2021
ALG13 X‐linked intellectual disability: New variants, glycosylation analysis, and expanded phenotypes
Alsharhan H, He M, Edmondson AC, Daniel EJP, Chen J, Donald T, Bakhtiari S, Amor DJ, Jones EA, Vassallo G, Vincent M, Cogné B, Deb W, Werners AH, Jin SC, Bilguvar K, Christodoulou J, Webster RI, Yearwood KR, Ng BG, Freeze HH, Kruer MC, Li D, Raymond KM, Bhoj EJ, Sobering AK. ALG13 X‐linked intellectual disability: New variants, glycosylation analysis, and expanded phenotypes. Journal Of Inherited Metabolic Disease 2021, 44: 1001-1012. PMID: 33734437, PMCID: PMC8720508, DOI: 10.1002/jimd.12378.Peer-Reviewed Original ResearchConceptsTransferrin glycosylationProtein glycosylationPathogenic variantsN-glycansGlycosylation analysisGlycosylationVariable clinical phenotypeALG13Novel variantsPlasma glycansPhenotypeCongenital disorderIonization quadrupole timeVariantsUnderlying mechanismClinical phenotypeIntellectual disabilityNovo c.Unreported subjectsInfantile spasmsEpileptic encephalopathyClinical dataGlycansMale subjectsNeurodevelopmental course
2020
Bi-allelic GAD1 variants cause a neonatal onset syndromic developmental and epileptic encephalopathy
Chatron N, Becker F, Morsy H, Schmidts M, Hardies K, Tuysuz B, Roselli S, Najafi M, Alkaya DU, Ashrafzadeh F, Nabil A, Omar T, Maroofian R, Karimiani EG, Hussien H, Kok F, Ramos L, Gunes N, Bilguvar K, Labalme A, Alix E, Sanlaville D, de Bellescize J, Poulat AL, Helbig I, von Spiczak S, Baulac S, Barisic N, Balling R, Caglayan H, Craiu D, Guerrini R, Klein K, Marini C, Muhle H, Rosenow F, Serratosa J, Sterbova K, Weber Y, Moslemi A, Lerche H, May P, Lesca G, Weckhuysen S, Tajsharghi H. Bi-allelic GAD1 variants cause a neonatal onset syndromic developmental and epileptic encephalopathy. Brain 2020, 143: 1447-1461. PMID: 32282878, PMCID: PMC7241960, DOI: 10.1093/brain/awaa085.Peer-Reviewed Original ResearchConceptsEpileptic encephalopathyJoint contracturesSeizure onsetCleft palateMonths of lifePost-neonatal periodYears of ageBi-allelic lossΓ-aminobutyric acid (GABA) metabolismEnzyme GAD67Epileptic spasmsEarly EEGEpilepsy syndromesMyoclonic seizuresEarly-onset epilepsy syndromeDisease historyPes equinovarusPatientsNovel syndromeEncephalopathyBurst attenuationIndependent consanguineous familiesFirst monthTherapeutic hopeFunction variants
2019
De Novo Pathogenic Variants in CACNA1E Cause Developmental and Epileptic Encephalopathy with Contractures, Macrocephaly, and Dyskinesias
Helbig KL, Lauerer RJ, Bahr JC, Souza IA, Myers CT, Uysal B, Schwarz N, Gandini MA, Huang S, Keren B, Mignot C, Afenjar A, de Villemeur T, Héron D, Nava C, Valence S, Buratti J, Fagerberg CR, Soerensen KP, Kibaek M, Kamsteeg EJ, Koolen DA, Gunning B, Schelhaas HJ, Kruer MC, Fox J, Bakhtiari S, Jarrar R, Padilla-Lopez S, Lindstrom K, Jin SC, Zeng X, Bilguvar K, Papavasileiou A, Xing Q, Zhu C, Boysen K, Vairo F, Lanpher BC, Klee EW, Tillema JM, Payne ET, Cousin MA, Kruisselbrink TM, Wick MJ, Baker J, Haan E, Smith N, Sadeghpour A, Davis EE, Katsanis N, Corbett M, MacLennan A, Gecz J, Biskup S, Goldmann E, Rodan L, Kichula E, Segal E, Jackson K, Asamoah A, Dimmock D, McCarrier J, Botto L, Filloux F, Tvrdik T, Cascino G, Klingerman S, Neumann C, Wang R, Jacobsen J, Nolan M, Snell R, Lehnert K, Sadleir L, Anderlid B, Kvarnung M, Guerrini R, Friez M, Lyons M, Leonhard J, Kringlen G, Casas K, Achkar C, Smith E, Rotenberg A, Poduri A, Sanchis-Juan A, Carss K, Rankin J, Zeman A, Raymond F, Blyth M, Kerr B, Ruiz K, Urquhart J, Hughes I, Banka S, Hedrich U, Scheffer I, Helbig I, Zamponi G, Lerche H, Mefford H, Allori A, Angrist M, Ashley P, Bidegain M, Boyd B, Chambers E, Cope H, Cotten C, Curington T, Davis E, Ellestad S, Fisher K, French A, Gallentine W, Goldberg R, Hill K, Kansagra S, Katsanis S, Katsanis S, Kurtzberg J, Marcus J, McDonald M, Mikati M, Miller S, Murtha A, Perilla Y, Pizoli C, Purves T, Ross S, Sadeghpour A, Smith L, Wiener J. De Novo Pathogenic Variants in CACNA1E Cause Developmental and Epileptic Encephalopathy with Contractures, Macrocephaly, and Dyskinesias. American Journal Of Human Genetics 2019, 104: 562. PMID: 30849329, PMCID: PMC6407522, DOI: 10.1016/j.ajhg.2019.02.015.Peer-Reviewed Original Research
