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Related Concept Videos

Mitochondria01:37

Mitochondria

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,...
Mitochondria01:37

Mitochondria

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,...
Mitochondrial Membranes01:45

Mitochondrial Membranes

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,...
Mitochondrial Membranes01:45

Mitochondrial Membranes

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,...
Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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...
Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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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Using Live Cell STED Imaging to Visualize Mitochondrial Inner Membrane Ultrastructure in Neuronal Cell Models
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Using Live Cell STED Imaging to Visualize Mitochondrial Inner Membrane Ultrastructure in Neuronal Cell Models

Published on: June 30, 2023

Mitochondria and neurodegeneration.

Lucia Petrozzi1, Giulia Ricci, Noemi J Giglioli

  • 1Department of Neuroscience, University of Pisa, Via Roma 67, Pisa, 56126, Italy. mmancuso@inwind.it

Bioscience Reports
|May 9, 2007
PubMed
Summary

Mitochondrial dysfunction is implicated in neurodegenerative diseases like Alzheimer's and Parkinson's. This review explores if mitochondrial issues are a key cause of neuronal damage in these conditions.

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Area of Science:

  • Neurobiology
  • Cellular Biology
  • Mitochondrial Medicine

Background:

  • Mitochondria are crucial for cellular energy and function.
  • Abnormalities in mitochondria are observed in neurodegenerative diseases.
  • The precise role of mitochondrial dysfunction in disease causation remains unclear.

Purpose of the Study:

  • To review the role of mitochondria in major neurodegenerative disorders.
  • To discuss the pathogenetic cascade involving mitochondria.
  • To address whether mitochondrial dysfunction is a necessary factor in neurodegeneration.

Main Methods:

  • Literature review of neurodegenerative diseases.
  • Analysis of evidence linking mitochondria to disease pathology.
  • Discussion of key findings from existing research.

Main Results:

  • Mitochondrial abnormalities are consistently reported across various neurodegenerative conditions.
  • Mitochondria play a significant role in the cellular processes leading to neuronal death.
  • Evidence suggests a strong correlation between mitochondrial dysfunction and disease progression.

Conclusions:

  • Mitochondrial dysfunction is a significant contributor to neurodegeneration.
  • Further research is needed to fully elucidate the causal relationship.
  • Targeting mitochondrial pathways may offer therapeutic strategies for neurodegenerative diseases.