Proinflammatory cytokine gene polymorphisms in irritable bowel syndrome

Barkhordari, E. and Rezaei, N. and Ansaripour, B. and Larki, P. and Alighardashi, M. and Ahmadi-Ashtiani, H.R. and Mahmoudi, M. and Keramati, M.-R. and Habibollahi, P. and Bashashati, M. and Ebrahimi-Daryani, N. and Amirzargar, A.A. (2010) Proinflammatory cytokine gene polymorphisms in irritable bowel syndrome. Journal of Clinical Immunology, 30 (1). pp. 74-79.

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Introduction: Irritable bowel syndrome (IBS) is a multifactorial functional gastrointestinal disorder, characterized by recurrent abdominal pain and altered bowel habits. Proinflammatory cytokines can play an important role in intestinal inflammation, while their production is under genetic control. Methods: This study was performed in a group of patients with IBS to analyze the genotype frequencies of a number polymorphic genes coding for proinflammatory cytokine (interleukin-6 (IL), tumor necrosis factor-alpha (TNF-α), and IL-1 group). Using polymerase chain reaction with sequence-specific primers method, the cytokine genes were amplified, and alleles and genotypes of 71 patients with IBS were detected on gel electrophoresis, and the results were compared with healthy control subjects. Results: Results of the analyzed data showed that the frequencies IL-1R C allele at position Pst-I 1970 (P = 0.017), IL-6 G allele at position -174 (P = 0.002), and TNF-α G allele at position -238 (P < 0.001) in the patient group were significantly higher than the control group. IL-6 GG genotype (-174) and TNF-α GG genotype (-238) in the patient group were also significantly overrepresented (P < 0.001), while IL-6 CG genotype (-174) and TNF-α GA genotype (-238) were significantly decreased in the patients with IBS (P < 0.001). The frequencies of IL-6 (-174, nt565) GG haplotype and TNF-α (-308, -238) GG haplotype were also significantly higher in the patient group (P < 0.001), whereas the frequencies of the haplotypes IL-6 CG and TNF-α GA were significantly decreased in the patients with IBS (P < 0.001). Conclusion: IL-6 and TNF-alpha proinflammatory cytokine gene polymorphisms could change individual susceptibility to IBS and might have a role in pathophysiology of disease. © 2009 Springer Science+Business Media, LLC.

Item Type: Article
Additional Information: cited By 66
Uncontrolled Keywords: cytokine; interleukin 1; interleukin 1 receptor; interleukin 1alpha; interleukin 1beta; interleukin 6; tumor necrosis factor alpha, adult; allele; article; controlled study; cytokine production; DNA polymorphism; female; gel electrophoresis; gene frequency; genotype; haplotype; human; irritable colon; major clinical study; male; polymerase chain reaction; priority journal, Adult; DNA Mutational Analysis; Female; Gene Frequency; Genetic Association Studies; Genetic Predisposition to Disease; Genotype; Haplotypes; Humans; Interleukin-1; Interleukin-6; Iran; Irritable Bowel Syndrome; Male; Middle Aged; Polymorphism, Genetic; Tumor Necrosis Factor-alpha
Subjects: WI Digestive System
QW Microbiology. Immunology
Depositing User: s shekarchi shekarchi
Date Deposited: 05 Aug 2020 05:38
Last Modified: 05 Aug 2020 05:38

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