Brain mitochondrial dysfunction and oxidative damage in Parkinson’s disease
- First Online:
- 239 Downloads
Complex factors contribute to the appearance of Parkinson’s disease (PD), but with a constant mitochondrial involvement. There are two interdependent conditions in PD: brain mitochondrial dysfunction and brain mitochondrial oxidative damage. Mitochondrial dysfunction and reduced complex I activity are recognized in substantia nigra and in frontal cortex in PD patients. The molecular mechanism involved in the inactivation of complex I is likely accounted by the sum of ONOO− mediated reactions, reactions with free radical intermediates of the lipid peroxidation process and amine-aldehyde adduction reactions. The inhibitory effects on complex I lead synergistically to denaturation of the protein structure and to further increases of O2− and ONOO− production at the vicinity of complex I. An adaptive response in PD patients has been described with increases in mtNOS activity, mitochondrial mass and mitochondrial biogenesis. Mitochondrial dysfunction in the human frontal cortex is to be considered a factor contributing to impaired cognition in PD.
KeywordsComplex I Frontal cortex mitochondria Brain mitochondria in PD mtNOS
Unable to display preview. Download preview PDF.
- Boveris A, Chance B (1973) Biochem J 134:707–716Google Scholar
- Cutler RG (1991) Am J Clin Nutr 53:373S–379SGoogle Scholar
- Jellinger KA, Mizuno Y (2003) Parkinson’s disease. In: Dickson D (ed) Neurodegeneration: the molecular pathology of dementia and movement disorders. ISN Neuropath Press, Basel, pp 159–187Google Scholar
- Navarro A, Lopez-Cepero JM, Bandez MJ, Sanchez-Pino MJ, Gomez C, Cadenas E, Boveris A (2008) Am J Physiol Regul Integr Comp Physiol 294:R501–R509Google Scholar