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Mitochondrial permeability transition pore in Alzheimer's disease: cyclophilin D and amyloid beta

Heng Du1, Shirley ShiDu Yan

  • 1Departments of Pathology and Cell Biology, Surgery, and The Taub institute for Research on Alzheimer's Disease and the Aging Brain, College of Physicians and Surgeons of Columbia University, 630 W. 168th Street, New York, NY 10032, USA.

Biochimica Et Biophysica Acta
|July 21, 2009
PubMed

Insights

Amyloid beta (Abeta) toxicity in Alzheimer's disease (AD) triggers mitochondrial dysfunction by opening the mitochondrial permeability transition pore (mPTP). Inhibiting mPTP formation offers a potential therapeutic strategy for AD.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Biochemistry

Background:

  • Alzheimer's disease (AD) pathophysiology involves amyloid beta (Abeta) toxicity.
  • Mitochondria are key targets of Abeta-induced cellular damage.
  • The precise mechanisms of Abeta's impact on mitochondrial function require further elucidation.

Purpose of the Study:

  • To review the role of Abeta in mitochondrial permeability transition pore (mPTP) formation.
  • To examine the potential of mPTP inhibition as a therapeutic strategy for Alzheimer's disease.

Main Methods:

  • Biochemical studies (in vivo and in vitro) implicating mPTP formation in Abeta-mediated mitochondrial dysfunction.
  • Focus on Cyclophilin D (CypD) as a key component of the mPTP complex.

Main Results:

  • Abeta toxicity leads to mPTP opening, causing severe mitochondrial dysfunction.
  • Dysfunction includes increased reactive oxygen species (ROS) generation, loss of mitochondrial membrane potential, calcium dysregulation, impaired respiration, and apoptosis.
  • Abeta significantly influences CypD-mediated mPTP formation.

Conclusions:

  • Abeta-induced mPTP formation is a critical mechanism underlying mitochondrial dysfunction in Alzheimer's disease.
  • Targeting mPTP formation, particularly through CypD modulation, presents a promising therapeutic avenue for AD treatment.

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