2002. Analysis for commonly described SNPs of tumor necrosis-α, (TNF-α), interleukin-1β (IL-1β), plasminogen activator-1 (PAI-1), urokinase plasminogen activator (uPA), CD14 and toll-like receptor 4 (TLR4) was done.

Results

Of 319 adults, 74% had sepsis, 19% had severe sepsis and 7% were in septic shock. No correlation between severity or outcome of sepsis was observed for the analyzed SNPs of TNF-α, IL-1β, PAI-1, uPA, CD14 or TLR-4. In multivariate Cox proportional hazard regression analysis, increasing age, polymicrobial infection and haemoglobin levels were associated with in-hospital mortality.

Conclusion

We did not find any association between TNF-α, IL-1β, PAI-1, uPA, CD14 and TLR4 polymorphisms and outcome of Gram negative sepsis. Other host factors appear to be more important than the genotypes studied here in determining the severity and outcome of Gram negative sepsis.