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Related Experiment Videos

Mast cell ontogeny and apoptosis

D D Metcalfe1, J A Mekori, M Rottem

  • 1Laboratory of Clinical Investigation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.

Experimental Dermatology
|August 1, 1995
PubMed
Summary

Tissue mast cell numbers are regulated by precursor production from bone marrow and survival in tissues. Stem cell factor (SCF) and interleukin-3 (IL-3) are key regulators, with SCF crucial for mast cell survival.

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Mast cell numbers in tissues are determined by precursor production and mature cell survival.
  • Mast cell development from bone marrow precursors is influenced by interleukin-3 (IL-3) and stem cell factor (SCF).

Purpose of the Study:

  • To elucidate the regulatory mechanisms governing tissue mast cell numbers.
  • To understand the roles of specific cytokines and cellular interactions in mast cell homeostasis.

Main Methods:

  • The study reviews the known factors influencing mast cell production and survival.
  • It examines the effects of cytokines like IL-3, SCF, IL-4, IL-10, and TGF-beta on mast cells.
  • Considers the role of cell surface receptors and extracellular matrix interactions.

Main Results:

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  • Mast cell precursors are initially responsive to IL-3 and later to SCF.
  • SCF is critical for mast cell survival in tissues and can rescue cells from IL-3 withdrawal-induced apoptosis.
  • Transforming growth factor-beta (TGF-beta) can inhibit SCF-mediated rescue, and integrin engagement may also impact mast cell numbers.

Conclusions:

  • Tissue mast cell numbers are dynamically regulated by both central production rates and peripheral survival.
  • SCF plays a pivotal role in maintaining mast cell populations in tissues.
  • Modulating mast cell production or survival offers potential avenues for therapeutic intervention.