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Interactions with and Membrane Permeabilization of Brain Mitochondria by Amyloid Fibrils
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Mitochondria and Alzheimer's disease: amyloid-beta peptide uptake and degradation by the presequence protease, hPreP

Nyosha Alikhani1, Maria Ankarcrona, Elzbieta Glaser

  • 1Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden.

Journal of Bioenergetics and Biomembranes
|October 3, 2009
PubMed

Insights

Mitochondrial dysfunction is linked to Alzheimer's disease (AD). Amyloid-beta peptides (Abeta) accumulate in brain mitochondria, causing dysfunction and potentially contributing to AD pathogenesis.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Biochemistry

Background:

  • Mitochondrial dysfunction is increasingly recognized as a key factor in Alzheimer's disease (AD) pathogenesis.
  • Amyloid-beta peptide (Abeta) accumulation has been observed within brain mitochondria of AD patients and models.
  • Abeta is known to induce mitochondrial dysfunction, including oxidative stress and impaired enzyme activity.

Purpose of the Study:

  • To review the intricate relationship between mitochondrial dysfunction and Alzheimer's disease.
  • To elucidate the mechanisms by which Abeta peptides enter mitochondria.
  • To discuss the role of recently identified proteases in degrading Abeta within mitochondria.

Main Methods:

  • Literature review of studies investigating mitochondrial dysfunction in Alzheimer's disease.
  • Analysis of in vitro and in vivo evidence regarding Abeta-mitochondria interactions.
  • Examination of research on Abeta-degrading enzymes in human brain mitochondria.

Main Results:

  • Evidence strongly supports a role for mitochondrial dysfunction in AD.
  • Abeta peptides are demonstrably taken up by mitochondria, leading to dysfunction.
  • Specific proteases capable of degrading Abeta have been identified in human brain mitochondria.

Conclusions:

  • Mitochondrial dysfunction is a significant contributor to Alzheimer's disease.
  • Understanding Abeta uptake and degradation in mitochondria offers potential therapeutic targets for AD.
  • Further research into mitochondrial pathways is crucial for developing effective AD treatments.

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