Abstract
In recent years, different mutations in genes that control the excitability of neurons have been described in idiopathic childhood epilepsies. Most commonly, sodium/potassium channelopathies and GABA-receptor mutations are involved. Major progress has been made in the field of idiopathic generalised epilepsies associated with febrile seizures (GEFS+). It now is becoming clear that mutations should not only be looked for in familial cases, but also in sporadic cases, especially in infants and young children with unexplained severe epileptic encephalopathies. Many studies also define ‘epilepsy susceptibility genes’, which contribute to one’s individual genetic vulnerability to develop epilepsy. It should be realized, however, that in the most common idiopathic benign childhood epilepsies (benign rolandic and occipital epilepsies), major breakthroughs are still awaited. In addition, a better clinical description of the epileptic phenotypes is needed to explain more precisely the genotypic and phenotypic heterogeneity. Genetic studies are nowadays becoming a necessary diagnostic step in the evaluation of idiopathic childhood epilepsies, not only in familial cases, but also in sporadic cases.
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Archer HL, Evans J, Edwards S, Colley J, Newbury-Ecob R, O’Callaghan F, Huyton M, O’Regan M, Tolmie J, Sampson J, Clarke A, Osborne J (2006) CDKL5 mutations cause infantile spasms, early onset seizures, and severe mental retardation in female patients. J Med Genet 43(9):729–734
Audenaert D, Claes L, Ceulemans B, Löfgren A, Van Broeckhoven C, De Jonghe P (2003) A deletion in SCN1B is associated with febrile seizures and early-onset absence epilepsy. Neurology 61(6):854–856
Audenaert D, Schwartz E, Claeys KG, Claes L, Deprez L, Suls A, Van Dyck T, Lagae L, Van Broeckhoven C, Macdonald RL, De Jonghe P (2006) A novel GABRG2 mutation associated with febrile seizures. Neurology 67(4):687–690
Audenaert D, Van Broeckhoven C, De Jonghe P (2006) Genes and loci involved in febrile seizures and related epilepsy syndromes. Hum Mutat 27(5):391–401
Baulac S, Huberfeld G, Gourfinkel-An I, Mitropoulou G, Beranger A, Prud’homme JF, Baulac M, Brice A, Bruzzone R, LeGuern E (2001) First genetic evidence of GABA(A) receptor dysfunction in epilepsy: a mutation in the gamma2-subunit gene. Nat Genet 28(1):46–48
Berkovic SF, Harkin L, McMahon JM, Pelekanos JT, Zuberi SM, Wirrell EC, Gill DS, Iona X, Mulley JC, Scheffer IE (2006) De-novo mutations of the sodium channel gene SCN1A in alleged vaccine encephalopathy: a retrospective study. Lancet Neurol 5(6):488–492
Berkovic SF, Heron SE, Giordano L, Marini C, Guerrini R, Kaplan RE, Gambardella A, Steinlein OK, Grinton BE, Dean JT, Bordo L, Hodgson BL, Yamamoto T, Mulley JC, Zara F, Scheffer IE (2004) Benign familial neonatal-infantile seizures: characterization of a new sodium channelopathy. Ann Neurol 55(4):550–557
Berkovic SF, Mulley JC, Scheffer IE, Petrou S (2006) Human epilepsies: interaction of genetic and acquired factors. Trends Neurosci 29(7):391–397
Bisulli F, Tinuper P, Scudellaro E, Naldi I, Bagattin A, Avoni P, Michelucci R, Nobile C (2004) A de novo LGI1 mutation in sporadic partial epilepsy with auditory features. Ann Neurol 56(3):455–456
Borgatti R, Zucca C, Cavallini A, Ferrario M, Panzeri C, Castaldo P, Soldovieri MV, Baschirotto C, Bresolin N, Dalla Bernardina B, Taglialatela M, Bassi MT (2004) A novel mutation in KCNQ2 associated with BFNC, drug resistant epilepsy, and mental retardation. Neurology 63(1):57–65
