Cell cycle (Georgetown, Tex.)Oct 18, 2021

Early-life reactive oxygen species and gene regulation influence lifespan

Updated Mar 30, 2026

Abstract

Naturally occurring variations in reactive oxygen species levels early in life may contribute to individual lifespan variability in a genetically identical population.

Genetically identical animals in the same environment show significant differences in lifespan.
Stochasticity factors are believed to play a major role in this lifespan variability.
Variations in reactive oxygen species early in life are linked to differences in lifespan.
These variations may act as stochasticity factors influencing aging.
Developmental events can positively influence lifespan and stress responses through specific regulatory mechanisms.

Simplified

Studies inhave revealed that even a genetically identical population of animals exposed to the same environment displays a remarkable level of variability in individual lifespan. Stochasticity factors, occurring seemingly by chance or at random, are thought to account for a large part of this variability. Recent studies in our lab usingnow revealed that naturally occurring variations in the levels of reactive oxygen species experienced early in life contribute to the observed lifespan variability, and likely serve as stochasticity factors in aging. Here, we will highlight how developmental events can positively shape lifespan and stress responses via a redox-sensitive epigenetic regulator, and discuss the outstanding questions and future directions on the complex relationship between reactive oxygen species and aging. Caenorhabditis elegans C. elegans

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