OBJECTIVE AND BACKGROUND: Polymorphisms in the natural resistance-associated macrophage protein gene 1 (NRAMP1) and tumour necrosis factor (TNF)-alpha gene have been found to be associated with susceptibility to tuberculosis in different populations. However, the results are inconsistent. This study aimed to determine whether NRAMP1 and TNF-alpha variants are associated with tuberculosis in Thais. METHODS: Polymorphisms of NRAMP1 at INT4, D543N and the 3' untranslated region, and of TNF-alpha at +488, -238, and -308, were examined in 149 tuberculosis patients and 147 healthy controls. PCR using sequence-specific oligonucleotides and sequence-specific priming were used to genotype the NRAMP1 and TNF polymorphisms, respectively. RESULTS: There were no significant differences in the distribution of the genotype frequencies for the NRAMP1 and TNF-alpha polymorphisms between the patients and controls. CONCLUSIONS: The NRAMP1 and TNF-alpha genes are not associated with susceptibility to tuberculosis in Thais.
OBJECTIVE AND BACKGROUND: Polymorphisms in the natural resistance-associated macrophage protein gene 1 (NRAMP1) and tumour necrosis factor (TNF)-alpha gene have been found to be associated with susceptibility to tuberculosis in different populations. However, the results are inconsistent. This study aimed to determine whether NRAMP1 and TNF-alpha variants are associated with tuberculosis in Thais. METHODS: Polymorphisms of NRAMP1 at INT4, D543N and the 3' untranslated region, and of TNF-alpha at +488, -238, and -308, were examined in 149 tuberculosispatients and 147 healthy controls. PCR using sequence-specific oligonucleotides and sequence-specific priming were used to genotype the NRAMP1 and TNF polymorphisms, respectively. RESULTS: There were no significant differences in the distribution of the genotype frequencies for the NRAMP1 and TNF-alpha polymorphisms between the patients and controls. CONCLUSIONS: The NRAMP1 and TNF-alpha genes are not associated with susceptibility to tuberculosis in Thais.
Authors: Sasijit Vejbaesya; Panpimon Luangtrakool; Komon Luangtrakool; Siripen Kalayanarooj; David W Vaughn; Timothy P Endy; Mammen P Mammen; Sharone Green; Daniel H Libraty; Francis A Ennis; Alan L Rothman; Henry A F Stephens Journal: J Infect Dis Date: 2009-05-15 Impact factor: 5.226