Cited by 622Alzheimer's disease research and treatmentsMitochondrial Function and PathologyDementia and Cognitive Impairment Research

Mitochondrial abnormalities in Alzheimer brain: Mechanistic implications

Bubber, Parvesh, Haroutunian, Vahram, Fisch, Gene, Blass, John P., Gibson, Gary E.·2005·Annals of Neurology

Abstract

Reductions in cerebral metabolism sufficient to impair cognition in normal individuals also occur in Alzheimer's disease (AD). The degree of clinical disability in AD correlates closely to the magnitude of the reduction in brain metabolism. Therefore, we tested whether impairments in tricarboxylic acid (TCA) cycle enzymes of mitochondria correlate with disability. Brains were from patients with autopsy‐confirmed AD and clinical dementia ratings (CDRs) before death. Significant ( p < 0.01) decreases occurred in the activities of the pyruvate dehydrogenase complex (−41%), isocitrate dehydrogenase (−27%), and the α‐ketoglutarate dehydrogenase complex (−57%). Activities of succinate dehydrogenase (complex II) (+44%) and malate dehydrogenase (+54%) were increased ( p < 0.01). Activities of the other four TCA cycle enzymes were unchanged. All of the changes in TCA cycle activities correlated with the clinical state ( p < 0.01), suggesting a coordinated mitochondrial alteration. The highest correlation was with pyruvate dehydrogenase complex ( r = 0.77, r 2 = 0.59). Measures to improve TCA cycle metabolism might benefit AD patients. Ann Neurol 2005;57:695–703

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Crossref · 10.1002/ana.20474

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  • Impaired activities of three key TCA enzyme complexes, pyruvate dehydrogenase, isocitrate dehydrogenase, and α-ketoglutarate dehydrogenase, were observed in postmortem AD brain and fibroblasts from AD patients.

    “Evidence for mitochondrial dysfunction in the AD pathogenesis comes from impaired activities of the three key TCA enzyme complexes, pyruvate dehydrogenase, isocitrate dehydrogenase, and α-ketoglutarate dehydrogenase, observed in postmortem AD brain and fibroblasts from AD patients74,75.”

    From Mitochondrial Approaches for Neuroprotection (2008) · cites this paper as [75]

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Authors
Bubber, P., Haroutunian, V., Fisch, G., Blass, J. P., & Gibson, G. E.
Affiliations
  • Cornell University (US)
  • Icahn School of Medicine at Mount Sinai (US)
  • Northwell Health (US)
Corresponding author
Gibson, Gary E.
Venue
Annals of Neurology
Publisher
Wiley
Published
2005-04-25
Volume
57
Issue
5
Pages
695-703
ISSN
  • 0364-5134 (ISSN-L)
  • 1531-8249
OpenAlex
W2152420555
Cited by
622
References
56
Citations by year
2026: 25 · 2025: 29 · 2024: 31 · 2023: 21 · 2022: 33 · 2021: 38 · 2020: 31 · 2019: 34 · 2018: 34 · 2017: 29 · 2016: 32 · 2015: 30 · 2014: 22 · 2013: 22 · 2012: 44
FWCI
13.58
Type
journal article
Language
en
Open access
closed
Locations
  • Annals of Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (AG11921, AG19589, R01AG019589, P01AG014930, AG 05138, P50AG005138, R01AG014600, R01AG011921, AG14930, AG-14600)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
Alzheimer's disease, mitochondrial dysfunction, TCA cycle, pyruvate dehydrogenase complex, isocitrate dehydrogenase, alpha-ketoglutarate dehydrogenase complex, succinate dehydrogenase, malate dehydrogenase, brain energy metabolism, clinical disability, cognitive impairment
MeSH terms
Aged, Aged, 80 and over, Aging, Alzheimer Disease, Animals, Brain, Choline O-Acetyltransferase, Citric Acid Cycle, Female, Humans, Male, Middle Aged, Mitochondria, Postmortem Changes, Psychiatric Status Rating Scales, Pyruvate Dehydrogenase Complex, Prefrontal Cortex, Mice, Plaque, Amyloid

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