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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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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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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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Aging01:26

Aging

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
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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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Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

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The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
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Related Experiment Video

Updated: Jun 21, 2025

Visualization of Mitochondrial Respiratory Function using Cytochrome C Oxidase / Succinate Dehydrogenase COX/SDH Double-labeling Histochemistry
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Visualization of Mitochondrial Respiratory Function using Cytochrome C Oxidase / Succinate Dehydrogenase COX/SDH Double-labeling Histochemistry

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Mitochondrial dysfunction and its association with age-related disorders.

Indumathi Somasundaram1, Samatha M Jain2, Marcel Blot-Chabaud3

  • 1Biotechnology Engineering, Kolhapur Institute of Technology's College of Engineering, Kolhapur, India.

Frontiers in Physiology
|July 17, 2024
PubMed
Summary

Mitochondrial dysfunction accelerates aging by impairing cellular energy and increasing oxidative stress. Targeting mitochondrial health offers potential anti-aging strategies for age-related diseases.

Keywords:
ROS productionchromosomal aberrationsmitochondrial DNAmitochondrial dysfunctionmitophagy

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Author Spotlight: Decoding Mitochondrial Aging
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Area of Science:

  • Gerontology
  • Cell Biology
  • Biochemistry

Background:

  • Aging involves organelle functional decline, influenced by factors like oxidative stress and mitochondrial dysfunction.
  • Mitochondria are crucial for cellular energy, oxidative balance, and calcium regulation, making their dysfunction a key aging factor.
  • Mitophagy maintains mitochondrial integrity, but disruptions can lead to cellular damage and aging.

Purpose of the Study:

  • To review the role of mitochondrial dysfunction in aging.
  • To explore the link between mitochondrial dysfunction and age-related diseases.
  • To discuss potential anti-aging strategies targeting mitochondrial dysfunction.

Main Methods:

  • Literature review of aging processes.
  • Analysis of mitochondrial roles in cellular homeostasis.
  • Examination of factors contributing to mitochondrial dysfunction.

Main Results:

  • Mitochondrial dysfunction disrupts cellular energy, oxidative balance, and calcium homeostasis.
  • Increased oxidative stress and calcium uptake damage mitochondria, promoting apoptosis and mtDNA mutations.
  • Accumulated mitochondrial damage contributes to cellular dysfunction and aging.

Conclusions:

  • Mitochondrial dysfunction is a significant driver of aging and age-related degenerative diseases.
  • Maintaining mitochondrial integrity is crucial for cellular health during aging.
  • Targeting mitochondrial dysfunction presents promising avenues for anti-aging interventions.