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Updated: Jul 12, 2026

Assessing Lysosomal Alkalinization in the Intestine of Live Caenorhabditis elegans

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Published on: April 13, 2018

Understanding the odd science of aging.

Thomas B L Kirkwood¹

¹Henry Wellcome Laboratory for Biogerontology Research, Institute for Ageing and Health, University of Newcastle, Newcastle upon Tyne NE4 6BE, United Kingdom. tom.kirkwood@ncl.ac.uk

|March 1, 2005

Summary

Aging arises from evolved limits in bodily repair, not programming, leading to accumulated damage. Ecological factors and diet influence lifespan by affecting trade-offs in growth, reproduction, and survival.

Area of Science:

Evolutionary biology
Gerontology
Ecology

Background:

Aging is not actively programmed but results from evolved limitations in somatic maintenance.
Accumulation of cellular and molecular damage is a key feature of the aging process.
Ecological factors significantly impact the evolution of lifespan and aging rates across species.

Purpose of the Study:

To explore the evolutionary basis of aging, focusing on somatic maintenance limitations.
To understand how ecological factors influence life history trade-offs and aging.
To elucidate the cellular and molecular mechanisms underlying age-related damage accumulation and repair.

Main Methods:

Analysis of evolutionary principles governing aging.
Examination of ecological influences on lifespan and aging rates.

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Review of cellular and molecular mechanisms of damage accumulation and repair.

Main Results:

Aging is driven by evolved constraints on self-repair, leading to damage buildup.
Ecological factors like hazard rates and food availability shape species-specific life spans and aging.
Dietary restriction can modify aging rates, highlighting the plasticity of the aging process.

Conclusions:

Understanding aging requires integrating evolutionary, ecological, and molecular perspectives.
Somatic maintenance limitations, influenced by ecological pressures, are central to aging.
Further research into damage accumulation and repair mechanisms is crucial for understanding aging.