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Cited by 282

The DOI matches its Crossref record; 7 of the 7 references it cites were found in a registry or an index.

Sudden unexpected death in a mouse model of Dravet syndrome

Open access
Kalume, Franck, Westenbroek, Ruth E., Cheah, Christine S., Yu, Frank H., Oakley, John C., Scheuer, Todd, Catterall, William A.·2013·Journal of Clinical Investigation

Abstract

Sudden unexpected death in epilepsy (SUDEP) is the most common cause of death in intractable epilepsies, but physiological mechanisms that lead to SUDEP are unknown. Dravet syndrome (DS) is an infantile-onset intractable epilepsy caused by heterozygous loss-of-function mutations in the SCN1A gene, which encodes brain type-I voltage-gated sodium channel NaV1.1. We studied the mechanism of premature death in Scn1a heterozygous KO mice and conditional brain- and cardiac-specific KOs. Video monitoring demonstrated that SUDEP occurred immediately following generalized tonic-clonic seizures. A history of multiple seizures was a strong risk factor for SUDEP. Combined video-electroencephalography-electrocardiography revealed suppressed interictal resting heart-rate variability and episodes of ictal bradycardia associated with the tonic phases of generalized tonic-clonic seizures. Prolonged atropine-sensitive ictal bradycardia preceded SUDEP. Similar studies in conditional KO mice demonstrated that brain, but not cardiac, KO of Scn1a produced cardiac and SUDEP phenotypes similar to those found in DS mice. Atropine or N-methyl scopolamine treatment reduced the incidence of ictal bradycardia and SUDEP in DS mice. These findings suggest that SUDEP is caused by apparent parasympathetic hyperactivity immediately following tonic-clonic seizures in DS mice, which leads to lethal bradycardia and electrical dysfunction of the ventricle. These results have important implications for prevention of SUDEP in DS patients.

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Metadata

Authors
Kalume, F., Westenbroek, R. E., Cheah, C. S., Yu, F. H., Oakley, J. C., Scheuer, T., & Catterall, W. A.
Venue
Journal of Clinical Investigation
Published
2013-03-25
Volume
123
Issue
4
Pages
1798-1808
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2167285873
Cited by
282
References
7
FWCI
15.95
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Sudden unexpected death in a mouse model of Dravet syndrome. https://app.cochat.ai/papers/10.1172/jci66220
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Kalume, F., Westenbroek, R. E., Cheah, C. S., Yu, F. H., Oakley, J. C., Scheuer, T., & Catterall, W. A. (2013). Sudden unexpected death in a mouse model of Dravet syndrome. Journal of Clinical Investigation. https://doi.org/10.1172/jci66220

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.