Cited by 80Epilepsy research and treatmentTuberous Sclerosis Complex ResearchPI3K/AKT/mTOR signaling in cancer

GATOR1 complex: the common genetic actor in focal epilepsies

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Baldassari, Sara, Licchetta, Laura, Tinuper, Paolo, Bisulli, Francesca, Pippucci, Tommaso·2016·Journal of Medical Genetics

Abstract

The mammalian or mechanistic target of rapamycin (mTOR) signalling pathway has multiple roles in regulating physiology of the whole body and, particularly, the brain. Deregulation of mTOR signalling has been associated to various neurological conditions, including epilepsy. Mutations in genes encoding components of Gap Activity TOward Rags 1 (GATOR1) ( DEPDC5 , NPRL2 and NPRL3 ), a complex involved in the inhibition of the mTOR complex 1 (mTORC1), have been recently implicated in the pathogenesis of a wide spectrum of focal epilepsies (FEs), both lesional and non-lesional. The involvement of DEPDC5 , NPRL2 and NRPL3 in about 10% of FEs is in contrast to the concept that specific seizure semiology points to the main involvement of a distinct brain area. The hypothesised pathogenic mechanism underlying epilepsy is the loss of the inhibitory function of GATOR1 towards mTORC1. The identification of the correct therapeutic strategy in patients with FE is challenging, especially in those with refractory epilepsy and/or malformations of cortical development (MCDs). In such cases, surgical excision of the epileptogenic zone is a curative option, although the long-term outcome is still undefined. The GATOR1/mTOR signalling represents a promising therapeutic target in FEs due to mutations in mTOR pathway genes, as in tuberous sclerosis complex, another MCD-associated epilepsy caused by mTOR signalling hyperactivation.

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  • Mutations in the mammalian GATOR1 genes have been linked to focal epilepsies and familial cortical dysplasia, previously not considered to have an underlying genetic basis.

    “Mutations in the mammalian GATOR1 genes have been recently linked to focal epilepsies and familial cortical dysplasia, previously not considered to have an underlying genetic basis, supporting a multifaceted role for these proteins in multiple cellular processes (Baldassari et al., 2016; Ricos et al., 2016).”

    From Signal integration in the (m)TORC1 growth pathway (2018) · cites this paper as Baldassari et al., 2016

  • KICSTOR plays a role in the GATOR1-dependent repression of mTORC1 signaling.

    “Consistent with the notion that these abnormalities are associated with mTORC1 hyperactivation and GATOR1 inactivation (Baldassari et al., 2016; Baulac, 2016), KICSTOR clearly plays a role in the GATOR1-dependent repression of mTORC1 signaling.”

    From Signal integration in the (m)TORC1 growth pathway (2018) · cites this paper as Baldassari et al., 2016

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  1. Baldassari S, et al. J Med Genet 2016;53:503-510. doi:10.1136/jmedgenet-2016-103883
  2. Neurogenetics on November 21, 2024 by guest. Protected by copyright. http://jmg.bmj.com/ J Med Genet: first published as 10.1136/jmedgenet-2016-103883 on 19 May 2016. Downloaded from
  3. Baldassari S, et al. J Med Genet 2016;53:503-510. doi:10.1136/jmedgenet-2016-103883 509 · DOI
  4. Neurogenetics on November 21, 2024 by guest. Protected by copyright. http://jmg.bmj.com/ J Med Genet: first published as 10.1136/jmedgenet-2016-103883 on 19 May 2016. Downloaded from
  5. Baldassari S, et al. J Med Genet 2016;53:503-510. doi:10.1136/jmedgenet-2016-103883
  6. Neurogenetics on November 21, 2024 by guest. Protected by copyright. http://jmg.bmj.com/ J Med Genet: first published as 10.1136/jmedgenet-2016-103883 on 19 May 2016. Downloaded

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Authors
Baldassari, S., Licchetta, L., Tinuper, P., Bisulli, F., & Pippucci, T.
Affiliations
  • IRCCS Azienda Ospedliero-Universitaria di Bologna Policlinico di Sant'Orsola (IT)
  • Istituto delle Scienze Neurologiche di Bologna (IT)
  • Azienda USL di Bologna (IT)
Corresponding author
Bisulli, Francesca
Venue
Journal of Medical Genetics
Publisher
BMJ
Published
2016-05-19
Volume
53
Issue
8
Pages
503-510
ISSN
  • 0022-2593 (ISSN-L)
  • 1468-6244
OpenAlex
W2400873831
Cited by
80
References
72
Citations by year
2026: 8 · 2025: 7 · 2024: 6 · 2023: 13 · 2022: 10 · 2021: 13 · 2020: 4 · 2019: 6 · 2018: 4 · 2017: 9
FWCI
0.90
Type
journal article
Language
en
Open access
Locations
  • Journal of Medical Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
Fondazione Telethon (GGP13200)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Epilepsy research and treatment
  • Health Sciences › Medicine › Physiology › Tuberous Sclerosis Complex Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
Keywords
GATOR1 complex, focal epilepsy, mTOR signaling, mTORC1 inhibition, DEPDC5, NPRL2, NPRL3, genetic epilepsy, malformations of cortical development, drug-resistant epilepsy, tuberous sclerosis complex, epilepsy surgery, therapeutic target
MeSH terms
Mechanistic Target of Rapamycin Complex 1, Animals, Brain, Epilepsies, Partial, Humans, Mutation, Signal Transduction, Multiprotein Complexes, TOR Serine-Threonine Kinases

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