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  • Title: Association between polymorphisms of the IKZF3 gene and systemic lupus erythematosus in a Chinese Han population.
    Author: Cai X, Qiao Y, Diao C, Xu X, Chen Y, Du S, Liu X, Liu N, Yu S, Chen D, Jiang Y.
    Journal: PLoS One; 2014; 9(10):e108661. PubMed ID: 25271777.
    Abstract:
    OBJECTIVE: It has been reported that IKAROS family of zinc finger 3 (IKZF3)-deficient mice spontaneously develop human systemic lupus erythematosus (SLE)-like phenotypes and produce anti-dsDNA Ab leading to immune complex-mediated glomerulonephritis. Polymorphism of the IKZF3 gene corresponds with the susceptibility to several immune-related diseases. Our intention was to establish an association between polymorphisms in the IKZF3 gene and SLE in the Chinese Han population. METHODS: The study involved obtaining blood samples for DNA extraction and genotyping the 4 selected single-nucleotide polymorphisms (SNPs) in IKZF3, including rs12150079, rs9909593, rs907091, and rs2872507, by performing PCR restriction fragment length polymorphism analysis (PCR-RFLP). A group of 366 SLE patients were compared to 455 healthy controls. RESULTS: A significant decrease in frequencies of the rs907091 CC genotype and C allele appeared in the SLE patients unlike that observed in the controls (p = 0.001 and 0.015, respectively). The frequencies of the rs12150079 genotype and allele were different between the SLE patients and the control individuals, although the significance was only marginal (p = 0.046 and 0.049, respectively). In addition, a significantly low frequency of the GGCG haplotype was observed in the SLE patients, suggesting that it may provide protection against SLE (p = 0.011). CONCLUSION: To the best of our knowledge, this is the first study to demonstrate an important association between polymorphisms in IKZF3 and SLE in the Chinese Han population. A strong association between rs907091 in the IKZF3 gene and SLE was identified.
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