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Related Experiment Videos

Evolution, stress, and longevity.

T L Kirkwood1, P Kapahi, D P Shanley

  • 1Biological Gerontology Group, University of Manchester, UK. gerontology@ncl.ac.uk

Journal of Anatomy
|February 24, 2001
PubMed
Summary
This summary is machine-generated.

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Longer-lived species invest more in somatic maintenance and stress resistance, supporting the disposable soma theory. Calorie restriction may be an evolutionary adaptation for life history plasticity, enhancing stress responses.

Area of Science:

  • Evolutionary biology
  • Gerontology
  • Cell biology

Background:

  • The disposable soma theory posits that longevity is a trade-off between somatic maintenance and reproduction.
  • Species with lower extrinsic mortality are predicted to prioritize maintenance, leading to slower aging.

Purpose of the Study:

  • To test the prediction that long-lived species exhibit greater stress resistance.
  • To investigate calorie restriction as a potential evolutionary adaptation for life history plasticity.

Main Methods:

  • Comparative study of stress resistance in primary skin fibroblasts from different species.
  • Development of a theoretical model for optimizing resource allocation between maintenance and reproduction under varying food availability.

Main Results:

Related Experiment Videos

  • Cells from long-lived species demonstrated higher resistance to stressors.
  • The theoretical model supported the hypothesis that calorie restriction response is an evolutionary adaptation.

Conclusions:

  • Comparative and theoretical evidence supports the role of somatic maintenance and stress response in controlling aging rates.
  • Calorie restriction's effects may be an evolved mechanism for adapting to environmental variability, with implications for other species.