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Plasma acylcarnitine levels increase with healthy aging.

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Plasma acylcarnitines change with age and gender in healthy individuals. Long-chain variants increase, while odd-chain variants decrease, revealing insights into aging and metabolism.

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Area of Science:

  • Metabolomics
  • Aging Research
  • Biochemistry

Background:

  • Acylcarnitines are crucial for fatty acid transport into mitochondria, supporting beta-oxidation and energy metabolism.
  • Elevated plasma acylcarnitines are linked to decreased mitochondrial activity, inflammation, and age-related diseases.
  • The specific changes in acylcarnitines during healthy aging are not well understood.

Purpose of the Study:

  • To investigate the associations between plasma acylcarnitine levels and age in healthy individuals.
  • To identify gender-specific differences in age-related acylcarnitine changes.
  • To explore the relationship between age-associated acylcarnitines and other metabolic features.

Main Methods:

  • Analysis of plasma acylcarnitines in 163 healthy participants aged 20-90.
  • Statistical examination of acylcarnitine levels in relation to chronological age.
  • Metabolome-wide association study (MWAS) to correlate acylcarnitines with other metabolites.
  • Assessment for gender-specific variations in acylcarnitine profiles.

Main Results:

  • Long-chain and very long-chain acylcarnitines showed a significant increase with age.
  • Several odd-chain acylcarnitines demonstrated a decrease in concentration as age advanced.
  • Distinct gender-specific age associations were observed for certain acylcarnitines, such as eicosadienoylcarnitine in males and hydroxystearoylcarnitine in females.
  • MWAS revealed minimal overlap in age-associated metabolic features between genders.

Conclusions:

  • Plasma acylcarnitine profiles exhibit significant variations with age and gender, even in individuals considered healthy.
  • These findings suggest potential gender-specific metabolic adaptations or responses during the aging process.
  • Further research is warranted to clarify whether these acylcarnitine changes represent early signs of disease, adaptive responses, or mitochondrial reprogramming.