title: Polymorphisms in tumor necrosis factor and lymphotoxin A in tuberculosis without and with response to treatment.
abstract: This study compared the frequency of the genetic polymorphisms of tumor necrosis factor (TNF) in pulmonary tuberculosis without and with response to treatment. We carried out an observational, prospective, comparative study. Three groups were studied: healthy subjects, responders, and non-responders to directly observed treatment short-course. We took a peripheral blood sample for identification of polymorphic genotypes TNF -308G/A and lymphotoxin A (LTA) +252G/A by polymerase chain reaction, and their later digestion with the Nco1 restriction enzyme. We studied a total of 138 subjects: 42 (non-responders) and 48 in each of the remaining groups. Healthy subjects had significantly high frequency of the LTA +252A allele compared to groups of patients and could be related with protection from the disease. Patients had higher frequency of the non-polymorphic allele LTA +252G than healthy subjects. With regard to LTA +252G/A genotype, we did find a significant difference with a greater frequency in the group of patients. The LTA +252G/A genotype was associated with impaired response to treatment.
authors.affiliation: Unidad de Investigación Médica en Inmunología e Infectología, Hospital de Infectología, Centro Médico Nacional La Raza (CMNR), Instituto Mexicano del Seguro Social (IMSS), Av. Jacarandas y Seris, Col. La Raza, Mexico City, Mexico. gelorriaga@webtelmex.net.mx
authors.forename: Guadalupe
authors.initials: G
authors.lastname: García-Elorriaga
authors.forename: Guadalupe
authors.initials: G
authors.lastname: Carrillo-Montes
authors.forename: Melby
authors.initials: M
authors.lastname: Mendoza-Aguilar
authors.forename: César
authors.initials: C
authors.lastname: González-Bonilla
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D000995:Antitubercular Agents / Q000627:therapeutic use; D024881:Drug Resistance, Bacterial; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008233:Lymphotoxin-alpha / Q000235:genetics*; D008297:Male; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic / Q000235:genetics; D011446:Prospective Studies; D016896:Treatment Outcome; D014397:Tuberculosis, Pulmonary / Q000188:drug therapy / Q000453:epidemiology / Q000235:genetics*; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics*; D055815:Young Adult
chemical_list: D000995:Antitubercular Agents; D008233:Lymphotoxin-alpha; D014409:Tumor Necrosis Factor-alpha