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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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Peroxisomes and Mitochondria01:30

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Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration—the process that converts energy from food into ATP. Peroxisomes carry out a variety of functions, primarily breaking down different substances, such as fatty acids.
The peroxisome is a single membrane-bound cellular organelle that can perform several different functions, including lipid metabolism and chemical detoxification. The enzymes within...
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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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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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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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Electron Transport Chains01:28

Electron Transport Chains

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The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle.
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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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Do You Remember Mitochondria?

Flavia Messina1, Francesco Cecconi1,2,3, Carlo Rodolfo1

  • 1Department of Biology, University of Rome Tor Vergata, Rome, Italy.

Frontiers in Physiology
|April 16, 2020
PubMed
Summary
This summary is machine-generated.

Mitochondria play a crucial role in brain health and are vital for preventing memory loss associated with aging and neurodegenerative diseases like Alzheimer's. Understanding mitochondrial dynamics offers new therapeutic avenues for slowing cognitive decline.

Keywords:
agingmitochondriamitophagy and mitochondrial dynamicsneurodegenerative diseasesreactive oxygen species

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Author Spotlight: Decoding Mitochondrial Aging
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Author Spotlight: Decoding Mitochondrial Aging
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Area of Science:

  • Neuroscience
  • Cell Biology
  • Aging Research

Background:

  • Dementia and amnesia are common aging consequences, significantly impacting patients' lives and identity.
  • Mitochondria are dynamic organelles essential for neuronal function, synaptic plasticity, and energy supply.
  • Neurodegenerative diseases impair mitochondrial bioenergetics, leading to neuronal dysfunction and loss.

Purpose of the Study:

  • To review the role of mitochondria and their dynamics in aging-related neurodegenerative disorders.
  • To discuss challenges and future perspectives for targeting mitochondria therapeutically.

Main Methods:

  • Literature review on mitochondrial function in aging and neurodegeneration.
  • Analysis of current knowledge regarding mitochondrial dynamics.
  • Exploration of therapeutic strategies targeting mitochondria.

Main Results:

  • Mitochondrial dysfunction is a key factor in age-related cognitive decline and neurodegeneration.
  • Mitochondrial dynamics are critical for maintaining neuronal health and synaptic function.
  • Impaired mitochondrial bioenergetics contribute to neuron loss and impaired neural communication.

Conclusions:

  • Mitochondria and their dynamic nature are central to brain aging and neurodegenerative diseases.
  • Targeting mitochondrial function presents a promising therapeutic strategy for mitigating aging and neurodegenerative symptoms.
  • Further research into mitochondrial dynamics can unlock new treatments for dementia and related disorders.