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2. Severe Congenital Heart Defects and Cerebral Palsy

Author

Garne, Ester, Goldsmith, Shona, Barisic, Ingeborg, Braz, Paula, Dakovic, Ivana, Gibson, Catherine, Hansen, Michele, Hoei-Hansen, Christina E., Hollung, Sandra Julsen, Klungsøyr, Kari, Smithers-Sheedy, Hayley, Virella, Daniel, Badawi, Nadia, Watson, Linda, and McIntyre, Sarah

Published
2023
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6. Effectiveness and safety of everolimus treatment in patients with tuberous sclerosis complex in real-world clinical practice

Author

Cockerell, Ine Tracey, primary, Christensen, Jakob, additional, Hoei-Hansen, Christina E, additional, Holst, Lotte, additional, Frederiksen, Mikkel Grenaa, additional, Issa-Epe, Aart Imran, additional, Nedregaard, Bård, additional, Solhoff, Ragnar, additional, Heimdal, Ketil, additional, Landmark, Cecilie Johannessen, additional, Lund, Caroline, additional, and Nærland, Terje, additional

Published
2023
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11. Children in Denmark with cerebral palsy rarely complete elementary school

Author

Pedersen, Signe V., Wiingreen, Rikke, Hansen, Bo M., Greisen, Gorm, Larsen, Mads L., Hoei-Hansen, Christina E., Pedersen, Signe V., Wiingreen, Rikke, Hansen, Bo M., Greisen, Gorm, Larsen, Mads L., and Hoei-Hansen, Christina E.

Abstract

Aim To investigate how children with cerebral palsy (CP) perform in the Danish school system and which factors are associated with school performance. Method This was a population-based cohort study including 463 126 children born from 1997 to 2003. Data were extracted from seven national registries. The study encompassed 818 children with CP (483 [59.0%] males, 335 [41.0%] females) and 417 731 without CP (214 535 [51.4%] males, 203 196 [48.6%] females). We evaluated two primary outcomes: not completing 10 years of elementary school, defined as attending fewer than eight final mandatory exams; and grade point averages (GPAs). Mann–Whitney U tests were used to analyse differences in GPAs and logistic regressions were used to calculate odds ratios (ORs). Results Among children with and without CP, 62.6% and 12.4% did not complete elementary school respectively (OR = 11.85 [10.28–13.66]). Additionally, children with CP who attended all final exams achieved lower overall GPAs than children without CP (6.6 vs 7.3, p = 0.001). In children with CP, comorbidities, maternal education, severity of motor impairments, and intellectual deficits were associated with increased odds of not completing elementary school. Notably, one-third of children with CP with apparent normal intelligence did not complete school, despite special educational measures. Interpretation Danish children with CP rarely complete elementary school despite initiatives for a more supportive educational system. The complexity of individual needs in children with CP may be challenging for an inclusive school environment., Aim: To investigate how children with cerebral palsy (CP) perform in the Danish school system and which factors are associated with school performance. Method: This was a population-based cohort study including 463 126 children born from 1997 to 2003. Data were extracted from seven national registries. The study encompassed 818 children with CP (483 [59.0%] males, 335 [41.0%] females) and 417 731 without CP (214 535 [51.4%] males, 203 196 [48.6%] females). We evaluated two primary outcomes: not completing 10 years of elementary school, defined as attending fewer than eight final mandatory exams; and grade point averages (GPAs). Mann–Whitney U tests were used to analyse differences in GPAs and logistic regressions were used to calculate odds ratios (ORs). Results: Among children with and without CP, 62.6% and 12.4% did not complete elementary school respectively (OR = 11.85 [10.28–13.66]). Additionally, children with CP who attended all final exams achieved lower overall GPAs than children without CP (6.6 vs 7.3, p = 0.001). In children with CP, comorbidities, maternal education, severity of motor impairments, and intellectual deficits were associated with increased odds of not completing elementary school. Notably, one-third of children with CP with apparent normal intelligence did not complete school, despite special educational measures. Interpretation: Danish children with CP rarely complete elementary school despite initiatives for a more supportive educational system. The complexity of individual needs in children with CP may be challenging for an inclusive school environment.

