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Related Experiment Videos

T-lymphocyte dysregulation in asthma

J N Kline1, G W Hunninghake

  • 1Division of Pulmonary, Critical Care, and Occupational Medicine, University of Iowa College of Medicine, Iowa City 52242.

Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.)
|December 1, 1994
PubMed
Summary

T-cell dysregulation plays a key role in asthma development. Activated T cells in airways and shifts in T helper cell subsets, particularly Th2 cells, are linked to asthma pathogenesis and inflammation.

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Area of Science:

  • Immunology
  • Respiratory Medicine

Background:

  • Asthma is a chronic inflammatory airway disease.
  • T-cell dysregulation is increasingly recognized in asthma pathogenesis.

Purpose of the Study:

  • To review evidence linking T-cell dysregulation to asthma.
  • To discuss the role of T helper cell subsets in asthma.

Main Methods:

  • Review of existing literature on T-cell function in asthma.
  • Analysis of T-cell activation markers in asthmatic airways.
  • Examination of T helper cell subset (Th1/Th2) involvement.

Main Results:

  • Asthmatic airways show activated T cells, correlating with inflammation.
  • Alterations in T helper/suppressor cell ratios occur during allergen exposure and attacks.

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  • Steroid therapy can normalize some T-cell ratio changes.
  • Th2 cytokines (IL-4, IL-5) are implicated, with potential Th1 involvement.

    • Conclusions:

    • T-cell dysregulation is central to asthma pathogenesis.
    • Th1 and Th2 cells and their cytokines are relevant to human allergic disease, including asthma.