title: Cytokine gene polymorphisms in Colombian patients with different clinical presentations of tuberculosis.
abstract: Tuberculosis (TB) has different clinical presentations. Pulmonary TB affects only the lungs and exhibits variable anti-mycobacterial immune responses. Pleural TB is a localized disease with a strong immune response. Miliary TB is a disseminated form with poor immune response. Cytokines play a pivotal role in anti-mycobacterial response and may determine the type of TB. Thus, gene polymorphisms associated with cytokine production may be associated with clinical presentations of TB. In this study, 54 tuberculin-negative healthy controls, 81 tuberculin-positive healthy controls, 140 patients with pulmonary TB, 30 with pleural TB and 20 with miliary TB were studied. Single nucleotide polymorphisms were typed for tumour necrosis factor-alpha, interferon-gamma (IFN-gamma), transforming growth factor-beta1, interleukin-10 (IL-10) and interleukin-6 by sequence-specific primer polymerase chain reaction (SSP-PCR). Allelic, genotypic and haplotypic associations with clinical forms of TB were evaluated. IL-10 -1082 A/A genotype and IFNgamma+874 T allele were associated with pleural TB. Seventy-five extended genotypes were found; two differed between patients and controls, and two between groups of patients. Results suggest that IL-10 low-producer polymorphism and IFN-gamma high-producer polymorphism are associated with pleural TB.
authors.affiliation: Grupo de Inmunología Celular e Inmunogenética, Sede de Investigación Universitaria, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
authors.forename: Marcela I
authors.initials: MI
authors.lastname: Henao
authors.forename: Carlos
authors.initials: C
authors.lastname: Montes
authors.forename: Sara C
authors.initials: SC
authors.lastname: París
authors.forename: Luis F
authors.initials: LF
authors.lastname: García
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D003105:Colombia; D016207:Cytokines / Q000235:genetics*; D005260:Female; D006801:Humans; D007371:Interferon-gamma / Q000235:genetics; D016753:Interleukin-10 / Q000235:genetics; D015850:Interleukin-6 / Q000235:genetics; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic / Q000235:genetics*; D016212:Transforming Growth Factor beta / Q000235:genetics; D014391:Tuberculosis, Miliary / Q000235:genetics*; D014396:Tuberculosis, Pleural / Q000235:genetics*; D014397:Tuberculosis, Pulmonary / Q000235:genetics*; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics
chemical_list: D016207:Cytokines; D015850:Interleukin-6; D016212:Transforming Growth Factor beta; D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10; D007371:Interferon-gamma