Cited by 97Neuroscience and Neuropharmacology ResearchWnt/β-catenin signaling in development and cancerGenetics and Neurodevelopmental Disorders

Role of the Wnt receptor Frizzled-1 in presynaptic differentiation and function

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Varela-Nallar, Lorena, Grabowski, Catalina P, Alfaro, Iván E, Alvarez, Alejandra R, Inestrosa, Nibaldo C·2009·Neural Development

Abstract

BACKGROUND: The Wnt signaling pathway regulates several fundamental developmental processes and recently has been shown to be involved in different aspects of synaptic differentiation and plasticity. Some Wnt signaling components are localized at central synapses, and it is thus possible that this pathway could be activated at the synapse. RESULTS: We examined the distribution of the Wnt receptor Frizzled-1 in cultured hippocampal neurons and determined that this receptor is located at synaptic contacts co-localizing with presynaptic proteins. Frizzled-1 was found in functional synapses detected with FM1-43 staining and in synaptic terminals from adult rat brain. Interestingly, overexpression of Frizzled-1 increased the number of clusters of Bassoon, a component of the active zone, while treatment with the extracellular cysteine-rich domain (CRD) of Frizzled-1 decreased Bassoon clustering, suggesting a role for this receptor in presynaptic differentiation. Consistent with this, treatment with the Frizzled-1 ligand Wnt-3a induced presynaptic protein clustering and increased functional presynaptic recycling sites, and these effects were prevented by co-treatment with the CRD of Frizzled-1. Moreover, in synaptically mature neurons Wnt-3a was able to modulate the kinetics of neurotransmitter release. CONCLUSION: Our results indicate that the activation of the Wnt pathway through Frizzled-1 occurs at the presynaptic level, and suggest that the synaptic effects of the Wnt signaling pathway could be modulated by local activation through synaptic Frizzled receptors.

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Authors
Varela-Nallar, L., Grabowski, C. P., Alfaro, I. E., Alvarez, A. R., & Inestrosa, N. C.
Affiliations
Pontificia Universidad Católica de Chile (CL)
Corresponding author
Inestrosa, Nibaldo C
Venue
Neural Development
Published
2009-11-02
Volume
4
Issue
1
Pages
41-41
ISSN
1749-8104 (ISSN-L)
OpenAlex
W2129879090
Cited by
97
References
44
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 5 · 2021: 5 · 2020: 5 · 2019: 3 · 2018: 9 · 2017: 3 · 2016: 9 · 2015: 10 · 2014: 12 · 2013: 15 · 2012: 5
FWCI
2.22
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Neural Development (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Americanae (AECID Library) (submittedVersion, cc-by-nc-nd)
  • Americanae (AECID Library) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, other-oa)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, cc-by-nc-nd)
Funders
  • University of Washington
  • Comisión Nacional de Investigación Científica y Tecnológica
  • National Cancer Institute
  • Fondo de Financiamiento de Centros de Investigación en Áreas Prioritarias
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
Frizzled-1, Wnt signaling, presynaptic differentiation, synaptic plasticity, bassoon, active zone, Wnt3a, cysteine-rich domain, hippocampal neurons, presynaptic proteins
MeSH terms
Aging, Animals, Cell Differentiation, Cells, Cultured, Hippocampus, Kinetics, Neurons, Synapses, Synaptic Vesicles, Synaptosomes, Signal Transduction, Rats, Sprague-Dawley, Presynaptic Terminals, Receptors, Neurotransmitter, Neurotransmitter Agents, Receptors, G-Protein-Coupled, Wnt Proteins, Frizzled Receptors, Rats, Wnt3 Protein

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