Exercise-induced apoptosis of lymphocytes depends on training status

Medicine and Science in Sports and Exercise
F C MoorenK Völker

Abstract

To investigate the effect of training status on lymphocyte apoptosis as well as the expression of cell death receptors and ligands after a marathon run, and to compare these data with the alterations after treadmill exercise tests. Sixteen volunteers successfully finished the 2002 Münster marathon. Venous blood samples were drawn before and 0, 3, and 24 h after the race. After cell isolation, cell-based apoptosis markers annexin V, Fas receptor, and Fas ligand were measured by flow cytometry. The same parameters were investigated in a group of 10 subjects before, and 0 and 1 h after both an exhaustive (ExT) and a low-intensity (LoT) treadmill test. The percentage of apoptotic cells after the marathon changed in a biphasic manner. An early increase 3 h after the run was followed by a significant decrease 1 d later. Interestingly, the increase in apoptotic cells was not observed in highly trained athletes, whereas it was significantly more pronounced in badly trained athletes. ExT induced a lymphocyte apoptosis similar to the marathon, whereas no change in apoptosis was observed after the LoT. Both Fas receptor and ligand were increased after the marathon with different kinetics. Whereas the Fas receptor peaked at 1 h, Fas ligand...Continue Reading

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Citations

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Apoptosis

Apoptosis is a specific process that leads to programmed cell death through the activation of an evolutionary conserved intracellular pathway leading to pathognomic cellular changes distinct from cellular necrosis