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Air pollution: the pathobiologic issues.

R P Sherwin1

  • 1Department of Pathology, University of Southern California, Los Angeles 90033.

Journal of Toxicology. Clinical Toxicology
|January 1, 1991
PubMed
Summary
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Ambient ozone exposure causes significant lung disease in young adults, even at subclinical levels. This suggests air pollution accelerates lung structural decline and increases disease susceptibility.

Area of Science:

  • Environmental Health
  • Pulmonary Medicine
  • Pathology

Background:

  • Research often focuses on direct cause-effect of ozone on lungs.
  • Lung disease is typically multifactorial, with few response mechanisms.
  • Adult lungs commonly exhibit pre-existing disease.

Purpose of the Study:

  • To investigate the role of ambient air pollution, specifically ozone, in the pathogenesis of lung disease.
  • To assess the prevalence and severity of Centriacinar Region disease in young adults exposed to urban air pollution.
  • To explore the link between air pollution, structural lung decline, and overall lung health.

Main Methods:

  • Examined lung tissue from 107 young adults (14-25 years) in Los Angeles County.
  • Assessed the degree of Centriacinar Region disease, a marker of lung injury.

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  • Correlated findings with existing epidemiological and experimental data on air pollution effects.

    • Main Results:

    • 80% of youths exhibited some degree of Centriacinar Region disease.
    • 27% had severe and extensive Centriacinar Region disease.
    • Ozone exposure at 0.15 ppm, common in Los Angeles, induced mild Centriacinar Region disease in primates.

    Conclusions:

    • Ambient air pollution, including ozone, adversely affects the human lung, even in young individuals.
    • Centriacinar Region disease prevalence suggests accelerated structural lung decline due to pollution.
    • Urgent need for lung health monitoring using structural and functional assessments, potentially via image analysis and multi-city autopsy studies.