Cord blood-derived human cultured mast cells produce transforming growth factor beta1

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Analyzing the Functions of Mast Cells In Vivo Using 'Mast Cell Knock-in' Mice
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Published on: May 27, 2015

N Kanbe1, M Kurosawa, H Nagata

  • 1Department of Dermatology, Gunma University School of Medicine, Maebashi, Japan.

Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology
|March 3, 1999
PubMed
Abstract

Insights

Human mast cells, derived from cord blood, constitutively produce functional transforming growth factor beta1 (TGF-beta1). This finding suggests a new role for mast cells in the development of tissue fibrosis.

Area of Science:

  • Immunology
  • Cell Biology
  • Fibrosis Research

Background:

  • Mast cells are found at fibrotic sites, with suspected roles in pathogenesis.
  • The synthesis of transforming growth factor beta1 (TGF-beta1) by human mast cells remains unconfirmed.

Purpose of the Study:

  • To investigate if human mast cells from cord blood express mRNA for TGF-beta.
  • To determine if these mast cells produce bioactive TGF-beta1.

Main Methods:

  • Culturing mononuclear cells from cord blood to obtain mast cells.
  • Utilizing reverse transcriptase-polymerase chain reaction (RT-PCR) for mRNA expression analysis.
  • Performing immunocytochemical staining and bioassays to detect TGF-beta1 production.

Main Results:

  • Cultured human mast cells constitutively express TGF-beta1 mRNA.
  • Immunocytochemistry confirmed the presence of both latent and active TGF-beta forms.
  • Mast cell conditioned medium demonstrated significant TGF-beta1 bioactivity.

Conclusions:

  • Human mast cells derived from cord blood constitutively express and produce functional TGF-beta1.
  • Given TGF-beta1's fibrogenic properties, these findings indicate a novel role for mast cells in tissue fibrosis.

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