Authors: Movahedi, Masoud¹; Mahdaviani, Seyed Alireza¹; Rezaei, Nima¹; Moradi, Batoul²; Dorkhosh, Shahin²; Amirzargar, Ali Akbar³

Source: Journal of Asthma, Volume 45, Number 9, November 2008 , pp. 790-794(5)

Publisher: Informa Healthcare

Abstract:

Asthma is a complex respiratory disease, characterized by airway inflammation and reversible airway obstruction. Both genetic and environmental factors are important in the development and expression of the disease. In order to analyze the genetic profile of Th1 and Th2 cytokines in Iranian asthmatic patients, this study was performed. The allele and genotype frequencies of a number of polymorphic genes coding for IL-10, TGF-ss, IL-2, IL-12, and IFN-γ were investigated in 60 patients with asthma in comparison with 140 controls. The most frequent genotypes in our patients were IL-10 GA at position-1082 (p = 0.001), IL-10 CT at position -819 (p = 0.001), IL-10 CA at position -592 (p = 0.0001), IL-12 CA at position -1188 (p = 0.003), TGF-ss CG at codon 25 (p = 0.002), IL-2 GT at position -330 (p = 0.004). In contrast, the frequencies of the genotypes IL-10 AA at position -1082 (p = 0.0001) and GG at position -1082 (p = 0.01), IL-10 CC at position -819 (p = 0.001) and TT at position -819 (p = 0.01), TGF-ss TT at codon 10 (p = 0.001), TGF-ss GG at codon 25 (p = 0.005), IL-12 AA at position -1188 (p = 0.004), IL-2 TT at position -330 (p = 0.01) were significantly lower in the patient group. The most frequent haplotypes in the patients were IL-10 GCC (p = 0.008) and ATA (p = 0.0001) at position -1082, -819, -592, and TGF-ss CC (p = 0.036) at codon 10 and codon 25. In contrast, the frequencies of the IL-10 ACC (p = 0.001), TGF-ss TG (p = 0.024), and IL-2 TT (p = 0.001) and GT (p= 0.0001) in the patients were significantly lower than controls. Considering the high frequency of presence of IL-10 ATA haplotype and the IL-2 GT genotype, it seems that the production of IL-10 and IL-2 in the asthmatic patients could be lower than normal subjects.

Keywords: asthma; cytokine; genetic polymorphism

Document Type: Research article

DOI: http://dx.doi.org/10.1080/02770900802207261

Affiliations: 1: Department of Allergy and Clinical Immunology of Children's Medical Center Hospital, Immunology, Asthma and Allergy Research Institute, Medical Sciences/University of Tehran, Tehran, Iran 2: Immunogenetic Laboratory, Department of Immunology, School of Medicine, Medical Sciences/University of Tehran, Tehran, Iran 3: Immunogenetic Laboratory, Department of Immunology, School of Medicine, Medical Sciences/University of Tehran, Tehran, Iran,Molecular Immunology Research Center, Medical School, Medical Sciences/University of Tehran, Tehran, Iran

Publication date: 2008-11-01

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