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Characterization of tumour necrosis factor-alpha genetic variants and mRNA expression in patients with severe sepsis.

Abstract：

:Tumour necrosis factor-alpha (TNFalpha) has been implicated in the pathogenicity of severe sepsis by both genetic association studies and animal models. Conflicting functional data have emerged in relation to genetic variants and TNFalpha protein production. Therefore, we assessed the functionality of TNFalpha genetic variants in terms of mRNA production and their potential influence on outcome in the setting of severe sepsis. Sixty-two Irish Caucasian patients presenting with severe sepsis were recruited and TNFalpha mRNA and protein levels were quantified. Patient DNA was analysed for the presence of common promoter polymorphisms and haplotypes were inferred. An A allele at position -863 was associated with more TNFalpha mRNA on day 1 compared to C homozygotes (P = 0.037). There was a trend for G homozygotes at position -308 to produce more TNFalpha mRNA on day 1 than those carrying an A allele (P = 0.059). The presence of an A allele at -863 was associated with greater levels of TNFalpha mRNA in comparison with patients carrying the A allele at -308 on day 1 (P = 0.02). Patients homozygous for the A allele at position -308 had a higher mortality than those carrying the G allele (P = 0.01). Our data are consistent with recent reports suggesting that a deficient proinflammatory response may be harmful in human sepsis. This deficient inflammatory response may be mediated in part by polymorphisms in the TNFalpha promoter.

journal_name

Int J Immunogenet

journal_title

International journal of immunogenetics

authors

O'Dwyer MJ,Mankan AK,Ryan AW,Lawless MW,Stordeur P,Kelleher D,McManus R,Ryan T

doi

10.1111/j.1744-313X.2008.00773.x

subject

Has Abstract

pub_date

2008-08-01 00:00:00

pages

279-85

issue

4-5

eissn

1744-3121

issn

1744-313X

pii

EJI773

journal_volume

35

pub_type

杂志文章

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