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The NRAMP1, VDR, TNF-α, ICAM1, TLR2 and TLR4 gene polymorphisms in Iranian patients with pulmonary tuberculosis: A case-control study
Authors
S. Anoosheh
P. Farnia
+5 more
M. Jafari
M.R. Nasiri
R. Sanaei
A. Sepanjnia
N. Tajik
Publication date
1 January 2016
Publisher
Abstract
The innate immune response drives early events in Mycobacterium tuberculosis infection. Since human genetic variation is an important determinant in the outcome of infection with M. tuberculosis, we typed polymorphisms in the innate immune molecules, such as natural-resistance-associated macrophage protein 1 (NRAMP1), Vitamin D receptor (VDR), Tumor necrosis factor alpha (TNF-α), intercellular adhesion molecule1 (ICAM-1), Toll-like receptor 2 (TLR2) and Toll-like receptor 4 (TLR4) in a case-control study of pulmonary tuberculosis in Iranian population. We conducted an association study and included 96 patients and 122 matched healthy individuals. We used single ARMS-PCR technique to simultaneously genotype fourteen polymorphisms in this survey. Among all fourteen polymorphisms that were examined, three polymorphisms were significantly different between case and control groups. The TNF - 308A polymorphism showed significant increase in allele and genotype frequencies among patients compared to control individuals - 308A allele: 19.3 vs. 9.4%, GA genotype: 28.1 vs. 17.2%, AA genotype: 5.2 vs. 0.8%; Corrected P (Pc) <. 0.05, and the TLR4 variant allele and genotypes prevalence (D299G and T399I) were significantly higher among patients compared to controls DG genotype: 14.6 vs. 5.7%, Pc< 0.05 and I399 allele: 4.2 vs. 0.8%, TI genotype: 8.3 vs. 1.6%; Pc< 0.05, respectively. In conclusion, our data suggest that TLR4 (D299G and T399I) and TNF (- 308G/A) genetic polymorphisms may influence the risk of developing tuberculosis after exposure to Mycobacterium. © 2016 Elsevier B.V
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Last time updated on 10/10/2019