Related Experiment Video
Updated: Aug 9, 2026
11:05
Analysis of Oxidative Stress in Zebrafish Embryos
Published on: July 7, 2014
[Ageing free radicals and cellular stress]
1Inserm UMR-S490, Université René Descartes, 45, rue des Saints Pères, 75270 Paris Cedex 06, France. robert.barouki@univ-paris5.fr
Medecine Sciences : M/S
|March 11, 2006
Summary
Oxidative stress, caused by reactive oxygen species, contributes to aging by damaging cells. Interventions like caloric restriction may mitigate aging by reducing oxidative stress and enhancing cellular resilience.
Area of Science:
- Gerontology
- Biochemistry
- Cell Biology
Context:
- Aging is a complex process with multiple contributing theories.
- The free radical theory posits that accumulated oxidants damage cellular components, leading to functional decline.
- Oxidative stress, an adaptive response to oxidant accumulation, is implicated in the aging organism.
Purpose:
- To review the role of oxidative stress and free radicals in aging processes.
- To explore the compatibility of the free radical theory with other aging models, such as caloric restriction and genetic pathways.
- To discuss the trade-off principle in the evolutionary context of aging.
Summary:
- Oxygen metabolism generates reactive species that cause oxidative damage to DNA, proteins, and lipids, altering cellular functions.
- Experimental evidence supports the free radical theory, linking aging to a state of oxidative stress.
- Caloric restriction and genetic modifications affecting pathways like Foxo can increase lifespan and resistance to oxidative damage.
Impact:
- Understanding oxidative stress in aging informs potential interventions to promote longevity and healthspan.
- The free radical theory, while not fully explaining all aspects of aging, remains a significant framework for research.
- The trade-off principle offers an evolutionary perspective on why aging-related damage may persist.
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