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mTOR signaling pathway genes in focal epilepsies

S Baulac1

  • 1Sorbonne Universités, UPMC Univ Paris 06, UM 75, Paris, France; INSERM, U1127, Paris, France; CNRS, UMR 7225, Paris, France; ICM (Institut du Cerveau et de la Moelle épinière), Paris, Paris, France; AP-HP Groupe hospitalier Pitié-Salpêtrière, Paris, France.

Progress in Brain Research
|June 22, 2016
PubMed

Insights

Genetic mutations in the GATOR1 complex (DEPDC5, NPRL2, NPRL3) are increasingly linked to focal epilepsies. These findings highlight the mechanistic target of rapamycin (mTOR) pathway

Area of Science:

  • Neurogenetics
  • Molecular Biology
  • Epileptology

Background:

  • Focal epilepsies are the most common type, often considered acquired but increasingly linked to genetic causes.
  • Previous research identified ion channel, neurotransmitter receptor, and synaptic protein genes.
  • Recent discoveries implicate the mechanistic target of rapamycin (mTOR) pathway in epilepsy pathogenesis.

Purpose of the Study:

  • To review the genetics and neurobiology of DEPDC5, NPRL2, and NPRL3.
  • To summarize the clinical and molecular spectrum of GATOR1 complex-related epilepsies.
  • To explore the role of the mTOR pathway in focal epilepsy syndromes.

Main Methods:

  • Review of existing genetic studies and neurobiological research.
  • Analysis of clinical data from patients with GATOR1 complex mutations.
  • Molecular characterization of genes involved in the mTOR pathway and GATOR1 complex.

Main Results:

  • Germline mutations in DEPDC5, NPRL2, and NPRL3 (GATOR1 complex components) are recognized causes of focal epilepsies.
  • These mutations are associated with a spectrum of focal epilepsy syndromes, with or without cortical dysplasia.
  • Somatic mutations in MTOR are linked to focal cortical dysplasia and related brain pathologies.

Conclusions:

  • The GATOR1 complex plays a critical role in repressing mTORC1 and is implicated in focal epilepsy development.
  • Understanding GATOR1-related epilepsies expands knowledge of genetic epilepsy syndromes.
  • Targeting the mTOR pathway may offer future therapeutic strategies for specific epilepsy types.
Keywords:
DEPDC5GATOR1GeneticsNPRL2NPRL3SUDEPmTOR

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