Abstract
Inflammation and mucosal immune system activation have an important role in irritable bowel syndrome (IBS), whereas genetic factors can control some immunological mediators. In this study, a number of polymorphic genes coding for T-helper 1, T-helper 2, and T-regulatory cytokines were genotyped in 71 patients with IBS, and the results were compared with controls. IL-4 CC genotype at position −590, IL-4 TT genotype at position −33, and IL-10 GA genotype at position −1082 were significantly overrepresented in the patients with IBS in comparison with controls (P < 0.001). The frequencies of the following haplotypes in the patient group were significantly higher than in the control group: IL-2 (−330, +160) GT haplotype (P = 0.002), IL-4 (−1098, −590, −33) TCC haplotype (P < 0.001), and TCT haplotype (P < 0.001). While production of cytokines could be affected by genetic polymorphisms within coding and promoter regions of cytokine genes, IL-4 and IL-10 gene polymorphisms could affect individual susceptibility to IBS.
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This research has been supported by Tehran University of Medical Sciences and Health Services grant. The authors are very grateful for all colleagues in the Department of Immunology, School of Medicine, Tehran University of Medical Sciences for their kind help and advice in the laboratory, and all the patients and their families for their kind collaboration in this study.
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Barkhordari, E., Rezaei, N., Mahmoudi, M. et al. T-Helper 1, T-Helper 2, and T-Regulatory Cytokines Gene Polymorphisms in Irritable Bowel Syndrome. Inflammation 33, 281–286 (2010). https://doi.org/10.1007/s10753-010-9183-6
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DOI: https://doi.org/10.1007/s10753-010-9183-6