Cited by 92Memory and Neural MechanismsNeuroscience and Neuropharmacology ResearchNeural dynamics and brain function

Supramammillary Nucleus Afferents to the Dentate Gyrus Co-release Glutamate and GABA and Potentiate Granule Cell Output

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Hashimotodani, Yuki, Karube, Fuyuki, Yanagawa, Yuchio, Fujiyama, Fumino, Kano, Masanobu·2018·Cell Reports

Abstract

The supramammillary nucleus (SuM) of the hypothalamus projects to the dentate gyrus (DG) and the CA2 region of the hippocampus. Although the SuM-to-hippocampus circuits have been implicated in spatial and emotional memory formation, little is known about precise neural connections between the SuM and hippocampus. Here, we report that axons of SuM neurons make monosynaptic connections to granule cells (GCs) and GABAergic interneurons, but not to hilar mossy cells, in the DG and co-release glutamate and γ-aminobutyric acid (GABA) at these synapses. Although inputs from the SuM can excite some interneurons, the inputs alone fail to generate spikes in GCs. However, despite the insufficient excitatory drive and GABAergic co-transmission, SuM inputs have net excitatory effects on GCs and can potentiate GC firing when temporally associated with perforant path inputs. Our results indicate that the SuM influences DG information processing by modulating GC outputs.

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Crossref · 10.1016/j.celrep.2018.11.016

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  • Optogenetic activation of SuM terminals in dentate gyrus produces monosynaptic short-latency release of both GABA and glutamate onto granule cells and interneurons.

    “Furthermore, optogenetic activation of SuM terminals in the DG produces monosynaptic, short-latency release of both GABA and glutamate onto postsynaptic granule cells and interneurons.29”

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Authors
Hashimotodani, Y., Karube, F., Yanagawa, Y., Fujiyama, F., & Kano, M.
Affiliations
  • Doshisha University (JP)
  • Gunma University (JP)
  • The University of Tokyo Institutes for Advanced Study (JP)
Corresponding author
  • Hashimotodani, Yuki
  • Kano, Masanobu
Venue
Cell Reports
Publisher
Elsevier BV
Published
2018-12
Volume
25
Issue
10
Pages
2704-2715.e4
ISSN
2211-1247 (ISSN-L)
OpenAlex
W2902420892
Cited by
92
References
63
Citations by year
2026: 13 · 2025: 10 · 2024: 15 · 2023: 16 · 2022: 13 · 2021: 8 · 2020: 10 · 2019: 7
FWCI
3.72
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Institutional Repositories DataBase (IRDB) (submittedVersion, cc-by)
Funders
  • Japan Society for the Promotion of Science (JSPS)
  • Brain Mapping by Integrated Neurotechnologies for Disease Studies (Brain/MINDS)
  • Strategic Research Program for Brain Sciences (SRPBS)
  • Japan Agency for Medical Research and Development (AMED)
  • Brain Science Foundation
  • Tokyo Society of Medical Sciences
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
supramammillary nucleus, dentate gyrus, granule cells, GABAergic interneurons, monosynaptic connections, perforant path, hippocampus, hypothalamus, mossy cells, synaptic potentiation
MeSH terms
Action Potentials, Afferent Pathways, Animals, gamma-Aminobutyric Acid, Hypothalamus, Posterior, Interneurons, Mice, Inbred C57BL, Synapses, Glutamic Acid, Dentate Gyrus, Perforant Pathway, Mossy Fibers, Hippocampal, Optogenetics

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