MB ChB MD DipPaed FRACP
Professor in the Department of Paediatrics
Professor Lynette Sadleir joined the Department of Paediatrics and Child Health in 1999 following the completion of an Epilepsy Fellowship at British Columbia’s Children’s Hospital.
In 2000 she commenced the clinical part of her joint clinical-academic appointment as a paediatric neurologist with CCDHB. In her clinical role as a paediatric epileptologist, she diagnoses and manages children with epilepsy and reports paediatric electroencephalograms for the Wellington Region.
She has an active teaching role and is passionate about increasing the epilepsy knowledge of undergraduate, post graduate and Paediatric fellow trainees. She was a member of the International League Against Epilepsy (ILAE) Classification Commission Task Force between 2010 and 2013 and as such part of the team that wrote and developed the ILAE cutting edge online diagnostic manual of the epilepsies https://www.epilepsydiagnosis.org/.
Professor Sadleir is a physician scientist with expertise in epilepsy phenotyping. She is the Director of the Epilepsy Research Group. The Epilepsy Research Group is committed to improving the quality of life for individuals with epilepsy and their families.
Professor Sadleir is the president of the New Zealand League Against Epilepsy and a member of both the Ministry of Health Complex Epilepsy Improvement Technical Advisory Group and the Paediatric Society’s Neurology Clinical Network Clinical Reference Group. In this capacity, she co-led the development of the New Zealand Epilepsy Guidelines and Pathways for Children and Young People. She is presently the chair of the International League Against Epilepsy Budget Review Committee and a member of the International League Against Epilepsy Clinical Genetic Testing in the Epilepsies Task Force.
Research areas
Professor Sadleir founded the Epilepsy Research Group in 2007. The group undertakes research into the clinical and genetic aspects of epilepsy. The aim of the research is to better describe the epilepsies and identify the genes that cause them. The overall rationale is that by understanding the basic molecular mechanisms of the inherited epilepsies we will get a deeper understanding of the disorder, with implications for diagnosis, prognosis and development of new treatments.
Publications
Epi25 Collaborative, including Sadleir, L. G., King, C., & Mountier, E. (2019). Ultra-rare genetic variation in the epilepsies: A whole-exome sequencing study of 17,606 individuals. American Journal of Human Genetics. Advance online publication. doi: 10.1016/j.ajhg.2019.05.020
Vlaskamp, D. R. M., Bassett, A. S., Sullivan, J. E., Robblee, J., Sadleir, L. G., Scheffer, I. E., & Andrade, D. M. (2019). Schizophrenia is a later‐onset feature of PCDH19 girls clustering epilepsy. Epilepsia, 60(3), 429-440. doi: 10.1111/epi.14678
Kolc, K. L., Sadleir, L. G., Scheffer, I. E., Ivancevic, A., Roberts, R., Pham, D., & Gecz, J. (2019). A systematic review and meta-analysis of 271 PCDH19-variant individuals identifies psychiatric comorbidities, and association of seizure onset and disease severity. Molecular Psychiatry, 24, 241-251. doi: 10.1038/s41380-018-0066-9
Osborne, J. P., Edwards, S. W., Dietrich Alber, F., Hancock, E., Johnson, A. L., Kennedy, C. R., … on behalf of the participating investigators, including Sadleir, L. (2019). The underlying etiology of infantile spasms (West syndrome): Information from the International Collaborative Infantile Spasms Study (ICISS). Epilepsia. Advance online publication. doi: 10.1111/epi.16305
Sands, T. T., Miceli, F., Lesca, G., Beck, A. E., Sadleir, L. G., Arrington, D. K., … Cilio, M. R. (2019). Autism and developmental disability caused by KCNQ3 gain-of-function variants. Annals of Neurology, 86(2), 181-192. doi: 10.1002/ana.25522
Chapter in Book - Research
Sadleir, L. G., Gecz, J., & Scheffer, I. E. (2016). Epilepsies that occur predominantly in girls. In M. V. Johnston, H. P. Adams & A. Fatemi (Eds.), Neurobiology of disease. (2nd ed.) (pp. 307-311). New York, NY: Oxford University Press.
Sadleir, L. G. (2013). Childhood absence epilepsy and myoclonic absence epilepsy. In M. Duchowny, H. Cross & A. Arzimanoglou (Eds.), Pediatric epilepsy. (pp. 152-161). New York, NY: McGraw-Hill Education.
