Mitochondrial dysfunction and intracellular calcium dysregulation in ALS

Mech Ageing Dev. Jul-Aug 2010;131(7-8):517-26. doi: 10.1016/j.mad.2010.05.003. Epub 2010 May 20.


Amyotrophic lateral sclerosis (ALS) is a devastating neurodegenerative disorder that affects the aging population. A progressive loss of motor neurons in the spinal cord and brain leads to muscle paralysis and death. As in other common neurodegenerative diseases, aging-related mitochondrial dysfunction is increasingly being considered among the pathogenic factors. Mitochondria are critical for cell survival: they provide energy to the cell, buffer intracellular calcium, and regulate apoptotic cell death. Whether mitochondrial abnormalities are a trigger or a consequence of the neurodegenerative process and the mechanisms whereby mitochondrial dysfunction contributes to disease are not clear yet. Calcium homeostasis is a major function of mitochondria in neurons, and there is ample evidence that intracellular calcium is dysregulated in ALS. The impact of mitochondrial dysfunction on intracellular calcium homeostasis and its role in motor neuron demise are intriguing issues that warrants in depth discussion. Clearly, unraveling the causal relationship between mitochondrial dysfunction, calcium dysregulation, and neuronal death is critical for the understanding of ALS pathogenesis. In this review, we will outline the current knowledge of various aspects of mitochondrial dysfunction in ALS, with a special emphasis on the role of these abnormalities on intracellular calcium handling.

Publication types

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

MeSH terms

  • Age Factors
  • Aging / metabolism*
  • Amyotrophic Lateral Sclerosis / metabolism*
  • Amyotrophic Lateral Sclerosis / pathology
  • Amyotrophic Lateral Sclerosis / physiopathology
  • Animals
  • Astrocytes / metabolism
  • Calcium / metabolism*
  • Cell Death
  • Homeostasis
  • Humans
  • Mitochondria / metabolism*
  • Mitochondria / pathology
  • Motor Neurons / metabolism*
  • Motor Neurons / pathology
  • Superoxide Dismutase / metabolism
  • Superoxide Dismutase-1


  • SOD1 protein, human
  • Superoxide Dismutase
  • Superoxide Dismutase-1
  • Calcium