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The programmed aging paradigm: how we get old.

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Aging results from genetically controlled mechanisms, challenging the old view of accumulated damage. This new paradigm suggests aging is advantageous for supra-individual natural selection, supported by evidence of gene regulation.

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Area of Science:

  • Gerontology
  • Evolutionary Biology
  • Genetics

Background:

  • Traditional aging theories attribute senescence to unrepaired cellular damage.
  • The 'old paradigm' posits that natural selection cannot fully counteract age-related decline.
  • A contrasting 'new paradigm' proposes aging is genetically programmed and potentially advantageous.

Purpose of the Study:

  • To synthesize the progressive alterations characterizing aging.
  • To demonstrate that these age-related changes are genetically defined and regulated.
  • To provide evidence supporting the 'new paradigm' of aging.

Main Methods:

  • Review and synthesis of existing evidence on aging processes.
  • Analysis of genetic control mechanisms underlying age-related changes.
  • Comparative analysis of 'old' and 'new' paradigms of aging.

Main Results:

  • Aging involves clearly defined, progressive alterations.
  • These alterations are demonstrably regulated by specific genes.
  • Evidence supports the genetic control and potential selective advantage of aging.

Conclusions:

  • The 'new paradigm' of aging, driven by genetic mechanisms, is supported by current evidence.
  • This perspective challenges the 'old paradigm' of aging as solely due to accumulated damage.
  • Understanding the genetic basis of aging is crucial for validating evolutionary theories of senescence.