Cited by 897Neuroscience and Neuropharmacology ResearchAdvanced MRI Techniques and ApplicationsAmino Acid Enzymes and Metabolism

Stoichiometric coupling of brain glucose metabolism and glutamatergic neuronal activity.

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Sibson, Nicola R., Dhankhar, Ajay, Mason, Graeme F., Rothman, Douglas L., Behar, Kevin L., Shulman, Robert G.·1998·Proceedings of the National Academy of Sciences

Abstract

To determine the relationship between cerebral Glc metabolism and glutamatergic neuronal function, we used 13C NMR spectroscopy to measure, simultaneously, the rates of the tricarboxylic acid cycle and Gln synthesis in the rat cortex in vivo. From these measurements, we calculated the rates of oxidative Glc metabolism and glutamate-neurotransmitter cycling between neurons and astrocytes (a quantitative measure of glutamatergic neuronal activity). By measuring the rates of the tricarboxylic acid cycle and Gln synthesis over a range of synaptic activity, we have determined the stoichiometry between oxidative Glc metabolism and glutamate-neurotransmitter cycling in the cortex to be close to 1:1. This finding indicates that the majority of cortical energy production supports functional (synaptic) glutamatergic neuronal activity. Another implication of this result is that brain activation studies, which map cortical oxidative Glc metabolism, provide a quantitative measure of synaptic glutamate release.

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Crossref · 10.1073/pnas.95.1.316

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Authors
Sibson, N. R., Dhankhar, A., Mason, G. F., Rothman, D. L., Behar, K. L., & Shulman, R. G.
Affiliations
Yale University (US)
Venue
Proceedings of the National Academy of Sciences
Published
1998-01-06
Volume
95
Issue
1
Pages
316-321
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2053268711
Cited by
897
References
34
Citations by year
2026: 19 · 2025: 26 · 2024: 18 · 2023: 21 · 2022: 32 · 2021: 48 · 2020: 23 · 2019: 27 · 2018: 33 · 2017: 37 · 2016: 30 · 2015: 20 · 2014: 45 · 2013: 34 · 2012: 39
FWCI
13.71
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (2RO1 DK27121, R01DK027121)
  • National Institute of Neurological Disorders and Stroke (R01 NS 34813, R29NS032126, R29 NS32126, R01NS034813)
  • National Center for Research Resources
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (P01HD032573)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Amino Acid Enzymes and Metabolism
Keywords
brain glucose metabolism, TCA cycle, glutamine synthesis, glucose oxidation, astrocytes, synaptic activity, glutamate release, 13C NMR
MeSH terms
Anesthetics, Animals, Blood Glucose, Cerebral Cortex, Citric Acid Cycle, Electroencephalography, gamma-Aminobutyric Acid, Glucose, Glutamine, Kinetics, Male, Neurons, Magnetic Resonance Spectroscopy, Oxidation-Reduction, Rats, Sprague-Dawley, Neurotransmitter Agents, Rats

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