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The immediate protective response to microbial challenge.

José M González-Navajas1, Mary P Corr, Eyal Raz

  • 1Networked Biomedical Research Center for Hepatic and Digestive Diseases (CIBERehd), Hospital General de Alicante, Alicante, Spain; Division of Rheumatology, Allergy and Immunology, Department of Medicine, University of California San Diego, La Jolla, CA, USA.

European Journal of Immunology
|June 27, 2014
PubMed
Summary
This summary is machine-generated.

The innate immune system uses rapid, immediate protective responses, not just slower Toll-like receptor pathways, to fight infections early on. These early defenses are vital for preventing severe and recurrent infectious diseases.

Keywords:
Antimicrobial responseInfectionInnate immunity

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Area of Science:

  • Immunology
  • Microbiology
  • Infectious Diseases

Background:

  • The innate immune system relies on pattern-recognition receptors (PRRs), like Toll-like receptors, to detect pathogens and injury.
  • PRR-mediated responses involve complex signaling, transcription, and translation, which are too slow for immediate infection control.
  • A critical gap exists in understanding host defenses during the initial minutes of infection.

Purpose of the Study:

  • To investigate the host's defense mechanisms active within minutes of infection.
  • To define and characterize the "immediate protective response" as a distinct arm of innate immunity.
  • To highlight the physiological importance of these rapid responses in preventing microbial invasion.

Main Methods:

  • Review and analysis of existing literature on early host defense mechanisms.
  • Examination of antimicrobial peptides and extracellular traps as key components of the immediate response.
  • Correlation of deficiencies in immediate protective responses with clinical outcomes in infectious diseases.

Main Results:

  • The immediate protective response, including antimicrobial peptides and extracellular traps, acts within minutes of infection.
  • These rapid mechanisms are distinct from and precede slower PRR-mediated signaling pathways.
  • Defects in the immediate protective response are linked to severe and recurrent human infections.

Conclusions:

  • The immediate protective response is a crucial, evolutionarily conserved defense system.
  • Understanding this rapid response is essential for combating infectious diseases.
  • Targeting or bolstering immediate protective mechanisms may offer new therapeutic strategies.