Brooks-Kayal AR, Pritchett DB (1993) Developmental changes in human gamma-aminobutyric acidA receptor subunit composition. Ann Neurol 34(5):687–693
Cavalleri GL, Walley NM, Soranzo N, Mulley J, Doherty CP, Kapoor A, Depondt C, Lynch JM, Scheffer IE, Heils A, Gehrmann A, Kinirons P, Gandhi S, Satishchandra P, Wood NW, Anand A, Sander T, Berkovic SF, Delanty N, Goldstein DB, Sisodiya SM (2007) A multicenter study of BRD2 as a risk factor for juvenile myoclonic epilepsy. Epilepsia 48(4):706–712
Ceulemans B, Boel M, Claes L, Dom L, Willekens H, Thiry P, Lagae L (2004) Severe myoclonic epilepsy in infancy: toward an optimal treatment. J Child Neurol 19(7):516–521
Ceulemans BP, Claes LR, Lagae LG (2004) Clinical correlations of mutations in the SCN1A gene: from febrile seizures to severe myoclonic epilepsy in infancy. Pediatr Neurol 30(4):236–243
Chen Y, Lu J, Pan H, Zhang Y, Wu H, Xu K, Liu X, Jiang Y, Bao X, Yao Z, Ding K, Lo WH, Qiang B, Chan P, Shen Y, Wu X (2003) Association between genetic variation of CACNA1H and childhood absence epilepsy. Ann Neurol 54(2):239–243
Chiron C, Marchand MC, Tran A, Rey E, d’Athis P, Vincent J, Dulac O, Pons G (2000) Stiripentol in severe myoclonic epilepsy in infancy: a randomised placebo-controlled syndrome-dedicated trial. STICLO study group. Lancet 356(9242):1638–1642
Chou IC, Lee CC, Tsai CH, Tsai Y, Wan L, Hsu YA, Li TC, Tsai FJ (2007) Association of GABRG2 polymorphisms with idiopathic generalized epilepsy. Pediatr Neurol 36(1):40–44
Claes L, Del-Favero J, Ceulemans B, Lagae L, Van Broeckhoven C, De Jonghe P (2001) De novo mutations in the sodium-channel gene SCN1A cause severe myoclonic epilepsy of infancy. Am J Hum Genet 68(6):1327–1332
Claes S, Devriendt K, Lagae L, Ceulemans B, Dom L, Casaer P, Raeymaekers P, Cassiman JJ, Fryns JP (1997) The X-linked infantile spasms syndrome (MIM 308350) maps to Xp11.4-Xpter in two pedigrees. Ann Neurol 42(3):360–364
Commission on Classification and Terminology of the International League Against Epilepsy (1989) Proposal for revised classification of epilepsies and epileptic syndromes. Epilepsia 30(4):389–399
Cossette P, Liu L, Brisebois K, Dong H, Lortie A, Vanasse M, Saint-Hilaire JM, Carmant L, Verner A, Lu WY, Wang YT, Rouleau GA (2002) Mutation of GABRA1 in an autosomal dominant form of juvenile myoclonic epilepsy. Nat Genet 31(2):184–189
de Ravel TJ, Devriendt K, Fryns JP, Vermeesch JR (2007) What’s new in karyotyping? The move towards array comparative genomic hybridisation (CGH). Eur J Pediatr 166(7):637–643
Dibbens LM, Ekberg J, Taylor I, Hodgson BL, Conroy SJ, Lensink IL, Kumar S, Zielinski MA, Harkin LA, Sutherland GR, Adams DJ, Berkovic SF, Scheffer IE, Mulley JC, Poronnik P (2007) NEDD4–2 as a potential candidate susceptibility gene for epileptic photosensitivity. Genes Brain Behav 6(8):750–755
Dibbens LM, Feng HJ, Richards MC, Harkin LA, Hodgson BL, Scott D, Jenkins M, Petrou S, Sutherland GR, Scheffer IE, Berkovic SF, Macdonald RL, Mulley JC (2004) GABRD encoding a protein for extra- or peri-synaptic GABAA receptors is a susceptibility locus for generalized epilepsies. Hum Mol Genet 13(13):1315–1319
Engel J Jr (2001) A proposed diagnostic scheme for people with epileptic seizures and with epilepsy: report of the ILAE task force on classification and terminology. Epilepsia 42:796–803
Harkin LA, Bowser DN, Dibbens LM, Singh R, Phillips F, Wallace RH, Richards MC, Williams DA, Mulley JC, Berkovic SF, Scheffer IE, Petrou S (2002) Truncation of the GABA(A)-receptor gamma2 subunit in a family with generalized epilepsy with febrile seizures plus. Am J Hum Genet 70(2):530–536
