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Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
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The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
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Updated: Feb 22, 2026

Invasion of Human Cells by a Bacterial Pathogen
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Gasdermin frente a patógenos bacterianos intracelulares

Fernando W Souza1,2, Yaxin Liu1, Jacqueline Trujillo3

  • 1Department of Integrative Immunobiology, Duke University School of Medicine, Durham, NC, USA.

Nature microbiology
|February 20, 2026
PubMed
Resumen
Este resumen es generado por máquina.

La piroptosis, un proceso de muerte celular que implica poros de gasdermisina (GSDM), es una defensa clave contra las bacterias intracelulares. Mientras que los patógenos adaptados al huésped evaden la piroptosis, las bacterias ambientales no pueden, lo que resalta su papel en la inmunidad a la infección.

Palabras clave:
GasderminPiroptosisBacterias intracelularesEvasión de patógenosInmunidad

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Área de la Ciencia:

  • Inmunología
  • Microbiología
  • Biología Celular

Sus antecedentes:

  • Los patógenos bacterianos intracelulares causan enfermedades humanas significativas.
  • La piroptosis, una muerte celular lítica, está mediada por poros de gasdermisina (GSDM) y elimina patógenos.
  • Las proteínas GSDM se activan por diversas vías de señalización.

Objetivo del estudio:

  • Revisar los avances recientes en la comprensión de la activación de las proteínas GSDM y la piroptosis.
  • Explorar cómo la piroptosis elimina las bacterias intracelulares y prepara las respuestas inmunitarias.
  • Contrastar las estrategias de evasión de patógenos contra la piroptosis.

Principales métodos:

  • Revisión de la literatura científica reciente sobre piroptosis y proteínas GSDM.
  • Análisis de distintas vías de señalización que activan las proteínas GSDM.
  • Estudio comparativo de patógenos bacterianos adaptados al huésped frente a ambientales.

Principales resultados:

  • Cinco proteínas GSDM (GSDMA-E) se activan por distintas vías.
  • La piroptosis elimina los nichos bacterianos intracelulares y libera citoquinas.
  • Los patógenos adaptados al huésped como Shigella, Salmonella y Mycobacterium tuberculosis subvierten la piroptosis.
  • Las bacterias ambientales como Burkholderia y Chromobacterium no logran evadir la piroptosis.

Conclusiones:

  • La piroptosis es un potente mecanismo de defensa del huésped contra las bacterias intracelulares.
  • Las estrategias de los patógenos para subvertir la piroptosis son cruciales para la infección.
  • La comprensión de la piroptosis proporciona información sobre las interacciones huésped-patógeno y los posibles objetivos terapéuticos.