Mitochondrial Permeability Transition Pore in Alzheimer's Disease: Cyclophilin D and Amyloid Beta

Biochim Biophys Acta. 2010 Jan;1802(1):198-204. doi: 10.1016/j.bbadis.2009.07.005. Epub 2009 Jul 16.

Abstract

Amyloid beta (Abeta) plays a critical role in the pathophysiology of Alzheimer's disease. Increasing evidence indicates mitochondria as an important target of Abeta toxicity; however, the effects of Abeta toxicity on mitochondria have not yet been fully elucidated. Recent biochemical studies in vivo and in vitro implicate mitochondrial permeability transition pore (mPTP) formation involvement in Abeta-mediated mitochondrial dysfunction. mPTP formation results in severe mitochondrial dysfunction such as reactive oxygen species (ROS) generation, mitochondrial membrane potential dissipation, intracellular calcium perturbation, decrease in mitochondrial respiration, release of pro-apoptotic factors and eventually cell death. Cyclophilin D (CypD) is one of the more well-known mPTP components and recent findings reveal that Abeta has significant impact on CypD-mediated mPTP formation. In this review, the role of Abeta in the formation of mPTP and the potential of mPTP inhibition as a therapeutic strategy in AD treatment are examined.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Alzheimer Disease / metabolism*
  • Amyloid beta-Peptides / metabolism*
  • Animals
  • Cyclophilin D
  • Cyclophilins / metabolism*
  • Humans
  • Mitochondria / metabolism
  • Mitochondrial Membrane Transport Proteins / metabolism*

Substances

  • Amyloid beta-Peptides
  • Cyclophilin D
  • Mitochondrial Membrane Transport Proteins
  • mitochondrial permeability transition pore
  • Cyclophilins