Cited by 190Genetics, Aging, and Longevity in Model OrganismsTelomeres, Telomerase, and SenescenceEffects of Radiation Exposure

Biological Mechanisms Underlying the Aging Process: The ideas and techniques of genetics are being used to obtain new insight into the problems of aging.

Curtis, Howard J.·1963·Science

Abstract

Several theories put forward to explain the biological mechanisms underlying the aging process are examined. The only ones which attack the problem from the point of view of basic biological mechanisms are the wear-and- tear theory and the somatic mutation theory. The finding that radiation accelerates the aging process is a potent tool for attacking the problem experimentally. Experiments with mice specifically designed to verify the wear- and-tear theory showed conclusively that stress per se does not contribute to aging, and no experimental evidence could be found to support the theory. On the other hand, a great deal of evidence now available indicates that mutations in somatic cells play a dominant role in aging. It is further shown that the organs having cells which frequently undergo cell division take part in the aging process very little, if at all. Organs having cells which seldom, if ever, divide have no opportunity to throw off either spontaneous or induced mutations, and it is these organs which are responsible for the aging of the animal. Spontaneous mutations build up at a rapid rate in these organs. A cell may continue to function normally long after it has suffered a deleterious mutation, and thismore » accounts for much of the delay in the expression of radiation damage. It is suggested that the mutation rates for somatic celis are very much higher than the rates for gametic cells, and that this circumstance insures the death of the individual and the survival of the species. (auth)« less

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Crossref · 10.1126/science.141.3582.686

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  • A similar age-dependent increase in chromosomal instability has been known to occur in mammals for many years.

    “A similar age-dependent increase in chromosomal instability has been known to occur in mammals for many years 27”

    From The common biology of cancer and ageing (2007) · cites this paper as [27]

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Authors
Curtis, H. J.
Affiliations
Brookhaven National Laboratory (US)
Corresponding author
Curtis, Howard J.
Venue
Science
Published
1963-08-23
Volume
141
Issue
3582
Pages
686-694
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2088159749
Cited by
190
References
23
Citations by year
2026: 1 · 2023: 1 · 2022: 2 · 2021: 2 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 2 · 2016: 2 · 2015: 2 · 2014: 6 · 2013: 3 · 2012: 1
FWCI
19.70
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Effects of Radiation Exposure
Keywords
aging, somatic mutation theory, radiation-induced aging, spontaneous mutation, cell division, stress and aging
MeSH terms
Biological Phenomena, Genetics, Humans, Physiological Phenomena

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