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  • Title: Significance of IL-1RA Polymorphism in Iranian Patients with Inflammatory Bowel Disease.
    Author: Daryani NE, Sadr M, Moossavi S, Shahkarami S, Soltani S, Farhadi E, Rezaei N.
    Journal: Dig Dis Sci; 2015 May; 60(5):1389-95. PubMed ID: 25466956.
    Abstract:
    BACKGROUND AND AIM: Interleukin (IL)-1 family members play an important role in the pathogenesis of inflammatory bowel disease (IBD). There are conflicting results regarding the association of IL-1 gene cluster single nucleotide polymorphisms (SNPs) with IBD and its clinical features. The aim of this study was to examine IL-1α -889 C/T, IL-1β -511 C/T, IL-1β +3962 C/T, IL-1R Pst-I1970 C/T, and IL-1RA Mspa-I11100 C/T SNPs in Iranian patients. METHODS: In this study, SNPs of IL-1 family members were investigated in 75 patients with IBD (40 CD and 35 UC), using polymerase chain reaction with sequence-specific primers method. RESULTS: IL-1β -511 CC genotype was significantly less present in UC compared to controls, while IL-1RA Mspa-I11100 CC was significantly associated with both Crohn's disease (CD) and ulcerative colitis (UC). IL-1α -889 TT genotype was more frequently associated with extraintestinal manifestations. A significant association was observed between IL-1β +3962 TT genotype and the disease activity in IBD. IL-1RA Mspa-I11100 CC was significantly less frequent in CD patients who need immunosuppressive therapy. IL-1RA Mspa-I11100 CT was associated with earlier age of onset in IBD, while TT genotype was associated with higher age of onset in IBD. CONCLUSIONS: IL-1 SNPs seem to be associated with IBD and could affect the disease severity as well.
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