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The struggle for iron: gastrointestinal microbes modulate the host immune response during infection

Troy A Markel1, Paul R Crisostomo, Meijing Wang

  • 1Department of Surgery, Indiana University School of Medicine, Emerson Hall 215, Indianapolis, IN 46202, USA.

Journal of Leukocyte Biology
|January 27, 2007
PubMed

Insights

This review explores how bacteria use iron to survive and evade immune responses in the gastrointestinal tract. It discusses iron

Area of Science:

  • Immunology
  • Microbiology
  • Gastroenterology

Background:

  • The gastrointestinal tract is a primary route for bacterial invasion.
  • Local mucosal immunity is crucial for host defense and tolerance.
  • Macrophages require iron for producing antimicrobial reactive oxygen species.

Purpose of the Study:

  • To review the immune response to gastrointestinal infections.
  • To examine iron absorption mechanisms in the gut.
  • To highlight iron' s role in bacterial pathogenesis and potential therapeutic strategies.

Main Methods:

  • Literature review of immune responses to gastrointestinal pathogens.
  • Analysis of host mechanisms for intraluminal iron absorption.
  • Discussion of bacterial iron sequestration strategies.

Main Results:

  • Bacteria compete with macrophages for iron, a vital nutrient for both.
  • Altering iron availability presents a potential non-traditional antimicrobial therapy.
  • Necrotizing enterocolitis is a condition where iron-targeted therapies may be beneficial.

Conclusions:

  • Understanding the interplay between host immunity, iron metabolism, and bacterial virulence is key.
  • Targeting bacterial iron acquisition offers a novel therapeutic avenue.
  • Further research into iron-modulated therapies for gastrointestinal infections is warranted.

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