Published
2023

12. ATP6V0C variants impair V-ATPase function causing a neurodevelopmental disorder often associated with epilepsy

Author

Mattison, Kari A, Tossing, Gilles, Mulroe, Fred, Simmons, Callum, Butler, Kameryn M, Schreiber, Alison, Alsadah, Adnan, Neilson, Derek E, Naess, Karin, Wedell, Anna, Wredenberg, Anna, Sorlin, Arthur, McCann, Emma, Burghel, George J, Menendez, Beatriz, Hoganson, George E, Botto, Lorenzo D, Filloux, Francis M, Aledo-Serrano, Angel, Gil-Nagel, Antonio, Tatton-Brown, Katrina, Verbeek, Nienke E, van der Zwaag, Bert, Aleck, Kyrieckos A, Fazenbaker, Andrew C, Balciuniene, Jorune, Dubbs, Holly A, Marsh, Eric D, Garber, Kathryn, Ek, Jakob, Duno, Morten, Hoei-Hansen, Christina E, Deardorff, Matthew A, Raca, Gordana, Quindipan, Catherine, Van Hirtum-Das, Michele, Breckpot, Jeroen, Hammer, Trine Bjorg, Moller, Rikke S, Whitney, Andrea, Douglas, Andrew GL, Kharbanda, Mira, Brunetti-Pierri, Nicola, Morleo, Manuela, Nigro, Vincenzo, May, Halie J, Tao, James X, Argilli, Emanuela, Sherr, Elliot H, Dobyns, William B, Baines, Richard A, Warwicker, Jim, Parker, J Alex, Banka, Siddharth, Campeau, Philippe M, and Escayg, Andrew

Subjects
neurodevelopmental disorders, ATP6V0C, VMA3, V-ATPase, Neurology (clinical), epilepsy genetics
Abstract

The vacuolar H+-ATPase is an enzymatic complex that functions in an ATP-dependent manner to pump protons across membranes and acidify organelles, thereby creating the proton/pH gradient required for membrane trafficking by several different types of transporters. We describe heterozygous point variants in ATP6V0C, encoding the c-subunit in the membrane bound integral domain of the vacuolar H+-ATPase, in 27 patients with neurodevelopmental abnormalities with or without epilepsy. Corpus callosum hypoplasia and cardiac abnormalities were also present in some patients. In silico modelling suggested that the patient variants interfere with the interactions between the ATP6V0C and ATP6V0A subunits during ATP hydrolysis. Consistent with decreased vacuolar H+-ATPase activity, functional analyses conducted in Saccharomyces cerevisiae revealed reduced LysoSensor fluorescence and reduced growth in media containing varying concentrations of CaCl2. Knockdown of ATP6V0C in Drosophila resulted in increased duration of seizure-like behaviour, and the expression of selected patient variants in Caenorhabditis elegans led to reduced growth, motor dysfunction and reduced lifespan. In summary, this study establishes ATP6V0C as an important disease gene, describes the clinical features of the associated neurodevelopmental disorder and provides insight into disease mechanisms. ispartof: BRAIN vol:146 issue:4 ispartof: location:England status: Published online

Published
2023

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

Author

Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center], BMBF, Treat-ION, 01GM1907 [sponsor], 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, Billie Au, P. Y., 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., van der Zwaag, Bert, Harder, Aster V. E., Brilstra, Eva, Pendziwiat, Manuela, Lebon, Sebastian, Vaccarezza, Maria, Minh Le, Ngoc, 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., Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center], BMBF, Treat-ION, 01GM1907 [sponsor], 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, Billie Au, P. Y., 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., van der Zwaag, Bert, Harder, Aster V. E., Brilstra, Eva, Pendziwiat, Manuela, Lebon, Sebastian, Vaccarezza, Maria, Minh Le, Ngoc, 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, and Møller, Rikke S.

