Lookup NU author(s): Dr Yi Ng,
Professor Doug Turnbull,
Professor Robert Taylor
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Mitochondrial disease is phenotypically and genetically heterogeneous with an estimated prevalence of 1 in 4,300.1 Mutations in the POLG gene, encoding the catalytic subunit of DNA polymerase gamma, are an important cause of mitochondrial disease. The spectrum of clinical manifestations in POLG-related mitochondrial disease is variable,2 with disease onset ranging from adulthood-onset dominant or recessive progressive external ophthalmoplegia (chronic progressive external ophthalmoplegia), ataxia-neuropathy spectrum, myoclonic epilepsy, myopathy, and sensory ataxia to childhood-onset Alpers syndrome, which is characterized by intractable seizures, psychomotor regression, and hepatic impairment. Epilepsy is a poor prognostic factor in POLG mutations,3 and the onset of epilepsy often clusters in childhood (<5 years) and teenage.4 However, late-onset epileptic encephalopathy is uncommon.4,5 Herein, we describe a patient who died of de novo, late-onset refractory status epilepticus with the identification of 2 novel variants in the POLG gene.
Author(s): Ng YS, Powell H, Hoggard N, Turnbull DM, Taylor RW, Hadjivassiliou M
Publication type: Article
Publication status: Published
Journal: Neurology Genetics
Online publication date: 09/08/2017
Acceptance date: 30/06/2017
ISSN (electronic): 2376-7839
Publisher: Wolters Kluwer Health
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