Cited by 241Neural dynamics and brain functionMemory and Neural MechanismsNeuroscience and Neuropharmacology Research

Parvalbumin interneurons of hippocampus tune population activity at theta frequency

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Amilhon, Bénédicte, Huh, Carey Y.L., Manseau, Frédéric, Ducharme, Guillaume, Nichol, Heather, Adamantidis, Antoine, Williams, Sylvain·2015·Neuron

Abstract

Hippocampal theta rhythm arises from a combination of recently described intrinsic theta oscillators and inputs from multiple brain areas. Interneurons expressing the markers parvalbumin (PV) and somatostatin (SOM) are leading candidates to participate in intrinsic rhythm generation and principal cell (PC) coordination in distal CA1 and subiculum. We tested their involvement by optogenetically activating and silencing PV or SOM interneurons in an intact hippocampus preparation that preserves intrinsic connections and oscillates spontaneously at theta frequencies. Despite evidence suggesting that SOM interneurons are crucial for theta, optogenetic manipulation of these interneurons modestly influenced theta rhythm. However, SOM interneurons were able to strongly modulate temporoammonic inputs. In contrast, activation of PV interneurons powerfully controlled PC network and rhythm generation optimally at 8 Hz, while continuously silencing them disrupted theta. Our results thus demonstrate a pivotal role of PV but not SOM interneurons for PC synchronization and the emergence of intrinsic hippocampal theta.

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Crossref · 10.1016/j.neuron.2015.05.027

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Authors
Amilhon, B., Huh, C. Y. L., Manseau, F., Ducharme, G., Nichol, H., Adamantidis, A., & Williams, S.
Affiliations
  • Douglas Mental Health University Institute (CA)
  • University of Bern (CH)
Corresponding author
  • Amilhon, Bénédicte
  • Williams, Sylvain
Venue
Neuron
Publisher
Elsevier BV
Published
2015-06
Volume
86
Issue
5
Pages
1277-1289
ISSN
0896-6273 (ISSN-L)
OpenAlex
W1544607115
Cited by
241
References
39
Citations by year
2026: 13 · 2025: 24 · 2024: 16 · 2023: 28 · 2022: 26 · 2021: 22 · 2020: 27 · 2019: 22 · 2018: 24 · 2017: 24 · 2016: 13 · 2015: 2
FWCI
12.62
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Massachusetts Institute of Technology
  • McGill University
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
parvalbumin interneurons, somatostatin interneurons, hippocampal theta rhythm, optogenetic manipulation, CA1, subiculum, neural population activity
MeSH terms
Action Potentials, Animals, Animals, Newborn, Hippocampus, Interneurons, Organ Culture Techniques, Parvalbumins, Theta Rhythm, Mice

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