Cited by 463Tuberous Sclerosis Complex ResearchPI3K/AKT/mTOR signaling in cancerEpilepsy research and treatment

A Mouse Model of Tuberous Sclerosis: Neuronal Loss of Tsc1 Causes Dysplastic and Ectopic Neurons, Reduced Myelination, Seizure Activity, and Limited Survival

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Meikle, Lynsey, Talos, Delia M., Onda, Hiroaki, Pollizzi, Kristen, Rotenberg, Alexander, Sahin, Mustafa, Jensen, Frances E., Kwiatkowski, David J.·2007·The Journal of Neuroscience

Abstract

Tuberous sclerosis (TSC) is a hamartoma syndrome caused by mutations in TSC1 or TSC2 in which cerebral cortical tubers and seizures are major clinical issues. We have engineered mice in which most cortical neurons lose Tsc1 expression during embryonic development. These Tsc1 mutant mice display several neurological abnormalities beginning at postnatal day 5 with subsequent failure to thrive and median survival of 35 d. The mice also display clinical and electrographic seizures both spontaneously and with physical stimulation, and some seizures end in a fatal tonic phase. Many cortical and hippocampal neurons are enlarged and/or dysplastic in the Tsc1 mutant mice, strongly express phospho-S6, and are ectopic in multiple sites in the cortex and hippocampus. There is a striking delay in myelination in the mutant mice, which appears to be caused by an inductive neuronal defect. This new TSC brain model replicates several features of human TSC brain lesions and implicates an important function of Tsc1/Tsc2 in neuronal development.

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Crossref · 10.1523/jneurosci.5540-06.2007

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  • TSC1-TSC2 loss affects neuronal development and properties.

    “In addition, whereas this work highlights astrocytes, we also observed transcriptomic changes in neurons, and considerable previous work has shown that TSC1–TSC2 loss affects neuronal development and properties11,13,35,55,56,57.”
  • mTOR hyperactivation accompanies epileptic activity across animal models of temporal lobe epilepsy, post-traumatic epilepsy, focal cortical dysplasia II, Dravet syndrome, autism spectrum disorder, and tuberous sclerosis complex.

    “Furthermore, mTOR hyperactivation accompanies epileptic activity across different seizure models including animal models of TLE, PTE, FCDII, Dravet syndrome, ASD, and TSC (Meikle et al., 2007; Zeng et al., 2008; Sha et al., 2012; Guo et al., 2013; Gheyara et al., 2014; Butler et al., 2015; Marsan and Baulac, 2018; Tai et al., 2020; Shao et al., 2022).”

    From Tauopathy and Epilepsy Comorbidities and Underlying Mechanisms (2022) · cites this paper as Meikle et al., 2007

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  1. Gomez M, Sampson J, Whittemore V (1999) The tuberous sclerosis com- plex. Oxford: Oxford UP.

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Authors
Meikle, L., Talos, D. M., Onda, H., Pollizzi, K., Rotenberg, A., Sahin, M., Jensen, F. E., & Kwiatkowski, D. J.
Affiliations
  • Brigham and Women's Hospital (US)
  • Boston Children's Hospital (US)
Corresponding author
Jensen, Frances E.
Venue
The Journal of Neuroscience
Published
2007-05-23
Volume
27
Issue
21
Pages
5546-5558
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2024191529
Cited by
462
References
68
Citations by year
2026: 9 · 2025: 17 · 2024: 14 · 2023: 14 · 2022: 20 · 2021: 27 · 2020: 23 · 2019: 22 · 2018: 29 · 2017: 23 · 2016: 25 · 2015: 37 · 2014: 31 · 2013: 35 · 2012: 50
FWCI
12.30
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Tuberous Sclerosis Alliance
  • National Institutes of Health (DP1OD003347, NS31718, NS24279)
  • National Institute of Neurological Disorders and Stroke (NS31718, R01NS031718, R56NS031718, P01NS024279, NS 24279)
Topics
  • Health Sciences › Medicine › Physiology › Tuberous Sclerosis Complex Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Health Sciences › Medicine › Psychiatry and Mental health › Epilepsy research and treatment
Keywords
tuberous sclerosis complex, TSC1, TSC2, mouse model, cortical tubers, neuronal loss, ectopic neurons, seizures, hippocampus, phospho-S6, neuronal development, survival
MeSH terms
Tuberous Sclerosis Complex 1 Protein, Animals, Demyelinating Diseases, Disease Models, Animal, Female, Male, Mice, Inbred CBA, Mice, Inbred C57BL, Mice, Transgenic, Neurons, Seizures, Tuberous Sclerosis, Survival Rate, Tumor Suppressor Proteins, Mice

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