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Mast cell disorders: From infancy to maturity.

Amy Wilcock1, Rajia Bahri1, Silvia Bulfone-Paus1

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Mast cells, beyond allergies, are vital for host defense and implicated in various diseases. Their evolution and gene plasticity reveal complex roles in health and conditions like mastocytosis and asthma.

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Area of Science:

  • Immunology
  • Cell Biology
  • Genetics

Background:

  • Mast cells are traditionally associated with immediate hypersensitivity and anaphylaxis.
  • Recent research reveals broader roles in host defense, inflammation, and disease pathogenesis.

Purpose of the Study:

  • To review the evolutionary diversification of mast cells.
  • To explore their roles beyond immediate hypersensitivity, including host defense and disease.
  • To highlight recent findings on mast cell involvement in various pathologies.

Main Methods:

  • Literature review of evolutionary, genetic, and clinical studies on mast cells.
  • Analysis of gene duplication events (serine proteases, KIT, TPSAB1).
  • Synthesis of evidence linking mast cells to diseases like mastocytosis, asthma, cancer, and vascular disease.

Main Results:

  • Mast cell evolution involved serine protease gene duplication, enhancing defense against parasites and venoms.
  • Somatic mutations in KIT cause mastocytosis; TPSAB1 duplication leads to a multi-system disease.
  • Mast cells are implicated in severe asthma, vascular remodeling, and neonatal diseases linked to hypoxia.

Conclusions:

  • Mast cells possess diverse and complex roles in health and disease, extending far beyond their traditional allergic functions.
  • Genetic plasticity and mutations in mast cells contribute to significant human pathologies.
  • Further research into mast cell biology is crucial for understanding and treating a wide range of conditions.