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The intestinal microbiome and its relevance for functionality in older persons.

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Area of Science:

  • Gerontology
  • Microbiology
  • Neuroscience

Background:

  • Age-related changes in gut microbiota composition can negatively affect muscle synthesis and function.
  • The 'gut-muscle axis' and 'gut-brain axis' are hypothesized to link gut health to physical and cognitive aging.
  • Observational studies link frailty and Alzheimer's disease to gut dysbiosis in older individuals.

Purpose of the Study:

  • To review current research on the gut microbiota's role in sarcopenia, frailty, and cognitive decline in aging.
  • To explore the gut microbiota's relevance for healthy active aging and potential therapeutic interventions.

Main Methods:

  • Review of existing scientific literature on gut microbiota and aging.
  • Analysis of observational studies investigating the gut-muscle and gut-brain axes.
  • Synthesis of findings related to microbiota composition, inflammation, and age-related diseases.

Main Results:

  • Age-related gut dysbiosis is observed in older individuals, characterized by reduced biodiversity and increased pathobionts.
  • Mechanisms linking gut microbiota to cognition involve neurotransmission, neuroinflammation, and amyloid deposition.
  • Longevity in good health may correlate with a gut microbiota profile similar to younger adults.

Conclusions:

  • Gut microbiome composition is a potential determinant of functional performance in older adults.
  • The gut microbiome represents a promising target for anti-aging therapeutic strategies.
  • The independent role of gut microbiota in modulating frailty and cognition requires further investigation, considering factors like diet and exercise.