Pubblicazioni

Autori:

Johannesen, Katrine M; Liu, Yuanyuan; Koko, Mahmoud; Gjerulfsen, Cathrine E; Sonnenberg, Lukas; Schubert, Julian; Fenger, Christina D; Eltokhi, Ahmed; Rannap, Maert; Koch, Nils A; Lauxmann, Stephan; Krüger, Johanna; Kegele, Josua; Canafoglia, Laura; Franceschetti, Silvana; Mayer, Thomas; Rebstock, Johannes; Zacher, Pia; Ruf, Susanne; Alber, Michael; Sterbova, Katalin; Lassuthová, Petra; Vlckova, Marketa; Lemke, Johannes R; Platzer, Konrad; Krey, Ilona; Heine, Constanze; Wieczorek, Dagmar; Kroell-Seger, Judith; Lund, Caroline; Klein, Karl Martin; Au, P Y Billie; Rho, Jong M; Ho, Alice W; Masnada, Silvia; Veggiotti, Pierangelo; Giordano, Lucio; Accorsi, Patrizia; Hoei-Hansen, Christina E; Striano, Pasquale; Zara, Federico; Verhelst, Helene; Verhoeven, Judith S; Braakman, Hilde M H; van der Zwaag, Bert; Harder, Aster V E; Brilstra, Eva; Pendziwiat, Manuela; Lebon, Sebastian; Vaccarezza, Maria; Le, Ngoc Minh; Christensen, Jakob; Grønborg, Sabine; Scherer, Stephen W; Howe, Jennifer; Fazeli, Walid; Howell, Katherine B; Leventer, Richard; Stutterd, Chloe; Walsh, Sonja; Gerard, Marion; Gerard, Bénédicte; Matricardi, Sara; Bonardi, Claudia M; Sartori, Stefano; Berger, Andrea; Hoffman-Zacharska, Dorota; Mastrangelo, Massimo; Darra, Francesca; Vøllo, Arve; Motazacker, M Mahdi; Lakeman, Phillis; Nizon, Mathilde; Betzler, Cornelia; Altuzarra, Cecilia; Caume, Roseline; Roubertie, Agathe; Gélisse, Philippe; Marini, Carla; Guerrini, Renzo; Bilan, Frederic; Tibussek, Daniel; Koch-Hogrebe, Margarete; Perry, M Scott; Ichikawa, Shoji; Dadali, Elena; Sharkov, Artem; Mishina, Irina; Abramov, Mikhail; Kanivets, Ilya; Korostelev, Sergey; Kutsev, Sergey; Wain, Karen E; Eisenhauer, Nancy; Wagner, Monisa; Savatt, Juliann M; Müller-Schlüter, Karen; Bassan, Haim; Borovikov, Artem; Nassogne, Marie Cecile; Destrée, Anne; Schoonjans, An Sofie; Meuwissen, Marije; Buzatu, Marga; Jansen, Anna; Scalais, Emmanuel; Srivastava, Siddharth; Tan, Wen Hann; Olson, Heather E; Loddenkemper, Tobias; Poduri, Annapurna; Helbig, Katherine L; Helbig, Ingo; Fitzgerald, Mark P; Goldberg, Ethan M; Roser, Timo; Borggraefe, Ingo; Brünger, Tobias; May, Patrick; Lal, Dennis; Lederer, Damien; Rubboli, Guido; Heyne, Henrike O; Lesca, Gaetan; Hedrich, Ulrike B S; Benda, Jan; Gardella, Elena; Lerche, Holger; Møller, Rikke S

Titolo:

Genotype-phenotype correlations in SCN8A-related disorders reveal prognostic and therapeutic implications

Anno:

2022

Tipologia prodotto:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Lingua:

Inglese

Formato:

Elettronico

Referee:

Sì

Nome rivista:

Brain

ISSN Rivista:

0006-8950

N° Volume:

145

Numero o Fascicolo:

9

Intervallo pagine:

2991-3009

Parole chiave:

SCN8A; epilepsy; genetics; personalized medicine; Genetic Association Studies; Infant; Mutation; Prognosis; Seizures; Sodium Channel Blockers; Epilepsy, Generalized; Epileptic Syndromes; Intellectual Disability; NAV1.6 Voltage-Gated Sodium Channel

Breve descrizione dei contenuti:

