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Related Concept Videos

Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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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.
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Adaptive Mechanisms in Cancer Cells02:53

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Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
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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,...
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Mitochondria01:37

Mitochondria

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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,...
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mTOR Signaling and Cancer Progression03:03

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The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
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Related Experiment Video

Updated: May 4, 2026

Evaluating the Role of Mitochondrial Function in Cancer-related Fatigue
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Evaluating the Role of Mitochondrial Function in Cancer-related Fatigue

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Mitochondrial dysfunction in cancer.

Michelle L Boland1, Aparajita H Chourasia2, Kay F Macleod3

  • 1The Ben May Department for Cancer Research, The University of Chicago , Chicago, IL , USA ; Committee on Molecular Metabolism and Nutrition, The University of Chicago , Chicago, IL , USA.

Frontiers in Oncology
|December 19, 2013
PubMed
Summary

Mitochondrial dysfunction, beyond the Warburg effect, significantly impacts cancer cell growth and proliferation. Understanding these mechanisms offers new avenues for cancer diagnosis and treatment.

Keywords:
cancer metabolismcell cycle controlmitochondriamitochondrial biogenesismitochondrial fusion and fissionmitophagyoxidative phosphorylation

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Area of Science:

  • Cell Biology
  • Cancer Research
  • Mitochondrial Biology

Background:

  • Emerging research highlights mitochondrial dysfunction's role in cancer, extending beyond the Warburg effect.
  • Mitochondria influence cell cycle, gene expression, metabolism, and viability, crucial for cancer progression.
  • Oncogenes and tumor suppressors modulate mitochondrial dynamics, yet their clinical significance is under-appreciated.

Purpose of the Study:

  • To explore how mitochondrial dysfunction drives cell growth and tumorigenesis.
  • To investigate the interplay of mitochondrial dynamics, apoptosis, and mitophagy in cancer.
  • To define mitochondrial dysfunction and its potential for cancer diagnosis and treatment.

Main Methods:

  • Review of current literature on mitochondrial dysfunction in cancer.
  • Analysis of signaling pathways involving mitochondrial dynamics.
  • Examination of mitochondrial responses to physiological stresses like hypoxia.

Main Results:

  • Dysfunctional mitochondria modulate key cellular processes critical for cancer growth.
  • Mitochondrial dynamics (fission/fusion), apoptosis, mitophagy, and biogenesis are deregulated in cancer.
  • Mitochondrial mass and function variability in tumors impacts cancer progression.

Conclusions:

  • Mitochondrial dysfunction is a critical, under-explored factor in cancer development and progression.
  • Understanding these mitochondrial alterations can lead to novel diagnostic and therapeutic strategies.
  • Targeting mitochondrial pathways presents a promising frontier for cancer treatment.