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FEMS Immunol Med Microbiol. 2009 Dec;57(3):229-35. doi: 10.1111/j.1574-695X.2009.00602.x. Epub 2009 Aug 21.

Association between the -159C/T CD14 gene polymorphism and tuberculosis in a Korean population.

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1
Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea.

Abstract

The aim of the present study was to confirm the association between the CD14-159C/T polymorphism and tuberculosis in the Korean population and to elucidate the functional basis for this putative association. CD14-159C/T genotypes were determined by PCR - restriction fragment length polymorphism analysis in 274 tuberculosis patients and 422 healthy controls. Recombinant CD14 promoter-luciferase reporter constructs, including the -159T or -159C allele, were transfected into K562 and BEAS-2B cells, and luciferase activities were measured and compared. Levels of serum sCD14 and interferon-gamma secreted by peripheral blood mononuclear cells (PBMCs) were measured using enzyme-linked immunosorbent assay.The frequency of -159TT genotypes was higher in tuberculosis patients than in healthy controls. The promoter activity of the -159T allele was higher than that of the -159C allele. Serum sCD14 levels were higher among tuberculosis patients with -159TT genotypes than among those with -159CC genotypes and interferon-gamma release by PBMCs was decreased in subjects with -159TT genotypes. In conclusion, the -159TT CD14 genotypes were associated with tuberculosis development in Koreans. This association might be a result of the higher promoter activity of the -159T allele, the higher level of sCD14, and the decreased interferon-gamma secretion in subjects with -159TT genotypes.

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