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Mutations inNHLRC1 cause progressive myoclonus epilepsy
- Elayne M Chan1,2,
- Edwin J Young1,
- Leonarda Ianzano1,
- Iulia Munteanu1,
- Xiaochu Zhao1,
- Constantine C Christopoulos1,
- Giuliano Avanzini3,
- Maurizio Elia4,
- Cameron A Ackerley5,
- Nebojsa J Jovic6,
- Saeed Bohlega7,
- Eva Andermann8,
- Guy A Rouleau9,
- Antonio V Delgado-Escueta10,
- Berge A Minassian1,11 na1 &
- …
- Stephen W Scherer1,2 na1
Nature Geneticsvolume 35, pages125–127 (2003)Cite this article
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Abstract
Lafora progressive myoclonus epilepsy is characterized by pathognomonic endoplasmic reticulum (ER)-associated polyglucosan accumulations. We previously discovered that mutations inEPM2A cause Lafora disease. Here, we identify a second gene associated with this disease,NHLRC1 (also calledEPM2B), which encodes malin, a putative E3 ubiquitin ligase with a RING finger domain and six NHL motifs. Laforin and malin colocalize to the ER, suggesting they operate in a related pathway protecting against polyglucosan accumulation and epilepsy.
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Acknowledgements
We thank members of The Centre for Applied Genomics (http://tcag.bioinfo.sickkids.on.ca/) for assistance, notably A. Paterson and D. Bulman; the families with Lafora disease for support; and L. Palm, A. Prasad, D. Buckley, T. Minett, W. Bara-Jimenez, L. Jardim and J.M. Saraiva, who contributed single cases. This work was funded by the Canadian Institutes of Health Research, the Canadian Genetic Diseases Network, Genome Canada and the Hospital for Sick Children Foundation. L.I. is supported by the Comitato Telethon Fondazione Onlus. S.W.S. is an Investigator of CIHR and International Scholar of the Howard Hughes Medical Institute.
Author information
Berge A Minassian and Stephen W Scherer: These authors contributed equally to this work.
Authors and Affiliations
Program in Genetics and Genomic Biology, Research Institute, The Hospital for Sick Children, 555 University Avenue, Toronto, M5G 1X8, Ontario, Canada
Elayne M Chan, Edwin J Young, Leonarda Ianzano, Iulia Munteanu, Xiaochu Zhao, Constantine C Christopoulos, Berge A Minassian & Stephen W Scherer
Department of Molecular and Medical Genetics, University of Toronto, Canada
Elayne M Chan & Stephen W Scherer
Instituto Nazionale Neurologico, Besta, Via Celoria, Milano, 11 20133, Italy
Giuliano Avanzini
Department of Neurology, Oasi Institute for Research on Mental Retardation and Brain Aging, Via Conte Ruggero, Troina, 73 94018, Italy
Maurizio Elia
Department of Pathology and Laboratory Medicine, The Hospital for Sick Children, 555 University Avenue, Toronto, M5G 1X8, Ontario, Canada
Cameron A Ackerley
Clinic of Neurology and Psychiatry for Children and Youth, Dr Subotica 6a St., Belgrade, 11 000, Serbia & Montenegro
Nebojsa J Jovic
Department of Neurosciences, King Faisal Specialist Hospital & Research Centre, P.O. Box 3354, Riyadh, 11211, Saudi Arabia
Saeed Bohlega
Neurogenetics Unit, Montreal Neurological Institute, McGill University, 3801 University St., Montreal, H3A 2B4, Quebec, Canada
Eva Andermann
McGill University Health Centre Research Institute Centre for Research in Neuroscience, Montreal General Hospital, 1650 Cedar Ave., Montreal, H3G 1A4, Quebec, Canada
Guy A Rouleau
Department of Neurology and Brain Research Institute, Comprehensive Epilepsy Program, University of California, Los Angeles School of Medicine, West Los Angeles DVA Medical Center, 11301 Wilshire Blvd., Los Angeles, 90073, California, USA
Antonio V Delgado-Escueta
Division of Neurology, Department of Pediatrics, The Hospital for Sick Children and University of Toronto, 555 University Ave., Toronto, M5G 1X8, Ontario, Canada
Berge A Minassian
- Elayne M Chan
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- Edwin J Young
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- Leonarda Ianzano
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- Iulia Munteanu
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- Xiaochu Zhao
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- Guy A Rouleau
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Correspondence toBerge A Minassian orStephen W Scherer.
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Chan, E., Young, E., Ianzano, L.et al. Mutations inNHLRC1 cause progressive myoclonus epilepsy.Nat Genet35, 125–127 (2003). https://doi.org/10.1038/ng1238
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