Cited by 626Neuroscience and Neuropharmacology ResearchGlycogen Storage Diseases and MyoclonusNeurogenesis and neuroplasticity mechanisms

Astrocyte glycogen and brain energy metabolism

Brown, Angus M., Ransom, Bruce R.·2007·Glia

Abstract

The brain contains glycogen but at low concentration compared with liver and muscle. In the adult brain, glycogen is found predominately in astrocytes. Astrocyte glycogen content is modulated by a number of factors including some neurotransmitters and ambient glucose concentration. Compelling evidence indicates that astrocyte glycogen breaks down during hypoglycemia to lactate that is transferred to adjacent neurons or axons where it is used aerobically as fuel. In the case of CNS white matter, this source of energy can extend axon function for 20 min or longer. Likewise, during periods of intense neural activity when energy demand exceeds glucose supply, astrocyte glycogen is degraded to lactate, a portion of which is transferred to axons for fuel. Astrocyte glycogen, therefore, offers some protection against hypoglycemic neural injury and ensures that neurons and axons can maintain their function during very intense periods of activation. These emerging principles about the roles of astrocyte glycogen contradict the long held belief that this metabolic pool has little or no functional significance. © 2007 Wiley‐Liss, Inc.

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Crossref · 10.1002/glia.20557

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3 of 3 references verified0 citation errors · 0 not checkable

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  • Under hypoxia, cerebrovascular accidents, highly-activated neurons, and other stress conditions, astrocytes release ATP, which provides energy for neuron activity.

    “Under hypoxia, cerebrovascular accidents, highly-activated neurons, and other stress conditions, astrocytes release ATP, which provides energy for neuron activity [23].”

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Authors
Brown, A. M., & Ransom, B. R.
Affiliations
University of Nottingham (GB)
Corresponding author
Brown, Angus M.
Venue
Glia
Publisher
Wiley
Published
2007-07-20
Volume
55
Issue
12
Pages
1263-1271
ISSN
  • 0894-1491 (ISSN-L)
  • 1098-1136
OpenAlex
W2161480852
Cited by
626
References
3
Citations by year
2026: 18 · 2025: 21 · 2024: 33 · 2023: 33 · 2022: 37 · 2021: 39 · 2020: 37 · 2019: 45 · 2018: 34 · 2017: 45 · 2016: 40 · 2015: 37 · 2014: 39 · 2013: 34 · 2012: 38
FWCI
1.77
Type
journal article
Language
en
Open access
closed
Locations
  • Glia (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Rheumatology › Glycogen Storage Diseases and Myoclonus
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
brain energy metabolism, hypoglycemia, lactate, white matter, glucose, neurotransmitters
MeSH terms
Animals, Astrocytes, Axons, Brain Chemistry, Energy Metabolism, Glycogen, Humans, Hypoglycemia

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