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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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Inflammatory biomarkers, multi-morbidity, and biologic aging.

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Higher multi-morbidity percentiles correlate with increased levels of interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α), indicating a link between clinical aging and inflammation.

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Area of Science:

  • Gerontology
  • Immunology
  • Biomarkers

Background:

  • Multi-morbidity percentiles serve as a clinical measure of aging.
  • Inflammatory markers like IL-6, IL-10, and TNF-α are implicated in aging processes.

Purpose of the Study:

  • To investigate the association between multi-morbidity percentiles and key inflammatory markers.
  • To explore the relationship between clinical aging indicators and specific cytokines.

Main Methods:

  • Analysis of 1646 participants (50-95 years) from the Mayo Clinic Study of Aging.
  • Categorization of participants into quintiles based on age- and sex-specific multi-morbidity percentiles.
  • Measurement of plasma IL-6, IL-10, and TNF-α levels in 1595 participants.

Main Results:

  • Elevated IL-6 and TNF-α levels were observed in individuals with higher multi-morbidity percentiles.
  • Significant trends for IL-6 were found in women and participants aged 70+.
  • TNF-α showed significant trends in participants aged 70+.
  • No significant association was found between IL-10 and multi-morbidity percentiles.

Conclusions:

  • Multi-morbidity percentiles may represent a valuable index of biological aging.
  • The association is particularly pronounced in women and older adults (70+).
  • Further research is warranted to validate multi-morbidity percentiles as a biomarker of aging.