title: Cytokine single nucleotide polymorphisms in Iranian populations.
abstract: Cytokines are important immunomodulatory molecules involved in immune responses against microorganisms; they also have an important role in the setting of immune system disorders. Cytokine single nucleotide polymorphisms have been extensively studied in different, normal populations as well as in association with disease. Cytokine gene polymorphisms are potentially important as genetic predictors of disease susceptibility, clinical outcome, and as a tool for anthropological studies. In this study, samples have been collected from 455 healthy individuals located in different regions of Iran (Tehran, Yazd, Sistan and Balochistan). Allele and genotype frequencies of cytokine SNP, including: IL-1alpha, IL-1beta, IL-1R, IL-1RA, IL-2, IL-4, IL-4RA, IL-6, IL-10, IL-12, TNF-alpha, TGF-beta and IFN-gamma were investigated, using the PCR-SSP method. Allele frequencies in Tehran and Yazd populations were similar, except for TGF-beta. Allele frequencies in Sistani & Baloch populations were similar at all positions, except for IL-1beta at position of -511 and IFN-gamma genes at position UTR5644; there were some differences in allele frequencies comparing these populations with the Yazd population, including: IL-4, IL-6, IL-10, TGF-beta and TNF-alpha. Although some significant differences were observed for some cytokines, it seems that the cytokine gene polymorphism profile of the Iranian population is similar to that of Caucasians, particularly the Italian population.
authors.affiliation: Immunogenetic Laboratory, Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Iran. amirzargar_ali@yahoo.com
authors.forename: Ali Akbar
authors.initials: AA
authors.lastname: Amirzargar
authors.forename: Mehrnaz
authors.initials: M
authors.lastname: Naroueynejad
authors.forename: Farideh
authors.initials: F
authors.lastname: Khosravi
authors.forename: Seyed Saied
authors.initials: SS
authors.lastname: Dianat
authors.forename: Saied
authors.initials: S
authors.lastname: Dianat
authors.forename: Nima
authors.initials: N
authors.lastname: Rezaei
authors.forename: Joannis
authors.initials: J
authors.lastname: Mytilineos
authors.forename: Behrouz
authors.initials: B
authors.lastname: Nikbin
mesh_terms: D000483:Alleles; D016207:Cytokines / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D014644:Genetic Variation; D005828:Genetics, Population; D005838:Genotype; D006801:Humans; D007492:Iran; D008297:Male; D008954:Models, Biological; D011110:Polymorphism, Genetic; D020641:Polymorphism, Single Nucleotide; D018807:Polymorphism, Single-Stranded Conformational
chemical_list: D016207:Cytokines