Metabolite patterns associated with individual response to supervised exercise therapy in patients with intermittent...

Area of Science:

• Biochemistry
• Exercise Physiology
• Metabolomics

Background:

• Supervised exercise therapy (SET) is the primary treatment for intermittent claudication in peripheral arterial disease (PAD).
• Individual responses to SET vary significantly despite proven efficacy.
• Understanding metabolic factors influencing these individual responses is crucial for optimizing treatment.

Purpose of the Study:

• To utilize plasma metabolomics to identify metabolic predictors of individual response to SET in PAD patients.
• To investigate the association between specific metabolites and functional improvements after SET.

Main Methods:

• Plasma samples were collected before and after 12 weeks of SET, alongside treadmill tests.
• Metabolomic profiling included primary metabolites, complex lipids, and lipid mediators.
• Ensemble modeling was employed to correlate metabolite levels and changes with functional response variability.

Main Results:

• High baseline anandamide levels correlated with a worse response to SET.
• Increased arachidonic acid (AA) and decreased dihomo-γ-linolenic acid across SET were linked to poorer outcomes.
• Greater tolerance to AA increases during exercise predicted better walking times post-SET.

Conclusions:

• Anandamide synthesis may negatively impact treadmill performance via endocannabinoid receptor activation.
• SET may enhance tolerance to AA and inflammation, leading to improved walking capacity.
• These findings highlight key metabolic pathways influencing SET efficacy in PAD.