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08:36
Quantifying Yersinia pseudotuberculosis Type III Secretion System Activity Following Iron Starvation and Anaerobic Growth
Published on: May 31, 2024
Iron in innate immunity: starve the invaders
1David Geffen School of Medicine at UCLA, Los Angeles, CA 90095-1690, United States. tganz@mednet.ucla.edu
Current Opinion in Immunology
|February 24, 2009
Summary
Iron is vital for life, but the immune system restricts its availability to microbes. Specialized proteins manage iron during infections, impacting microbial growth and host defense.
Area of Science:
- Immunology
- Microbiology
- Biochemistry
Background:
- Iron is an essential nutrient for all living organisms, including microbes.
- Innate immunity employs iron restriction as a defense mechanism against microbial pathogens.
- Microbes have developed strategies to overcome host-induced iron limitation.
Purpose of the Study:
- To investigate the role of iron in microbial infections.
- To elucidate the immune mechanisms involved in iron withholding from microbes.
- To understand how inflammation-regulated proteins modulate iron availability during infection.
Main Methods:
- Review of epidemiologic studies on iron and infection.
- Analysis of laboratory studies on immune responses to microbial iron restriction.
- Examination of inflammation-regulated proteins involved in iron metabolism.
Main Results:
- Epidemiologic data suggest iron potentiates microbial infections.
- Immune systems constitutively and inducibly withhold iron from microbes.
- Inflammation-regulated proteins chelate iron, trap siderophores, and alter iron transport.
Conclusions:
- Host iron sequestration is a critical innate immune strategy.
- Microbial iron acquisition mechanisms are key virulence factors.
- Targeting iron metabolism presents a potential therapeutic avenue for infections.
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