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Updated: Feb 13, 2026

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Effect of Different Levels of Salt Consumption on Urine Protein Composition during 105-Day Isolation Analyzed with
Abstract:
We investigated changes in the urine protein composition of healthy volunteers in controlled conditions during 105-day isolation (Mars-500 program) at different levels of salt consumption. We used newest proteomic techniques based on chromatography-mass spectrometry and various methods of bioinformatics including opoSOM. The period of observation can be divided into three intervals with different dynamics of protein excretion: early (week 1-6), intermediate (week 7-11) and late interval (week 12-15). We identified about 10 different groups of co-detected proteins, which are directly affected by periods with different-levels of salt consumption. We also determined the biological functions of these proteins, tissue specificity and signaling pathways that involve them.
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