Harkin LA, McMahon JM, Iona X, Dibbens L, Pelekanos JT, Zuberi SM, Sadleir LG, Andermann E, Gill D, Farrell K, Connolly M, Stanley T, Harbord M, Andermann F, Wang J, Batish SD, Jones JG, Seltzer WK, Gardner A; Infantile Epileptic Encephalopathy Referral Consortium, Sutherland G, Berkovic SF, Mulley JC, Scheffer IE (2007) The spectrum of SCN1A-related infantile epileptic encephalopathies. Brain 130:843–852
Haug K, Warnstedt M, Alekov AK, Sander T, Ramírez A, Poser B, Maljevic S, Hebeisen S, Kubisch C, Rebstock J, Horvath S, Hallmann K, Dullinger JS, Rau B, Haverkamp F, Beyenburg S, Schulz H, Janz D, Giese B, Müller-Newen G, Propping P, Elger CE, Fahlke C, Lerche H, Heils A (2003) Mutations in CLCN2 encoding a voltage-gated chloride channel are associated with idiopathic generalized epilepsies. Nat Genet 33(4):527–532
Heron SE, Crossland KM, Andermann E, Phillips HA, Hall AJ, Bleasel A, Shevell M, Mercho S, Seni MH, Guiot MC, Mulley JC, Berkovic SF, Scheffer IE (2002) Sodium-channel defects in benign familial neonatal-infantile seizures. Lancet 360(9336):851–852
Heron SE, Phillips HA, Mulley JC, Mazarib A, Neufeld MY, Berkovic SF, Scheffer IE (2004) Genetic variation of CACNA1H in idiopathic generalized epilepsy. Ann Neurol 55(4):595–596
Heron SE, Scheffer IE, Berkovic SF, Dibbens LM, Mulley JC (2007) Channelopathies in idiopathic epilepsy. Neurotherapeutics 4(2):295–304
Kahane P, Arzimanoglou A (2007) Vaccine encephalopathy: a myth collapses? Presse Med 36(10 Pt 1):1339–1340
Kalachikov S, Evgrafov O, Ross B, Winawer M, Barker-Cummings C, Martinelli Boneschi F, Choi C, Morozov P, Das K, Teplitskaya E, Yu A, Cayanis E, Penchaszadeh G, Kottmann AH, Pedley TA, Hauser WA, Ottman R, Gilliam TC (2002) Mutations in LGI1 cause autosomal-dominant partial epilepsy with auditory features. Nat Genet 30(3):335–341
Lagae L (2000) Cortical malformations: a frequent cause of epilepsy in children. Eur J Pediatr 159(8):555–562
Lian G, Sheen V (2006) Cerebral developmental disorders. Curr Opin Pediatr 18(6):614–620
Lucarini N, Verrotti A, Napolioni V, Bosco G, Curatolo P (2007) Genetic polymorphisms and idiopathic generalized epilepsies. Pediatr Neurol 37(3):157–164
Maljevic S, Krampfl K, Cobilanschi J, Tilgen N, Beyer S, Weber YG, Schlesinger F, Ursu D, Melzer W, Cossette P, Bufler J, Lerche H, Heils A (2006) A mutation in the GABA(A) receptor alpha(1)-subunit is associated with absence epilepsy. Ann Neurol 59(6):983–987
Marini C, Guerrini R (2007) The role of the nicotinic acetylcholine receptors in sleep-related epilepsy. Biochem Pharmacol 74(8):1308–1314
Mulley JC, Scheffer IE, Petrou S, Dibbens LM, Berkovic SF, Harkin LA (2005) SCN1A mutations and epilepsy. Hum Mutat 25(6):535–542
Nakayama J, Arinami T (2006) Molecular genetics of febrile seizures. Epilepsy Res 70(Suppl 1):S190–S198
Noebels JL (2006) The Judith Hoyer Lecture: genes, pixels, patterns, and prevention. Epilepsy Behav 9(3):379–385
Pinto D, Louwaars S, Westland B, Volkers L, de Haan GJ, Trenité DG, Lindhout D, Koeleman BP (2006) Heterogeneity at the JME 6p11–12 locus: absence of mutations in the EFHC1 gene in linked Dutch families. Epilepsia 47(10):1743–1746
Rosas-Vargas H, Bahi-Buisson N, Philippe C, Nectoux J, Girard B, N’guyen Morel MA, Gitiaux C, Lazzaro L, Odent S, Jonveaux P, Chelly J, Bienvenu T (2007) Impairment of CDKL5 nuclear localization as a cause for severe infantile encephalopathy. J Med Genet 44:1–20
Scheffer IE, Berkovic SF (1997) Generalized epilepsy with febrile seizures plus. A genetic disorder with heterogeneous clinical phenotypes. Brain 120(Pt 3):479–490
Sherr EH (2003) The ARX story (epilepsy, mental retardation, autism, and cerebral malformations): one gene leads to many phenotypes. Curr Opin Pediatr 15(6):567–571
