Abstract
The aim of this study was to investigate genetic polymorphisms of DNase IV and their relationship with SLE and various autoantibodies present in SLE patients. A total of 532 SLE patients and 521 healthy controls belonging to the Korean population were enrolled into this study. Sequencing of the entire coding region of the DNase IV gene (including the promoter region) was carried out using a DNA analyser. Autoantibodies including anti-Sm, anti-Ro, anti-La, anti-RNP and anti-dsDNA were determined either by indirect immunofluorescence or double immunodiffusion methods. Multiple logistic regression analysis was performed to examine the genetic association with SLE and autoantibodies. We found three single-nucleotide polymorphisms (SNPs): -2753G-->A, +147T-->G (Gly49Gly) and +1466G-->T. The -2753G-->A and +147T-->G (Gly49Gly) SNPs were selected for larger scale genotyping based on linkage disequilibria and haplotype-tagging status. Although the -2753G-->A SNP was more common than the +147T-->G (Gly49Gly) SNP (frequencies: 0.330 and 0.002, respectively), its association with the risk of SLE was not statistically significant. However, -2753G-->A SNP was significantly associated with the production of anti-Sm antibody [odds ratio (95% ...Continue Reading
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