Cited by 230Alzheimer's disease research and treatmentsNeurological Disorders and TreatmentsNeuroscience and Neuropharmacology Research

Protective effect of the energy precursor creatine against toxicity of glutamate and β-amyloid in rat hippocampal neurons

Brewer, Gregory J., Wallimann, Theo W.·2000·Journal of Neurochemistry

Abstract

The loss of ATP, which is needed for ionic homeostasis, is an early event in the neurotoxicity of glutamate and beta-amyloid (A(beta)). We hypothesize that cells supplemented with the precursor creatine make more phosphocreatine (PCr) and create larger energy reserves with consequent neuroprotection against stressors. In serum-free cultures, glutamate at 0.5-1 mM was toxic to embryonic hippocampal neurons. Creatine at >0.1 mM greatly reduced glutamate toxicity. Creatine (1 mM) could be added as late as 2 h after glutamate to achieve protection at 24 h. In association with neurotoxic protection by creatine during the first 4 h, PCr levels remained constant, and PCr/ATP ratios increased. Morphologically, creatine protected against glutamate-induced dendritic pruning. Toxicity in embryonic neurons exposed to A(beta) (25-35) for 48 h was partially prevented by creatine as well. During the first 6 h of treatment with A(beta) plus creatine, the molar ratio of PCr/ATP in neurons increased from 15 to 60. Neurons from adult rats were also partially protected from a 24-h exposure to A(beta) (25-35) by creatine, but protection was reduced in neurons from old animals. These results suggest that fortified energy reserves are able to protect neurons against important cytotoxic agents. The oral availability of creatine may benefit patients with neurodegenerative diseases.

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Crossref · 10.1046/j.1471-4159.2000.0741968.x

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Authors
Brewer, G. J., & Wallimann, T. W.
Affiliations
SIU Medicine (US)
Venue
Journal of Neurochemistry
Publisher
Wiley
Published
2000-05
Volume
74
Issue
5
Pages
1968-1978
ISSN
  • 0022-3042 (ISSN-L)
  • 1471-4159
OpenAlex
W1971233715
Cited by
230
References
96
Citations by year
2026: 5 · 2025: 5 · 2024: 4 · 2023: 8 · 2022: 9 · 2021: 4 · 2020: 6 · 2019: 10 · 2018: 10 · 2017: 3 · 2016: 10 · 2015: 9 · 2014: 12 · 2013: 6 · 2012: 4
FWCI
6.75
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neurochemistry (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute on Aging (R01 AG 13435, R01AG013435)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neurological Disorders and Treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
creatine, neuroprotection, glutamate excitotoxicity, amyloid-beta, hippocampal neurons, phosphocreatine, ATP depletion, energy reserves, dendritic pruning, aging, neurodegenerative diseases
MeSH terms
Aging, Animals, Cells, Cultured, Creatine, Dendrites, Energy Metabolism, Hippocampus, Intracellular Membranes, Neurons, Phosphocreatine, Amyloid beta-Peptides, Neuroprotective Agents, Glutamic Acid, Rats

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