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Related Experiment Videos

Immune response in asymptomatic smokers.

A Zeidel1, B Beilin, I Yardeni

  • 1Department of Anesthesiology, Rambin Medical Center, Petah Tiqva, Sackler School of Medicine, Tel Aviv University, Israel.

Acta Anaesthesiologica Scandinavica
|August 23, 2002
PubMed
Summary

Smoking impairs natural killer (NK) cell activity and unbalances cytokine production in blood immune cells. These systemic immune changes in smokers may increase infection risk, particularly post-surgery.

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Area of Science:

  • Immunology
  • Cellular Biology
  • Public Health

Background:

  • Cigarette smoking is known to affect immune function, potentially increasing infection risk.
  • Previous studies noted impaired alveolar mononuclear cell function in smokers.
  • Systemic effects on blood immune cells suggest broader immune compromise beyond respiratory tissues.

Purpose of the Study:

  • To investigate the systemic impact of tobacco smoking on blood-derived immune cells.
  • To assess effects on natural killer (NK) cell activity, cytokine production, and cell proliferation.
  • To exclude individuals with chronic obstructive pulmonary disease (COPD) to isolate smoking's direct effects.

Main Methods:

  • Isolated peripheral blood mononuclear cells (PBMC) from 24 smokers and 28 controls.

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  • Stimulated PBMC with lipopolysaccharide (LPS) or phytohemagglutinin (PHA) to measure cytokine secretion (IL-1beta, IL-1ra, IL-6, IL-10, TNFalpha, IL-2).
  • Assessed NK cell cytotoxicity and PBMC proliferative response to mitogens (PHA, ConA).

    • Main Results:

    • Smokers exhibited increased production of pro-inflammatory cytokines (IL-1beta, IL-6, TNFalpha) and enhanced cell proliferation.
    • Secretion of IL-2 and anti-inflammatory cytokines (IL-1ra, IL-10) remained similar between groups.
    • Natural killer (NK) cell cytotoxic activity was significantly suppressed in smokers.

    Conclusions:

    • Smokers without COPD show suppressed NK cell activity and imbalanced systemic cytokine production.
    • These immune alterations may predispose smokers to respiratory and systemic infections, especially postoperatively.
    • Findings highlight the need for anesthesiologists to consider these immune changes during perioperative management.