Journal - Research Article
Epi25 Collaborative, including Sadleir, L. G., King, C., & Mountier, E. (2019). Ultra-rare genetic variation in the epilepsies: A whole-exome sequencing study of 17,606 individuals. American Journal of Human Genetics. Advance online publication. doi: 10.1016/j.ajhg.2019.05.020
Sands, T. T., Miceli, F., Lesca, G., Beck, A. E., Sadleir, L. G., Arrington, D. K., … Cilio, M. R. (2019). Autism and developmental disability caused by KCNQ3 gain-of-function variants. Annals of Neurology, 86(2), 181-192. doi: 10.1002/ana.25522
Osborne, J. P., Edwards, S. W., Dietrich Alber, F., Hancock, E., Johnson, A. L., Kennedy, C. R., … on behalf of the participating investigators, including Sadleir, L. (2019). The underlying etiology of infantile spasms (West syndrome): Information from the International Collaborative Infantile Spasms Study (ICISS). Epilepsia. Advance online publication. doi: 10.1111/epi.16305
Kolc, K. L., Sadleir, L. G., Scheffer, I. E., Ivancevic, A., Roberts, R., Pham, D., & Gecz, J. (2019). A systematic review and meta-analysis of 271 PCDH19-variant individuals identifies psychiatric comorbidities, and association of seizure onset and disease severity. Molecular Psychiatry, 24, 241-251. doi: 10.1038/s41380-018-0066-9
Vlaskamp, D. R. M., Bassett, A. S., Sullivan, J. E., Robblee, J., Sadleir, L. G., Scheffer, I. E., & Andrade, D. M. (2019). Schizophrenia is a later‐onset feature of PCDH19 girls clustering epilepsy. Epilepsia, 60(3), 429-440. doi: 10.1111/epi.14678
Ellis, C. A., Churilov, L., Epstein, M. P., Xie, S. X., Bellows, S. T., Ottoman, R., … for the Epi4K Consortium, including Sadleir, L. G. (2019). Epilepsy in families: Age at onset is a familial trait, independent of syndrome. Annals of Neurology, 86(1), 91-98. doi: 10.1002/ana.25499
O’Callaghan, F. J. K., Edwards, S. W., Dietrich Alber, F., Cortina Borja, M., Hancock, E., Johnson, A. L., … on behalf of the International Collaborative Infantile Spasms Study (ICISS) investigators, including Sadleir, L. (2018). Vigabatrin with hormonal treatment versus hormonal treatment alone (ICISS) for infantile spasms: 18-month outcomes of an open-label, randomised controlled trial. Lancet Child & Adolescent Health, 2(10), 715-725. doi: 10.1016/S2352-4642(18)30244-X
Myers, K. A., Bello-Espinosa, L. E., Symonds, J. D., Zuberi, S. M., Clegg, R., Sadleir, L. G., … Scheffer, I. E. (2018). Heart rate variability in epilepsy: A potential biomarker of sudden unexpected death in epilepsy risk. Epilepsia. Advance online publication. doi: 10.1111/epi.14438
Helbig, K. L., Lauerer, R. J., Bahr, J. C., Souza, I. A., Myers, C. T., . . ., Sadleir, L. G., … Mefford, H. C. (2018). De novo pathogenic variants in CACNA1E cause developmental and epileptic encephalopathy with contractures, macrocephaly, and dyskinesias. American Journal of Human Genetics. Advance online publication. doi: 10.1016/j.ajhg.2018.09.006
Gregor, A., Sadleir, L. G., Asadollahi, R., Azzarello-Burri, S., Battaglia, A., Bomme Ousager, L., … Zweier, C. (2018). De novo variants in the F-Box protein FBXO11 in 20 individuals with a variable neurodevelopmental disorder. American Journal of Human Genetics, 103(2), 305-316. doi: 10.1016/j.ajhg.2018.07.003
Devinsky, O., Cross, H., Laux, L., Marsh, E., Miller, I., Nabbout, R., … for the Cannabidiol in Dravet Syndrome Study Group, including Sadleir, L. (2017). Trial of cannabidiol for drug-resistant seizures in the Dravet syndrome. New England Journal of Medicine, 376(21), 2011-2020. doi: 10.1056/NEJMoa1611618