Singh NA, Charlier C, Stauffer D, DuPont BR, Leach RJ, Melis R, Ronen GM, Bjerre I, Quattlebaum T, Murphy JV, McHarg ML, Gagnon D, Rosales TO, Peiffer A, Anderson VE, Leppert M (1998) A novel potassium channel gene, KCNQ2, is mutated in an inherited epilepsy of newborns. Nat Genet 18(1):25–29
Singh NA, Westenskow P, Charlier C, Pappas C, Leslie J, Dillon J, Anderson VE, Sanguinetti MC, Leppert MF, BFNC Physician Consortium (2003) KCNQ2 and KCNQ3 potassium channel genes in benign familial neonatal convulsions: expansion of the functional and mutation spectrum. Brain 126(Pt 12):2726–2737
Specchio N, Vigevano F (2006) The spectrum of benign infantile seizures. Epilepsy Res 70(Suppl 1):S156–S167
Suzuki T, Delgado-Escueta AV, Aguan K, Alonso ME, Shi J, Hara Y, Nishida M, Numata T, Medina MT, Takeuchi T, Morita R, Bai D, Ganesh S, Sugimoto Y, Inazawa J, Bailey JN, Ochoa A, Jara-Prado A, Rasmussen A, Ramos-Peek J, Cordova S, Rubio-Donnadieu F, Inoue Y, Osawa M, Kaneko S, Oguni H, Mori Y, Yamakawa K (2004) Mutations in EFHC1 cause juvenile myoclonic epilepsy. Nat Genet 36(8):842–849
Terwindt GM, Ophoff RA, Lindhout D, Haan J, Halley DJ, Sandkuijl LA, Brouwer OF, Frants RR, Ferrari MD (1997) Partial cosegregation of familial hemiplegic migraine and a benign familial infantile epileptic syndrome. Epilepsia 38(8):915–921
Van Bogaert P, Azizieh R, Désir J, Aeby A, De Meirleir L, Laes JF, Christiaens F, Abramowicz MJ (2007) Mutation of a potassium channel-related gene in progressive myoclonic epilepsy. Ann Neurol 61(6):579–586
Vanmolkot KR, Kors EE, Hottenga JJ, Terwindt GM, Haan J, Hoefnagels WA, Black DF, Sandkuijl LA, Frants RR, Ferrari MD, van den Maagdenberg AM (2003) Novel mutations in the Na+ , K+ -ATPase pump gene ATP1A2 associated with familial hemiplegic migraine and benign familial infantile convulsions. Ann Neurol 54(3):360–366
Vigevano F (2005) Benign familial infantile seizures. Brain Dev 27(3):172–177
Wallace RH, Marini C, Petrou S, Harkin LA, Bowser DN, Panchal RG, Williams DA, Sutherland GR, Mulley JC, Scheffer IE, Berkovic SF (2001) Mutant GABA(A) receptor gamma2-subunit in childhood absence epilepsy and febrile seizures. Nat Genet 28(1):49–52
Wallace RH, Scheffer IE, Barnett S, Richards M, Dibbens L, Desai RR, Lerman-Sagie T, Lev D, Mazarib A, Brand N, Ben-Zeev B, Goikhman I, Singh R, Kremmidiotis G, Gardner A, Sutherland GR, George AL Jr, Mulley JC, Berkovic SF (2001) Neuronal sodium-channel alpha1-subunit mutations in generalized epilepsy with febrile seizures plus. Am J Hum Genet 68(4):859–865
Wallace RH, Scheffer IE, Parasivam G, Barnett S, Wallace GB, Sutherland GR, Berkovic SF, Mulley JC (2002) Generalized epilepsy with febrile seizures plus: mutation of the sodium channel subunit SCN1B. Neurology 58(9):1426–1429
Wallace RH, Wang DW, Singh R, Scheffer IE, George AL Jr, Phillips HA, Saar K, Reis A, Johnson EW, Sutherland GR, Berkovic SF, Mulley JC (1998) Febrile seizures and generalized epilepsy associated with a mutation in the Na+-channel beta1 subunit gene SCN1B. Nat Genet 19(4):366–370
Yu ZL, Jiang JM, Wu DH, Xie HJ, Jiang JJ, Zhou L, Peng L, Bao GS (2007) Febrile seizures are associated with mutation of seizure-related (SEZ) 6, a brain-specific gene. J Neurosci Res 85(1):166–172
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Lagae, L. What’s new in: “Genetics in childhood epilepsy”. Eur J Pediatr 167, 715–722 (2008). https://doi.org/10.1007/s00431-008-0690-5
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DOI: https://doi.org/10.1007/s00431-008-0690-5