Cited by 228Genetic Neurodegenerative DiseasesNeuroscience and Neuropharmacology ResearchNeurological disorders and treatments

Transgenic mice expressing a Huntington's disease mutation are resistant to quinolinic acid-induced striatal excitotoxicity

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Hansson, Oskar, Petersén, Åsa, Leist, Marcel, Nicotera, Pierluigi, Castilho, Roger F., Brundin, Patrik·1999·Proceedings of the National Academy of Sciences

Abstract

Huntington’s disease (HD) is a hereditary neurodegenerative disorder presenting with chorea, dementia, and extensive striatal neuronal death. The mechanism through which the widely expressed mutant HD gene mediates a slowly progressing striatal neurotoxicity is unknown. Glutamate receptor-mediated excitotoxicity has been hypothesized to contribute to the pathogenesis of HD. Here we show that transgenic HD mice expressing exon 1 of a human HD gene with an expanded number of CAG repeats (line R6/1) are strongly protected from acute striatal excitotoxic lesions. Intrastriatal infusions of the N -methyl- d -aspartate (NMDA) receptor agonist quinolinic acid caused massive striatal neuronal death in wild-type mice, but no damage in transgenic HD littermates. The remarkable neuroprotection in transgenic HD mice occurred at a stage when they had not developed any neurological symptoms caused by the mutant HD gene. At this stage there was no change in the number of striatal neurons and astrocytes in untreated R6/1 mice, although the striatal volume was decreased by 17%. Moreover, transgenic HD mice had normal striatal levels of NMDA receptors, calbindin D28k (calcium buffer), superoxide dismutase activity (antioxidant enzyme), Bcl-2 (anti-apoptotic protein), heat shock protein 70 (stress-induced anti-apoptotic protein), and citrate synthase activity (mitochondrial enzyme). We propose that the presence of exon 1 of the mutant HD gene induces profound changes in striatal neurons that render these cells resistant to excessive NMDA receptor activation.

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Authors
Hansson, O., Petersén, Å., Leist, M., Nicotera, P., Castilho, R. F., & Brundin, P.
Affiliations
Lund University (SE)
Venue
Proceedings of the National Academy of Sciences
Published
1999-07-20
Volume
96
Issue
15
Pages
8727-8732
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2063375748
Cited by
228
References
50
Citations by year
2025: 1 · 2024: 3 · 2023: 3 · 2022: 3 · 2021: 3 · 2020: 1 · 2019: 5 · 2018: 2 · 2017: 6 · 2016: 3 · 2015: 4 · 2014: 6 · 2013: 6 · 2012: 12
FWCI
6.28
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)
  • KOPS (University of Konstanz) (submittedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
  • Deutsche Forschungsgemeinschaft
  • Thorsten och Elsa Segerfalks Stiftelse
  • Medical Research Council
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Genetic Neurodegenerative Diseases
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
Keywords
Huntington's disease, quinolinic acid, NMDA receptor, neuroprotection, CAG repeat expansion, R6/1 transgenic mice, calbindin-D28k, superoxide dismutase, Bcl-2, HSP70, mitochondrial function, astrocytes
MeSH terms
Animals, Brain, Cell Count, Cell Survival, Corpus Striatum, Exons, Humans, Huntington Disease, Immunohistochemistry, Mice, Transgenic, Nerve Tissue Proteins, Neurotoxins, Biomarkers, Receptors, N-Methyl-D-Aspartate, N-Methylaspartate, Quinolinic Acid, In Situ Nick-End Labeling, Mice

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