Cited by 41Neuroscience and Neuropharmacology ResearchAmino Acid Enzymes and MetabolismNeurogenesis and neuroplasticity mechanisms

Excitotoxicity Triggered by Neurobasal Culture Medium

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Hogins, Joshua, Crawford, Devon C., Zorumski, Charles F., Mennerick, Steven·2011·PLoS ONE

Abstract

Neurobasal defined culture medium has been optimized for survival of rat embryonic hippocampal neurons and is now widely used for many types of primary neuronal cell culture. Therefore, we were surprised that routine medium exchange with serum- and supplement-free Neurobasal killed as many as 50% of postnatal hippocampal neurons after a 4 h exposure at day in vitro 12-15. Minimal Essential Medium (MEM), in contrast, produced no significant toxicity. Detectable Neurobasal-induced neuronal death occurred with as little as 5 min exposure, measured 24 h later. D-2-Amino-5-phosphonovalerate (D-APV) completely prevented Neurobasal toxicity, implicating direct or indirect N-methyl-D-aspartate (NMDA) receptor-mediated neuronal excitotoxicity. Whole-cell recordings revealed that Neurobasal but not MEM directly activated D-APV-sensitive currents similar in amplitude to those gated by 1 µM glutamate. We hypothesized that L-cysteine likely mediates the excitotoxic effects of Neurobasal incubation. Although the original published formulation of Neurobasal contained only 10 µM L-cysteine, commercial recipes contain 260 µM, a concentration in the range reported to activate NMDA receptors. Consistent with our hypothesis, 260 µM L-cysteine in bicarbonate-buffered saline gated NMDA receptor currents and produced toxicity equivalent to Neurobasal. Although NMDA receptor-mediated depolarization and Ca²⁺ influx may support survival of young neurons, NMDA receptor agonist effects on development and survival should be considered when employing Neurobasal culture medium.

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Authors
Hogins, J., Crawford, D. C., Zorumski, C. F., & Mennerick, S.
Affiliations
Washington University in St. Louis (US)
Corresponding author
Mennerick, Steven
Venue
PLoS ONE
Published
2011-09-28
Volume
6
Issue
9
Pages
e25633
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2149959655
Cited by
41
References
42
Citations by year
2025: 1 · 2022: 3 · 2021: 2 · 2020: 6 · 2019: 3 · 2018: 3 · 2017: 8 · 2016: 7 · 2015: 5 · 2014: 1 · 2012: 2
FWCI
0.40
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institutes of Health (DA07261)
  • National Institute on Alcohol Abuse and Alcoholism (R01AA017413, AA017413)
  • National Institute of Mental Health (MH078823, MH07791, R01MH078823)
  • National Institute on Drug Abuse (DA07261, T32DA007261)
  • National Institute of Neurological Disorders and Stroke (F31NS066611, NS52823, NS066611)
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
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
excitotoxicity, NMDA receptor, cysteine, hippocampal neurons, neuronal cell death, D-APV, primary neuronal cultures, calcium influx
MeSH terms
Animals, Culture Media, Cysteine, Electric Conductivity, Female, Hippocampus, Male, Neurons, Neurotoxins, Receptors, N-Methyl-D-Aspartate, N-Methylaspartate, Cell Death, Cell Culture Techniques, Rats

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