The landscape of epilepsy-related GATOR1 variants

Sara Baldassari, Fabienne Picard, Nienke E Verbeek, Marjan van Kempen, Eva H Brilstra, Gaetan Lesca, Valerio Conti, Renzo Guerrini, Francesca Bisulli, Laura Licchetta, Tommaso Pippucci, Paolo Tinuper, Edouard Hirsch, Anne de Saint Martin, Jamel Chelly, Gabrielle Rudolf, Mathilde Chipaux, Sarah Ferrand-Sorbets, Georg Dorfmüller, Sanjay SisodiyaSimona Balestrini, Natasha Schoeler, Laura Hernandez-Hernandez, S Krithika, Renske Oegema, Eveline Hagebeuk, Boudewijn Gunning, Charles Deckers, Bianca Berghuis, Ilse Wegner, Erik Niks, Floor Jansen, Kees Braun, Daniëlle de Jong, Guido Rubboli, Inga Talvik, Valentin Sander, Peter Uldall, Marie-Line Jacquemont, Caroline Nava, Eric Leguern, Sophie Julia, Antonio Gambardella, Giuseppe d'Orsi, Giovanni Crichiutti, Laurence Faivre, Veronique Darmency, Barbora Benova, Pavel Krsek, Arnaud Biraben, Anne-Sophie Lebre, Mélanie Jennesson, Shifteh Sattar, Cécile Marchal, Douglas R NordliJr, Kristin Lindstrom, Pasquale Striano, Lysa Boissé Lomax, Courtney Kiss, Fabrice Bartolomei, Anne Fabienne Lepine, An-Sofie Schoonjans, Katrien Stouffs, Anna Jansen, Eleni Panagiotakaki, Brigitte Ricard-Mousnier, Julien Thevenon, Julitta de Bellescize, Hélène Catenoix, Thomas Dorn, Martin Zenker, Karen Müller-Schlüter, Christian Brandt, Ilona Krey, Tilman Polster, Markus Wolff, Meral Balci, Kevin Rostasy, Guillaume Achaz, Pia Zacher, Thomas Becher, Thomas Cloppenborg, Christopher J Yuskaitis, Sarah Weckhuysen, Annapurna Poduri, Johannes R Lemke, Rikke S Møller, Stéphanie Baulac

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Abstrakt

Purpose: To define the phenotypic and mutational spectrum of epilepsies related to DEPDC5, NPRL2 and NPRL3 genes encoding the GATOR1 complex, a negative regulator of the mTORC1 pathway METHODS: We analyzed clinical and genetic data of 73 novel probands (familial and sporadic) with epilepsy-related variants in GATOR1-encoding genes and proposed new guidelines for clinical interpretation of GATOR1 variants.

Results: The GATOR1 seizure phenotype consisted mostly in focal seizures (e.g., hypermotor or frontal lobe seizures in 50%), with a mean age at onset of 4.4 years, often sleep-related and drug-resistant (54%), and associated with focal cortical dysplasia (20%). Infantile spasms were reported in 10% of the probands. Sudden unexpected death in epilepsy (SUDEP) occurred in 10% of the families. Novel classification framework of all 140 epilepsy-related GATOR1 variants (including the variants of this study) revealed that 68% are loss-of-function pathogenic, 14% are likely pathogenic, 15% are variants of uncertain significance and 3% are likely benign.

Conclusion: Our data emphasize the increasingly important role of GATOR1 genes in the pathogenesis of focal epilepsies (>180 probands to date). The GATOR1 phenotypic spectrum ranges from sporadic early-onset epilepsies with cognitive impairment comorbidities to familial focal epilepsies, and SUDEP.

OriginalsprogEngelsk
Sider (fra-til)398-408
TidsskriftGenetics in Medicine
Vol/bind21
Udgave nummer2
DOI
StatusUdgivet - feb. 2019

Fingeraftryk Udforsk hvilke forskningsemner 'The landscape of epilepsy-related GATOR1 variants' indeholder.

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