Acute psychological stress and exercise and changes in peripheral leukocyte adhesion molecule expression and density

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M U Goebel1, P J Mills

  • 1Department of Psychiatry, University of California, San Diego, La Jolla, USA. marion.goebel@uni-essen.de

Psychosomatic Medicine
|October 6, 2000
PubMed

Insights

Both psychological stress and exhaustive exercise alter immune cell adhesion molecules. These changes in L-selectin, LFA-1, and ICAM-1 on leukocytes may impact inflammation and disease.

Area of Science:

  • Immunology
  • Exercise Physiology
  • Stress Physiology

Background:

  • Adhesion molecules on leukocytes are critical for immune cell trafficking and inflammatory responses.
  • Understanding how acute stressors affect these molecules is vital for comprehending immune system regulation.

Purpose of the Study:

  • To investigate the impact of acute psychological stress and exhaustive exercise on the expression and density of key adhesion molecules (L-selectin, LFA-1, ICAM-1) on monocytes, granulocytes, and lymphocytes.

Main Methods:

  • Forty-five healthy volunteers underwent a 15-minute public speaking task (psychological stress) and a 15-18 minute bicycle ergometer challenge (exhaustive exercise).
  • Flow cytometry was used to analyze the expression and density of adhesion molecules on different leukocyte subsets.

Main Results:

  • Both stressors increased circulating leukocytes and lymphocyte subsets.
  • Exercise decreased L-selectin density on lymphocytes, while both stressors increased LFA-1 density on lymphocytes.
  • ICAM-1 expression increased on circulating leukocytes, though density remained unchanged.

Conclusions:

  • Acute psychological stress and exhaustive exercise significantly alter adhesion molecule expression on circulating leukocytes.
  • These findings highlight the role of sympathetic nervous system activation in immune modulation and may have implications for inflammatory diseases.
Abstract

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