O’Callaghan, F. J. K., Edwards, S. W., Dietrich Alber, F., Hancock, E., Johnson, A. L., Kennedy, C. R., … on behalf of the participating investigators, including Sadleir, L. (2017). Safety and effectiveness of hormonal treatment versus hormonal treatment with vigabatrin for infantile spasms (ICISS): A randomised, multicentre, open-label trial. Lancet Neurology, 16(1), 33-42. doi: 10.1016/S1474-4422(16)30294-0
Sadleir, L. G., Mountier, E. I., Gill, D., Davis, S., Joshi, C., DeVile, C., … Scheffer, I. E. (2017). Not all SCN1A epileptic encephalopathies are Dravet syndrome: Early profound Thr226Met phenotype. Neurology, 89(10), 1035-1042. doi: 10.1212/wnl.0000000000004331
Myers, C. T., Stong, N., Mountier, E. I., Helbig, K. L., Freytag, S., Sullivan, J. E., … Sadleir, L. G., … Heinzen, E. L. (2017). De novo mutations in PPP3CA cause severe neurodevelopmental disease with seizures. American Journal of Human Genetics, 101(4), 516-524. doi: 10.1016/j.ajhg.2017.08.013
Tobochnik, S., Fahlstrom, R., Shain, C., Winawer, M. R., for the EPGP Investigators, including Sadleir, L. (2017). Familial aggregation of focal seizure semiology in the Epilepsy Phenome/Genome Project. Neurology, 89(1), 22-28. doi: 10.1212/WNL.0000000000004052
Platzer, K., Yuan, H., Schütz, H., Winschel, A., Chen, W., Hu, C., … Sadleir, L., … Lemke, J. R. (2017). GRIN2B encephalopathy: Novel findings on phenotype, variant clustering, functional consequences and treatment aspects. Journal of Medical Genetics, 54(7), 460-470. doi: 10.1136/jmedgenet-2016-104509
Bergin, P. S., Beghi, E., Sadleir, L. G., Tripathi, M., Richardson, M. P., Bianchi, E., … on behalf of the EpiNet Study Group. (2017). Do neurologists around the world agree when diagnosing epilepsy?: Results of an international EpiNet study. Epilepsy Research, 139, 43-50. doi: 10.1016/j.eplepsyres.2017.10.014
Bergin, P. S., Beghi, E., Sadleir, L. G., Brockington, A., Tripathi, M., Richardson, M. P., … Rosemergy, I., … on behalf of the EpiNet Study Group, including Ranta, A. (2017). EpiNet as a way of involving more physicians and patients in epilepsy research: Validation study and accreditation process. Epilepsia Open, 2(1), 20-31. doi: 10.1002/epi4.12033
Hamdan, F. F., Myers, C. T., Cossette, P., Lemay, P., Spiegelman, D., Laporte, A. D., … Sadleir, L. G., … Michaud, J. L. (2017). High rate of recurrent de novo mutations in developmental and epileptic encephalopathies. American Journal of Human Genetics, 101, 664-685. doi: 10.1016/j.ajhg.2017.09.008
Epi4K Consortium, including Sadleir, L. G. (2017). Phenotypic analysis of 303 multiplex families with common epilepsies. Brain, 140(2), 2144-2156. doi: 10.1093/brain/awx129
Epi4K Consortium, and the EPGP Investigators, including Sadleir, L. G. (2017). Ultra-rare genetic variation in common epilepsies: A case-control sequencing study. Lancet Neurology, 16(2), 135-143. doi: 10.1016/S1474-4422(16)30359-3
Winawer, M. R., Shih, J., Beck, E. S., Hunter, J. E., Epstein, M. P., and the EPGP Investigators, including Sadleir, L. (2016). Genetic effects on sleep/wake variation of seizures. Epilepsia, 57(4), 557-565. doi: 10.1111/epi.13330
Ricos, M. G., Hodgson, B. L., Pippucci, T., Saidin, A., Sze, Y., Heron, S. E., … Epilepsy Electroclinical Study Group, including Stanley, T., Sadleir, L., … Dibbens, L. M. (2016). Mutations in the mammalian target of rapamycin pathway regulators NPRL2 and NPRL3 cause focal epilepsy. Annals of Neurology, 79(1), 120-131. doi: 10.1002/ana.24547
