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Related Concept Videos

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...
Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70  chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial precursors...
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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Related Experiment Video

Updated: Jun 8, 2026

Remote Limb Ischemic Preconditioning: A Neuroprotective Technique in Rodents
07:52

Remote Limb Ischemic Preconditioning: A Neuroprotective Technique in Rodents

Published on: June 2, 2015

Mitochondrial preconditioning: a potential neuroprotective strategy.

Sónia C Correia1, Cristina Carvalho, Susana Cardoso

  • 1Center for Neuroscience and Cell Biology, University of Coimbra Coimbra, Portugal.

Frontiers in Aging Neuroscience
|September 15, 2010
PubMed
Summary
This summary is machine-generated.

Mitochondrial dysfunction drives neurodegeneration in Alzheimer's, Parkinson's, and stroke. Targeting mitochondria offers a promising strategy for neuroprotection and treating these brain disorders.

Keywords:
mitoKATP channelsmitochondrianeurodegenerationneuroprotectionpreconditioningreactive oxygen species

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Last Updated: Jun 8, 2026

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Experimental Models to Study the Neuroprotection of Acidic Postconditioning Against Cerebral Ischemia
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Area of Science:

  • Neuroscience
  • Cell Biology
  • Pathology

Background:

  • Mitochondria are crucial for neuronal cell death and dysfunction.
  • Mitochondrial dysfunction is central to Alzheimer's disease (AD), Parkinson's disease (PD), and ischemic stroke.
  • Mitochondria are implicated in neuroprotective preconditioning responses.

Purpose of the Study:

  • To review the role of mitochondrial malfunction in neurodegenerative diseases and stroke.
  • To discuss mitochondrial mechanisms in preconditioning-induced neuroprotection.

Main Methods:

  • Review of morphologic, biochemical, and molecular genetic studies.
  • Analysis of literature on mitochondrial roles in neurodegeneration and preconditioning.

Main Results:

  • Mitochondria are a convergence point for neurodegeneration.
  • Mitochondrial dysfunction is a hallmark of AD, PD, and stroke.
  • Mitochondrial reactive oxygen species and ATP-sensitive potassium channels are involved in preconditioning.

Conclusions:

  • Mitochondrial malfunction significantly contributes to neurodegenerative diseases and stroke.
  • Mitochondrial preconditioning presents a potential therapeutic approach for neuroprotection.