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[Immunosenescence and the lung].

J Duchateau1

  • 1Laboratoire d'Immunologie, CHU Brugmann, Bruxelles, Belgique. jean.duchateau@chu-brugmann.be

Revue Des Maladies Respiratoires
|November 25, 2003
PubMed
Summary

As people age, their immune system weakens, increasing the risk of respiratory infections and reducing vaccine effectiveness. Addressing immune deficiencies in older adults can improve health outcomes and vaccination benefits.

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Area of Science:

  • Gerontology
  • Immunology
  • Respiratory Medicine

Context:

  • Ageing leads to structural and functional respiratory changes, often linked to immune system decline.
  • Increased susceptibility to respiratory infections like pneumococci and influenza is a major risk in the elderly.
  • Immunosenescence, intrinsic or secondary to other factors, degrades adaptive immune responses, particularly to influenza and polysaccharide antigens.

Purpose:

  • To review the role of the immune system in the respiratory tract of ageing individuals.
  • To highlight age-related changes in lung function and immune cell populations.
  • To discuss the impact of immunosenescence on respiratory health and vaccination efficacy.

Summary:

  • Respiratory system changes with age include reduced muco-ciliary clearance, loss of elastic fibers, and chronic low-grade inflammation.
  • Alterations in innate and adaptive immunity, including decreased antibody production and increased activated T lymphocytes, are observed.
  • Functional zinc deficiency is implicated in humoral immunity defects, with long-term zinc and selenium replacement potentially reducing infection frequency and severity.

Impact:

  • Detecting and treating age-associated immune deficiencies is crucial for improving elderly health.
  • Interventions targeting immune function can enhance the efficacy and clinical benefits of vaccinations in older adults.
  • Understanding these changes is vital for developing targeted strategies to combat respiratory diseases in the ageing population.

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