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T Cell Types and Functions01:24

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Antiasthma Drugs: Leukotriene Modifiers01:19

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Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs01:25

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Analysis of Pulmonary Dendritic Cell Maturation and Migration during Allergic Airway Inflammation
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Analysis of Pulmonary Dendritic Cell Maturation and Migration during Allergic Airway Inflammation

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CD39+ regulatory T cells attenuate allergic airway inflammation.

P Li1, Y Gao1, J Cao1

  • 1Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China.

Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology
|March 3, 2015
PubMed
Summary
This summary is machine-generated.

Regulatory T cells (Tregs) expressing CD39 limit allergic airway inflammation by controlling extracellular ATP and adenosine. CD39(+) Tregs demonstrate superior suppressive function, highlighting CD39 as a potential therapeutic target for asthma.

Keywords:
ATPCD39adenosineallergic asthmaregulatory T cells

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Adenoviral Transduction of Naive CD4 T Cells to Study Treg Differentiation
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Area of Science:

  • Immunology
  • Allergy and Asthma Research
  • T Cell Biology

Background:

  • The precise suppressive mechanisms of regulatory T cells (Tregs) are not fully understood.
  • CD39 expression on Tregs is implicated in their immunoregulatory role through ATP hydrolysis and adenosine generation.
  • Previous research linked ATP to allergic airway inflammation, but the specific roles of CD39 and CD39(+) Tregs remain unclear.

Purpose of the Study:

  • To elucidate the function and underlying mechanisms of CD39 expression by Tregs in the context of allergic airway inflammation.
  • To investigate the impact of CD39 on Treg-mediated suppression in asthma models.

Main Methods:

  • Allergic asthma was induced in CD39 wild-type and deficient mice.
  • CD39 expression on Tregs was analyzed using Foxp3-GFP knock-in mice.
  • The effects of CD39 inhibition (ARL67156) and enzymatic activity modulation (apyrase) were assessed.
  • In vitro suppression assays were performed to evaluate Treg function.

Main Results:

  • CD39 inhibition exacerbated airway inflammation, increasing inflammatory cell infiltration and Th2/Th17 cytokine levels.
  • Mice lacking CD39 exhibited significantly greater airway inflammation compared to wild-type controls.
  • CD39(+) Tregs displayed enhanced suppressive capacity compared to CD39(-) Tregs, particularly in regulating T cell cytokine secretion.
  • Adenosine A2A receptor antagonism diminished the inhibitory effects of CD39(+) Tregs.

Conclusions:

  • CD39 on Tregs plays a crucial role in limiting allergic airway inflammation by modulating extracellular ATP and adenosine levels.
  • CD39 represents a promising novel therapeutic target for the management of asthma.