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July 05, 2016; 87 (1) ArticleOpen Access

Novel motor phenotypes in patients with VRK1 mutations without pontocerebellar hypoplasia

Marion Stoll, Hooiling Teoh, James Lee, Stephen Reddel, Ying Zhu, Michael Buckley, Hugo Sampaio, Tony Roscioli, Michelle Farrar, Garth Nicholson
First published June 8, 2016, DOI: https://doi.org/10.1212/WNL.0000000000002813
Marion Stoll
From the Molecular Medicine Laboratory (M.S., G.N.), Neurology Department (J.L.), ANZAC Research Institute (G.N.), and NSW Health Pathology (G.N.), Concord Hospital (S.R.); Departments of Neurology (H.T., H.S., M.F.) and Genetics (T.R.), Sydney Children's Hospital; Discipline of Paediatrics, School of Women's and Children's Health, UNSW Medicine (H.T., H.S., M.F.), and St Vincent's Clinical School (T.R.), The University of New South Wales, Sydney; Kolling Institute (Y.Z.), Royal North Shore Hospital, Newcastle GOLD Service, Hunter Genetics, Waratah; SEALS Haematology and Genetics Laboratory (M.B.), Prince of Wales Hospital, Sydney; Kinghorn Centre for Clinical Genomics (T.R.); and Sydney Medical School (G.N.), University of Sydney, Australia.
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Hooiling Teoh
From the Molecular Medicine Laboratory (M.S., G.N.), Neurology Department (J.L.), ANZAC Research Institute (G.N.), and NSW Health Pathology (G.N.), Concord Hospital (S.R.); Departments of Neurology (H.T., H.S., M.F.) and Genetics (T.R.), Sydney Children's Hospital; Discipline of Paediatrics, School of Women's and Children's Health, UNSW Medicine (H.T., H.S., M.F.), and St Vincent's Clinical School (T.R.), The University of New South Wales, Sydney; Kolling Institute (Y.Z.), Royal North Shore Hospital, Newcastle GOLD Service, Hunter Genetics, Waratah; SEALS Haematology and Genetics Laboratory (M.B.), Prince of Wales Hospital, Sydney; Kinghorn Centre for Clinical Genomics (T.R.); and Sydney Medical School (G.N.), University of Sydney, Australia.
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James Lee
From the Molecular Medicine Laboratory (M.S., G.N.), Neurology Department (J.L.), ANZAC Research Institute (G.N.), and NSW Health Pathology (G.N.), Concord Hospital (S.R.); Departments of Neurology (H.T., H.S., M.F.) and Genetics (T.R.), Sydney Children's Hospital; Discipline of Paediatrics, School of Women's and Children's Health, UNSW Medicine (H.T., H.S., M.F.), and St Vincent's Clinical School (T.R.), The University of New South Wales, Sydney; Kolling Institute (Y.Z.), Royal North Shore Hospital, Newcastle GOLD Service, Hunter Genetics, Waratah; SEALS Haematology and Genetics Laboratory (M.B.), Prince of Wales Hospital, Sydney; Kinghorn Centre for Clinical Genomics (T.R.); and Sydney Medical School (G.N.), University of Sydney, Australia.
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Stephen Reddel
From the Molecular Medicine Laboratory (M.S., G.N.), Neurology Department (J.L.), ANZAC Research Institute (G.N.), and NSW Health Pathology (G.N.), Concord Hospital (S.R.); Departments of Neurology (H.T., H.S., M.F.) and Genetics (T.R.), Sydney Children's Hospital; Discipline of Paediatrics, School of Women's and Children's Health, UNSW Medicine (H.T., H.S., M.F.), and St Vincent's Clinical School (T.R.), The University of New South Wales, Sydney; Kolling Institute (Y.Z.), Royal North Shore Hospital, Newcastle GOLD Service, Hunter Genetics, Waratah; SEALS Haematology and Genetics Laboratory (M.B.), Prince of Wales Hospital, Sydney; Kinghorn Centre for Clinical Genomics (T.R.); and Sydney Medical School (G.N.), University of Sydney, Australia.
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Ying Zhu
From the Molecular Medicine Laboratory (M.S., G.N.), Neurology Department (J.L.), ANZAC Research Institute (G.N.), and NSW Health Pathology (G.N.), Concord Hospital (S.R.); Departments of Neurology (H.T., H.S., M.F.) and Genetics (T.R.), Sydney Children's Hospital; Discipline of Paediatrics, School of Women's and Children's Health, UNSW Medicine (H.T., H.S., M.F.), and St Vincent's Clinical School (T.R.), The University of New South Wales, Sydney; Kolling Institute (Y.Z.), Royal North Shore Hospital, Newcastle GOLD Service, Hunter Genetics, Waratah; SEALS Haematology and Genetics Laboratory (M.B.), Prince of Wales Hospital, Sydney; Kinghorn Centre for Clinical Genomics (T.R.); and Sydney Medical School (G.N.), University of Sydney, Australia.
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Michael Buckley
From the Molecular Medicine Laboratory (M.S., G.N.), Neurology Department (J.L.), ANZAC Research Institute (G.N.), and NSW Health Pathology (G.N.), Concord Hospital (S.R.); Departments of Neurology (H.T., H.S., M.F.) and Genetics (T.R.), Sydney Children's Hospital; Discipline of Paediatrics, School of Women's and Children's Health, UNSW Medicine (H.T., H.S., M.F.), and St Vincent's Clinical School (T.R.), The University of New South Wales, Sydney; Kolling Institute (Y.Z.), Royal North Shore Hospital, Newcastle GOLD Service, Hunter Genetics, Waratah; SEALS Haematology and Genetics Laboratory (M.B.), Prince of Wales Hospital, Sydney; Kinghorn Centre for Clinical Genomics (T.R.); and Sydney Medical School (G.N.), University of Sydney, Australia.
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Hugo Sampaio
From the Molecular Medicine Laboratory (M.S., G.N.), Neurology Department (J.L.), ANZAC Research Institute (G.N.), and NSW Health Pathology (G.N.), Concord Hospital (S.R.); Departments of Neurology (H.T., H.S., M.F.) and Genetics (T.R.), Sydney Children's Hospital; Discipline of Paediatrics, School of Women's and Children's Health, UNSW Medicine (H.T., H.S., M.F.), and St Vincent's Clinical School (T.R.), The University of New South Wales, Sydney; Kolling Institute (Y.Z.), Royal North Shore Hospital, Newcastle GOLD Service, Hunter Genetics, Waratah; SEALS Haematology and Genetics Laboratory (M.B.), Prince of Wales Hospital, Sydney; Kinghorn Centre for Clinical Genomics (T.R.); and Sydney Medical School (G.N.), University of Sydney, Australia.
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Tony Roscioli
From the Molecular Medicine Laboratory (M.S., G.N.), Neurology Department (J.L.), ANZAC Research Institute (G.N.), and NSW Health Pathology (G.N.), Concord Hospital (S.R.); Departments of Neurology (H.T., H.S., M.F.) and Genetics (T.R.), Sydney Children's Hospital; Discipline of Paediatrics, School of Women's and Children's Health, UNSW Medicine (H.T., H.S., M.F.), and St Vincent's Clinical School (T.R.), The University of New South Wales, Sydney; Kolling Institute (Y.Z.), Royal North Shore Hospital, Newcastle GOLD Service, Hunter Genetics, Waratah; SEALS Haematology and Genetics Laboratory (M.B.), Prince of Wales Hospital, Sydney; Kinghorn Centre for Clinical Genomics (T.R.); and Sydney Medical School (G.N.), University of Sydney, Australia.
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Michelle Farrar
From the Molecular Medicine Laboratory (M.S., G.N.), Neurology Department (J.L.), ANZAC Research Institute (G.N.), and NSW Health Pathology (G.N.), Concord Hospital (S.R.); Departments of Neurology (H.T., H.S., M.F.) and Genetics (T.R.), Sydney Children's Hospital; Discipline of Paediatrics, School of Women's and Children's Health, UNSW Medicine (H.T., H.S., M.F.), and St Vincent's Clinical School (T.R.), The University of New South Wales, Sydney; Kolling Institute (Y.Z.), Royal North Shore Hospital, Newcastle GOLD Service, Hunter Genetics, Waratah; SEALS Haematology and Genetics Laboratory (M.B.), Prince of Wales Hospital, Sydney; Kinghorn Centre for Clinical Genomics (T.R.); and Sydney Medical School (G.N.), University of Sydney, Australia.
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Garth Nicholson
From the Molecular Medicine Laboratory (M.S., G.N.), Neurology Department (J.L.), ANZAC Research Institute (G.N.), and NSW Health Pathology (G.N.), Concord Hospital (S.R.); Departments of Neurology (H.T., H.S., M.F.) and Genetics (T.R.), Sydney Children's Hospital; Discipline of Paediatrics, School of Women's and Children's Health, UNSW Medicine (H.T., H.S., M.F.), and St Vincent's Clinical School (T.R.), The University of New South Wales, Sydney; Kolling Institute (Y.Z.), Royal North Shore Hospital, Newcastle GOLD Service, Hunter Genetics, Waratah; SEALS Haematology and Genetics Laboratory (M.B.), Prince of Wales Hospital, Sydney; Kinghorn Centre for Clinical Genomics (T.R.); and Sydney Medical School (G.N.), University of Sydney, Australia.
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Citation
Novel motor phenotypes in patients with VRK1 mutations without pontocerebellar hypoplasia
Marion Stoll, Hooiling Teoh, James Lee, Stephen Reddel, Ying Zhu, Michael Buckley, Hugo Sampaio, Tony Roscioli, Michelle Farrar, Garth Nicholson
Neurology Jul 2016, 87 (1) 65-70; DOI: 10.1212/WNL.0000000000002813

