Cited by 93Epilepsy research and treatmentIon channel regulation and functionNeuroscience and Neuropharmacology Research

Vasoactive intestinal peptide-expressing interneurons are impaired in a mouse model of Dravet syndrome

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Goff, Kevin M, Goldberg, Ethan M·2019·eLife

Abstract

Dravet Syndrome (DS) is a severe neurodevelopmental disorder caused by pathogenic loss of function variants in the gene SCN1A which encodes the voltage gated sodium (Na+) channel subunit Nav1.1. GABAergic interneurons expressing parvalbumin (PV-INs) and somatostatin (SST-INs) exhibit impaired excitability in DS (Scn1a+/-) mice. However, the function of a third major class of interneurons in DS – those expressing vasoactive intestinal peptide (VIP-IN) –is unknown. We recorded VIP-INs in brain slices from Scn1a+/-mice and wild-type littermate controls and found prominent impairment of irregular spiking (IS), but not continuous adapting (CA) VIP-INs, in Scn1a+/- mice. Application of the Nav1.1-specific toxin Hm1a rescued the observed deficits. The IS vs. CA firing pattern is determined by expression of KCNQ channels; IS VIP-INs switched to tonic firing with both pharmacologic blockade of M-current and muscarinic acetylcholine receptor activation. These results show that VIP-INs express Nav1.1 and are dysfunctional in DS, which may contribute to DS pathogenesis.

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Authors
Goff, K. M., & Goldberg, E. M.
Affiliations
  • University of Pennsylvania (US)
  • Children's Hospital of Philadelphia (US)
Corresponding author
Goldberg, Ethan M
Venue
eLife
Published
2019-07-08
Volume
8
ISSN
2050-084X (ISSN-L)
OpenAlex
W2958569275
Cited by
93
References
63
Citations by year
2026: 3 · 2025: 13 · 2024: 16 · 2023: 16 · 2022: 20 · 2021: 15 · 2020: 7 · 2019: 2
FWCI
8.74
Type
journal article
Language
en
Open access
Locations
  • eLife (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
  • National Institute of Neurological Disorders and Stroke (K08 NS097633, R01 NS110869)
  • Burroughs Wellcome Fund (Career Award for Medical Scientists)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Epilepsy research and treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
Dravet syndrome, vasoactive intestinal peptide interneurons, SCN1A, Nav1.1 sodium channel, KCNQ channels, M-current, muscarinic receptors, GABAergic interneurons, neuronal excitability
MeSH terms
Action Potentials, Animals, Brain, Epilepsies, Myoclonic, Interneurons, Mice, Inbred C57BL, Mice, Transgenic, Vasoactive Intestinal Peptide, Mice, Knockout, Mice, 129 Strain, NAV1.1 Voltage-Gated Sodium Channel

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