What question did this study set out to answer?

Investigate the molecular mechanisms by which amyloid beta is transported into mitochondria and define its exact sub-mitochondrial localization.

August 30, 2008Proceedings of the National Academy of SciencesOpen Access

The amyloid β-peptide is imported into mitochondria via the TOM import machinery and localized to mitochondrial cristae

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Authors

CPCamilla A. Hansson PetersenKarolinska Institutet NANyosha AlikhaniBayer (Norway)HBHomira BehbahaniKarolinska Institutet

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Implication

Experimental study demonstrates TOM-mediated mitochondrial import and cristae localization of amyloid beta in brain tissues, indicating a direct pathway for intracellular Alzheimer's pathology.

Key Points

Investigate the molecular mechanisms by which amyloid beta is transported into mitochondria and define its exact sub-mitochondrial localization.
Conducted in vitro import assays using isolated rat mitochondria treated with valinomycin to assess reliance on mitochondrial membrane potential.
Identified sub-mitochondrial localization using biochemical subfractionation and immunoelectron microscopy in rat samples and human cortical brain biopsies.
Monitored extracellular uptake and mitochondrial colocalization of amyloid beta in cultured human neuroblastoma cells.
Amyloid beta is actively transported into mitochondria through the translocase of the outer membrane (TOM) complex independently of the mitochondrial membrane potential.
Biochemical subfractionation and immunoelectron microscopy confirm amyloid beta accumulates specifically in the inner membrane cristae in rat mitochondria and human brain tissue.
Human neuroblastoma cells internalize extracellular amyloid beta, which subsequently colocalizes with mitochondrial markers.

Cite This Study

Petersen et al. (2008) studied this question.

synapsesocial.com/papers/69dd39ec99c691022d99b7d9 https://doi.org/10.1073/pnas.0806192105

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Implication

Experimental study demonstrates TOM-mediated mitochondrial import and cristae localization of amyloid beta in brain tissues, indicating a direct pathway for intracellular Alzheimer's pathology.

The amyloid β-peptide is imported into mitochondria via the TOM import machinery and localized to mitochondrial cristae

Discussion

Member takes

Implication

Key Points

Cite This Study

The amyloid β-peptide is imported into mitochondria via the TOM import machinery and localized to mitochondrial cristae

Discussion

Member takes

Implication

Key Points

Cite This Study

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