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Antioxidants 2015, 4(4), 793-810; doi:10.3390/antiox4040793

Which Is the Most Significant Cause of Aging?

8 Foxlair Court, Durham, NC 27712, USA
Academic Editor: Adam Salmon
Received: 21 October 2015 / Revised: 19 November 2015 / Accepted: 2 December 2015 / Published: 17 December 2015
(This article belongs to the Special Issue Oxidative Stress and Aging: Past, Present and Future Concepts)
View Full-Text   |   Download PDF [465 KB, uploaded 17 December 2015]   |  

Abstract

It becomes clearer and clearer that aging is a result of a significant number of causes and it would seem that counteracting one or several of them should not make a significant difference. Taken at face value, this suggests, for example, that free radicals and reactive oxygen species do not play a significant role in aging and that the lifespan of organisms cannot be significantly extended. In this review, I point to the fact that the causes of aging synergize with each other and discuss the implications involved. One implication is that when two or more synergizing causes increase over time, the result of their action increases dramatically; I discuss a simple model demonstrating this. It is reasonable to conclude that this might explain the acceleration of aging and mortality with age. In this regard, the analysis of results and mortality patterns described in studies involving yeasts and Drosophila provides support for this view. Since the causes of aging are synergizing, it is also concluded that none of them is the major one but many including free radicals, etc. play significant roles. It follows that health/lifespan might be significantly extended if we eliminate or even attenuate the increase of a few or even just one of the causes of aging. While the synergism between the causes of aging is the main topic of this review, several related matters are briefly discussed as well. View Full-Text
Keywords: aging; reactive oxygen species; synergy; theory; oxidative stress; free radicals; lifespan aging; reactive oxygen species; synergy; theory; oxidative stress; free radicals; lifespan
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liochev, S.I. Which Is the Most Significant Cause of Aging? Antioxidants 2015, 4, 793-810.

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