2010, Número 5
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salud publica mex 2010; 52 (5)
Receptores tipo Toll, patogénesis y respuesta inmune a Helicobacter pylori
Sánchez-Zauco NA, Giono-Cerezo S, Maldonado-Bernal C
Idioma: Español
Referencias bibliográficas: 47
Paginas: 447-454
Archivo PDF: 187.25 Kb.
RESUMEN
Helicobacter pylori coloniza el epitelio gástrico y la mayoría de las personas infectadas es asintomática, de 10 al 20% desarrolla gastritis atrófica, úlcera péptica, y menos de 3% genera cáncer gástrico. Estas patologías están determinadas por la relación entre los factores de virulencia de la bacteria y los factores del hospedero como predisposición genética y respuesta inmune. La inmunidad innata, representada principalmente por los receptores tipo Toll y tipo Nod, reconocen a sus ligandos específicos y activan factores de transcripción como NF-κB, AP-1, CREB-1, induciendo la producción de citocinas inflamatorias como IL-8, IL-12, IL-6, IL-1β, IL-18 y TNF-α, e IL-10. La inflamación crónica favorece los cambios de morfología gástrica, evita la apoptosis y favorece la angiogénesis, ocasionando lesiones neoplásicas y cáncer. El objetivo de esta revisión es analizar los mecanismos propuestos a la fecha de la respuesta inmune innata y adaptativa, involucrados en la infección por
H. pylori, y se puntualiza en los mecanismos de eliminación o persistencia de la infección.
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