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Abstract

Objective: To describe the phenotypes in 2 families with vaccinia-related kinase 1 (VRK1) mutations including one novel VRK1 mutation.

Methods: VRK1 mutations were found by whole exome sequencing in patients presenting with motor neuron disorders.

Results: We identified pathogenic mutations in the VRK1 gene in the affected members of 2 families. In family 1, compound heterozygous mutations were identified in VRK1, c.356A>G; p.H119R, and c.1072C>T; p.R358*, in 2 siblings with adult onset distal spinal muscular atrophy (SMA). In family 2, a novel VRK1 mutation, c.403G>A; p.G135R and c.583T>G; p.L195V, were identified in a child with motor neuron disease.

Conclusions: VRK1 mutations can produce adult-onset SMA and motor neuron disease in children without pontocerebellar hypoplasia.

GLOSSARY

ALS=
amyotrophic lateral sclerosis;
dHMN + PS=
distal hereditary motor neuronopathy and pyramidal tract signs;
SMA=
spinal muscular atrophies;
WES=
whole exome sequencing

Footnotes

  • Go to Neurology.org for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article. The Article Processing charge was paid by the authors.

  • ↵* These authors contributed equally to this work.

  • ↵‡ These authors are co–senior authors.

  • Received January 3, 2016.
  • Accepted in final form March 17, 2016.
  • © 2016 American Academy of Neurology

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND), which permits downloading and sharing the work provided it is properly cited. The work cannot be changed in any way or used commercially.

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