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en Correlation Between IL-13rs20541(A> G) Gene Polymorphism and Bronchial Asthma Among Iraqi Patients زیست شناسی ملکولی Molecular Biology مقالات اصلی Original Article <div style="text-align: justify;">Background: Bronchial asthma has a complicated genetic history. Changes in gene expression may be caused by gene polymorphism, cytokines play a central role. IL-13 is an interleukin that has been shown to play a role in the disease's immunopathogenesis. The current study investigated the relationship between rs20541 of the IL-13 gene and Bronchial asthma in Iraqi patients. Methods: Seventy-five patient and fifty healthy individuals as a control. The DNA was extracted from blood samples. Detection of genotype IL-13SNP (rs20541) were achieved by RFLP-PCR.  Results: indicated a highly significant the levels of the IgE, and IL-13 in the patients compared to control at (p value≤ 0.01), (456.45±290.106 vs. 30.08±24.414), (59.5980±20.93750 vs.6.7034±4.10547) pg/ml respectively. Result shows no significant differences in the frequency distributions of IL-13 SNP (rs20541) for all genotypes in cases and controls. A protective role of asthma, (OR: 0.62; CI.95%: 0.23 - 1.6) and (OR 0.89; CI.95%:0.42 - 1.89) were observed for wild type homozygous and heterozygous genotype respectively. Whereas the AA genotype (42.7%) in cases and (34.0%) in control, that (OR:1.44; CI.95%:( 0.66 - 3.07) mutant homozygous were risk factors of asthma among individuals. The genotypes of IL-13 rs20541 (GG, AG, AA) among patients and controls were significantly correlated with IgE and IL-13 results at (p≤ 0.05).  Conclusions: AA genotype in case and control mutant homozygous were risk factors of asthma among individuals. It’s possible that this has a predisposing impact on the development of asthma.</div> Bronchial Asthma, RFLP, IL-13, SNP 344 349 http://rbmb.net/browse.php?a_code=A-10-776-2&slc_lang=en&sid=1 Anwar Abdulla alhussainybio@yahoo.com 100319475328460012950 100319475328460012950 Yes Department of Biology, College of science, Babylon University, Iraq. Nagham Mahmood 100319475328460012951 100319475328460012951 No Department of Biology, College of science, Babylon University, Iraq.