Abstract

We report detailed functional analyses and genotype-phenotype correlations in 392 individuals carrying disease-causing variants in SCN8A, encoding the voltage-gated Na+ channel NaV1.6, with the aim of describing clinical phenotypes related to functional effects. Six different clinical subgroups could be identified: 1) Benign familial infantile epilepsy (BFIE) (n = 15, normal cognition, treatable seizures), 2) intermediate epilepsy (n = 33, mild ID, partially pharmaco-responsive), 3) developmental and epileptic encephalopathy (DEE, n = 177, severe ID, majority pharmaco-resistant), 4) generalized epilepsy (n = 20, mild to moderate ID, frequently with absence seizures), 5) unclassifiable epilepsy (n = 127), and 6) neurodevelopmental disorder without epilepsy (n = 20, mild to moderate ID). Groups 1–3 presented with focal or multifocal seizures (median age of onset: four months) and focal epileptiform discharges, whereas the onset of seizures in group 4 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 NaV1.6 channels and whole-cell patch-clamping. Two variants causing DEE showed a strong gain-of-function (GOF, hyperpolarising shift of steady-state activation, strongly increased neuronal firing rate), and one variant causing BFIE or intermediate epilepsy showed a mild GOF (defective fast inactivation, less increased firing). In contrast, all three variants causing generalized epilepsy induced a loss-of-function (LOF, reduced current amplitudes, depolarising shift of steady-state activation, reduced neuronal firing). Including previous studies, functional effects were known for 170 individuals. All 136 individuals carrying a functionally tested GOF variant had either focal (97, groups 1–3), or unclassifiable epilepsy (39), whereas 34 with a LOF variant had either generalized (14), no

Published
2022

14. Basal og avanceret behandling af børn og voksne med epilepsi

Author

Hoei-Hansen, Christina E., Tinggaard, Jeanette, Kløvgaard, Marius, Sabers, Anne, Hoei-Hansen, Christina E., Tinggaard, Jeanette, Kløvgaard, Marius, and Sabers, Anne

Abstract

This review finds that, in children and adults with epilepsy, there are several treatment options. Multiple antiseizure medications are available and in case of drug-resistant epilepsy, a non-pharmacological approach is recommended, including epilepsy surgery, vagus nerve stimulation, or ketogenic diet treatment. The aim of the treatment is to avoid further seizures, but also to avoid negative cognitive, psychological, and social consequences of epilepsy.

Published
2022

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

Author

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., 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, and Møller, Rikke S.

Abstract

We report detailed functional analyses and genotype-phenotype correlations in 392 individuals carrying disease-causing variants in SCN8A, encoding the voltage-gated Na+ channel Nav1.6, 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 Nav1.6 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 i

Published
2022

16. Declining prevalence of cerebral palsy in children born at term in Denmark

Author

Larsen, Mads L, Rackauskaite, Gija, Greisen, Gorm, Laursen, Bjarne, Uldall, Peter, Krebs, Lone, Hoei-Hansen, Christina E, Larsen, Mads L, Rackauskaite, Gija, Greisen, Gorm, Laursen, Bjarne, Uldall, Peter, Krebs, Lone, and Hoei-Hansen, Christina E

Abstract

AIM: To investigate reasons for the declining prevalence of cerebral palsy (CP) in children born at term in Denmark by evaluating obstetric and neonatal factors associated with CP, and their changes over time.METHOD: In this cohort study, we included 987 495 children (504 600 [51.1%] males and 482 895 [48.9%] females) born after 37 completed gestational weeks during birth years 1997 to 2013. Risk ratios of CP for each factor were calculated with log-binominal regression analyses. Significant factors were evaluated concerning their development in prevalence over time.RESULTS: In the antenatal period, there were significant associations with an increased risk of CP and high maternal body mass index (BMI), smoking during pregnancy, nulliparity, male sex, gestational age, and low birthweight. In the study period, fewer females smoked during pregnancy and fewer children were born post-term, dropping from 22.6% to 11.4% and 9.4% to 2.5% respectively. Conversely, the proportion of females with high BMI increased. Most significant risk factors were found in the neonatal period, with an increase in children with diagnosed birth defects and children admitted to neonatal care.INTERPRETATION: Reasons for the declining prevalence of CP appear to be multifactorial and likely include the decline in maternal smoking and children born post-term along with centralization and advances in neonatal treatment.

Published
2022

17. Using both electromyography and movement disorder assessment improved the classification of children with dyskinetic cerebral palsy

Author

Lorentzen, Jakob, Born, Alfred P., Svane, Christian, Forman, Christian, Laursen, Bjarne, Langkilde, Annika R., Uldall, Peter, Hoei-Hansen, Christina E., Lorentzen, Jakob, Born, Alfred P., Svane, Christian, Forman, Christian, Laursen, Bjarne, Langkilde, Annika R., Uldall, Peter, and Hoei-Hansen, Christina E.

