Interleukin-21 gene polymorphism rs2221903 is associated with disease activity in patients with rheumatoid arthritis
نویسندگان
چکیده
INTRODUCTION Interleukin-21 (IL-21) is a cytokine which plays a significant role in the pathogenesis and disease activity of rheumatoid arthritis (RA). Genetic polymorphisms in the IL-21 gene may alter the synthesis of IL-21. The aim of this study was to examine IL-21 and IL-21R polymorphisms in patients with RA. MATERIAL AND METHODS We examined 422 patients with RA and 338 healthy controls. Single nucleotide polymorphisms (SNPs) within the IL-21 (rs6822844 G>T, rs6840978 C>T, rs2221903 T>C) and IL-21R (rs2285452 G>A) genes were genotyped using TaqMan genotyping assays. RESULTS There were no statistically significant differences in the distribution of studied genotypes and alleles between RA patients and the control group. To examine whether IL-21 polymorphisms affect disease activity in RA patients, we compared the distribution of IL-21 genotypes between patients with DAS28 ≤ 2.5 (patients with remission of disease symptoms) and patients with DAS28 > 2.5 (patients with active RA). Among patients with DAS28 > 2.5, increased prevalence of rs2221903 CT and CC genotypes was observed (OR = 1.54; 95% CI: 1.04-2.28; p = 0.035). CONCLUSIONS The results of this study suggest that IL-21 and IL-21R gene polymorphisms are not risk loci for RA susceptibility, whereas the IL-21 rs2221903 polymorphism is associated with disease activity.
منابع مشابه
Association of IL-10 rs1800896 (-1082 G/A) gene polymorphism and susceptibility to rheumatoid arthritis (RA) in Northeast of Iran
Background and objectives: Rheumatoid arthritis (RA) is a complex and systemic inflammatory disease in which the immune response is disturbed. Single nucleotide polymorphisms (SNPs) in the promoter regions of regulatory cytokines including interleukin-10 (IL-10) may lead to exacerbated immune response and increased risk of RA. Here, we aimed to assess the association of IL-10 -1082 (G/A) (rs180...
متن کاملAssociation of PTPN22 rs2476601 Polymorphism with Rheumatoid Arthritis and Celiac Disease in Khuzestan Province, Southwestern Iran
Background: Single-nucleotide polymorphism (SNP) rs2476601 within protein tyrosine phosphatase non-receptor type 22 gene (PTPN22) has been shown to be a risk factor for different autoimmune diseases. This study explored the association of 1858 C/T SNP with rheumatoid arthritis (RA) and celiac disease (CD) in a region covering south-west of Iran. Methods: Totally, 52 patients with CD, 120 patien...
متن کاملCD226 rs763361 (Gly307Ser) Polymorphism Is Associated with Susceptibility to Rheumatoid Arthritis in Zahedan, Southeast Iran
Background: Rheumatoid arthritis (RA) is a chronic inflammatory disease with many genetic factors predisposing to disease susceptibility. The aim of the present study was to investigate the impact of CD226 rs727088 and rs763361 polymorphisms and susceptibility to RA in a sample of the Iranian population. Methods: This case-control study was carried out on 100 patients with RA and 104 healthy su...
متن کاملThe Association between Depression and vitamin D level with disease activity in patient with rheumatoid arthritis
Introduction: Rheumatoid arthritis (RA) is a chronic rheumatologic disease, affecting different aspects of patient life. Although several studies have reported a higher rate of depression among patients with RA, there is still controversy over the underlying risk factors and probable covariates of depression in these individuals. The present study investigated the relationship between disease a...
متن کاملLack of Association between PTPN22 (+1858 C>T) rs2476601 polymorphism and susceptibility to rheumatoid arthritis (RA) in Northeast of Iran
Background and objectives: Rheumatoid arthritis (RA) is an autoimmune disease with a complex genetic background. The protein tyrosine phosphatase non-receptor type 22 (PTPN22) is a lymphoid specific protein tyrosine phosphatase which is involved in negative regulation of T cell response. Several studies have assessed the association between PTPN22 single nucleotide polymorphisms (SNPs) with RA ...
متن کامل