T-Helper 1, T-Helper 2, and T-Regulatory Cytokines Gene Polymorphisms in Irritable Bowel Syndrome
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T-Helper 1, T-Helper 2, and T-Regulatory Cytokines Gene Polymorphisms in Irritable Bowel Syndrome Elham Barkhordari,1 Nima Rezaei,2 Mahdi Mahmoudi,1 Pegah Larki,2 Hamid Reza Ahmadi-Ashtiani,3,4 Bita Ansaripour,1 Maryam Alighardashi,1 Mohammad Bashashati,5 Ali Akbar Amirzargar,1 and Naser Ebrahimi-Daryani6,7
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
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