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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Aging and Inflammation.

Amit Singh1, Shepherd H Schurman2, Arsun Bektas3

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Aging leads to inflammaging, a chronic inflammation linked to disease and frailty. Reducing inflammation through lifestyle changes may extend health span, offering a promising strategy for healthy aging.

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Area of Science:

  • Immunology
  • Gerontology
  • Molecular Biology

Background:

  • Aging is characterized by a decline in resilience and increased damage accumulation.
  • The immune system plays a key role in aging, with chronic inflammation, termed 'inflammaging,' being a hallmark.
  • Inflammaging is associated with increased risk of age-related diseases, frailty, and mortality.

Purpose of the Study:

  • To review recent advances in understanding inflammaging mechanisms and immune dysregulation during aging.
  • To explore the role of key inflammatory pathways like NF-κB and their therapeutic targeting.
  • To examine the influence of the gut microbiome and stress response on inflammation and aging.

Main Methods:

  • Review of current literature on aging, inflammation, and immune function.
  • Focus on molecular mechanisms including NF-κB signaling and inflammatory mediators.
  • Analysis of the role of the gastrointestinal microbiome and integrated stress response.
  • Examination of clinical trial data on inflammation reduction interventions.

Main Results:

  • Aging is associated with persistent immune activation and chronic inflammation (inflammaging).
  • Key pathways like NF-κB contribute to chronic inflammation, and targeting these mediators shows promise.
  • Age-related changes in the gut microbiome (dysbiosis) and stress responses modulate inflammation.
  • Clinical trials suggest that reducing inflammation, potentially through lifestyle interventions, may improve health span.

Conclusions:

  • Inflammation serves as both a biomarker of failed resilience and a causal factor in age-related decline.
  • Non-pharmacological interventions like diet and exercise can reduce inflammation.
  • A life course approach emphasizing education on lifestyle factors may enhance health span with minimal risks.