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- W2040778840 abstract "During the Norwegian military ranger-training course, cadets are exposed to prolonged physical exercise combined with sleep-, energy-, and food deficiency. The open-window postexercise hypothesis indicates that after hard physical activity, there is an increased risk of contracting infectious diseases.The purpose of the present study was to determine leukocyte reactive oxygen species (ROS) levels, total antioxidant status (TAS), leukocyte expression of the cell adhesion molecules CD62L and CD11b, and plasma levels of soluble adhesion molecule L-selectin before, during, and in the recovery phase of a military ranger-training course.Ten cadets from the Norwegian Military Academy were recruited to the study. Flow cytometry was used to study the intracellular levels of ROS in leukocytes (basally, as well as after in vitro stimulation with phorbol myristate acetate (PMA)), applying the probes dihydroethidium (DHE) and dihydrorhodamine 123 (DHR) and the leukocyte expression of adhesion molecules CD62L and CD11b. ELISA was used to assess the plasma levels of soluble L-selectin, and TAS in plasma was measured using the ABTS+ reduction assay kit.The basal levels of ROS as well as PMA-stimulated ROS in leukocytes declined gradually during the ranger-training course, being lowest on the last day (P < 0.05). The level of TAS increased (P < 0.01) during the course. A striking decrease (P < 0.001) was observed in leukocyte CD62L expression and was sustained even after 3 d of recovery. The leukocyte expression of CD11b remained unchanged.The ranger-training course leads to a partial exhaustion of the leukocyte ROS-generating machinery and to a nearly total extinguishing of leukocyte CD62L expression. These changes may support the open-window hypothesis indicating reduced ability to combat microbial invasions before total restitution." @default.
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- W2040778840 date "2007-02-01" @default.
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- W2040778840 title "LeuCAM and Reactive Oxygen Species during Long-Term Exercise Combined with Sleep and Energy Deficiency" @default.
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- W2040778840 doi "https://doi.org/10.1249/01.mss.0000241648.07382.7c" @default.
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