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Airway hyperreactivity, an introduction.

R Pauwels1, J Kips, G Joos

  • 1Department of Respiratory Diseases, University Hospital, Ghent, Belgium.

Agents and Actions. Supplements
|January 1, 1990
PubMed
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Asthma involves airway inflammation and hyperresponsiveness. Animal models show controlling mechanisms that normally inhibit this, and their absence may lead to asthma development.

Area of Science:

  • Pulmonary Medicine
  • Immunology
  • Neuroscience

Background:

  • Asthma is defined by airway inflammation and hyperresponsiveness to various stimuli.
  • This hyperresponsiveness is linked to complex interactions between inflammatory cells, neurons, and smooth muscle cells.
  • Several mechanisms, including increased mucosal permeability and mediator modulation, influence airway inflammation's effect on responsiveness.

Purpose of the Study:

  • To investigate the interaction between airway inflammation and airway responsiveness.
  • To explore the role of controlling mechanisms in mitigating inflammation-induced hyperresponsiveness.

Main Methods:

  • Utilized two distinct animal models: acute endotoxin exposure and chronic aerosolized antigen exposure.
  • Examined the interplay between inflammatory processes and airway responsiveness in these models.

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Main Results:

  • Both animal models illustrated the intricate relationship between inflammation and airway responsiveness.
  • Demonstrated the presence of positive feedback mechanisms that actively inhibit increased airway responsiveness caused by inflammation.

Conclusions:

  • The complexity of inflammation-airway responsiveness interactions was highlighted.
  • A deficiency in these inhibitory controlling mechanisms may contribute to the development of asthmatic hyperresponsiveness.