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Updated: Jul 19, 2026

Understanding the Changes in Mitochondrial Morphology through Dynamic and Three-dimensional Fluorescence Micrographs

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Published on: August 15, 2025

Mitochondrial signaling, TOR, and life span.

Stefan M Schieke¹, Toren Finkel

¹Cardiology Branch, National Heart, Lung, and Blood Institute, NHLBI, National Institutes of Health, Bethesda, MD 20892-1622, USA.

Biological Chemistry

|November 4, 2006

Summary

Mitochondrial metabolism and reactive oxygen species (ROS) are key to aging. This review highlights how mitochondrial signaling, particularly the TOR pathway, influences lifespan across species.

Area of Science:

Gerontology
Mitochondrial Biology
Cellular Metabolism

Background:

Mitochondrial metabolism and reactive oxygen species (ROS) are increasingly recognized for their roles in organismal aging and lifespan determination.
Cellular signaling pathways that govern mitochondrial function, ROS production, and retrograde signaling are critical areas of aging research.
The energy-sensing Target of Rapamycin (TOR) pathway has been implicated in both mitochondrial signaling and lifespan regulation.

Purpose of the Study:

To review recent advancements in understanding how mitochondrial signaling impacts the aging process.
To emphasize the role of TOR signaling in mitochondrial function and its connection to lifespan across diverse organisms.

Main Methods:

Literature review of recent studies on mitochondrial signaling and aging.

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Focus on studies investigating the TOR pathway's involvement in lifespan determination.

Comparative analysis of findings from invertebrates to humans.

Main Results:

Mitochondrial signaling pathways are central to aging.
TOR pathway activity is a significant determinant of lifespan.
Mitochondrial-derived signals, including those involving TOR, are conserved across species.

Conclusions:

Mitochondrial signaling, especially TOR pathway regulation, is a crucial factor in aging.
Understanding these pathways offers potential targets for interventions to modulate lifespan.
Further research into mitochondrial-TOR interactions is vital for aging science.