Abstract
Hyperoxia is routinely used to prevent or treat hypoxemia and acute respiratory failure, and sustain aerobic life in military and commercial operations. However, breathing oxygen acutely at high pressures and for long durations is toxic. The present study aimed to investigate effects of hyperbaric oxygen (HBO) exposure on plasma metabolite profiles. We applied a liquid chromatography-mass spectrometry based metabolomic approach to analyze metabolites from plasma of both rats and humans under HBO conditions to explore the possible effects of HBO on the body. Uric acid (UA) and arachidonic acid concentrations were changed significantly in both rat and human plasma, and some precursor metabolites of UA in the UA pathway were also changed. For acute and chronic HBO exposures on plasma UA after exogenous UA injection, the results indicated exogenous administration of UA significantly increased plasma UA and ascorbic acid levels. However, these returned to normal levels 48 h after HBO exposure. These findings suggest HBO exposure can combat the harmful effects of increased UA from exposure to elevated partial pressure of oxygen. Furthermore, exogenous administration of UA not only does not disturb its metabolism, but also increases its anti-oxidative capacity (increase ascorbic acid). These findings suggest that the use of antioxidants might be necessary under HBO exposure, especially under extreme HBO exposure.
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Abbreviations
- ANOVA:
-
Analyses of variance
- AA:
-
Arachidonic acid
- ATA:
-
Atmosphere absolute
- CNS:
-
Central nervous system
- EPA:
-
Eicosapentaenoic acid
- ESI:
-
Electrospray ionization
- FA:
-
Fatty acid
- HBO:
-
Hyperbaric oxygen
- LC-MS:
-
Liquid chromatography-mass spectrometry
- NADPH:
-
Nicotinamide adenine dinucleotide phosphate
- OPLS:
-
Orthogonal partial least squares
- PC:
-
Principle component
- PLS-DA:
-
Partial least squares-discriminate analysis
- Q-TOF-MS:
-
Quadrupole time-of-flight mass spectrometry
- ROS:
-
Reactive oxygen species
- RT:
-
Retention time
- TIC:
-
Total ion chromatography
- UPLC-MS:
-
Ultra-performance liquid chromatography-mass spectrometry
- UA:
-
Uric acid
- XDH:
-
Xanthine dehydrogenase
- XOR:
-
Xanthine oxidoreductase
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Acknowledgement
This work was supported by the Military Eleventh Five-Year Plan Medicine Research Foundation (No. 08G066).
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Xinru Liu and Wenwu Liu contributed equally to the work.
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Liu, X., Liu, W., Sun, X. et al. Effects of hyperbaric oxygen on uric acid and arachidonic acid: a metabolomic study in rats and humans. Metabolomics 6, 375–385 (2010). https://doi.org/10.1007/s11306-010-0210-2
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DOI: https://doi.org/10.1007/s11306-010-0210-2