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Related Experiment Videos

Ozone affects breathing and pulmonary surfactant function in mice

W D Currie1, S M van Schaik, I Vargas

  • 1The Department of Radiology, Duke University Medical Center, Durham, NC, USA.

Toxicology
|May 19, 1998
PubMed
Summary

Ozone exposure significantly impairs breathing in mice by damaging pulmonary surfactant function. This dysfunction, linked to increased protein in lung fluid, alters breathing patterns and reduces tidal volume.

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Area of Science:

  • Environmental toxicology
  • Pulmonary physiology
  • Respiratory medicine

Background:

  • Ozone is a major air pollutant with known respiratory effects.
  • Pulmonary surfactant is critical for maintaining airway patency and normal lung function.

Purpose of the Study:

  • To investigate the impact of acute ozone exposure on respiratory parameters in mice.
  • To evaluate the effect of ozone on the functional integrity of pulmonary surfactant.

Main Methods:

  • Whole-body plethysmography was used to measure respiratory rate and tidal volume in BALB/c mice.
  • Capillary surfactometry assessed the ability of bronchoalveolar lavage (BAL) fluid to maintain airway patency.
  • Protein concentration in BAL fluid was measured to correlate with surfactant dysfunction.

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Main Results:

  • Ozone exposure significantly decreased respiratory rate and tidal volume in mice.
  • Pulmonary surfactant function, assessed by airway patency maintenance, was severely impaired by ozone exposure (P < 0.0001).
  • Protein concentration in BAL fluid increased significantly with prolonged ozone exposure, correlating with surfactant dysfunction (P < 0.0001).

Conclusions:

  • Ozone exposure causes significant alterations in breathing patterns in mice.
  • Surfactant dysfunction, likely due to plasma protein leakage into the airways, is a key mechanism underlying ozone-induced respiratory changes.