The NRAMPI, VDR and TNF-alpha gene polymorphisms in Iranian tuberculosis patients: the study on host susceptibility.

The natural resistance-associated macrophage protein (NRAMP1), Vitamin-D receptor (VDR) and Tumor necrosis factor (TNF-alpha) have been associated in susceptibility to tuberculosis, but the results have been inconsistent. This study aimed to determine the association of NRAMP1, VDR, and TNF-á variant with development of pulmonary tuberculosis (PTB) among Iranian patients. The single nucleotide polymorphisms (SNPs) at INT4, D543, 3'UTR of NRAMP1 gene, SNPs in restriction sites of BsmI, and FokI of the VDR gene and SNPs of TNF-alpha at -238,-308, -244,857,-863 positions were analyzed by PCR-RFLP among two groups of individual; patients with PTB (n=117) and healthy controls (n=60).