We report detailed functional analyses and genotype-phenotype correlations in 392 individuals carrying disease-causing variants in SCN8A, encoding the voltage-gated Na+ channel Na(v)1.6, with the aim of describing clinical phenotypes related to functional effects. Six different clinical subgroups were identified: Group 1, benign familial infantile epilepsy (n = 15, normal cognition, treatable seizures); Group 2, intermediate epilepsy (n = 33, mild intellectual disability, partially pharmaco-responsive); Group 3, developmental and epileptic encephalopathy (n = 177, severe intellectual disability, majority pharmaco-resistant); Group 4, generalized epilepsy (n = 20, mild to moderate intellectual disability, frequently with absence seizures); Group 5, unclassifiable epilepsy (n = 127); and Group 6, neurodevelopmental disorder without epilepsy (n = 20, mild to moderate intellectual disability). Those in Groups 1-3 presented with focal or multifocal seizures (median age of onset: 4 months) and focal epileptiform discharges, whereas the onset of seizures in patients with generalized epilepsy was later (median: 42 months) with generalized epileptiform discharges. We performed functional studies expressing missense variants in ND7/23 neuroblastoma cells and primary neuronal cultures using recombinant tetrodotoxin-insensitive human Na(v)1.6 channels and whole-cell patch-clamping. Two variants causing developmental and epileptic encephalopathy showed a strong gain-of-function (hyperpolarizing shift of steady-state activation, strongly increased neuronal firing rate) and one variant causing benign familial infantile epilepsy or intermediate epilepsy showed a mild gain-of-function (defective fast inactivation, less increased firing). In contrast, all three variants causing generalized epilepsy induced a loss-of-function (reduced current amplitudes, depolarizing shift of steady-state activation, reduced neuronal firing). Functional effects were known for 170 individuals. All 136 individuals carrying a functionally tested gain-of-function variant had either focal (n = 97, Groups 1-3) or unclassifiable (n = 39) epilepsy, whereas 34 individuals with a loss-of-function variant had either generalized (n = 14), no (n = 11) or unclassifiable (n = 6) epilepsy; only three had developmental and epileptic encephalopathy. Computational modelling in the gain-of-function group revealed a significant correlation between the severity of the electrophysiological and clinical phenotypes. Gain-of-function variant carriers responded significantly better to sodium channel blockers than to other anti-seizure medications, and the same applied for all individuals in Groups 1-3. In conclusion, our data reveal clear genotype-phenotype correlations between age at seizure onset, type of epilepsy and gain- or loss-of-function effects of SCN8A variants. Generalized epilepsy with absence seizures is the main epilepsy phenotype of loss-of-function variant carriers and the extent of the electrophysiological dysfunction of the gain-of-function variants is a main determinant of the severity of the clinical phenotype in focal epilepsies. Our pharmacological data indicate that sodium channel blockers present a treatment option in SCN8A-related focal epilepsy with onset in the first year of life.

Pagina Web:

https://academic.oup.com/brain/article-abstract/145/9/2991/6357698?redirectedFrom=fulltext&login=true

Id prodotto:

130272

Handle IRIS:

11562/1079695

ultima modifica:

23 gennaio 2025

Citazione bibliografica:

Johannesen, Katrine M; Liu, Yuanyuan; Koko, Mahmoud; Gjerulfsen, Cathrine E; Sonnenberg, Lukas; Schubert, Julian; Fenger, Christina D; Eltokhi, Ahmed; Rannap, Maert; Koch, Nils A; Lauxmann, Stephan; Krüger, Johanna; Kegele, Josua; Canafoglia, Laura; Franceschetti, Silvana; Mayer, Thomas; Rebstock, Johannes; Zacher, Pia; Ruf, Susanne; Alber, Michael; Sterbova, Katalin; Lassuthová, Petra; Vlckova, Marketa; Lemke, Johannes R; Platzer, Konrad; Krey, Ilona; Heine, Constanze; Wieczorek, Dagmar; Kroell-Seger, Judith; Lund, Caroline; Klein, Karl Martin; Au, P Y Billie; Rho, Jong M; Ho, Alice W; Masnada, Silvia; Veggiotti, Pierangelo; Giordano, Lucio; Accorsi, Patrizia; Hoei-Hansen, Christina E; Striano, Pasquale; Zara, Federico; Verhelst, Helene; Verhoeven, Judith S; Braakman, Hilde M H; van der Zwaag, Bert; Harder, Aster V E; Brilstra, Eva; Pendziwiat, Manuela; Lebon, Sebastian; Vaccarezza, Maria; Le, Ngoc Minh; Christensen, Jakob; Grønborg, Sabine; Scherer, Stephen W; Howe, Jennifer; Fazeli, Walid; Howell, Katherine B; Leventer, Richard; Stutterd, Chloe; Walsh, Sonja; Gerard, Marion; Gerard, Bénédicte; Matricardi, Sara; Bonardi, Claudia M; Sartori, Stefano; Berger, Andrea; Hoffman-Zacharska, Dorota; Mastrangelo, Massimo; Darra, Francesca; Vøllo, Arve; Motazacker, M Mahdi; Lakeman, Phillis; Nizon, Mathilde; Betzler, Cornelia; Altuzarra, Cecilia; Caume, Roseline; Roubertie, Agathe; Gélisse, Philippe; Marini, Carla; Guerrini, Renzo; Bilan, Frederic; Tibussek, Daniel; Koch-Hogrebe, Margarete; Perry, M Scott; Ichikawa, Shoji; Dadali, Elena; Sharkov, Artem; Mishina, Irina; Abramov, Mikhail; Kanivets, Ilya; Korostelev, Sergey; Kutsev, Sergey; Wain, Karen E; Eisenhauer, Nancy; Wagner, Monisa; Savatt, Juliann M; Müller-Schlüter, Karen; Bassan, Haim; Borovikov, Artem; Nassogne, Marie Cecile; Destrée, Anne; Schoonjans, An Sofie; Meuwissen, Marije; Buzatu, Marga; Jansen, Anna; Scalais, Emmanuel; Srivastava, Siddharth; Tan, Wen Hann; Olson, Heather E; Loddenkemper, Tobias; Poduri, Annapurna; Helbig, Katherine L; Helbig, Ingo; Fitzgerald, Mark P; Goldberg, Ethan M; Roser, Timo; Borggraefe, Ingo; Brünger, Tobias; May, Patrick; Lal, Dennis; Lederer, Damien; Rubboli, Guido; Heyne, Henrike O; Lesca, Gaetan; Hedrich, Ulrike B S; Benda, Jan; Gardella, Elena; Lerche, Holger; Møller, Rikke S, Genotype-phenotype correlations in SCN8A-related disorders reveal prognostic and therapeutic implications «Brain» , vol. 145 , n. 9 , 2022 , pp. 2991-3009

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