Neural Regeneration Research ›› 2013, Vol. 8 ›› Issue (4): 363-375.doi: 10.3969/j.issn.1673-5374.2013.04.009

Previous Articles     Next Articles

Control mechanisms in mitochondrial oxidative phosphorylation

Jana Hroudová, Zdeněk Fišar   

  1. Department of Psychiatry, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic
  • Received:2012-12-12 Revised:2013-01-20 Online:2013-02-05 Published:2013-02-05
  • Contact: Zdeněk Fi?ar, Ph.D., Professor, Department of Psychiatry, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Ke Karlovu 11, 121 08 Prague 2, Czech Republic, zfisar@lf1.cuni.cz.
  • About author:Jana Hroudová☆, Ph.D

Abstract:

Distribution and activity of mitochondria are key factors in neuronal development, synaptic plasticity and axogenesis. The majority of energy sources, necessary for cellular functions, originate from oxidative phosphorylation located in the inner mitochondrial membrane. The adenosine-5’- triphosphate production is regulated by many control mechanism–firstly by oxygen, substrate level, adenosine-5’-diphosphate level, mitochondrial membrane potential, and rate of coupling and proton leak. Recently, these mechanisms have been implemented by "second control mechanisms,” such as reversible phosphorylation of the tricarboxylic acid cycle enzymes and electron transport chain complexes, allosteric inhibition of cytochrome c oxidase, thyroid hormones, effects of fatty acids and uncoupling proteins. Impaired function of mitochondria is implicated in many diseases ranging from mitochondrial myopathies to bipolar disorder and schizophrenia. Mitochondrial dysfunctions are usually related to the ability of mitochondria to generate adenosine-5’-triphosphate in response to energy demands. Large amounts of reactive oxygen species are released by defective mitochondria, similarly, decline of antioxidative enzyme activities (e.g. in the elderly) enhances reactive oxygen species production. We reviewed data concerning neuroplasticity, physiology, and control of mitochondrial oxidative phosphorylation and reactive oxygen species production.