Blood Metabolite Profiling of Antarctic Expedition Members: An ¹H NMR Spectroscopy-Based Study

Area of Science:

• Environmental and Exercise Physiology
• Metabolomics
• Biochemistry

Background:

• Antarctic expeditions involve prolonged exposure to hypobaric hypoxia.
• Understanding physiological adaptation to extreme environments is crucial for crew health.
• Metabolomics offers a powerful tool to investigate biochemical changes during adaptation.

Purpose of the Study:

• To investigate serum metabolic profiles during Antarctic winter-over.
• To identify biochemical markers of adaptation to hypobaric hypoxia.
• To elucidate metabolic pathway perturbations associated with physiological acclimatization.

Main Methods:

• Serum samples collected from participants at Concordia base during an Antarctic expedition.
• Nuclear Magnetic Resonance (NMR) spectroscopy for metabolic profiling.
• Multivariate statistical analyses including Principal Component Analysis (PCA) and Partial Least Squares Discriminant Analysis (PLS-DA) for data interpretation.

Main Results:

• Significant changes in serum metabolite levels were observed, indicating an adaptation period.
• Increased levels of glutamine and lipids suggest mobilization for energy demands.
• Reduced levels of glutamate and N-acetyl glycoproteins indicate decreased stress and inflammation.

Conclusions:

• The study highlights a distinct metabolic adaptation to hypobaric hypoxia in Antarctic expedition participants.
• Mobilization of glutamine and lipids, alongside reduced stress markers, are key features of this adaptation.
• Metabolic pathway analysis provides insights into the physiological adjustments to extreme environments.