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Evolution of longevity in mammals

D W Smith1

  • 1Department of Pathology, Northwestern University Medical School, Chicago, IL 60611-2611, USA.

Mechanisms of Ageing and Development
|June 30, 1995
PubMed
Summary

Species exhibit maximum life spans, with diverse longevity evolving independently in mammals. Genetic factors for somatic maintenance and disease resistance likely contribute to extended lifespans, including humans, with significant post-reproductive periods.

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Area of Science:

  • Evolutionary biology
  • Genetics
  • Gerontology

Background:

  • Maximum life span varies across mammalian species and orders.
  • Understanding the evolutionary drivers of longevity is crucial.

Purpose of the Study:

  • To explore the independent evolution of long-lived species clusters.
  • To identify potential genetic mechanisms underlying extended maximum life spans.

Main Methods:

  • Comparative analysis of mammalian life span data.
  • Review of genetic factors related to aging and mortality.

Main Results:

  • Evidence suggests independent evolution of longevity in related species groups.
  • Genes involved in somatic maintenance and disease resistance are implicated.
  • Human longevity, including its post-reproductive phase, is potentially explained by natural selection.

Conclusions:

  • Diverse evolutionary pathways likely contributed to maximum life span variation.
  • Genetic mechanisms for repair and resistance play a key role in longevity.
  • Natural selection may favor extended post-reproductive lifespans in certain species.

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