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[Oxidation Stress Markers Dynamics in the Experiment of Long-Term Antiorthostatic Hypokinesia (Retrospective Study)].
Fiziologiia Cheloveka 2016 January
In blood serum of 9 volunteers aged 27 to 42, participated in the experiment with 370-day antiorthostatic hypokinesia (-5 degrees), the lipid peroxidation derivates concentration--diene conjugates (DC), malonic dialdehyde (MDA), Schiff bases (SB) as well as antioxidant defense system indices--tocopherol (TP) concentration and total antioxidative activity level (AOA) were measured. The volunteers were divided into two groups subjected to physical training regimes and used prophylactic measures. In both groups the lipoperoxidation processes initial stages depression (by 54-73%) was observed starting from 50th day, thus the lipid peroxidation final product--SB level was decreased (by 50-61%) only to the 230 day and remains approximately at the same level till the end of the experiment. The restorative period was characterized by decreasing (in 1.6-2.3 times) of MDA and SB concentrations. The decrease in lotal AOA during the aftereffect period was detected in all volunteers, and its level was significantly lower physiological norm range. Probably, long-term adaptation to the simulated weightlessness conditions is accompanied by expressed decrease in biological oxidation processes intensity and significant stress effect, as indicates by essential depression of lipid free radical oxidation in the course of the experiment. At the same time the restorative period after 370-day antiorthostatic hypokinesia was characterized by significantly expressed and prolonged readaptation stress progress. It is evidenced by practically twofold decrease in lipoperoxidation processes intensity against significant increase in TP concentration and water-soluble antioxidants functional reserves exhaustion. Lipid peroxidation activation absence in all terms of examination reflects appropriate compensation of studying impact by volunteers.
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