Cited by 475Mitochondrial Function and PathologyAlzheimer's disease research and treatmentsDementia and Cognitive Impairment Research

A selective defect of cytochrome c oxidase is present in brain of Alzheimer disease patients

Maurer, I·2000·Neurobiology of Aging

Abstract

To assess mitochondrial function and test the hypothesis of an underlying oxidative phosphorylation defect in Alzheimer disease (AD), we evaluated the activities of mitochondrial respiratory chain enzyme complexes I+III, complexes II+III, complex IV (cytochrome c oxidase, COX), succinate dehydrogenase, and citrate synthase in the frontal cortex, temporal cortex, hippocampus, and cerebellum of 23 AD patients and 13 normal human brains. The major finding was a significant decrease in COX activity in AD temporal cortex and hippocampus, both whether activities were expressed per noncollagen protein content (49 +/-4.6 versus 78+/-10.8 nmol/min/mg NCP, P = 0.006; 23+/-1.9 versus 48.6+/-8.1 nmol/min/mg NCP, p = 0.003) or corrected for citrate synthase activity (1.6+/-0.2 versus 3+/-0.4, P = 0.001; 0.76+/-0.1 versus 1.76+/-0.26, P = 0.0009). There were no significant differences in the activities of complexes I+III, II+III, and of succinate dehydrogenase in any of the brain regions examined. Our results suggest a specific defect of COX in the AD brain versus the normal human brain, which may contribute to impaired energy generation. Biochemically, the defect is confined to selected brain regions, suggesting anatomic specificity.

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Crossref · 10.1016/s0197-4580(00)00112-3

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Authors
Maurer, I.
Affiliations
Friedrich Schiller University Jena (DE)
Corresponding author
Maurer, I
Venue
Neurobiology of Aging
Publisher
Elsevier BV
Published
2000-06
Volume
21
Issue
3
Pages
455-462
ISSN
0197-4580 (ISSN-L)
OpenAlex
W2006909664
Cited by
475
References
3
Citations by year
2026: 7 · 2025: 12 · 2024: 10 · 2023: 21 · 2022: 24 · 2021: 23 · 2020: 29 · 2019: 25 · 2018: 22 · 2017: 18 · 2016: 24 · 2015: 19 · 2014: 18 · 2013: 26 · 2012: 22
FWCI
1.81
Type
journal article
Language
en
Open access
closed
Locations
  • Neurobiology of Aging (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
Alzheimer's disease, cytochrome c oxidase, mitochondrial dysfunction, oxidative phosphorylation, respiratory chain complexes, citrate synthase, succinate dehydrogenase, hippocampus, temporal cortex, frontal cortex, cerebellum, brain energy metabolism
MeSH terms
Aged, Aged, 80 and over, Alzheimer Disease, Brain, Cerebral Cortex, Electron Transport Complex IV, Female, Hippocampus, Humans, Male, Middle Aged, Mitochondria, Oxidative Phosphorylation, Succinate Dehydrogenase

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