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The avian heterophil.

Kenneth J Genovese1, Haiqi He, Christina L Swaggerty

  • 1U.S. Department of Agriculture, Agricultural Research Service, Food and Feed Safety Research Unit, College Station, TX 77845, USA. genovese@ffsru.usda.gov

Developmental and Comparative Immunology
|April 16, 2013
PubMed
Summary
This summary is machine-generated.

Avian heterophils are crucial for host defense, utilizing pathogen recognition receptors and antimicrobial mechanisms like oxidative bursts and extracellular traps to combat microbes. This review details their functions, signaling, and the impact of genetic selection.

Keywords:
AvianGranulocyteHeterophilInnate immunityPoultry

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Area of Science:

  • Avian immunology
  • Innate immunity
  • Cellular microbiology

Background:

  • Heterophils are key immune cells in birds, essential for defending against pathogens.
  • They employ sophisticated mechanisms to detect and eliminate microbes.
  • Recent research has elucidated their roles in innate immune responses.

Purpose of the Study:

  • To review recent advances in understanding avian heterophils.
  • To detail their functions, including pathogen recognition and microbial killing.
  • To explore signaling pathways, antimicrobial products, and the effects of genetic selection.

Main Methods:

  • This study is a comprehensive literature review.
  • It synthesizes current knowledge on avian heterophil biology.
  • Focuses on receptors, signaling, antimicrobial mechanisms, and genetic influences.

Main Results:

  • Avian heterophils detect pathogens via toll-like receptors (TLR) and other receptors.
  • Upon detection, they activate signaling pathways and release cytokines/chemokines.
  • Microbial killing involves oxidative bursts, degranulation, and heterophil extracellular traps (HETs).

Conclusions:

  • Avian heterophils possess diverse and effective mechanisms for pathogen defense.
  • Understanding their signaling and functions is vital for avian health.
  • Genetic selection can influence heterophil function, impacting host immunity.