Association of Interleukin-10 gene polymorphisms with ankylosing spondylitis

Chengyu Lv; Yingzheng Wang; Jinqin Wang; Haining Zhang; Hao Xu; Dianliang Zhang
December 2011
Clinical & Investigative Medicine;Dec2011, Vol. 34 Issue 6, pE370
Academic Journal
Objective: Genetic polymorphisms of the Interleukin-10 (IL-10) promoter have been implicated in several autoimmune diseases, including seronegative spondyloarthropathies. This study investigated whether single nucleotide polymorphisms (SNPs) and haplotypes of IL-10 are associated with ankylosing spondylitis (AS), a common subtype of spondyloarthritis (SpA). Methods: The serum levels of IL-10 were measured with an enzyme-linked immunosorbent assay (ELISA). The single nucleotide polymorphisms (SNPs) at positions - 1082A/ G, -819C/T and -592C/A in the IL-10 gene promoter were analyzed using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Results: 110 AS patients and 120 ethnic-matched healthy controls were included in this study. The serum levels of IL-10 were significantly higher in AS patients than healthy controls (Z=-10.9, P<0.001). Single SNP analysis showed no significant differences in the allelic and genotypic frequencies of -592A/C between the AS patients and healthy controls. No -1082GG genotype was found in this study. An increased frequency of -1082G allele was noted in AS patients (P=0.047). In a logistic regression analysis, the -1082AG genotype was associated with an odds ratio of 1.993 (95%CI, 1.046-3.800, P=0.034) for AS. And the -819CC genotype was associated with an odds ratio of 3.125 (95%CI, 1.246-7.836, P=0.015) for AS. Furthermore, haplotype analysis revealed that GCC haplotype was associated with a significantly increased risk of AS as compared with the ATA haplotype (OR=2.19; 95% CI, 1.13-4.26; P=0.02). Conclusion: Our results indicate that the gene haplotype of IL-10 can contribute to the susceptibility to AS in a Chinese population.


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