Elucidating regulatory processes of intense physical activity by multi-omics analysis

Area of Science:

• Physiology
• Biochemistry
• Occupational Health

Background:

• Intense physical activity in demanding occupations (e.g., firefighting, military) requires significant physiological and biochemical regulation.
• Understanding these adaptations can improve performance and prevent occupational illnesses.

Approach:

• Multi-omics analysis (proteins, lipids, metabolites) of blood plasma, urine, and saliva from wildland firefighters.
• Samples collected before and after a 45-minute intense exercise regimen.
• Statistical and pathway analyses compared pre- and post-exercise omics profiles.

Key Points:

• Identified 3835 proteins, 730 lipids, and 182 metabolites across biofluids.
• Blood plasma showed tissue damage/repair signatures and enhanced carbon metabolism.
• Urine analysis revealed renin-angiotensin system regulation for fluid balance and nutrient reabsorption.
• Saliva showed decreased pro-inflammatory cytokines and increased antimicrobial peptides.

Conclusions:

• Simultaneous regulatory signatures in biofluids indicate homeostatic maintenance during intense exercise.
• Findings suggest a potential increase in susceptibility to respiratory infections.
• Workers in physically demanding jobs may benefit from caution regarding respiratory diseases.