Molecular mechanisms used by Salmonella to interfere with Dendritic Cell function

نویسندگان

  • S. M. Bueno
  • A. A. Herrada
  • A. M. Kalergis
چکیده

Las Células Dendríticas (DCs) son células presentadoras de antígeno profesionales, capaces de reconocer y degradar antígenos bacterianos que son presentados a linfocitos T vírgenes para así iniciar la respuesta inmune específica contra los antígenos derivados de patógenos. Por esta razón, algunos microorganismos patógenos han adquirido mecanismos de virulencia que interfieren con la función de la DC y evitan la activación de la respuesta inmune específica. Salmonella enterica serovar Typhimurium, el agente causal en el ratón de una enfermedad similar a fiebre tifoidea, es capaz de escapar de la presentación de antígenos mediada por la DC al evitar su degradación lisosomal. Esta capacidad virulenta de Salmonella requiere la expresión funcional de un Sistema de Secreción de Tipo III (TTSS) y de otras proteínas de virulencia codificadas por la Isla de Patogenicidad 2 (SPI-2). En esta revisión discutimos estudios recientes que han demostrado que el impedimento de la función de la DC, debido a la actividad de los productos génicos de la SPI-2 y a la evasión de la fusión fagosoma-lisosoma, es crucial para la patogénesis de Salmonella.

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تاریخ انتشار 2006