Cited by 27Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsSphingolipid Metabolism and Signaling

Deletion of Specific Sphingolipids in Distinct Neurons Improves Spatial Memory in a Mouse Model of Alzheimer’s Disease

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Herzer, Silke, Hagan, Cassidy, von Gerichten, Johanna, Dieterle, Vanessa, Munteanu, Bogdan, Sandhoff, Roger, Hopf, Carsten, Nordström, Viola·2018·Frontiers in Molecular Neuroscience

Abstract

Alzheimer’s disease (AD) is characterized by progressive neurodegeneration and a concomitant loss of synapses and cognitive abilities. Recently, we have proposed that an alteration of neuronal membrane lipid microdomains increases neuronal resistance towards amyloid-β stress in cultured neurons and protects from neurodegeneration in a mouse model of AD. Lipid microdomains are highly enriched in a specific subclass of glycosphingolipids, termed gangliosides. The enzyme glucosylceramide synthase (GCS) catalyzes the rate-limiting step in the biosynthesis of these gangliosides. The present work now demonstrates that genetic GCS deletion in subsets of adult forebrain neurons significantly improves the spatial memory and counteracts the loss of dendritic spines in the hippocampal dentate gyrus of 5x familial AD mice (5xFAD//Ugcgf/f//Thy1-CreERT2//EYFP mice), when compared to 5xFAD//Ugcgf/f littermates (5xFAD mice). Aberrantly activated glial cells and their expression of pro-inflammatory cytokines have emerged as the major culprits for synaptic loss in AD. Typically, astrocytic activation is accompanied by a thickening of astrocytic processes, which impairs astrocytic support for neuronal synapses. In contrast to 5xFAD mice, 5xFAD//Ugcgf/f//Thy1-CreERT2//EYFP display a less pronounced thickening of astrocytic processes and a lower expression of TNF-α and IL1-α in the hippocampus. Thus, this work further emphasizes that GCS inhibition may constitute a potential therapeutic target against AD.

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Authors
Herzer, S., Hagan, C., von Gerichten, J., Dieterle, V., Munteanu, B., Sandhoff, R., Hopf, C., & Nordström, V.
Affiliations
  • German Cancer Research Center (DE)
  • Heidelberg University (DE)
Corresponding author
Nordström, Viola
Venue
Frontiers in Molecular Neuroscience
Published
2018-06-20
Volume
11
Pages
206-206
ISSN
1662-5099 (ISSN-L)
OpenAlex
W2806775328
Cited by
27
References
68
Citations by year
2026: 3 · 2025: 3 · 2024: 5 · 2023: 2 · 2022: 4 · 2021: 2 · 2020: 5 · 2019: 2 · 2018: 1
FWCI
1.72
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Molecular Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Alzheimer Forschung Initiative (Pilot Grant)
  • Deutsche Forschungsgemeinschaft (NO 1107/1-1, HE 7978/1-1)
  • Bundesministerium für Bildung und Forschung (grant No. 13FH8I03IA)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sphingolipid Metabolism and Signaling
Keywords
Alzheimer's disease, glucosylceramide synthase, gangliosides, sphingolipids, lipid microdomains, spatial memory, dendritic spines, dentate gyrus, 5xFAD mice, astrocyte activation, glial activation, inflammatory cytokines, TNF-α, IL-1α, amyloid-beta, neurodegeneration, synaptic loss, therapeutic target

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