Abstract

Aim: Children with dyskinetic cerebral palsy (CP) are often severely affected and effective treatment is difficult, due to different underlying disease mechanisms. Comprehensive systematic movement disorder evaluations were carried out on patients with this disorder. Methods: Patients born from 1995 to 2007 were identified from the Danish Cerebral Palsy Register and referrals to the neuropaediatric centre, Rigshospitalet, Copenhagen. They were classified by gross motor function, manual functional ability, communication ability, dystonia and spasticity. Electromyography was carried out on the upper and lower limbs. Magnetic resonance imaging scans were revised, and aetiological searches for underlying genetic disorders were performed. Results: We investigated 25 patients with dyskinetic CP at a mean age of 11.7 years. Dystonia, spasticity and rigidity were found in the upper limbs of 21, four and six children, respectively, and in the lower limbs of 18, 18 and three children. The mean total Burke-Fahn-Marsden score for dystonia was 45.02, and the mean Disability Impairment Scale level was 38% for dystonia and 13% for choreoathetosis. Sustained electromyography activity was observed in 20/25 children. Stretching increased electromyography activity more in children with spasticity. There were 10 re-classifications. Conclusion: The children had heterogenic characteristics, and 40% were reclassified after systematic movement disorder evaluation.

Published
2022

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

Author

Genetica Sectie Genoomdiagnostiek, Child Health, Genetica Klinische Genetica, Brain, 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, Billie Au, P Y, 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, van der Zwaag, Bert, Harder, Aster V E, Brilstra, Eva, Pendziwiat, Manuela, Lebon, Sebastian, Vaccarezza, Maria, Minh Le, Ngoc, 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, Genetica Sectie Genoomdiagnostiek, Child Health, Genetica Klinische Genetica, Brain, 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, Billie Au, P Y, 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, van der Zwaag, Bert, Harder, Aster V E, Brilstra, Eva, Pendziwiat, Manuela, Lebon, Sebastian, Vaccarezza, Maria, Minh Le, Ngoc, 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, and Møller, Rikke S

Published
2022

20. Basic and advanced treatment of children and adults with epilepsy

Author

Hoei-Hansen, Christina E., Tinggaard, Jeanette, Kløvgaard, Marius, and Sabers, Anne

Abstract

This review finds that, in children and adults with epilepsy, there are several treatment options. Multiple antiseizure medications are available and in case of drug-resistant epilepsy, a non-pharmacological approach is recommended, including epilepsy surgery, vagus nerve stimulation, or ketogenic diet treatment. The aim of the treatment is to avoid further seizures, but also to avoid negative cognitive, psychological, and social consequences of epilepsy.

Published
2022

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

Author

Johannesen, Katrine M., Liu, Yuanyuan, Gjerulfsen, Cathrine E., Koko, Mahmoud, 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., 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, S.Verhoeven, Judith, van der Zwaag, Bert, Harder, Aster V. E., Brilstra, Eva, Pendziwiat, Manuela, Lebon, Sebastian, Vaccarezza, Maria, Le, Ngoc Minh, Christensen, Jakob, Schmidt-Petersen, Mette U., 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, Lesca, Gaetan, Hedrich, Ulrike B. S., Benda, Jan, Gardella, Elena, Lerche, Holger, Møller, Rikke S., and Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center]

Subjects
Genetics & genetic processes [F10] [Life sciences], Génétique & processus génétiques [F10] [Sciences du vivant]
Abstract

