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Aging01:26

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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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A complex systems approach to aging biology.

Alan A Cohen1,2,3, Luigi Ferrucci4, Tamàs Fülöp5,6

  • 1PRIMUS Research Group, Department of Family Medicine, University of Sherbrooke, Sherbrooke, Quebec, Canada. alan.cohen@usherbrooke.ca.

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Aging research is shifting to a complex systems approach, integrating molecular and cellular data to understand aging dynamics. This framework emphasizes interaction networks and resilience to explain aging as a disruption of integrated regulatory mechanisms.

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Area of Science:

  • Gerontology
  • Complex Systems Biology
  • Network Theory

Background:

  • Aging biology research has advanced at molecular, cellular, and genetic levels.
  • A shift towards integrating these components is crucial for understanding aging dynamics.
  • This transition necessitates a complex systems framework, supported by big data and analytical tools.

Purpose of the Study:

  • To provide a theoretical framework for aging research transitioning to a complex systems approach.
  • To orient researchers on key concepts like emergence, interaction networks, and resilience.
  • To propose how integrated regulatory mechanisms across hierarchical scales contribute to organismal function and aging.

Main Methods:

  • Drawing on evolutionary theory, network theory, and homeostasis principles.
  • Developing a theoretical framework to conceptualize aging within a complex systems context.
  • Presenting examples across biological scales, from sub-organismal to clinical geriatrics.

Main Results:

  • Organismal function is proposed to arise from integrated regulatory mechanisms across multiple scales.
  • Disruption of these integrated mechanisms is hypothesized to cause aging phenotypes and functional decline.
  • The complex systems approach offers a unified perspective on aging across different biological levels.

Conclusions:

  • A complex systems framework is essential for advancing aging biology.
  • Understanding aging requires integrating knowledge from molecules to clinical observations.
  • This approach enhances our comprehension of aging by focusing on system-level dynamics and resilience.