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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,...
Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
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: Jun 22, 2026

Real-Time Measurement of the Mitochondrial Bioenergetic Profile of Neutrophils
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Real-Time Measurement of the Mitochondrial Bioenergetic Profile of Neutrophils

Published on: June 2, 2023

Mitochondria and energetic depression in cell pathophysiology.

Enn Seppet1, Marju Gruno1, Ants Peetsalu2

  • 1Department of Pathophysiology, University of Tartu, Tartu, Estonia.

International Journal of Molecular Sciences
|July 1, 2009
PubMed
Summary

Mitochondrial dysfunction underlies many diseases, causing cellular energetic depression (CED). Adaptive metabolic shifts, like the Warburg effect, can promote cell survival but may also drive cancer development.

Keywords:
cancerenergy depressionhypoxiainflammationmitochondriamitochondrial cell deathneurodegenerative diseases

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Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue
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Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue

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Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue
09:27

Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue

Published on: March 23, 2015

Area of Science:

  • Biochemistry
  • Cell Biology
  • Pathology

Background:

  • Mitochondrial dysfunction is implicated in numerous diseases, stemming from genetic mutations or external factors.
  • Cellular energetic depression (CED) results from impaired mitochondrial function, affecting cellular work capacity and homeostasis.
  • CED can lead to distinct cell death pathways, apoptosis or necrosis, collectively termed mitochondrial cell death (MCD).

Purpose of the Study:

  • To elucidate the role of mitochondrial dysfunction in disease pathogenesis.
  • To explore the adaptive cellular responses to mitochondrial impairments.
  • To investigate the link between metabolic adaptation and carcinogenesis.

Main Methods:

  • The study reviews existing literature on mitochondrial dysfunction and cellular metabolism.
  • It analyzes the mechanisms of CED and its consequences on cell death.
  • It examines the Warburg effect as a cellular adaptive strategy.

Main Results:

  • Mitochondrial dysfunction leads to CED, impacting ATP production and cellular control.
  • Apoptosis occurs with partial ATP generation, while necrosis follows severe ATP depletion.
  • Cellular adaptation via the Warburg effect (aerobic glycolysis) can prevent CED but may promote cancer.

Conclusions:

  • Mitochondrial dysfunction is a central mechanism in diverse pathologies.
  • Cellular adaptive responses, while protective, can have oncogenic implications.
  • Understanding these pathways is crucial for developing therapeutic strategies against mitochondrial diseases and cancer.