2018
De Novo Pathogenic Variants in CACNA1E Cause Developmental and Epileptic Encephalopathy with Contractures, Macrocephaly, and Dyskinesias
Helbig KL, Lauerer RJ, Bahr JC, Souza IA, Myers CT, Uysal B, Schwarz N, Gandini MA, Huang S, Keren B, Mignot C, Afenjar A, de Villemeur T, Héron D, Nava C, Valence S, Buratti J, Fagerberg CR, Soerensen KP, Kibaek M, Kamsteeg EJ, Koolen DA, Gunning B, Schelhaas HJ, Kruer MC, Fox J, Bakhtiari S, Jarrar R, Padilla-Lopez S, Lindstrom K, Jin SC, Zeng X, Bilguvar K, Papavasileiou A, Xing Q, Zhu C, Boysen K, Vairo F, Lanpher BC, Klee EW, Tillema JM, Payne ET, Cousin MA, Kruisselbrink TM, Wick MJ, Baker J, Haan E, Smith N, Sadeghpour A, Davis EE, Katsanis N, Genomics T, Allori A, Angrist M, Ashley P, Bidegain M, Boyd B, Chambers E, Cope H, Cotten C, Curington T, Davis E, Ellestad S, Fisher K, French A, Gallentine W, Goldberg R, Hill K, Kansagra S, Katsanis N, Katsanis S, Kurtzberg J, Marcus J, McDonald M, Mikati M, Miller S, Murtha A, Perilla Y, Pizoli C, Purves T, Ross S, Sadeghpour A, Smith E, Wiener J, Corbett M, MacLennan A, Gecz J, Biskup S, Goldmann E, Rodan L, Kichula E, Segal E, Jackson K, Asamoah A, Dimmock D, McCarrier J, Botto L, Filloux F, Tvrdik T, Cascino G, Klingerman S, Neumann C, Wang R, Jacobsen J, Nolan M, Snell R, Lehnert K, Sadleir L, Anderlid B, Kvarnung M, Guerrini R, Friez M, Lyons M, Leonhard J, Kringlen G, Casas K, Achkar C, Smith L, Rotenberg A, Poduri A, Sanchis-Juan A, Carss K, Rankin J, Zeman A, Raymond F, Blyth M, Kerr B, Ruiz K, Urquhart J, Hughes I, Banka S, Study D, Hedrich U, Scheffer I, Helbig I, Zamponi G, Lerche H, Mefford H. De Novo Pathogenic Variants in CACNA1E Cause Developmental and Epileptic Encephalopathy with Contractures, Macrocephaly, and Dyskinesias. American Journal Of Human Genetics 2018, 103: 666-678. PMID: 30343943, PMCID: PMC6216110, DOI: 10.1016/j.ajhg.2018.09.006.Peer-Reviewed Original ResearchConceptsR-type calcium currentsEpileptic encephalopathyCalcium currentPathogenic variantsDevelopmental impairmentR-type calcium channelsDe novo pathogenic variantsCause of DEEProfound developmental impairmentHyperkinetic movement disordersNovo pathogenic variantsAnti-epileptic drug topiramateCentral nervous systemAbundant epileptiform activityVoltage-gated CaSevere neurodevelopmental disorderSeizure freedomInfantile-onset seizuresIntractable seizuresEpileptiform activityVoltage-dependent activationMovement disordersSevere hypotoniaHuman epilepsySynaptic transmission
2017
GABBR2 mutations determine phenotype in rett syndrome and epileptic encephalopathy
Yoo Y, Jung J, Lee Y, Lee Y, Cho H, Na E, Hong J, Kim E, Lee JS, Lee JS, Hong C, Park S, Wie J, Miller K, Shur N, Clow C, Ebel RS, DeBrosse SD, Henderson LB, Willaert R, Castaldi C, Tikhonova I, Bilgüvar K, Mane S, Kim KJ, Hwang YS, Lee S, So I, Lim BC, Choi H, Seong JY, Shin YB, Jung H, Chae J, Choi M. GABBR2 mutations determine phenotype in rett syndrome and epileptic encephalopathy. Annals Of Neurology 2017, 82: 466-478. PMID: 28856709, DOI: 10.1002/ana.25032.Peer-Reviewed Original ResearchConceptsRett syndromeGenetic factorsAppropriate medical interventionΓ-aminobutyric acid signalingDistinct diagnostic criteriaDevastating neurodevelopmental disorderWhole-exome sequencingAnn NeurolClinical featuresEE patientsEpileptic encephalopathyDe novo variantsNovel genetic factorsDiagnostic criteriaAnimal modelsMedical interventionsAccurate diagnosisReceptor activityReceptor functionSpecific molecular mechanismsPatientsRTT-like patientsNeurodevelopmental disordersNovo variantsMECP2 mutations