Mitochondrial dysfunction and oxidative stress in aging and neurodegenerative disease

被引:0
作者
Albers, DS [1 ]
Beal, MF [1 ]
机构
[1] Cornell Univ, Weill Med Coll, Dept Neurol & Neurosci, New York, NY 10021 USA
来源
JOURNAL OF NEURAL TRANSMISSION-SUPPLEMENT | 2000年 / 59期
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中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
A major risk factor for neurodegenerative diseases such as Parkinson's disease (PD), Huntington's disease (HD), amyotrophic lateral sclerosis (ALS), Alzheimer's disease (AD) and progressive supranuclear palsy (PSP) is aging. Two processes that have been implicated in aging are free radical-induced oxidative damage and mitochondrial dysfunction. A progressive impairment of mitochondrial function and/or increased oxidative damage has been suggested to play critical roles in the pathogenesis of these neurodegenerative diseases. For example, decreased complex I activity, increased oxidative damage and altered activities of antioxidant defense enzymes have been demonstrated in PD. In AD, decrements in complex IV activity and increased oxidative damage have been reported. Reductions in complex II activity, increased cortical lactate levels and oxidative damage have been described in HD. Some familial ALS cases are associated with mutations in the gene for Cu,Zn superoxide dismutase (SOD1) while increased oxidative damage is observed in sporadic ALS. Studies in PSP have demonstrated regionally specific reductions in brain and muscle mitochondrial function, hypofrontality and increased oxidative damage. Altogether, the age-dependent onset and progressive course of these neurodegenerative diseases may ultimately highlight an association between aging, mitochondrial impairment and oxidative stress.
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页码:133 / 154
页数:22
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