How gene mutations cause epilepsy
Grant number: 1005050 | Funding period: 2011 - 2015
Variation in our genetic makeup can cause serious brain disorders such as epilepsy. The goal of this research is to determine how variation in an epilepsy patients genes produce fundamental changes in brain function that lead to epilepsy. This is a multidisciplinary program that combines clinical, genetic, electrophysiological, morphological and computational approaches to create a fundamental understanding of the genesis of this important disease.
Related publications (26)
Novel MissenseCACNA1GMutations Associated with Infantile-Onset Developmental and Epileptic Encephalopathy
Geza Berecki, Katherine L Helbig, Tyson L Ware, Bronwyn Grinton, Cara M Skraban, Eric D Marsh, Samuel F Berkovic, Steven Petrou
The CACNA1G gene encodes the low-voltage-activated Cav3.1 channel, which is expressed in various areas of the CNS, including the c..
Estimating neuronal conductance model parameters using dynamic action potential clamp
Y Deerasooriya, G Berecki, D Kaplan, IC Forster, S Halgamuge, S Petrou
Parameterization of neuronal membrane conductance models relies on data acquired from current clamp (CC) or voltage clamp (VC) rec..
SCN1A gain of function in early infantile encephalopathy
Geza Berecki, Alexander Bryson, Jan Terhag, Snezana Maljevic, Elena Gazina, Sean L Hill, Steven Petrou
OBJECTIVE: To elucidate the biophysical basis underlying the distinct and severe clinical presentation in patients with the recurr..
Dynamic action potential clamp predicts functional separation in mild familial and severe de novo forms of SCN2A epilepsy
Geza Berecki, Katherine B Howell, Yadeesha H Deerasooriya, Maria Roberta Cilio, Megan K Oliva, David Kaplan, Ingrid E Scheffer, Samuel F Berkovic, Steven Petrou
De novo variants in SCN2A developmental and epileptic encephalopathy (DEE) show distinctive genotype-phenotype correlations. The t..
Gain-of-function HCN2 variants in genetic epilepsy
Melody Li, Snezana Maljevic, A Marie Phillips, Slave Petrovski, Michael S Hildebrand, Rosemary Burgess, Therese Mount, Federico Zara, Pasquale Striano, Julian Schubert, Holger Thiele, Peter Nuernberg, Michael Wong, Judith L Weisenberg, Liu Lin Thio, Holger Lerche, Ingrid E Scheffer, Samuel F Berkovic, Steven Petrou, Christopher A Reid
Genetic generalized epilepsy (GGE) is a common epilepsy syndrome that encompasses seizure disorders characterized by spike-and-wav..
Non-Neurotoxic Nanodiamond Probes for Intraneuronal Temperature Mapping
David A Simpson, Emma Morrisroe, Julia M McCoey, Alain H Lombard, Dulini C Mendis, Francois Treussart, Liam T Hall, Steven Petrou, Lloyd CL Hollenberg
Optical biomarkers have been used extensively for intracellular imaging with high spatial and temporal resolution. Extending the m..
Electron paramagnetic resonance microscopy using spins in diamond under ambient conditions
David A Simpson, Robert G Ryan, Liam T Hall, Evgeniy Panchenko, Simon C Drew, Steven Petrou, Paul S Donnelly, Paul Mulvaney, Lloyd CL Hollenberg
Magnetic resonance spectroscopy is one of the most important tools in chemical and bio-medical research. However, sensitivity limi..
Magneto-optical imaging of thin magnetic films using spins in diamond
David A Simpson, Jean-Philippe Tetienne, Julia M McCoey, Kumaravelu Ganesan, Liam T Hall, Steven Petrou, Robert E Scholten, Lloyd CL Hollenberg
Imaging the fields of magnetic materials provides crucial insight into the physical and chemical processes surrounding magnetism, ..
Cortical alterations in a model for absence epilepsy and febrile seizures: In vivo findings in mice carrying a human GABA(A)R gamma2 subunit mutation
Jens Witsch, Daniel Golkowski, Thomas TG Hahn, Steven Petrou, Hartwig Spors
Childhood absence epilepsy (CAE) is one of the most common forms of epilepsy among children. The study of a large Australian famil..
Sodium Channel beta 1 Subunit Localizes to Axon Initial Segments of Excitatory and Inhibitory Neurons and Shows Regional Heterogeneity in Mouse Brain
Verena C Wimmer, Rosemary C Harty, Kay L Richards, A Marie Phillips, Haruko Miyazaki, Nobuyuki Nukina, Steven Petrou
The β1 subunit of voltage-gated sodium channels, Nav β1, plays multiple roles in neurons spanning electrophysiological modulation ..
'Neonatal' Na(v)1.2 reduces neuronal excitability and affects seizure susceptibility and behaviour
Elena V Gazina, Bryan TW Leaw, Kay L Richards, Verena C Wimmer, Tae H Kim, Timothy D Aumann, Travis J Featherby, Leonid Churilov, Vicki E Hammond, Christopher A Reid, Steven Petrou
Developmentally regulated alternative splicing produces 'neonatal' and 'adult' isoforms of four Na(+) channels in human brain, NaV..
