title: Meta-analysis of TNF-alpha promoter -308 A/G polymorphism and SLE susceptibility.
abstract: Alleles of tumor necrosis factor-alpha (TNF-alpha) gene have been inconsistently associated with systemic lupus erythematosus (SLE), particularly the 308-A/G functional promoter polymorphism. To generate large-scale evidence on whether 308-A/G promoter polymorphism is associated with SLE susceptibility we have conducted a meta-analysis. We have identified 21 studies of this polymorphism and SLE using MEDLINE search. Meta-analysis was performed for genotypes A/A (recessive effect), A/A+A/G (dominant effect), and A allele in fixed or random effects models. All control samples were in Hardy-Weinberg proportion. The overall odds ratio (OR) of the A/A genotype was 3.2 (95% CI=2.0-5.3, P<0.001). Stratification by ethnicity indicated that the A/A genotype was associated with SLE in European-derived population (OR=4.0, CI=2.5-6.4, P<0.001). No association was detected in Asian-derived population (OR, 1.3, CI=0.3-6.3, P=0.76). The overall OR for the risk genotypes (A/A and A/G) was 2.0 (CI=1.3-3.1, P<0.001). Similar results were found between the risk allele A and SLE where a significant association was found in European population (OR=2.1, CI=1.6-2.7, P<0.001), but not in Asian (OR=1.4, CI=0.8-2.3, P=0.2) or African (OR=1.2, CI=0.6-2.5, P=0.59) populations. In summary, this meta-analysis demonstrates that the TNF-alpha promoter -308 A/G polymorphism may confer susceptibility to SLE, especially in European-derived population.
authors.affiliation: Division of Rheumatology, Korea University, Seoul, Korea.
authors.forename: Young Ho
authors.initials: YH
authors.lastname: Lee
authors.forename: John B
authors.initials: JB
authors.lastname: Harley
authors.forename: Swapan K
authors.initials: SK
authors.lastname: Nath
mesh_terms: D000483:Alleles; D044466:Asian People; D044383:Black People; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000235:genetics*; D015233:Models, Statistical; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic; D012307:Risk Factors; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics*; D044465:White People
chemical_list: D014409:Tumor Necrosis Factor-alpha