We report detailed functional analyses and genotype-phenotype correlations in 433 individuals carrying disease-causing variants in SCN8A, encoding the voltage-gated Na+ channel NaV1.6. Five different clinical subgroups could be identified: 1) Benign familial infantile epilepsy (BFIE) (n=17, normal cognition, treatable seizures), 2) intermediate epilepsy (n=36, mild ID, partially pharmacoresponsive), 3) developmental and epileptic encephalopathy (DEE, n=191, severe ID, majority pharmacoresistant), 4) generalized epilepsy (n=21, mild to moderate ID, frequently with absence seizures), and 5) affected individuals without epilepsy (n=25, mild to moderate ID). Groups 1-3 presented with early-onset (median: four months) focal or multifocal seizures and epileptic discharges, whereas the onset of seizures in group 4 was later (median: 39 months) with generalized epileptic discharges. The epilepsy was not classifiable in 143 individuals. We performed functional studies expressing missense variants in ND7/23 neuroblastoma cells and primary neuronal cultures using recombinant tetrodotoxin insensitive human NaV1.6 channels and whole-cell patch clamping. Two variants causing DEE showed a strong gain-of-function (GOF, hyperpolarising shift of steady-state activation, strongly increased neuronal firing rate), and one variant causing BFIE or intermediate epilepsy showed a mild GOF (defective fast inactivation, less increased firing). In contrast, all three variants causing generalized epilepsy induced a loss-of-function (LOF, reduced current amplitudes, depolarising shift of steady-state activation, reduced neuronal firing). Including previous studies, functional effects were known for 165 individuals. All 133 individuals carrying GOF variants had either focal (76, groups 1-3), or unclassifiable epilepsy (37), whereas 32 with LOF variants had either generalized (14), no (11) or unclassifiable (5) epilepsy; only two had DEE. Computational modeling in the GOF group revealed a significant correlation between the severity of the electrophysiological and clinical phenotypes. GOF variant carriers responded significantly better to sodium channel blockers (SCBs) than to other anti-seizure medications, and the same applied for all individuals of 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 LOF variant carriers and the extent of the electrophysiological dysfunction of the GOF variants is a main determinant of the severity of the clinical phenotype in focal epilepsies. Our pharmacological data indicate that SCBs present a therapeutic treatment option in early onset SCN8A-related focal epilepsy.

Published
2021

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

Author

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

Published
2021
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27. Genotype-phenotype correlations in SCN8A-related disorders reveal prognostic and therapeutic implications

Author

Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center], Johannesen, Katrine M., Liu, Yuanyuan, Gjerulfsen, Cathrine E., Koko, Mahmoud, 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., 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, S.Verhoeven, Judith, van der Zwaag, Bert, Harder, Aster V. E., Brilstra, Eva, Pendziwiat, Manuela, Lebon, Sebastian, Vaccarezza, Maria, Le, Ngoc Minh, Christensen, Jakob, Schmidt-Petersen, Mette U., 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, Lesca, Gaetan, Hedrich, Ulrike B. S., Benda, Jan, Gardella, Elena, Lerche, Holger, Møller, Rikke S., Luxembourg Centre for Systems Biomedicine (LCSB): Bioinformatics Core (R. Schneider Group) [research center], Johannesen, Katrine M., Liu, Yuanyuan, Gjerulfsen, Cathrine E., Koko, Mahmoud, 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., 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, S.Verhoeven, Judith, van der Zwaag, Bert, Harder, Aster V. E., Brilstra, Eva, Pendziwiat, Manuela, Lebon, Sebastian, Vaccarezza, Maria, Le, Ngoc Minh, Christensen, Jakob, Schmidt-Petersen, Mette U., 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, Lesca, Gaetan, Hedrich, Ulrike B. S., Benda, Jan, Gardella, Elena, Lerche, Holger, and Møller, Rikke S.

Abstract

We report detailed functional analyses and genotype-phenotype correlations in 433 individuals carrying disease-causing variants in SCN8A, encoding the voltage-gated Na+ channel NaV1.6. Five different clinical subgroups could be identified: 1) Benign familial infantile epilepsy (BFIE) (n=17, normal cognition, treatable seizures), 2) intermediate epilepsy (n=36, mild ID, partially pharmacoresponsive), 3) developmental and epileptic encephalopathy (DEE, n=191, severe ID, majority pharmacoresistant), 4) generalized epilepsy (n=21, mild to moderate ID, frequently with absence seizures), and 5) affected individuals without epilepsy (n=25, mild to moderate ID). Groups 1-3 presented with early-onset (median: four months) focal or multifocal seizures and epileptic discharges, whereas the onset of seizures in group 4 was later (median: 39 months) with generalized epileptic discharges. The epilepsy was not classifiable in 143 individuals. We performed functional studies expressing missense variants in ND7/23 neuroblastoma cells and primary neuronal cultures using recombinant tetrodotoxin insensitive human NaV1.6 channels and whole-cell patch clamping. Two variants causing DEE showed a strong gain-of-function (GOF, hyperpolarising shift of steady-state activation, strongly increased neuronal firing rate), and one variant causing BFIE or intermediate epilepsy showed a mild GOF (defective fast inactivation, less increased firing). In contrast, all three variants causing generalized epilepsy induced a loss-of-function (LOF, reduced current amplitudes, depolarising shift of steady-state activation, reduced neuronal firing). Including previous studies, functional effects were known for 165 individuals. All 133 individuals carrying GOF variants had either focal (76, groups 1-3), or unclassifiable epilepsy (37), whereas 32 with LOF variants had either generalized (14), no (11) or unclassifiable (5) epilepsy; only two had DEE. Computational modeling in the GOF group revealed a signific