Bagnall, R. D., Crompton, D. E., Petrovski, S., Lam, L., Cutmore, C., Garry, S. I., Sadleir, L. G., … Semsarian, C. (2016). Exome-based analysis of cardiac arrhythmia, respiratory control, and epilepsy genes in sudden unexpected death in epilepsy. Annals of Neurology, 79(4), 522-534. doi: 10.1002/ana.24596
Hildebrand, M. S., Griffin, N. G., Damiano, J. A., Cops, E. J., Burgess, R., Ozturk, E., … Sadleir, L. G., … Heinzen, E. L. (2016). Mutations of the sonic hedgehog pathway underlie hypothalamic hamartoma with gelastic epilepsy. American Journal of Human Genetics, 99, 423-429. doi: 10.1016/j.ajhg.2016.05.031
Liu, Y.-C., Lee, J. W. A., Bellows, S. T., Damiano, J. A., Mullen, S. A., Berkovic, S. F., … Clinical Group, including Sadleir, L. G. (2016). Evaluation of non-coding variation in GLUT1 deficiency. Developmental Medicine & Child Neurology, 58(12), 1295-1302. doi: 10.1111/dmcn.13163
Ha, T. T., Sadleir, L. G., Mandelstam, S. A., Paterson, S. J., Scheffer, I. E., Gecz, J., & Corbett, M. A. (2016). A mutation in COL4A2 causes autosomal dominant porencephaly with cataracts. American Journal of Medical Genetics Part A, 170(4), 1059-1063. doi: 10.1002/ajmg.a.37527
Chong, D. J., Dugan, P., and the EPGP Investigators, including Sadleir, L. (2016). Ictal fear: Associations with age, gender, and other experiential phenomena. Epilepsy & Behavior, 62, 153-158. doi: 10.1016/j.yebeh.2016.05.017
Epi4K Consortium, including Sadleir, L. G. (2016). De novo mutations in SLC1A2 and CACNA1A are important causes of epileptic encephalopathies. American Journal of Human Genetics, 99(2), 287-298. doi: 10.1016/j.ajhg.2016.06.003
Leu, C., Balestrini, S., Maher, B., Hernández-Hemández, L., Gormley, P., Hämäläinen, E., … Sadleir, L. G., … Sisodiya, S. M. (2015). Genome-wide polygenic burden of rare deleterious variants in sudden unexpected death in epilepsy. EBioMedicine, 2(9), 1063-1070. doi: 10.1016/j.ebiom.2015.07.005
Sadleir, L. G., Paterson, S., Smith, K. R., Redshaw, N., Ranta, A., Kalnins, R., … Scheffer, I. E. (2015). Myoclonic Occipital Photosensitive Epilepsy with Dystonia (MOPED): A familial epilepsy syndrome. Epilepsy Research, 114, 98-105. doi: 10.1016/j.eplepsyres.2015.04.014
Galizia, E. C., Myers, C. T., Leu, C., de Kovel, C. G. F., Afrikanova, T., Cordero-Maldonado, M. L., … Sadleir, L. G., … Sisodiya, S. M. (2015). CHD2 variants are a risk factor for photosensitivity in epilepsy. Brain, 138(5), 1198-1207. doi: 10.1093/brain/awv052
Tan, C., Shard, C., Ranieri, E., Hynes, K., Pham, D. H., Leach, D., … Sadleir, L., … Gecz, J. (2015). Mutations of protocadherin 19 in female epilepsy (PCDH19-FE) lead to allopregnanolone deficiency. Human Molecular Genetics, 24(18), 5250-5259. doi: 10.1093/hmg/ddv245
McGovern, K., Karn, C. F., Fox, K., and the EPGP Investigators, including Sadleir, L. (2015). Surpassing the target: How a recruitment campaign transformed the participant accrual trajectory in the Epilepsy Phenome/Genome Project. Clinical & Translational Science, 8(5), 518-525. doi: 10.1111/cts.12307
Keenan, N., & Sadleir, L. G. (2015). Paediatric EEG provision in New Zealand: A survey of practice. New Zealand Medical Journal, 128(1411). Retrieved from https://www.nzma.org.nz/journal
