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

Eur J Appl Physiol Occup Physiol. 1995;71(2-3):245-52. doi: 10.1007/BF00854986.

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 three beta 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 three beta 2-integrins on granulocytes and lymphocytes throughout the experimental period. These results suggest that the cell-surface expression of CD62L (and CD11a) molecules is associated with the differential mobilization of CD8+ cells during exercise, the postexercise suppression of CD4+ cell-counts and the granulocytosis following exercise.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Cell Adhesion Molecules / metabolism*
  • Cell Membrane / metabolism
  • Granulocytes / metabolism*
  • Humans
  • Integrin alphaXbeta2 / metabolism
  • L-Selectin / metabolism
  • Leukocytes / cytology
  • Lymphocyte Count
  • Lymphocyte Function-Associated Antigen-1 / metabolism
  • Lymphocyte Subsets / cytology
  • Lymphocytes / metabolism*
  • Macrophage-1 Antigen / metabolism
  • Male
  • Physical Exertion*

Substances

  • Cell Adhesion Molecules
  • Integrin alphaXbeta2
  • Lymphocyte Function-Associated Antigen-1
  • Macrophage-1 Antigen
  • L-Selectin