Published
2021

45. Neuronal mechanisms of mutations in SCN8A causing epilepsy or intellectual disability

Author

Liu, Yuanyuan, primary, Schubert, Julian, additional, Sonnenberg, Lukas, additional, Helbig, Katherine L, additional, Hoei-Hansen, Christina E, additional, Koko, Mahmoud, additional, Rannap, Maert, additional, Lauxmann, Stephan, additional, Huq, Mahbubul, additional, Schneider, Michael C, additional, Johannesen, Katrine M, additional, Kurlemann, Gerhard, additional, Gardella, Elena, additional, Becker, Felicitas, additional, Weber, Yvonne G, additional, Benda, Jan, additional, Møller, Rikke S, additional, and Lerche, Holger, additional

Published
2019
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46. Ovarian dysgerminomas are characterised by frequent KIT mutations and abundant expression of pluripotency markers

Author

Kærn Janne, Abeler Vera M, Kraggerud Sigrid M, Hoei-Hansen Christina E, Rajpert-De Meyts Ewa, and Lothe Ragnhild A

Subjects
Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282
Abstract

Abstract Background Ovarian germ cell tumours (OGCTs) typically arise in young females and their pathogenesis remains poorly understood. We investigated the origin of malignant OGCTs and underlying molecular events in the development of the various histological subtypes of this neoplasia. Results We examined in situ expression of stem cell-related (NANOG, OCT-3/4, KIT, AP-2γ) and germ cell-specific proteins (MAGE-A4, NY-ESO-1, TSPY) using a tissue microarray consisting of 60 OGCT tissue samples and eight ovarian small cell carcinoma samples. Developmental pattern of expression of NANOG, TSPY, NY-ESO-1 and MAGE-A4 was determined in foetal ovaries (gestational weeks 13–40). The molecular genetic part of our study included search for the presence of Y-chromosome material by fluorescence in situ hybridisation (FISH), and mutational analysis of the KIT oncogene (exon 17, codon 816), which is often mutated in testicular GCTs, in a subset of tumour DNA samples. We detected a high expression of transcription factors related to the embryonic stem cell-like pluripotency and undifferentiated state in OGCTs, but not in small cell carcinomas, supporting the view that the latter do not arise from a germ cell progenitor. Bilateral OGCTs expressed more stem cell markers than unilateral cases. However, KIT was mutated in 5/13 unilateral dysgerminomas, whereas all bilateral dysgerminomas (n = 4) and all other histological types (n = 22) showed a wild type sequence. Furthermore, tissue from five phenotypic female patients harbouring combined dysgerminoma/gonadoblastoma expressed TSPY and contained Y-chromosome material as confirmed by FISH. Conclusion This study provides new data supporting two distinct but overlapping pathways in OGCT development; one involving spontaneous KIT mutation(s) leading to increased survival and proliferation of undifferentiated oogonia, the other related to presence of Y chromosome material and ensuing gonadal dysgenesis in phenotypic females.

Published
2007
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47. Unexpected marked seizure improvement in paediatric epilepsy surgery candidates

Author

Hoei-Hansen, Christina E, Mathiasen, René, Uldall, Peter, Hoei-Hansen, Christina E, Mathiasen, René, and Uldall, Peter

