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Related Concept Videos

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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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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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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Visualization of Mitochondrial Respiratory Function using Cytochrome C Oxidase / Succinate Dehydrogenase COX/SDH Double-labeling Histochemistry
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Aberrant mitochondrial function in ageing and cancer.

Julia C Whitehall1, Laura C Greaves2

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Ageing and cancer share mitochondrial metabolism alterations. Mitochondrial DNA (mtDNA) mutations may drive these changes, potentially benefiting tumor growth and linking aging to cancer development.

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Area of Science:

  • Mitochondrial biology
  • Cancer research
  • Aging research

Background:

  • Mitochondrial metabolism alterations are hallmarks of aging and cancer.
  • Aging is a major risk factor for many cancer types.
  • Mitochondrial dysfunction in aging may relate to metabolic changes in cancer.

Purpose of the Study:

  • To explore the link between age-related mitochondrial dysfunction and cancer.
  • To investigate the role of mitochondrial genome (mtDNA) mutations in cancer development.
  • To review the metabolic consequences of mtDNA mutations.

Main Methods:

  • Review of basic mitochondrial functions.
  • Analysis of mtDNA mutagenesis mechanisms and metabolic consequences.
  • Evidence synthesis for and against mtDNA mutations in cancer.

Main Results:

  • Somatic mtDNA mutations are common in both aging and cancer cells.
  • These mutations may drive compensatory metabolic alterations.
  • Such alterations could be advantageous for tumor growth.

Conclusions:

  • mtDNA mutations are a potential driver of metabolic changes in cancer.
  • A link exists between age-related mitochondrial dysfunction and cancer metabolism.
  • Further research is needed to fully elucidate the role of mtDNA mutations in tumorigenesis.