Fallil, Z., Pardoe, H., Bachman, R., Cunningham, B., Parulkar, I., Shain, C., … for the EPGP Investigators, including Sadleir, L. (2015). Phenotypic and imaging features of FLNA-negative patients with bilateral periventricular nodular heterotopia and epilepsy. Epilepsy & Behavior, 51, 321-327. doi: 10.1016/j.yebeh.2015.07.041
EuroEPINOMICS-RES Consortium, Epilepsy Phenome/Genome Project, Epi4K Consortium, including Sadleir, L. (2014). De novo mutations in synaptic transmission genes including DNM1 cause epileptic encephalopathies. American Journal of Human Genetics, 95(4), 360-370. doi: 10.1016/j.ajhg.2014.08.013
Keenan, N., Sadleir, L. G., & Wiltshire, E. (2014). Vascular function and risk factors in children with epilepsy: Associations with sodium valproate and carbamazepine. Epilepsy Research, 108(6), 1087-1094. doi: 10.1016/j.eplepsyres.2014.04.006
Carlson, C., Dugan, P., Kirsch, H. E., Friedman, D., and the EPGP Investigators, including Sadleir, L. (2014). Sex differences in seizure types and symptoms. Epilepsy & Behavior, 41, 103-108. doi: 10.1016/j.yebeh.2014.09.051
Dugan, P., Carlson, C., Bluvstein, J., Chong, D. J., Friedman, D., ..., on behalf of the EPGP Investigators, including Sadleir, L. (2014). Auras in generalized epilepsy. Neurology, 83, 1444-1449. doi: 10.1212/WNL.0000000000000877
Carvill, G. L., Weckhuysen, S., McMahon, J. M., Hartmann, C., Møller, R. S., Hjalgrim, H., … Sadleir, L. G., … Mefford, H. C. (2014). GABRA1 and STXBP1: Novel genetic causes of Dravet syndrome. Neurology, 82(14), 1245-1253. doi: 10.1212/wnl.0000000000000291
Nesbitt, G., McKenna, K., Mays, V., Carpenter, A., Miller, K., Williams, M., the EPGP Investigators, including Sadleir, L. (2013). The Epilepsy Phenome/Genome Project (EPGP) informatics platform. International Journal of Medical Informatics, 82(4), 248-259. doi: 10.1016/j.ijmedinf.2012.03.004
Sadleir, L. G., Agher, D., Chabrol, E., Elkouby, L., Leguern, E., Paterson, S. J., Harty, R., … Baulac, S. (2013). Seizure semiology in autosomal dominant epilepsy with auditory features, due to novel LGI1 mutations. Epilepsy Research, 107(3), 311-317. doi: 10.1016/j.eplepsyres.2013.09.008
Friedman, D., Fahlstrom, R., the EPGP Investigators, including Sadleir, L. (2013). Racial and ethnic differences in epilepsy classification among probands in the Epilepsy Phenome/Genome Project (EPGP). Epilepsy Research, 107(3), 306-310. doi: 10.1016/j.eplepsyres.2013.09.007
Carvill, G. L., Regan, B. M., Yendle, S. C., O'Roak, B. J., Lozovaya, N., Bruneau, N., … Sadleir, L. G., … Mefford, H. C. (2013). GRIN2A mutations cause epilepsy-aphasia spectrum disorders. Nature Genetics, 45(9), 1073-1076. doi: 10.1038/ng.2727
Winawer, M. R., Connors, R., and the EPGP Investigators, including Sadleir, L. (2013). Evidence for a shared genetic susceptibility to migraine and epilepsy. Epilepsia, 54(2), 288-295. doi: 10.1111/epi.12072
Carvill, G. L., Heavin, S. B., Yendle, S. C., McMahon, J. M., O'Roak, B. J., Cook, J., … Stanley, T., … Sadleir, L. G., … Mefford, H. C. (2013). Targeted resequencing in epileptic encephalopathies identifies de novo mutations in CHD2 and SYNGAP1. Nature Genetics, 45(7), 825-830. doi: 10.1038/ng.2646
Shain, C., Ramgopal, S., Parulkar, I., Alongi, R., Knowlton, R., Poduri, A., and the EPGP Investigators, including Sadleir, L. (2013). Polymicrogyria-associated epilepsy: A multicenter phenotypic study from the Epilepsy Phenome/Genome Project. Epilepsia, 54(8), 1368-1375. doi: 10.1111/epi.12238
