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Mast cells in innate immunity.

Y A Mekori1, D D Metcalfe

  • 1Department of Medicine, Meir General Hospital, Kfar-Saba, Israel. ymekori@netvision.net.il

Immunological Reviews
|March 17, 2000
PubMed
Summary

Mast cells play a role in innate immunity against bacterial infections, as demonstrated in animal models. Their involvement in human innate immune responses to bacteria requires further investigation.

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Area of Science:

  • Immunology
  • Cell Biology
  • Microbiology

Background:

  • Mast cells are key players in IgE-mediated allergic reactions.
  • Their tissue location and functional capabilities suggest a role in innate immunity.
  • Mast cells interact with microorganisms, leading to activation and mediator release.

Purpose of the Study:

  • To investigate the role of mast cells in innate immune responses to bacterial infections.
  • To explore the mechanisms of mast cell activation and mediator release in response to microorganisms.
  • To determine the in vivo relevance of mast cell-microorganism interactions.

Main Methods:

  • Utilized in vitro and in vivo models of bacterial infection.
  • Employed complement-deficient, mast cell-deficient, and mast cell-reconstituted mice.
  • Assessed the impact of mast cell modulation on host response to bacterial infection.

Main Results:

  • Mast cell activation and mediator release were observed upon interaction with certain microorganisms.
  • In vivo studies confirmed the crucial role of mast cells in host defense against bacterial infection in animal models.
  • C3 and tumor necrosis factor-alpha-dependent leukocyte recruitment were vital for bacterial clearance.

Conclusions:

  • Mast cells contribute to innate immunity in animal models of bacterial infection.
  • The findings highlight mast cells as important mediators in the host's early defense against pathogens.
  • Further research is needed to ascertain the role of mast cells in human innate immunity against bacteria.

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