2008, Número 3
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Gac Med Mex 2008; 144 (3)
Asociación de la tuberculosis pulmonar con los antígenos del sistema HLA en el Noreste de México
Rojas-Alvarado MÁ, Díaz-Mendoza ML, Said-Fernández S, Caballero-Olíne G, Cerda-Floresa RM
Idioma: Español
Referencias bibliográficas: 35
Paginas: 233-238
Archivo PDF: 53.09 Kb.
RESUMEN
Antecedentes: La susceptibilidad genética a tuberculosis pulmonar (TbP) ha sido asociada al sistema HLA (antígenos de los leucocitos humanos) del MHC (complejo mayor de histocompatibilidad), principalmente con los antígenos HLA-DR y -DQ. Dado lo anterior, el objetivo de este estudio caso-control no pareado, fue determinar la asociación de TbP con los antígenos HLA-DR y -DQ en pacientes que asistían a una unidad médica del IMSS.
Métodos: Los fenotipos del sistema HLA de casos (n=50) y controles (n=417), se definieron serológicamente por la técnica de microlinfocitotoxicidad dependiente de complemento. Los linfocitos B fueron obtenidos utilizando inmunoperlas. Las frecuencias alélicas y haplotípicas, equilibrio de Hardy-Weinberg y el desequilibrio de ligamiento, se determinaron mediante el programa computacional Arlequín versión 3.01, y el riesgo relativo (RR) mediante el programa
Epimax Table Calculator.
Resultados: Los alelos HLA-DR11(5), -DR16(2) y -DQ7(3) y los haplotipos /DR11(5)-DQ7(3), /DR14(6)-DQ5(1) y /DR16(2)-DQ7(3) fueron más frecuentes en casos que en controles (RR›1, p‹0.05). Los alelos HLA-DR17(3) y DQ8(3) y los haplotipos /DR17(3)-DQ2 y /DR4-DQ8(3) fueron más frecuentes en controles que en casos (RR‹1, p‹0.05).
Conclusiones: Estos resultados sugieren asociación entre TbP y HLA-DR y -DQ en esta población mestiza mexicana y son similares a los encontrados en otros estudios caso-control no pareados a nivel mundial.
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