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en The Role of Interleukin-4 and 13 Gene Polymorphisms in Allergic Rhinitis: A Case Control Study ایمنی شناسی Immunology مقالات اصلی Original Article <div style="text-align: justify;">Background: Allergic Rhinitis (AR) is an IgE-mediated inflammatory disorder with high morbidity rates. The eitiology of this disease is understood to occur from a complex interaction between genetic and environmental factors. T helper type 2 cells have been shown to have a crucial role in atopic disease due to their production of the cytokines, intelukin (IL)-13 and IL-4, involved in inflammation. Research has shown single nucleotide polymorphisms (SNP) of the IL-13 and IL-4 genes to be associated increased levels of IgE and with allergic diseases such as, allergic rhinitis, asthma, and atopic dermatitis. Specifically, the rs2243250 SNP of IL-4 and the rs20541 SNP of IL-13 have been shown to be associated with AR. Methods: A case-control study was designed to investigate the relationship between the two SNPs rs2243250 and rs20541 with the incidence of AR. The SNPs were examined in patients with AR and healthy controls (86 patients and 86 controls). Blood samples were collected and DNA was extracted to evaluate the SNPs by RFLP-PCR. Results: Recessive analysis model of the IL-13 gene (GG vs. AA+AG) revealed that the GG genotype was more common in AR patients (P=0.36) )OR=0.8 [81% CI 0.38-1.6]). For the IL-4 gene (TC vs. TT+CC), the TC genotype was more common in AR patients (P = 0.0022)) OR=0.71 [60% CI 1.41-5.02]). Furthermore, in the IL-4 gene, the 590 T>C polymorphism had a significant association with AR. However, no association was found between AR and the IL-13 rs20541 polymorphism. Conclusions: Our findings suggest that the IL-13 polymorphism (rs20541, Exo 4, G>A, Arg130Gln) and IL-4 polymorphism (rs2243250= C-590T, promoter, T>C) are co-associated with AR and sensitivity to aeroallergens. However, this study used a cohort of AR patients and healthy controls from the northeast of Iran. Given the influence of ethnicity and environment on genetics, further investigation is needed to elucidate the role of SNPs in IL-4 and IL-13 in AR among different populations.  </div> Allergic rhinitis, Interleukin 4, Interleukin 13, Single nucleotide polymorphism 111 118 http://rbmb.net/browse.php?a_code=A-10-223-1&slc_lang=en&sid=1 Afshin Shirkani shirkani.afshin@outlook.com 100319475328460017226 100319475328460017226 No Allergy and clinical immunology department, school of medicine, Blusher University of medical science, Blusher Iran. Atena Mansouri mansouria932@mums.ac.ir 100319475328460017227 100319475328460017227 No Nanotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran & Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran. Reza Farid Hosseini FaridhosseiniR@mums.ac.ir 100319475328460017228 100319475328460017228 No Allergy Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. Farahzad Jabbari Azad JabbariF@mums.ac.ir 100319475328460017229 100319475328460017229 No Allergy Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. Reihaneh Alsadat Mahmoudian mahmoudianr951@mums.ac.ir 100319475328460017230 100319475328460017230 No Immunology Research Center, Mashhad University of medical Sciences, Mashhad, Iran. Mehdi Montazer mehdi.montazer@gmail.com 100319475328460017231 100319475328460017231 No Department of Pathology Shiraz University of Medical Sciences, Shiraz, Iran. Abdolreza Samimi 100319475328460017232 100319475328460017232 No Department of Anesthesiologie and prehospital emergency and intensivmedicine and pain, St. Et. Elisabeth Hospital Dorsten, KKRN, Westfalen Wilhelm University Munster, Germany. Amir Abbas Momtazi-Borojeni 100319475328460017233 100319475328460017233 No Student Research Committee, Nanotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran. & Department of Medical Biotechnology, Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. Mohammad Reza Abbaszadegan Abbaszadeganmr@mums.ac.ir 100319475328460017234 100319475328460017234 Yes Medical Genetics Research Center, Faculty of Medical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran Mehran Gholamin 100319475328460017235 100319475328460017235 No Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.