Cited by 469Neural dynamics and brain functionNeuroscience and Neuropharmacology ResearchMemory and Neural Mechanisms

Complementary Roles of Cholecystokinin- and Parvalbumin-Expressing GABAergic Neurons in Hippocampal Network Oscillations

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Klausberger, Thomas, Marton, Laszlo F., O'Neill, Joseph, Huck, Jojanneke H. J., Dalezios, Yannis, Fuentealba, Pablo, Suen, Wai Yee, Papp, Edit +4 more·2005·The Journal of Neuroscience

Abstract

In the hippocampal CA1 area, a relatively homogenous population of pyramidal cells is accompanied by a diversity of GABAergic interneurons. Previously, we found that parvalbumin-expressing basket, axo-axonic, bistratified, and oriens-lacunosum moleculare cells, innervating different domains of pyramidal cells, have distinct firing patterns during network oscillations in vivo. A second family of interneurons, expressing cholecystokinin but not parvalbumin, is known to target the same domains of pyramidal cells as do the parvalbumin cells. To test the temporal activity of these independent and parallel GABAergic inputs, we recorded the precise spike timing of identified cholecystokinin interneurons during hippocampal network oscillations in anesthetized rats and determined their molecular expression profiles and synaptic targets. The cells were cannabinoid receptor type 1 immunopositive. Contrary to the stereotyped firing of parvalbumin interneurons, cholecystokinin-expressing basket and dendrite-innervating cells discharge, on average, with 1.7 +/- 2.0 Hz during high-frequency ripple oscillations in an episode-dependent manner. During theta oscillations, cholecystokinin-expressing interneurons fire with 8.8 +/- 3.3 Hz at a characteristic time on the ascending phase of theta waves (155 +/- 81 degrees), when place cells start firing in freely moving animals. The firing patterns of some interneurons recorded in drug-free behaving rats were similar to cholecystokinin cells in anesthetized animals. Our results demonstrate that cholecystokinin- and parvalbumin-expressing interneurons make different contributions to network oscillations and play distinct roles in different brain states. We suggest that the specific spike timing of cholecystokinin interneurons and their sensitivity to endocannabinoids might contribute to differentiate subgroups of pyramidal cells forming neuronal assemblies, whereas parvalbumin interneurons contribute to synchronizing the entire network.

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Crossref · 10.1523/jneurosci.3269-05.2005

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  • The defining anatomical feature of CCKBCs is preferential perisomatic axonal targeting within stratum pyramidale to surround the soma and proximal dendrites of pyramidal cells.

    “Like PVBCs, the defining anatomical feature of CCKBCs is preferential perisomatic axonal targeting within s.p. to surround the soma and proximal dendrites of pyramidal cells (FIGURE 2E) (224, 352, 584, 1036, 1172).”

    From Hippocampal GABAergic Inhibitory Interneurons (2017) · cites this paper as [584]

  • ADIs are similar to SCAs but preferentially innervate the main apical shaft of pyramidal cells avoiding oblique and basal dendrites.

    “Apical dendrite targeting interneurons (ADIs) are similar to SCAs but preferentially innervate the main apical shaft of pyramidal cells avoiding oblique and basal dendrites (584).”

    From Hippocampal GABAergic Inhibitory Interneurons (2017) · cites this paper as [584]

  • A minority (~8%) of CCK-expressing dendrite targeting cell terminals innervate other interneurons.

    “All CCK-expressing dendrite targeting cells dominantly target principal cell postsynaptic targets with ~6 synapses per connection; however, a minority of terminals (~8%) innervate other interneurons (102, 224, 584, 1172).”

    From Hippocampal GABAergic Inhibitory Interneurons (2017) · cites this paper as [584]

  • The axons of PPAs concentrate within s.l.m. overlapping with excitatory inputs from the entorhinal cortex and nucleus reuniens targeting the distal apical tufts of CA1 pyramidal cells.

    “The axons of perforant path-associated cells (PPAs) concentrate within s.l.m. overlapping with excitatory inputs from the entorhinal cortex and nucleus reuniens targeting the distal apical tufts of CA1 pyramidal cells (584, 1172).”

    From Hippocampal GABAergic Inhibitory Interneurons (2017) · cites this paper as [584]

  • PPAs also extend axon collaterals across the hippocampal fissure to target the dendrites of granule cells further aligning their output with excitatory entorhinal input to the hippocampus.

    “However, PPAs also extend axon collaterals across the hippocampal fissure to target the dendrites of granule cells further aligning their output with excitatory entorhinal input to the hippocampus (452, 584, 1172).”

    From Hippocampal GABAergic Inhibitory Interneurons (2017) · cites this paper as [584]

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Authors
Klausberger, T., Marton, L. F., O'Neill, J., Huck, J. H. J., Dalezios, Y., Fuentealba, P., Suen, W. Y., Papp, E., Kaneko, T., Watanabe, M., Csicsvari, J., & Somogyi, P.
Affiliations
  • University of Oxford (GB)
  • Kyoto University (JP)
  • Hokkaido University (JP)
Venue
The Journal of Neuroscience
Published
2005-10-19
Volume
25
Issue
42
Pages
9782-9793
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2103322364
Cited by
469
References
76
Citations by year
2026: 16 · 2025: 26 · 2024: 17 · 2023: 20 · 2022: 17 · 2021: 20 · 2020: 23 · 2019: 15 · 2018: 27 · 2017: 19 · 2016: 25 · 2015: 24 · 2014: 28 · 2013: 19 · 2012: 19
FWCI
9.23
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (acceptedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (submittedVersion)
Funders
Austrian Science Fund (P16637)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
cholecystokinin interneurons, parvalbumin interneurons, GABAergic interneurons, hippocampal CA1, theta oscillations, ripple oscillations, basket cells, axo-axonic cells, spike timing, endocannabinoids, cannabinoid receptor type 1, cell assemblies, pyramidal neurons
MeSH terms
Action Potentials, Animals, Biological Clocks, Cholecystokinin, gamma-Aminobutyric Acid, Gene Expression Regulation, Hippocampus, Male, Nerve Net, Neurons, Parvalbumins, Rats, Sprague-Dawley, Receptors, GABA, Rats

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