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Oxygen radical generation of neutrophils: a reason for oxidative stress during marathon running?

Item Type:Article
Title:Oxygen radical generation of neutrophils: a reason for oxidative stress during marathon running?
Creators Name:Hessel, E. and Haberland, A. and Mueller, M. and Lerche, D. and Schimke, I.
Abstract:Hematological parameters and blood markers that indicate oxidative stress, such as lipid peroxides (LPO), reduced and oxidized glutathione (GSH, GSSG), superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), were measured in 18 marathon runners before, immediately after the race, and after 8 days of rest. In parallel, the oxygen radical generation of neutrophils (PMN) was measured by chemiluminescence in six randomly selected runners. After the race, a 4.4-fold enhanced PMN count and a 1.4-fold increased capacity to generate oxygen radicals of the PMN (2.20±0.38 vs. 3.12±0.69 arb. unit/10 6 cells) were found. Consequently, a 6.25-fold increased capacity to generate oxygen radicals of the post-run blood (7.26±1.3 vs. 45.40±10.3 arb. unit/ml blood) was calculated. This points to PMN as an important oxygen radical source established in the runners' blood, which could contribute to the oxidative stress indicated in the post-run blood by increased LPO (11.46±3.09 vs. 13.09±3.14 μmol/l plasma), GSSG (0.038±0.003 vs. 0.045±0.005 mmol/l blood) and GSSG/GSH ratio (3.8±0.5 vs. 4.1±0.6%) and by decreased SOD (15.63±1.78 vs. 14.58±1.51 10 3U/mmol Hb) and GSH-Px (485.1±107.1 vs. 434.9±101.7 U/mmol Hb). Despite the decline of the oxygen radical source during rest, the oxidative stress in the blood did not decrease in all runners.
Keywords:Chemiluminescence, Glutathione Peroxidase, Lipid Peroxide, Marathon Running, Neutrophils, Superoxide Dismutase
Source:Clinica Chimica Acta
ISSN:0009-8981
Publisher:Elsevier (The Netherlands)
Volume:298
Number:1-2
Page Range:145-156
Date:1 August 2000
Official Publication:https://doi.org/10.1016/S0920-1211(00)00120-0
PubMed:View item in PubMed

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