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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.
ROS generation is regulated and maintained at moderate levels necessary...
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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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Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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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,...
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Mitochondrial Membranes01:45

Mitochondrial Membranes

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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 Inner Mitochondrial Membrane01:28

The Inner Mitochondrial Membrane

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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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Animal Mitochondrial Genetics02:59

Animal Mitochondrial Genetics

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Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
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Author Spotlight: Transmitochondrial Cybrid Generation Using Cancer Cell Lines
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Decoding mitochondria's role in immunity and cancer therapy.

Yu Zhang1, Hong Yan1, Yuquan Wei1

  • 1Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No. 17, Block 3, Southern Renmin Road, 610041 Chengdu, Sichuan, PR China.

Biochimica Et Biophysica Acta. Reviews on Cancer
|May 11, 2024
PubMed
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Mitochondria play dual roles in cancer development and progression. Targeting mitochondrial abnormalities offers a promising new strategy for effective cancer therapy.

Keywords:
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Area of Science:

  • Cell Biology
  • Oncology
  • Immunology

Background:

  • Mitochondria are crucial for cellular energy production and biomolecule synthesis.
  • Mitochondrial functions and their link to cancer are increasingly recognized.
  • Mitochondria influence immune responses and cancer progression through various pathways.

Purpose of the Study:

  • To review the dual role of mitochondria in cancer.
  • To explore the interplay between mitochondrial function, immune response, and oncogenesis.
  • To discuss mitochondria as potential therapeutic targets for cancer treatment.

Main Methods:

  • Literature review of current research on mitochondria in cancer.
  • Analysis of the relationship between mitochondrial abnormalities and cancer development.
  • Examination of mitochondrial-targeted cancer therapies.

Main Results:

  • Mitochondrial protein abnormalities are linked to oncogenesis.
  • Aberrant intermediates and enzyme mutations contribute to cancer progression.
  • Mitochondria exhibit dual roles in cancer, promoting or inhibiting it.

Conclusions:

  • Mitochondria are implicated in both the generation and progression of cancer.
  • Targeting mitochondrial pathways presents a novel therapeutic strategy.
  • Further research into mitochondria-based cancer therapies is warranted.