Cited by 505Neuroscience and Neuropharmacology ResearchMitochondrial Function and PathologyAdvanced Neuroimaging Techniques and Applications

The energetics of CNS white matter

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Harris, Julia J., Attwell, David·2012·The Journal of Neuroscience

Abstract

The energetics of CNS white matter are poorly understood. We derive a signaling energy budget for the white matter (based on data from the rodent optic nerve and corpus callosum) which can be compared with previous energy budgets for the gray matter regions of the brain, perform a cost-benefit analysis of the energetics of myelination, and assess mechanisms for energy production and glucose supply in myelinated axons. We show that white matter synapses consume ≤0.5% of the energy of gray matter synapses and that this, rather than more energy-efficient action potentials, is the main reason why CNS white matter uses less energy than gray matter. Surprisingly, while the energetic cost of building myelin could be repaid within months by the reduced ATP cost of neuronal action potentials, the energetic cost of maintaining the oligodendrocyte resting potential usually outweighs the saving on action potentials. Thus, although it dramatically speeds action potential propagation, myelination need not save energy. Finally, we show that mitochondria in optic nerve axons could sustain measured firing rates with a plausible density of glucose transporters in the nodal membrane, without the need for energy transfer from oligodendrocytes.

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Crossref · 10.1523/jneurosci.3430-11.2012

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  • OL energy demand is enormous, reaching a maximum during early myelination and remaining at a high level throughout life.

    “To perform all of their tasks, OL energy demand is enormous, reaching a maximum during early myelination and remaining at a high level throughout life [284].”

    From Revisiting the Pathogenesis of X-Linked Adrenoleukodystrophy (2025) · cites this paper as [284]

    The Materials and Methods section, “The energetic costs and benefits of myelination” (page unavailable), describes an initial ATP cost for making myelin and an ongoing cost of maintaining the myelinating oligodendrocyte’s resting potential. The Discussion, “The energetic cost and benefit of myelin” (page unavailable), likewise reports substantial resting-potential expenditure. These passages support energy demands during myelination and afterward, but do not establish that oligodendrocyte demand peaks during early myelination or remains high throughout life. (LLM, conf=0.86)

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  1. Stryer L Biochemistry 1995 W. H. Freeman and Company 5th Edition

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Authors
Harris, J. J., & Attwell, D.
Affiliations
University College London (GB)
Corresponding author
Attwell, David
Venue
The Journal of Neuroscience
Published
2012-01-04
Volume
32
Issue
1
Pages
356-371
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1973747802
Cited by
505
References
104
Citations by year
2026: 40 · 2025: 40 · 2024: 41 · 2023: 50 · 2022: 42 · 2021: 55 · 2020: 31 · 2019: 32 · 2018: 33 · 2017: 36 · 2016: 34 · 2015: 19 · 2014: 18 · 2013: 26 · 2012: 8
FWCI
9.36
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • Wellcome Trust (075232)
  • Fondation Leducq
  • Medical Research Council
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
Keywords
myelination, optic nerve, corpus callosum, action potential propagation, mitochondrial energy production, glucose transporters, nodal membrane
MeSH terms
Action Potentials, Animals, Cell Membrane, Central Nervous System, Energy Metabolism, Glucose, Mitochondria, Models, Neurological, Myelin Sheath, Nerve Fibers, Myelinated, Neural Conduction, Oligodendroglia, Optic Nerve, Synapses, Glucose Transport Proteins, Facilitative, Rats

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