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[Inter-relationship between allergenic pollens and air pollution]

G Peltre1

  • 1CNRS-Institut Pasteur-28, Paris.

Allergie Et Immunologie
|February 11, 1999
PubMed
Summary

Pollen allergies are rising in France, exacerbated by urban pollution. Pollutants weaken pollen grains, increasing allergic reactions like rhinitis, conjunctivitis, and asthma in susceptible individuals.

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Area of Science:

  • Environmental Science
  • Immunology
  • Botany

Context:

  • Increasing pollen allergy morbidity in the French population.
  • Pollen acts as a vector for plant male gametes, with wind-borne pollens being highly allergenic.
  • Atopic individuals are susceptible to developing allergic rhinitis, conjunctivitis, or asthma due to pollen exposure.

Purpose:

  • To investigate the role of urban pollution in exacerbating pollen allergy.
  • To understand the mechanisms by which pollutants increase pollen sensitization and allergic responses.

Summary:

  • Over 200 allergens are known, with well-defined three-dimensional structures.
  • Urban pollution, varying by zone (residential, commercial, industrial), significantly impacts pollen allergy morbidity.
  • Pollen accumulates on urban surfaces, and exposure to pollutants for 24-48 hours increases sensitization.

Impact:

  • Pollutants appear to compromise the exine structure of pollen, enhancing mucosal reactions and allergen exposure.
  • Pollutants act as adjuvants, promoting increased production of Immunoglobulin E (IgE) and intensifying allergic reactions.

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