Abstract
Background: Genetic factors are involved in the etiology of Mycobacterium tuberculosis infection. Recently, ALOX5 has been identified as a candidate gene for tuberculosis (TB) susceptibility. We investigated whether an association between ALOX5 and TB exists in a Chinese pediatric population from northern China. Methods: We conducted a case-control study comprising 488 individuals aged 2 months to 17 years by genotyping 18 tag-single-nucleotide polymorphisms (SNPs) from the ALOX5 gene. The tag-SNPs were selected from the international HapMap project. An Illumina BeadXpress Scanner was utilized for genotyping, supported by the high-density BeadArray technology in combination with an allele-specific extension, adapter ligation, and amplification assay. Statistical analyses were performed to determine correlations between genetic variation and disease. Results: Our study is the first to show that ALOX5 is associated with susceptibility to pediatric TB in a subset of children in northern China. The rs2115819 T allele of ALOX5 presents a risk factor for childhood TB disease.
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