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Secreción de sustratos por los diferentes sistemas de secreción de EHEC durante su interacción con células

Landy Zambrano-Arguello1, Jaime Vazquez-Lopez1, Fernando Navarro-Garcia1

  • 1Department of Cell Biology, Centro de Investigación Y de Estudios Avanzados (Cinvestav), Mexico.

Virulence
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PubMed
Resumen
Este resumen es generado por máquina.

La Escherichia coli enterorragica (EHEC) utiliza múltiples sistemas de secreción (SS) que interactúan durante la infección. Las células epiteliales influyen en la EHEC

Palabras clave:
interacción EHEC-células epitelialesEscherichia coliefectores bacterianossecreción de proteínasproteómicasistemas de secreciónfactores de virulencia

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Área de la Ciencia:

  • Microbiología
  • Patogénesis
  • Sistemas de Secreción Bacteriana

Sus antecedentes:

  • La Escherichia coli enterorragica (EHEC) es una causa importante de enfermedades transmitidas por alimentos en humanos.
  • La EHEC posee cinco tipos de sistemas de secreción (SS), pero su papel colectivo en la interacción huésped-patógeno es poco conocido.
  • Si bien se conocen algunos sustratos para estos SS, su función coordinada durante la infección sigue sin explorarse en gran medida.

Objetivo del estudio:

  • Investigar la función colectiva de los sistemas de secreción de EHEC durante la interacción con células epiteliales.
  • Aclarar la jerarquía y la interdependencia de la secreción de proteínas a través de diferentes SS en EHEC.
  • Identificar nuevos sustratos secretados por los SS de EHEC y comprender su papel en la patogénesis.

Principales métodos:

  • Optimización de ensayos de secreción de proteínas para cuatro SS de EHEC in vitro y en presencia de células epiteliales.
  • Utilización de Western blot y proteómica para analizar los cambios en el secretoma de EHEC.
  • Realización de análisis bioinformáticos para predecir nuevos sustratos de SS.
  • Generación y análisis de mutantes deficientes en SS específicos.

Principales resultados:

  • Las células epiteliales aumentaron significativamente la secreción de proteínas por parte de la EHEC, influyendo en la abundancia de sustratos específicos.
  • Se observó un patrón de secreción jerárquico cuando la EHEC se encontró con células epiteliales.
  • Las mutaciones en un SS afectaron la secreción de proteínas de otros SS, lo que indica interdependencia.
  • Las células epiteliales modularon los efectos de las mutaciones en los SS y se identificaron nuevos sustratos potenciales.

Conclusiones:

  • Existe una compleja interacción entre los sistemas de secreción de EHEC durante la infección de células epiteliales.
  • Esta interacción de los SS influye en las interacciones huésped-patógeno y en la patogénesis de la EHEC.
  • La comprensión de estos SS es crucial para desarrollar estrategias contra las infecciones por EHEC.