Abstract
Mutations in the coiled-coil-helix-coiled-coil-helix domain-containing protein 10 gene (CHCHD10), involved in mitochondrial function, have recently been reported as a causative gene of amyotrophic lateral sclerosis (ALS). The aim of this study was to obtain the mutation prevalence of CHCHD10 and the phenotypes with mutations in Chinese ALS patients. A cohort of 499 ALS patients including 487 sporadic ALS (SALS) and 12 familial ALS (FALS), from the Department of Neurology, West China Hospital of Sichuan University, were screened for mutations of all exons of the CHCHD10 gene by Sanger sequencing. Novel candidate mutations or variants were confirmed by polymerase chain reaction-restriction fragment length polymorphism in 466 healthy individuals. All patients identified with mutations of CHCHD10 gene were screened for mutations of the common ALS causative genes including C9orf72, SOD1, TARDBP, FUS, PFN1, and SQSTM1. Three heterozygous variants, including two missense mutations (c.275A > G (p.Y92C) and c.306G > C (p.Q102H)) and a synonymous change c.306G > A (p.Q102Q), were found in exon 3 of CHCHD10 in three alive SALS individuals (with the longest disease duration of 8.6 years), all of which were not detected in healthy controls. No mutation in CHCHD10 was identified in FALS patients. No mutation was found in the aforementioned common ALS causative genes in the patients who carried CHCHD10 mutations. The mutation frequency of CHCHD10 (0.4 %, 2/487) in a Chinese SALS population suggests CHCHD10 gene mutation appears to be an uncommon cause of ALS in Chinese populations. CHCHD10 mutations are associated with a slow progression and long disease duration.
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Acknowledgments
The authors appreciate all cohort individuals and their families for their participation in this study. The present study was supported by the funding of the National Science Fund of China (grant no. 81371394 and no.81511140101) and the Science and Technology Bureau Fund of Sichuan Province (2014FZ0072).
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All participants were informed before enrolment and given a written informed consent form for the study under a protocol approved by the Ethics Committee of West China Hospital of Sichuan University.
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QingQing Zhou and YongPing Chen contributed equally to this work.
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Zhou, Q., Chen, Y., Wei, Q. et al. Mutation Screening of the CHCHD10 Gene in Chinese Patients with Amyotrophic Lateral Sclerosis. Mol Neurobiol 54, 3189–3194 (2017). https://doi.org/10.1007/s12035-016-9888-0
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DOI: https://doi.org/10.1007/s12035-016-9888-0