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Source of Chronic Inflammation in Aging.

Fumihiro Sanada1, Yoshiaki Taniyama1,2, Jun Muratsu1,2

  • 1Department of Clinical Gene Therapy, Graduate School of Medicine, Osaka University, Suita, Japan.

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Aging involves chronic inflammation, or "inflammaging," a key risk factor for elderly health issues. This persistent inflammation can arise from cell senescence and immune system dysregulation, even without infection.

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IGFBP-5agingcell senescencehyper coagulationinflammation

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Area of Science:

  • Gerontology
  • Immunology
  • Molecular Biology

Background:

  • Aging is characterized by a chronic, low-grade inflammatory state known as "inflammaging."
  • Inflammaging is a significant risk factor for morbidity and mortality in older adults.
  • This inflammation persists independently of initial triggers like LDL cholesterol or the renin-angiotensin system (RAS).

Purpose of the Study:

  • To summarize the known factors and cellular pathways regulating persistent low-grade inflammation in aging.
  • To explore novel sources of chronic inflammation contributing to aging and age-related diseases.

Main Methods:

  • Literature review and synthesis of current research on inflammaging.
  • Analysis of cellular senescence and innate immunity dysregulation as drivers of persistent inflammation.
  • Investigation of the role of coagulation factors in inflammatory signaling.

Main Results:

  • Cellular senescence and innate immune dysregulation are identified as mechanisms for sustained inflammation post-stimulus.
  • Coagulation factors are implicated as a novel source of chronic inflammation and cellular senescence.
  • Multiple factors and pathways contribute to the persistent pro-inflammatory status in aging.

Conclusions:

  • Understanding the multifaceted origins of inflammaging is crucial for addressing age-related diseases.
  • Targeting cellular senescence, immune dysregulation, and coagulation pathways may offer therapeutic strategies.
  • Further research into novel inflammatory mediators is warranted to combat age-related decline.