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Early development of mast cells.

M Rottem1, A S Kirshenbaum, D D Metcalfe

  • 1Mast Cell Physiology Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md.

International Archives of Allergy and Applied Immunology
|January 1, 1991
PubMed
Summary

Mast cells develop from bone marrow progenitor cells, requiring specific growth factors like IL-3 for proliferation. Their final characteristics are influenced by the local tissue environment.

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Area of Science:

  • Immunology
  • Cell Biology
  • Hematology

Background:

  • Mast cells are crucial immune cells originating from bone marrow progenitor cells.
  • Their development and proliferation are regulated by specific cytokines and cell interactions.

Purpose of the Study:

  • To elucidate the origins and developmental requirements of mast cells.
  • To understand factors influencing mast cell proliferation, phenotype, and survival.

Main Methods:

  • Tracing the origin of mast cells from pluripotential bone marrow cells.
  • Investigating the role of cytokines such as Interleukin-3 (IL-3), Interleukin-4 (IL-4), and Granulocyte-Macrophage Colony-Stimulating Factor (GM-CSF) in mast cell proliferation.
  • Identifying early mast cell populations via IgE receptors.
  • Assessing mast cell survival in co-culture with fibroblasts.

Main Results:

  • Human mast cells originate from CD34-positive progenitor cells.
  • Mast cell proliferation is dependent on IL-3; IL-4 promotes growth in mice, while GM-CSF inhibits proliferation.
  • Early mast cells express IgE receptors but may lack mature morphology.
  • Fibroblast-derived factors support mast cell persistence in culture.

Conclusions:

  • Mast cell development is a complex process influenced by hematopoietic origins and specific growth factors.
  • The tissue microenvironment plays a critical role in determining the final mast cell phenotype.

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