TNF-alpha Gene Polymorphisms in Iranian Azari Turkish Patients with Inflammatory Bowel Diseases

Overview

Journal Saudi J Gastroenterol

Specialty Gastroenterology

Date 2014 Apr 8

PMID 24705148

Citations 7

Authors

Mortaza Bonyadi

Reza Abdolmohammadi

Zohreh Jahanafrooz

Mohammad-Hosein Somy

Manoochehr Khoshbaten

Affiliations

Soon will be listed here.

Abstract

Context: Crohn's disease (CD) and ulcerative colitis (UC) are chronic inflammatory diseases of the bowel (IBD) whose causes are not fully known. Emerging data indicate that alterations in cytokine synthesis may play a role in IBD pathogenesis.

Aims: We aimed to determine the association between tumor necrosis factor-alfa (TNFα) promoter polymorphisms (at positions - 308 and - 1031) and susceptibility to IBD among Iranian Azari Turkish patients.

Settings And Design: One hundred and one patients with IBD and 100 healthy subjects were analyzed.

Materials And Methods: Both polymorphisms in the promoter region of the TNFα gene at positions -1031T/C and -308G/A were detected by polymerase chain reaction-restriction fragment length polymorphism assay. All statistical analyses were calculated with SPSS for Windows 16.0. The Fisher's exact test was used to test for departure from Hardy-Weinberg equilibrium of the genotype frequencies (P > 0.05).

Results: The allele frequency of the TNFα-308G and -1031T were higher in IBD patients but did not reach statistical significance. However, the homozygous TT genotype for the SNP-1031 T > C was significantly higher in UC patients than in healthy controls (P = 0.01) and the heterozygous CT genotype for the SNP -1031 T > C was significantly lower in UC patients than in healthy controls (P = 0.03).

Conclusions: The TNFα-1031 T allele confers a significant risk for developing UC in Iranian Azeri Turkish patients. Also the frequency of TNFα-1031 C allele was considerably low among patients with UC and it may have protective role among them (OR = 0.43; P = 0.01).

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