Cited by 479Neuroscience and Neuropharmacology ResearchAmino Acid Enzymes and MetabolismAdvanced MRI Techniques and Applications

Brain lactate metabolism: the discoveries and the controversies

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Dienel, Gerald A·2012·Journal of Cerebral Blood Flow & Metabolism

Abstract

Potential roles for lactate in the energetics of brain activation have changed radically during the past three decades, shifting from waste product to supplemental fuel and signaling molecule. Current models for lactate transport and metabolism involving cellular responses to excitatory neurotransmission are highly debated, owing, in part, to discordant results obtained in different experimental systems and conditions. Major conclusions drawn from tabular data summarizing results obtained in many laboratories are as follows: Glutamate-stimulated glycolysis is not an inherent property of all astrocyte cultures. Synaptosomes from the adult brain and many preparations of cultured neurons have high capacities to increase glucose transport, glycolysis, and glucose-supported respiration, and pathway rates are stimulated by glutamate and compounds that enhance metabolic demand. Lactate accumulation in activated tissue is a minor fraction of glucose metabolized and does not reflect pathway fluxes. Brain activation in subjects with low plasma lactate causes outward, brain-to-blood lactate gradients, and lactate is quickly released in substantial amounts. Lactate utilization by the adult brain increases during lactate infusions and strenuous exercise that markedly increase blood lactate levels. Lactate can be an 'opportunistic', glucose-sparing substrate when present in high amounts, but most evidence supports glucose as the major fuel for normal, activated brain.

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Crossref · 10.1038/jcbfm.2011.175

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Authors
Dienel, G. A.
Affiliations
University of Arkansas for Medical Sciences (US)
Corresponding author
Dienel, Gerald A
Venue
Journal of Cerebral Blood Flow & Metabolism
Published
2011-12-21
Volume
32
Issue
7
Pages
1107-1138
ISSN
  • 0271-678X (ISSN-L)
  • 1559-7016
OpenAlex
W2032163981
Cited by
479
References
242
Citations by year
2026: 18 · 2025: 28 · 2024: 29 · 2023: 30 · 2022: 35 · 2021: 26 · 2020: 28 · 2019: 39 · 2018: 38 · 2017: 53 · 2016: 32 · 2015: 45 · 2014: 36 · 2013: 24 · 2012: 18
FWCI
2.32
Type
journal article
Language
en
Open access
Locations
  • Journal of Cerebral Blood Flow & Metabolism (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK081936, R01DK081936)
  • National Institute of Neurological Disorders and Stroke (NS038230, R01NS038230, R56NS038230)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Amino Acid Enzymes and Metabolism
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
Keywords
lactate transport, brain energy metabolism, synaptosomes, glucose transport, lactate utilization, physical activity, lactate signaling
MeSH terms
Animals, Brain, Energy Metabolism, Humans, Lactic Acid

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