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Related Experiment Video

Updated: May 18, 2026

Real-Time Analysis of Bioenergetics in Primary Human Retinal Pigment Epithelial Cells Using High-Resolution Respirometry

Real-Time Analysis of Bioenergetics in Primary Human Retinal Pigment Epithelial Cells Using High-Resolution Respirometry

Published on: February 3, 2023

TAp73 depletion accelerates aging through metabolic dysregulation.

Alessandro Rufini¹, Maria Victoria Niklison-Chirou, Satoshi Inoue

¹Medical Research Council, Toxicology Unit, Leicester University, Leicester, United Kingdom.

Genes & Development

|September 19, 2012

Summary

The protein TAp73 protects against aging by controlling mitochondrial function and reducing reactive oxygen species (ROS). TAp73-null mice exhibit accelerated aging, increased oxidative damage, and cellular senescence.

Related Experiment Videos

Last Updated: May 18, 2026

Real-Time Analysis of Bioenergetics in Primary Human Retinal Pigment Epithelial Cells Using High-Resolution Respirometry

Real-Time Analysis of Bioenergetics in Primary Human Retinal Pigment Epithelial Cells Using High-Resolution Respirometry

Published on: February 3, 2023

Area of Science:

Biogerontology
Molecular Biology
Cellular Biology

Background:

Aging is linked to reduced ability to clear reactive oxygen species (ROS).
Mitochondrial dysfunction and oxidative stress are hallmarks of aging.

Purpose of the Study:

To investigate the role of TAp73 in aging and its impact on mitochondrial activity and ROS homeostasis.
To identify the molecular mechanisms by which TAp73 influences aging processes.

Main Methods:

Utilized TAp73-null mouse models to study aging phenotypes.
Assessed cellular ATP levels, oxygen consumption, and mitochondrial complex IV activity.
Investigated the regulatory relationship between TAp73 and cytochrome C oxidase subunit 4 (Cox4i1).

Main Results:

TAp73-null mice displayed accelerated aging, increased oxidative damage, and senescence.
TAp73 deletion led to reduced cellular ATP, oxygen consumption, and mitochondrial complex IV activity.
TAp73 directly targets Cox4i1, a subunit of mitochondrial complex IV; Cox4i1 knockdown mimicked TAp73-null cellular senescence.

Conclusions:

TAp73 plays a crucial role in protecting against aging by regulating mitochondrial respiration and ROS levels.
TAp73's regulation of Cox4i1 is a key mechanism contributing to its anti-aging effects.
Targeting TAp73 or its downstream pathways may offer therapeutic strategies for age-related decline.