Abstract

PURPOSE: Epilepsy surgery is performed based on the assumption that medical refractory epilepsy will continue. Rarely seizure freedom occurs before surgery is performed, while the patient is being evaluated as an epilepsy surgery candidate. The aim of this study was to describe the number of children withdrawn from an epilepsy surgery programme due to unexpected seizure improvement.METHODS: We retrospectively studied 173 children under 18 years with medical refractory epilepsy referred for epilepsy surgery between 1996 and 2010. Medical records were reviewed in 2012 and 2015.RESULTS: At the first evaluation point in 2012, 13 patients were withdrawn from the epilepsy surgery programme due to unexpected marked improvement. In 2015, 6 of them were still seizure free. They had unexpected seizure freedom due to change in AED treatment (n=3) or after a febrile episode (n=3). The mean number of years they had had seizures was 3.4 years (range 0.6-6.2 years) and the number of seizures at inclusion was 209 per month (range 6-750 per month). The duration of follow-up was 6.6 years after inclusion into the epilepsy surgery programme (range 4.0-13.0 years). The aetiology of the epilepsy for these patients was heterotopia (n=1), focal cortical dysplasia (n=3), infarction (n=1) and unknown, with normal MRI (n=1). They all had an IQ in the normal range. Two of the remaining 7 children were operated later.CONCLUSION: Unexpected seizure control may occur during epilepsy surgery evaluation.

Published
2017

48. Danish experience with paediatric epilepsy surgery

Author

Underbjerg, Ebba von Celsing, Hoei-Hansen, Christina E, Madsen, Flemming Find, Madsen, Camilla Gøbel, Høgenhaven, Hans, and Uldall, Peter

Abstract

INTRODUCTION: Epilepsy surgery is increasingly used to treat children with medically intractable epilepsy. This study investigates the aetiology and seizure outcome in Danish children operated between 1996 and 2010.METHODS: Retrospectively collected data on structural magnetic resonance imaging (MRI) diagnoses, surgical procedures and seizure outcomes classified according to the Engel Classification were used. Changes over time grouped as 1996-2000, 2001-2005 and 2006-2010 were analysed.RESULTS: A total of 95 children underwent epilepsy surgery. Sixty-three operations were performed in Denmark and 50 abroad. In all, 14 children needed reoperation. The median follow-up period was four years. At the latest follow-up, Engel class I (indicating no disabling seizures) was found in 67% of the patients. Cortical dysplasia, mesial temporal sclerosis and tumour were the most common MRI findings. The percentage of tumours operated decreased over time, and frontal lobe resections increased. In the 2006-2010 period, resections with normal MRI were performed, resulting in a less favourable Engel outcome. Persistent, unexpected complications were seen in three of 113 operations.CONCLUSIONS: The majority of children who undergo epilepsy surgery have a good, worthwhile seizure outcome. The seizure outcome for Danish children corresponds to that of other epilepsy surgery centres. The clinical criteria for selection of patients changed over time.FUNDING: none.TRIAL REGISTRATION: The Danish Data Protection Agency approved the project with record number: 2013-41-2459.

Published
2015

49. Unexpected marked seizure improvement in paediatric epilepsy surgery candidates.

Author

Hoei-Hansen, Christina E, Mathiasen, René, and Uldall, Peter

Abstract

Purpose: Epilepsy surgery is performed based on the assumption that medical refractory epilepsy will continue. Rarely seizure freedom occurs before surgery is performed, while the patient is being evaluated as an epilepsy surgery candidate. The aim of this study was to describe the number of children withdrawn from an epilepsy surgery programme due to unexpected seizure improvement.Methods: We retrospectively studied 173 children under 18 years with medical refractory epilepsy referred for epilepsy surgery between 1996 and 2010. Medical records were reviewed in 2012 and 2015.Results: At the first evaluation point in 2012, 13 patients were withdrawn from the epilepsy surgery programme due to unexpected marked improvement. In 2015, 6 of them were still seizure free. They had unexpected seizure freedom due to change in AED treatment (n=3) or after a febrile episode (n=3). The mean number of years they had had seizures was 3.4 years (range 0.6-6.2 years) and the number of seizures at inclusion was 209 per month (range 6-750 per month). The duration of follow-up was 6.6 years after inclusion into the epilepsy surgery programme (range 4.0-13.0 years). The aetiology of the epilepsy for these patients was heterotopia (n=1), focal cortical dysplasia (n=3), infarction (n=1) and unknown, with normal MRI (n=1). They all had an IQ in the normal range. Two of the remaining 7 children were operated later.Conclusion: Unexpected seizure control may occur during epilepsy surgery evaluation. [ABSTRACT FROM AUTHOR]

Published
2016
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