Life History Trade-offs within the Context of Mitochondrial Hormesis

Integrative and Comparative Biology
Wendy R HoodA N Kavazis

Abstract

Evolutionary biologists have been interested in the negative interactions among life history traits for nearly a century, but the mechanisms that would create this negative interaction remain poorly understood. One variable that has emerged as a likely link between reproductive effort and longevity is oxidative stress. Specifically, it has been proposed that reproduction generates free radicals that cause oxidative stress and, in turn, oxidative stress damages cellular components and accelerates senescence. We propose that there is limited support for the hypothesis because reactive oxygen species (ROS), the free radicals implicated in oxidative damage, are not consistently harmful. With this review, we define the hormetic response of mitochondria to ROS, termed mitochondrial hormesis, and describe how to test for a mitohormetic response. We interpret existing data using our model and propose that experimental manipulations will further improve our knowledge of this response. Finally, we postulate how the mitohormetic response curve applies to variation in animal performance and longevity.

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Citations

Jun 5, 2019·The Journal of Experimental Biology·Wendy R HoodAndreas N Kavazis
Feb 6, 2020·Biological Reviews of the Cambridge Philosophical Society·Kyle B Heine, Wendy R Hood
Sep 26, 2019·Proceedings. Biological Sciences·Geoffrey E HillYufeng Zhang
Jun 9, 2020·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Noel R ParkWendy R Hood
Sep 22, 2018·Integrative and Comparative Biology·Wendy R HoodKarine Salin
Jan 14, 2021·Trends in Ecology & Evolution·Rebecca E KochAntoine Stier
Aug 2, 2020·Mitochondrion·Rebecca BornsteinSimon C Johnson
Mar 13, 2021·The Journal of Experimental Biology·Yufeng Zhang, Hoi Shan Wong
Oct 23, 2020·Ageing Research Reviews·Stephen F VatnerDorothy E Vatner
Sep 28, 2021·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Daniel J Ritchie, Christopher R Friesen
Nov 4, 2021·Proceedings. Biological Sciences·Ben A FlanaganSuzanne Edmands

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