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Related Experiment Videos

Effect of bradykinin on airway function.

P J Barnes1

  • 1Department of Thoracic Medicine, National Heart and Lung Institute, Dovehouse St, London, UK.

Agents and Actions. Supplements
|January 1, 1992
PubMed
Summary

Bradykinin (BK) significantly impacts airway function, potentially worsening obstructive airways disease through bronchoconstriction and neurogenic inflammation. Understanding these B2-receptor mediated effects is crucial for developing new treatments.

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Area of Science:

  • Pulmonary Medicine
  • Respiratory Physiology
  • Pharmacology

Background:

  • Bradykinin (BK) plays a role in airway function.
  • Its effects are mediated through B2-receptors.
  • BK's involvement in obstructive airways disease is under investigation.

Purpose of the Study:

  • To elucidate the multifaceted effects of bradykinin on airway physiology.
  • To explore the relevance of bradykinin in the context of obstructive airways disease.

Main Methods:

  • In vivo studies in animals and humans.
  • Assessment of airway smooth muscle contraction.
  • Evaluation of microvascular leakage and mucus secretion.
  • Investigation of sensory nerve activation and neuropeptide release.

Main Results:

  • Bradykinin acts as a potent in vivo bronchoconstrictor.
  • It induces airway smooth muscle contraction and bronchial vasodilation.
  • BK increases microvascular leakage and stimulates mucus secretion.
  • Activation of airway sensory nerves by BK leads to reflex bronchoconstriction, coughing, and neurogenic inflammation.

Conclusions:

  • Bradykinin exerts significant and diverse effects on airway function.
  • These actions, particularly sensory nerve activation, are critical in obstructive airways disease.
  • Targeting bradykinin pathways may offer therapeutic strategies for respiratory conditions.

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