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Related Concept Videos

Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
Mitochondrial Membranes01:45

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
Mitochondrial Membranes01:45

Mitochondrial Membranes

A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
The Inner Mitochondrial Membrane01:28

The Inner Mitochondrial Membrane

The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria.  In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...

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Related Experiment Video

Updated: Jul 3, 2026

Understanding the Changes in Mitochondrial Morphology through Dynamic and Three-dimensional Fluorescence Micrographs
08:15

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

Published on: August 15, 2025

Mitochondrial biogenesis and healthy aging.

Guillermo López-Lluch1, Pablo M Irusta, Placido Navas

  • 1Centro Andaluz de Biología del Desarrollo, Universidad Pablo de Olavide-CSIC, Carretera de Utrera Km 1, 41013 Sevilla, Spain.

Experimental Gerontology
|July 30, 2008
PubMed
Summary

Cellular aging involves mitochondrial damage. Maintaining mitochondrial health through biogenesis and turnover is key to healthy aging and preventing age-related diseases.

Related Experiment Videos

Last Updated: Jul 3, 2026

Understanding the Changes in Mitochondrial Morphology through Dynamic and Three-dimensional Fluorescence Micrographs
08:15

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

Published on: August 15, 2025

Area of Science:

  • Cellular Biology
  • Aging Research
  • Mitochondrial Dynamics

Background:

  • Aging leads to cellular deterioration and loss of function.
  • Mitochondria, crucial for energy and oxidative stress, are susceptible to damage over time.
  • Maintaining mitochondrial health is vital for energy production and preventing oxidative stress.

Purpose of the Study:

  • To explore the regulation of mitochondrial biogenesis and turnover.
  • To understand the role of peroxisome proliferator-activated receptor gamma coactivator-1alpha (PGC-1alpha) in mitochondrial maintenance.
  • To investigate the impact of factors like calorie restriction, resveratrol, and exercise on mitochondrial health.

Main Methods:

  • Review of endogenous and exogenous factors regulating mitochondrial biogenesis.
  • Analysis of PGC-1alpha activators (nitric oxide, CREB, AMPK) and suppressors (RIP140, 160MBP).
  • Examination of mitochondrial fission/fusion mechanisms and their regulatory proteins.

Main Results:

  • PGC-1alpha is a central regulator of mitochondrial biogenesis, influenced by various factors.
  • Calorie restriction, resveratrol, and exercise activate PGC-1alpha, promoting mitochondrial biogenesis.
  • Mitochondrial fission/fusion processes are also critical for mitochondrial maintenance.

Conclusions:

  • Dysregulation of mitochondrial biogenesis or fission/fusion is linked to aging and neuromuscular diseases.
  • Understanding these regulatory mechanisms is crucial for controlling the aging process.
  • Targeting mitochondrial health offers potential strategies for promoting healthy aging.