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A Model of Self-limited Acute Lung Injury by Unilateral Intra-bronchial Acid Instillation

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Published on: August 30, 2019

Airway injury during high-level exercise.

Pascale Kippelen¹, Sandra D Anderson

¹Centre for Sports Medicine & Human Performance, Brunel University, Uxbridge, UK. pascale.kippelen@brunel.ac.uk

British Journal of Sports Medicine

|January 17, 2012

Summary

High-level exercise, especially in extreme conditions, may injure airway epithelial cells. This damage and repair cycle could explain bronchial hyper-responsiveness in elite athletes.

Area of Science:

Respiratory physiology
Cellular biology
Exercise science

Background:

Airway epithelial cells form a critical barrier against environmental insults.
This barrier modulates inflammation and immune responses.
Maintaining airway epithelial integrity is vital for respiratory health.

Purpose of the Study:

To explore the impact of exercise on airway epithelial integrity.
To identify mechanisms contributing to exercise-induced airway injury.
To investigate the link between airway injury and bronchial hyper-responsiveness in athletes.

Main Methods:

Review of accumulating evidence on exercise and airway epithelium.
Analysis of factors like dehydration and hyperpnoea during intense exercise.

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Examination of the injury-repair process in airway epithelial cells.

Main Results:

Evidence suggests exercise, particularly high-level and in extreme environments, can injure airway epithelium.
Dehydration and mechanical forces during hyperpnoea are implicated in injury.
The airway epithelium's injury-repair cycle may underlie bronchial hyper-responsiveness.

Conclusions:

Exercise can compromise airway epithelial barrier function.
Mechanisms involve dehydration and mechanical stress during intense breathing.
This process is a potential contributor to exercise-induced bronchial hyper-responsiveness in athletes.