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  • Title: Influence of genetic variants of gamma interferon, interleukins 10 and 12 on Visceral Leishmaniasis in an endemic area, Iran.
    Author: Kalani M, Choopanizadeh M, Rasouli M.
    Journal: Pathog Glob Health; 2019 Feb; 113(1):14-19. PubMed ID: 30644801.
    Abstract:
    Visceral leishmaniasis (VL) is a life threatening disease in which a variety of cytokines regulating the immune responses can determine its outcome. As based on their region in the gene, some single nucleotide polymorphisms (SNP) can influence the expression of their corresponding proteins, this study aimed to investigate the association between SNP in the IL-10, IL-12, IFN-γ genes and susceptibility to VL. The study was carried out on 120 patients with VL, 67 patients' families (family group), and 102 healthy individuals with positive leishmanin skin test as positive control group. SNPs in IL-10 (-592, -819, -1082), IL-12 (+1188) were analyzed using PCR-RFLP and allele specific polymerase chain reaction (ASPCR) was used to analyze SNPs in IFN-γ (+874 A/T). The results showed that at position +874 of IFN-γ, AT genotype was significantly more frequent in patients than that in families and controls, but TT genotype was significantly more frequent in families than in patients. Distributions of IFN-γ alleles were not significantly different between the study groups. As for IL-12 and IL-10 genotypes and alleles, no significant difference was observed between the groups. Although a strong linkage disequilibrium was observed between alleles -592, -819 and -1082 of IL-10, distributions of the most common haplotypes and haplogenotypes reconstructed from IL-10 alleles were not significantly different between the study groups. It could be suggested that heritage of AT genotype at position +874 of IFN-γ may predispose and TT genotype can resist individual to VL in an endemic area in the southwest of Iran.
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