Original Article

European Journal of Applied Physiology and Occupational Physiology

, Volume 71, Issue 2, pp 245-252

First online:

Exercise-induced changes in the expression of surface adhesion molecules on circulating granulocytes and lymphocytes subpopulations

  • Y. KurokawaAffiliated withDepartments of Hygiene and Public Health, Ehime University School of Medicine
  • , S. ShinkaiAffiliated withDepartments of Hygiene and Public Health, Ehime University School of Medicine
  • , J. ToriiAffiliated withDepartment of Medical Laboratory Technology, Ehime College of Health Science
  • , S. HinoAffiliated withDepartment of Nutritiopn, Yamaguchi Women's College
  • , P. N. ShekAffiliated withOperation Medicine Division, Defence and Civil Institute of Environmental MedicineDepartment of Clinical Biochemistry, Faculty of Medicine, University of Toronto

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Abstract

This study examined the relationship between exercise-induced changes in the concentration of circulating immunocompetent cells and their surface expression of adhesion molecules: L-selectin (CD62L) and threeβ 2-integrins [LFA-1(CD11a/CD18), Mac-1 (CD11b/CD18), and p150/95(CD11c/CD18)]. Eight young male volunteers exercised on a cycle ergometer for 60 min at 60% maximal oxygen uptake. Peripheral blood samples, collected every 30 min throughout exercise and during the 2-h recovery period, were used for flow-cytometric analysis. The experimental results were compared with control data obtained ever 60 min at corresponding times of the nonexercise day. The exercise regimen induced a granulocytosis and a lymphocytosis, mainly due to an elevation of CD8+ and CD16+ cells. During recovery, a further granulocytosis occurred but accompanied by a lymphopenia. The increased CD8+ cell-count during exercise was characterized by a selective mobilization of the CD62L and CD11ahigh cells, i.e.primed CD8+ cells. A postexercise suppression of CD4+ cell-count was derived only from CD62L+ cells. The CD11b+ and CD11c+ lymphocytes also increased during exercise, largely attributable to an increase in CD16+ cells which co-expressed CD11b and CD11c molecules. The CD62L surface density of granulocytes increased significantly during recovery. This resulted from a selective influx of CD62Lhigh granulocytes into the circulation. There were no significant changes in per-cell density of the threeβ 2-integrins on granulocytes and lymphocytes throughout the experimental period. These results suggest that the cell-surface expression of CD62L (and CD I la) molecules is associated with the differential mobilization of CD8+ cells during exercise, the postexercise suppression of CD4 cell-counts and the granulocytosis following exercise.

Key words

Physical exercise Leukocyte Adhesion molecule L-selectin β 2-integrin