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Protective roles of free avian respiratory macrophages in captive birds

Mbuvi P Mutua1, Shadrack Muya2, Muita M Gicheru3

  • 1Department of Zoological Sciences, Kenyatta University, P.O. Box 43844-00100, Nairobi, Kenya. patmbuvi@gmail.com.

Biological Research
|June 17, 2016
PubMed

Insights

Free avian respiratory macrophages (FARM) are crucial for bird lung defense, despite earlier assumptions of their scarcity. Recent findings highlight their potent phagocytic capabilities and potential therapeutic targets for avian respiratory diseases.

Area of Science:

  • Avian immunology
  • Pulmonary defense mechanisms
  • Innate and adaptive immunity

Background:

  • Mammalian lungs rely on respiratory macrophages for pathogen defense.
  • Avian lungs have free avian respiratory macrophages (FARM), previously thought to be scarce, potentially weakening pulmonary defense.
  • Avian respiratory systems possess multiple defense mechanisms, including filtration, epithelial barriers, and mucociliary clearance.

Purpose of the Study:

  • To review the role of FARM in avian pulmonary defense.
  • To investigate the phagocytic capacity of FARM.
  • To explore the effects of peroxisome proliferator activated receptor gamma (PPAR γ) agonists on FARM.

Main Methods:

  • Literature review on avian respiratory immunology.
  • Analysis of studies on FARM phagocytic activity.
  • Examination of research on PPAR γ agonists in avian models.

Main Results:

  • FARM demonstrate efficient phagocytic capacity and pathogen elimination.
  • Selective synthetic PPAR γ agonists impact non-phlogistic phagocytic properties in FARM.
  • Avian pulmonary defense relies on a combination of FARM and physical/mechanical barriers.

Conclusions:

  • FARM play a significant role in avian innate immunity.
  • Understanding FARM function is key to developing treatments for poultry respiratory diseases.
  • Further research is needed to fully elucidate FARM's role in both innate and adaptive immune responses.
Keywords:
Avian lungFARMPPAR γ ligandsPhagocytosis

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