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Related Experiment Videos

Breaking Down Walls: Microbiota and the Aging Gut.

Erin S Keebaugh1, William W Ja1

  • 1Department of Neuroscience, The Scripps Research Institute, Jupiter, FL 33458, USA; Center on Aging, The Scripps Research Institute, Jupiter, FL 33458, USA.

Cell Host & Microbe
|April 14, 2017
PubMed
Summary

Aging is linked to increased inflammation across many animal species. This study shows that aging-related inflammation stems from disrupted interactions between gut microbes and the host.

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Area of Science:

  • Microbiology
  • Immunology
  • Gerontology

Background:

  • Aging is characterized by a systemic increase in inflammation, a phenomenon observed across diverse animal species.
  • The precise mechanisms driving age-related inflammation remain incompletely understood.
  • Homeostatic balance between the host and its resident microbial communities is crucial for health.

Purpose of the Study:

  • To investigate the relationship between aging, intestinal microbes, and inflammation.
  • To identify the molecular and cellular basis for age-associated inflammatory changes.
  • To understand how host-microbe interactions influence the aging process.

Main Methods:

  • Comparative analysis of microbial communities in young and aged animal models.
  • Assessment of inflammatory markers and immune cell populations.

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  • Investigation of host-microbial metabolite interactions.

    • Main Results:

    • A significant correlation was observed between advanced age and heightened systemic inflammation.
    • Deregulation of homeostatic interactions between intestinal microbes and the aging host was identified as a key factor.
    • Specific microbial dysbiosis patterns were associated with increased inflammatory signaling.

    Conclusions:

    • The aging process is associated with a breakdown in the symbiotic relationship between the host and its gut microbiota.
    • Restoring microbial homeostasis may represent a therapeutic target for mitigating age-related inflammation.
    • Understanding these host-microbe dynamics is critical for addressing age-related diseases.