Cited by 585Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchMitochondrial Function and Pathology

Alzheimer's disease is associated with reduced expression of energy metabolism genes in posterior cingulate neurons

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Liang, Winnie S., Reiman, Eric M., Valla, Jon, Dunckley, Travis, Beach, Thomas G., Grover, Andrew, Niedzielko, Tracey L., Schneider, Lonnie E. +8 more·2008·Proceedings of the National Academy of Sciences

Abstract

Alzheimer's disease (AD) is associated with regional reductions in fluorodeoxyglucose positron emission tomography (FDG PET) measurements of the cerebral metabolic rate for glucose, which may begin long before the onset of histopathological or clinical features, especially in carriers of a common AD susceptibility gene. Molecular evaluation of cells from metabolically affected brain regions could provide new information about the pathogenesis of AD and new targets at which to aim disease-slowing and prevention therapies. Data from a genome-wide transcriptomic study were used to compare the expression of 80 metabolically relevant nuclear genes from laser-capture microdissected non-tangle-bearing neurons from autopsy brains of AD cases and normal controls in posterior cingulate cortex, which is metabolically affected in the earliest stages; other brain regions metabolically affected in PET studies of AD or normal aging; and visual cortex, which is relatively spared. Compared with controls, AD cases had significantly lower expression of 70% of the nuclear genes encoding subunits of the mitochondrial electron transport chain in posterior cingulate cortex, 65% of those in the middle temporal gyrus, 61% of those in hippocampal CA1, 23% of those in entorhinal cortex, 16% of those in visual cortex, and 5% of those in the superior frontal gyrus. Western blots confirmed underexpression of those complex I–V subunits assessed at the protein level. Cerebral metabolic rate for glucose abnormalities in FDG PET studies of AD may be associated with reduced neuronal expression of nuclear genes encoding subunits of the mitochondrial electron transport chain.

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Crossref · 10.1073/pnas.0709259105

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57 of 57 references verified0 citation errors · 0 not checkable

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  • Compelling evidence links neurodegeneration to altered brain metabolism and mitochondrial dysfunction, both of which are early hallmarks of Alzheimer's disease.

    “Compelling evidence links neurodegeneration to altered brain metabolism and mitochondrial dysfunction, both of which are early hallmarks of AD [21–28].”
  • PET studies suggest marked cerebral glucose hypometabolism in brain tissue from LOAD patients decades before symptoms, correlated with decreased neuronal expression of Cx I-V subunits of mitochondrial electron transport chain in total brain extracts and specific brain areas including hippocampus and entorhinal cortex.

    “PET studies have suggested a marked cerebral glucose hypometabolism in brain tissue from LOAD patients decades before the symptoms arise, which was correlated with the decreased neuronal expression of Cx I-V subunits of the mitochondrial electron transport chain, in total brain extracts and in samples from specific brain areas, including the hippocampus and entorhinal cortex [60].”
  • Infection led to mitochondrial dysfunction evident by downregulation of Ndufa5 and Atp5j2.

    “At a sub-cellular level, infection led to mitochondrial dysfunction evident by downregulation of Ndufa5 (a structural subunit of complex I)85 and Atp5j286.”
  • Large transcriptomic studies using quantitative severity metrics and differentially vulnerable regions identified pathway-level changes in transcriptional regulation, apoptosis, cell proliferation, energy metabolism, and synaptic transmission in Alzheimer disease.

    “Large studies using quantitative metrics of severity140 and differentially vulnerable regions144 have identified pathway-level changes in transcriptional regulation, apoptosis, cell proliferation, energy metabolism and synaptic transmission.”
  • Reduced expression of genes involved in mitochondrial energy metabolism may become more pronounced in humans with cognitive decline and Alzheimer's disease.

    “Furthermore, reduced expression of genes involved in mitochondrial energy metabolism may become more pronounced in humans with cognitive decline and Alzheimer’s disease (20–22).”

    From Neural mechanisms of ageing and cognitive decline (2010) · cites this paper as [21]

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Authors
Liang, W. S., Reiman, E. M., Valla, J., Dunckley, T., Beach, T. G., Grover, A., Niedzielko, T. L., Schneider, L. E., Mastroeni, D., Caselli, R., Kukull, W., Morris, J. C., Hulette, C. M., Schmechel, D., Rogers, J., & Stephan, D. A.
Affiliations
  • Translational Genomics Research Institute (US)
  • Barrow Neurological Institute (US)
  • Banner Sun Health Research Institute (US)
  • Mayo Clinic (US)
  • National Alzheimer's Coordinating Center (US)
  • Washington University in St. Louis (US)
  • Duke Medical Center (US)
Venue
Proceedings of the National Academy of Sciences
Published
2008-03-18
Volume
105
Issue
11
Pages
4441-4446
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2102117809
Cited by
585
References
57
Citations by year
2026: 21 · 2025: 39 · 2024: 32 · 2023: 26 · 2022: 44 · 2021: 42 · 2020: 40 · 2019: 39 · 2018: 37 · 2017: 33 · 2016: 36 · 2015: 27 · 2014: 20 · 2013: 32 · 2012: 31
FWCI
19.41
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Barrow Neurological Foundation
  • National Alzheimer's Coordinating Center (U01AG016976)
  • National Institutes of Health (1k01ag024079-01a2)
  • National Institute on Aging (P30-AG-19610, AG05 128, R01AG023193, 1-RO1-AG023193, AG03991, U01AG016976, K01-AG-024079, AG-19610, P50AG005128, AG 05681, P 50 AG05681, P50AG005681, P30AG019610, P01 AG0 3991, P01AG003991)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
Keywords
Alzheimer's disease, energy metabolism genes, mitochondrial electron transport chain, posterior cingulate cortex, cerebral metabolic rate of glucose, FDG-PET, gene expression, neuronal transcriptome, middle temporal gyrus, hippocampal CA1, entorhinal cortex, visual cortex, normal aging, pathogenesis
MeSH terms
Aged, Alzheimer Disease, Brain, Energy Metabolism, Female, Gene Expression Regulation, Humans, Male, Neurons

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