Abstract
Tuberculosis (TB) is an intricate infectious disease that causes a large number of deaths in the population. Interleukin (IL)-6 and IL-13 play functional roles in host resistance to Mycobacterium tuberculosis infection. Our aim in this study was to explore the association of IL-6 and IL-13 polymorphisms with TB susceptibility in the Western Chinese Han population. The case and control groups comprised 900 TB patients and 1534 healthy controls, respectively, and four single-nucleotide polymorphisms (SNPs) were genotyped in IL-6 and five SNPs in IL-13 through the improved multiplex ligation detection reaction method. We found no genetic variants in the IL-6 or IL-13 genes that were related to TB susceptibility in the analysis of alleles, genotypes, genetic models, and TB clinical subtypes, except for a trend toward low pulmonary tuberculosis and extrapulmonary tuberculosis susceptibility for the SNPs rs1295686 and rs20541. Our study did not find a link between IL-6 and IL-13 polymorphisms and TB susceptibility in the Western Chinese Han population. Therefore, our present data revealed the challenge of applying IL-6 and IL-13 SNPs as genetic markers for TB and that increased sample sizes and additional races are needed for further studies.
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