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[Nutrition and aging].

D Bunout1, V Cambiazo

  • 1Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago de Chile. dbunout@uec.inta.uchile.cl

Revista Medica De Chile
|August 7, 1999
PubMed
Summary

Environmental factors significantly impact aging and longevity. Caloric restriction, for instance, extends lifespan by reducing oxidative stress and DNA damage, offering insights into healthier aging.

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Area of Science:

  • Gerontology and genetics
  • Molecular biology and aging

Background:

  • Aging is influenced by both genetic predispositions and environmental factors.
  • Specific genes, like apolipoprotein E alleles (e.g., epsilon 4), are linked to age-related diseases and reduced lifespan.
  • Environmental factors, particularly caloric restriction, demonstrate a significant impact on longevity across species.

Purpose of the Study:

  • To explore the interplay between genetic and environmental influences on the aging process.
  • To investigate the mechanisms by which environmental factors, such as caloric restriction, affect longevity.
  • To understand the role of oxidative stress and telomere dynamics in aging and age-related diseases.

Main Methods:

  • Review of existing literature on genetic and environmental factors in aging.
  • Analysis of studies on caloric restriction in animal models (rats, mice, non-human primates).
  • Examination of the role of reactive oxygen species, DNA oxidative damage, and telomere shortening in aging.

Main Results:

  • Caloric restriction in animal models prolongs life and delays aging-related conditions.
  • Caloric restriction's benefits are primarily attributed to reduced reactive oxygen species generation and DNA oxidative damage.
  • Telomere shortening, susceptible to oxidative damage, acts as a cellular aging clock, with accelerated loss in premature aging syndromes.

Conclusions:

  • Environmental interventions, like caloric restriction, can modulate the aging process.
  • Reducing oxidative stress and DNA damage are key mechanisms for extending lifespan.
  • Understanding environmental influences on aging, including telomere dynamics, is crucial for increasing human healthspan and reducing age-related disabilities.

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