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. 2006 May 4:6:82.
doi: 10.1186/1471-2334-6-82.

The interferon gamma gene polymorphism +874 A/T is associated with severe acute respiratory syndrome

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The interferon gamma gene polymorphism +874 A/T is associated with severe acute respiratory syndrome

Wai Po Chong et al. BMC Infect Dis. .

Abstract

Background: Cytokines play important roles in antiviral action. We examined whether polymorphisms of IFN-gamma,TNF-alpha and IL-10 affect the susceptibility to and outcome of severe acute respiratory syndrome (SARS).

Methods: A case-control study was carried out in 476 Chinese SARS patients and 449 healthy controls. We tested the polymorphisms of IFN-gamma,TNF-alpha and IL-10 for their associations with SARS.

Results: IFN-gamma +874A allele was associated with susceptibility to SARS in a dose-dependent manner (P < 0.001). Individuals with IFN-gamma +874 AA and AT genotype had a 5.19-fold (95% Confidence Interval [CI], 2.78-9.68) and 2.57-fold (95% CI, 1.35-4.88) increased risk of developing SARS respectively. The polymorphisms of IL-10 and TNF-alpha were not associated with SARS susceptibility.

Conclusion: IFN-gamma +874A allele was shown to be a risk factor in SARS susceptibility.

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