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Neurology Genetics
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October 2018; 4 (5) ArticleOpen Access

Early-onset Parkinson disease caused by a mutation in CHCHD2 and mitochondrial dysfunction

Richard G. Lee, Maryam Sedghi, Mehri Salari, Anne-Marie J. Shearwood, Maike Stentenbach, Ariana Kariminejad, Hayley Goullee, Oliver Rackham, Nigel G. Laing, Homa Tajsharghi, Aleksandra Filipovska
First published October 5, 2018, DOI: https://doi.org/10.1212/NXG.0000000000000276
Richard G. Lee
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Maryam Sedghi
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Mehri Salari
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Anne-Marie J. Shearwood
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Maike Stentenbach
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Ariana Kariminejad
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Hayley Goullee
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Oliver Rackham
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Nigel G. Laing
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Homa Tajsharghi
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Aleksandra Filipovska
From the Centre for Medical Research (R.G.L., A.-M.J.S., M. Stentenbach, H.G., O.R., N.G.L., H.T., A.F.), University of Western Australia and the Harry Perkins Institute for Medical Research, Nedlands, Western Australia, Australia; Department of Genetics (M. Sedghi), University of Isfahan, Isfahan; Functional Neurosurgery Research Center (M. Salari), Shohada Tajrish Neurosurgical Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Kariminejad-Najmabadi Pathology and Genetics Center (A.K.), Tehran, Iran; School of Molecular Sciences (O.R., A.F.), The University of Western Australia, Crawley; Department of Diagnostic Genomics (N.G.L.), PathWest, QEII Medical Centre, Nedlands, Western Australia, Australia; and Division Biomedicine and Public Health (H.T.), School of Health and Education, University of Skovde, Sweden.
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Citation
Early-onset Parkinson disease caused by a mutation in CHCHD2 and mitochondrial dysfunction
Richard G. Lee, Maryam Sedghi, Mehri Salari, Anne-Marie J. Shearwood, Maike Stentenbach, Ariana Kariminejad, Hayley Goullee, Oliver Rackham, Nigel G. Laing, Homa Tajsharghi, Aleksandra Filipovska
Neurol Genet Oct 2018, 4 (5) e276; DOI: 10.1212/NXG.0000000000000276

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Abstract

Objective Our goal was to identify the gene(s) associated with an early-onset form of Parkinson disease (PD) and the molecular defects associated with this mutation.

Methods We combined whole-exome sequencing and functional genomics to identify the genes associated with early-onset PD. We used fluorescence microscopy, cell, and mitochondrial biology measurements to identify the molecular defects resulting from the identified mutation.

Results Here, we report an association of a homozygous variant in CHCHD2, encoding coiled-coil-helix-coiled-coil-helix domain containing protein 2, a mitochondrial protein of unknown function, with an early-onset form of PD in a 26-year-old Caucasian woman. The CHCHD2 mutation in PD patient fibroblasts causes fragmentation of the mitochondrial reticular morphology and results in reduced oxidative phosphorylation at complex I and complex IV. Although patient cells could maintain a proton motive force, reactive oxygen species production was increased, which correlated with an increased metabolic rate.

Conclusions Our findings implicate CHCHD2 in the pathogenesis of recessive early-onset PD, expanding the repertoire of mitochondrial proteins that play a direct role in this disease.

Glossary

BCA=
Bicinchoninic acid;
DHE=
dihydroethidium;
ETC=
electron transport chain;
MICOS=
mitochondrial contact site and cristae organizing system;
NGS=
next-generation sequencing;
OXPHOS=
oxidative phosphorylation;
PBS=
phosphate-buffered saline;
PD=
Parkinson disease;
RCR=
respiratory control ratio;
ROS=
reactive oxygen species;
WES=
whole-exome sequencing

Footnotes

  • ↵* These authors contributed equally to the study and share first authorship.

  • ↵§ These authors share senior authorship and are co-corresponding authors.

  • Funding information and disclosures are provided at the end of the article. Full disclosure form information provided by the authors is available with the full text of this article at Neurology.org/NG.

  • The Article Processing Charge was funded by the Australian Research Council.

  • Received February 28, 2018.
  • Accepted in final form June 18, 2018.
  • Copyright © 2018 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the 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 without permission from the journal.

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