A recurrent de novo mutation in KCNC1 causes progressive myoclonus epilepsy
Mikko Muona, Samuel F Berkovic, Leanne M Dibbens, Karen L Oliver, Snezana Maljevic, Marta A Bayly, Tarja Joensuu, Laura Canafoglia, Silvana Franceschetti, Roberto Michelucci, Salla Markkinen, Sarah E Heron, Michael S Hildebrand, Eva Andermann, Frederick Andermann, Antonio Gambardella, Paolo Tinuper, Laura Licchetta, Ingrid E Scheffer, Chiara Criscuolo
Progressive myoclonus epilepsies (PMEs) are a group of rare, inherited disorders manifesting with action myoclonus, tonic-clonic s..
Oxcarbazepine and its active metabolite, (S)-licarbazepine, exacerbate seizures in a mouse model of genetic generalized epilepsy
Tae Hwan Kim, Christopher A Reid, Steven Petrou
Oxcarbazepine (OXC), widely used to treat focal epilepsy, is reported to exacerbate seizures in patients with generalized epilepsy..
Mapping somatosensory connectivity in adult mice using diffusion MRI tractography and super-resolution track density imaging
Kay Richards, Fernando Calamante, Jacques-Donald Tournier, Nyoman D Kurniawan, Farnoosh Sadeghian, Alexander R Retchford, Gabriel Davis Jones, Christopher A Reid, David C Reutens, Roger Ordidge, Alan Connelly, Steven Petrou
In this study we combined ultra-high field diffusion MRI fiber tracking and super-resolution track density imaging (TDI) to map th..
Physiological and genetic analysis of multiple sodium channel variants in a model of genetic absence epilepsy
MK Oliva, TC McGarr, BJ Beyer, E Gazina, DI Kaplan, L Cordeiro, E Thomas, SD Dib-Hajj, SG Waxman, WN Frankel, S Petrou
In excitatory neurons, SCN2A (NaV1.2) and SCN8A (NaV1.6) sodium channels are enriched at the axon initial segment. NaV1.6 is impli..
Reduced dendritic arborization and hyperexcitability of pyramidal neurons in a Scn1b-based model of Dravet syndrome
Christopher A Reid, Bryan Leaw, Kay L Richards, Robert Richardson, Verena Wimmer, Christiaan Yu, Elisa L Hill-Yardin, Holger Lerche, Ingrid E Scheffer, Samuel F Berkovic, Steven Petrou
Epileptic encephalopathies, including Dravet syndrome, are severe treatment-resistant epilepsies with developmental regression. We..
Enhanced in vitro CA1 network activity in a sodium channel beta 1(C121W) subunit model of genetic epilepsy
Robert J Hatch, Christopher A Reid, Steven Petrou
OBJECTIVE: A NaV β1(C121W) mouse model of human genetic epilepsy has enhanced neuronal excitability and temperature sensitivity at..
KCNT1 Gain of Function in 2 Epilepsy Phenotypes is Reversed by Quinidine
Carol J Milligan, Melody Li, Elena V Gazina, Sarah E Heron, Umesh Nair, Chantel Trager, Christopher A Reid, Anu Venkat, Donald P Younkin, Dennis J Dlugos, Slave Petrovski, David B Goldstein, Leanne M Dibbens, Ingrid E Scheffer, Samuel F Berkovic, Steven Petrou
OBJECTIVE: Mutations in KCNT1 have been implicated in autosomal dominant nocturnal frontal lobe epilepsy (ADNFLE) and epilepsy of ..
Spike-and-wave discharge mediated reduction in hippocampal HCN1 channel function associates with learning deficits in a genetic mouse model of epilepsy
A Marie Phillips, Taehwan Kim, Ernesto Vargas, Steven Petrou, Christopher A Reid
The GABAAγ2(R43Q) mouse is an established model of absence epilepsy displaying spontaneous spike-and-wave discharges (SWD) and ass..
Axon initial segment structural plasticity in animal models of genetic and acquired epilepsy
Rosemary C Harty, Tae Hwan Kim, Evan A Thomas, Lisa Cardamone, Nigel C Jones, Steven Petrou, Verena C Wimmer
A novel form of neuronal plasticity, occurring at the axon initial segment (AIS), has recently been described. Lengthening of the ..
Hippocampal volume and cell density changes in a mouse model of human genetic epilepsy
Kay L Richards, Nyoman D Kurniawan, Zhengyi Yang, Tae Hwan Kim, Marianne D Keller, Jun Low, Jeremy FP Ullmann, Stacey Cole, Samuel Foong, Graham J Galloway, Christopher A Reid, George Paxinos, David C Reutens, Steven Petrou
OBJECTIVE: The human γ-aminobutyric acid type A (GABAA)γ2R43Q (R43Q) mutation is associated with genetic epilepsy with febrile sei..
Missense mutations in the sodium-gated potassium channel gene KCNT1 cause severe autosomal dominant nocturnal frontal lobe epilepsy
Sarah E Heron, Katherine R Smith, Melanie Bahlo, Lino Nobili, Esther Kahana, Laura Licchetta, Karen L Oliver, Aziz Mazarib, Zaid Afawi, Amos Korczyn, Giuseppe Plazzi, Steven Petrou, Samuel F Berkovic, Ingrid E Scheffer, Leanne M Dibbens
We performed genomic mapping of a family with autosomal dominant nocturnal frontal lobe epilepsy (ADNFLE) and intellectual and psy..