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War and peace at mucosal surfaces.

Philippe J Sansonetti1

  • 1Unité de Pathogénie Microbienne Moléculaire, U389 INSERM and Howard Hughes Medical Institute, Institut Pasteur, 28 Rue du Docteur Roux, 75724 Paris cedex 15, France. psanson@pasteur.fr

Nature Reviews. Immunology
|December 2, 2004
PubMed
Summary

The immune system maintains a delicate balance, tolerating beneficial gut bacteria while preparing to fight harmful pathogens. This review explores the gut

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Area of Science:

  • Immunology
  • Microbiology
  • Gastroenterology

Background:

  • The human gut hosts numerous bacteria, requiring immune system tolerance.
  • Immune system possesses sensing and effector systems to detect microbial intrusion.
  • A balance exists between immune homeostasis with commensal flora and response to pathogens.

Purpose of the Study:

  • To review mechanisms of immune dialogue in the gut.
  • To understand the balance between immune unresponsiveness and active defense.

Main Methods:

  • Literature review of immune system interactions with gut microbiota.
  • Analysis of mechanisms governing immune tolerance and activation.

Main Results:

  • The immune system navigates a fine line between tolerating commensal gut flora and responding to pathogens.
  • Mechanisms exist to control the 'dialogue' between immune unresponsiveness and defense initiation.

Conclusions:

  • Maintaining gut homeostasis relies on precise immune regulation.
  • Understanding this immune dialogue is crucial for gut health and disease prevention.

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