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Updated: Oct 29, 2025

Isolation of Peritoneum-derived Mast Cells and Their Functional Characterization with Ca2+-imaging and Degranulation Assays
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Epidermal Mast Cells in the Cat.

Danny W Scott1

  • 1Department of Clinical Sciences, New York State College of Veterinary Medicine, Cornell University, Ithaca, New York, U.S.A.

Veterinary Dermatology
|July 8, 2021
PubMed
Summary

Mast cells were identified in the skin of 11.6% of cats with non-neoplastic skin disorders, particularly in eosinophilic plaque and granuloma. These findings suggest a link between epidermal mast cells, immune-mediated conditions, and tissue eosinophilia in feline dermatoses.

Keywords:
CatEosinophiliaEpidermisImmune-mediatedMast cells

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Area of Science:

  • Veterinary Dermatology
  • Immunohistochemistry
  • Feline Pathology

Background:

  • Mast cells are immune cells implicated in allergic and inflammatory skin conditions.
  • Their presence in feline skin, particularly in non-neoplastic disorders, requires further investigation.
  • Understanding mast cell distribution can provide insights into disease pathogenesis.

Purpose of the Study:

  • To investigate the prevalence and distribution of mast cells in the epidermis and outer root sheath of cats with non-neoplastic skin diseases.
  • To correlate the presence of epidermal mast cells with specific dermatoses and their presumed underlying mechanisms.

Main Methods:

  • Histopathological examination of skin biopsies from 338 cats with non-neoplastic skin disorders.
  • Identification and quantification of mast cells in the epidermis and outer root sheath.
  • Correlation of mast cell presence with clinical diagnoses and histopathological findings, including eosinophilia.

Main Results:

  • Mast cells were detected in 11.6% of the cats studied (37 out of 338).
  • Epidermal mast cells were most frequently observed in cases of eosinophilic plaque and eosinophilic granuloma.
  • The majority of dermatoses with epidermal mast cells showed evidence of presumed immune-mediated pathogenesis and tissue eosinophilia.

Conclusions:

  • Epidermal mast cells are present in a subset of feline non-neoplastic skin disorders.
  • Their association with eosinophilic conditions and presumed immune-mediated pathogenesis highlights their potential role in these diseases.
  • Further research into the specific functions of mast cells in feline dermatoses is warranted.