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https://www.readbyqxmd.com/read/29154141/novel-genes-associated-with-amyotrophic-lateral-sclerosis-diagnostic-and-clinical-implications
#1
REVIEW
Ruth Chia, Adriano Chiò, Bryan J Traynor
BACKGROUND: The disease course of amyotrophic lateral sclerosis (ALS) is rapid and, because its pathophysiology is unclear, few effective treatments are available. Genetic research aims to understand the underlying mechanisms of ALS and identify potential therapeutic targets. The first gene associated with ALS was SOD1, identified in 1993 and, by early 2014, more than 20 genes had been identified as causative of, or highly associated with, ALS. These genetic discoveries have identified key disease pathways that are therapeutically testable and could potentially lead to the development of better treatments for people with ALS...
November 16, 2017: Lancet Neurology
https://www.readbyqxmd.com/read/29121267/loss-of-chchd10-chchd2-complexes-required-for-respiration-underlies-the-pathogenicity-of-a-chchd10-mutation-in-als
#2
Isabella R Straub, Alexander Janer, Woranontee Weraarpachai, Lorne Zinman, Janice Robertson, Ekaterina Rogaeva, Eric A Shoubridge
CHCHD10 and its paralogue CHCHD2 belong to a family of twin CX9C motif proteins, most of which localize to the intermembrane space of mitochondria. Dominant mutations in CHCHD10 cause amyotrophic lateral sclerosis/frontotemporal dementia (ALS/FTD), and mutations in CHCHD2 have been associated with Parkinson's disease, but the function of these proteins remains unknown. Here we show that the p.R15L CHCHD10 variant in ALS patient fibroblasts destabilizes the protein, leading to a defect in the assembly of complex I, impaired cellular respiration, mitochondrial hyperfusion, an increase in the steady-state level of CHCHD2, and a severe proliferation defect on galactose, a substrate that forces cells to synthesize virtually all of their ATP aerobically...
November 7, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29112723/in-vitro-and-in-vivo-studies-of-the-als-ftld-protein-chchd10-reveal-novel-mitochondrial-topology-and-protein-interactions
#3
S R Burstein, F Valsecchi, H Kawamata, M Bourens, R Zeng, A Zuberi, T A Milner, S M Cloonan, C Lutz, A Barrientos, G Manfredi
Mutations in coiled-coil-helix-coiled-coil-helix-domain containing 10 (CHCHD10), a mitochondrial twin CX9C protein whose function is still unknown, cause myopathy, motor neuron disease, frontotemporal dementia, and Parkinson's disease. Here, we investigate CHCHD10 topology and its protein interactome, as well as the effects of CHCHD10 depletion or expression of disease-associated mutations in wild-type cells. We find that CHCHD10 associates with membranes in the mitochondrial intermembrane space, where it interacts with a closely related protein, CHCHD2...
November 3, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29102476/investigating-ccnf-mutations-in-a-taiwanese-cohort-with-amyotrophic-lateral-sclerosis
#4
Pei-Chien Tsai, Yi-Chu Liao, Po-Lin Chen, Yuh-Cherng Guo, Ying-Hao Chen, Kang-Yang Jih, Kon-Ping Lin, Bing-Wen Soong, Ching-Paio Tsai, Yi-Chung Lee
Mutations in the cyclin F gene (CCNF) have been recently identified in a small number of patients with amyotrophic lateral sclerosis (ALS) and/or frontotemporal dementia, and their role in patients with ALS in Taiwan remains elusive. The aim of this study was to elucidate the frequency and spectrum of CCNF mutations in a Taiwanese ALS cohort of Han Chinese origin. Mutational analyses of the CCNF gene were performed using Sanger sequencing in a cohort of 255 unrelated patients with ALS. Among these patients, the genetic diagnoses of 204 patients remained unclear after mutations in SOD1, C9ORF72, TARDBP, FUS, ATXN2, OPTN, VCP, UBQLN2, SQSTM1, PFN1, HNRNPA1, HNRNPA2B1, MATR3, CHCHD10, TUBA4A, and TKB1 had been investigated...
October 9, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29029963/genetic-risk-factors-in-finnish-patients-with-parkinson-s-disease
#5
Susanna Ylönen, Ari Siitonen, Michael A Nalls, Pauli Ylikotila, Jaana Autere, Johanna Eerola-Rautio, Raphael Gibbs, Mikko Hiltunen, Pentti J Tienari, Hilkka Soininen, Andrew B Singleton, Kari Majamaa
INTRODUCTION: Variation contributing to the risk of Parkinson's disease (PD) has been identified in several genes and at several loci including GBA, SMPD1, LRRK2, POLG1, CHCHD10 and MAPT, but the frequencies of risk variants seem to vary according to ethnic background. Our aim was to analyze how variation in these genes contributes to PD in the Finnish population. METHODS: The subjects consisted of 527 Finnish patients with early-onset PD, 325 patients with late-onset PD and 403 population controls...
September 29, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28749476/the-wide-genetic-landscape-of-clinical-frontotemporal-dementia-systematic-combined-sequencing-of-121-consecutive-subjects
#6
Cornelis Blauwendraat, Carlo Wilke, Javier Simón-Sánchez, Iris E Jansen, Anika Reifschneider, Anja Capell, Christian Haass, Melissa Castillo-Lizardo, Saskia Biskup, Walter Maetzler, Patrizia Rizzu, Peter Heutink, Matthis Synofzik
PurposeTo define the genetic spectrum and relative gene frequencies underlying clinical frontotemporal dementia (FTD).MethodsWe investigated the frequencies and mutations in neurodegenerative disease genes in 121 consecutive FTD subjects using an unbiased, combined sequencing approach, complemented by cerebrospinal fluid Aβ1-42 and serum progranulin measurements. Subjects were screened for C9orf72 repeat expansions, GRN and MAPT mutations, and, if negative, mutations in other neurodegenerative disease genes, by whole-exome sequencing (WES) (n = 108), including WES-based copy-number variant (CNV) analysis...
July 27, 2017: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/28685009/mnrr1-a-biorganellar-regulator-of-mitochondria
#7
REVIEW
Lawrence I Grossman, Neeraja Purandare, Rooshan Arshad, Stephanie Gladyck, Mallika Somayajulu, Maik Hüttemann, Siddhesh Aras
The central role of energy metabolism in cellular activities is becoming widely recognized. However, there are many gaps in our knowledge of the mechanisms by which mitochondria evaluate their status and call upon the nucleus to make adjustments. Recently, a protein family consisting of twin CX9C proteins has been shown to play a role in human pathophysiology. We focus here on two family members, the isoforms CHCHD2 (renamed MNRR1) and CHCHD10. The better studied isoform, MNRR1, has the unusual property of functioning in both the mitochondria and the nucleus and of having a different function in each...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28585542/loss-of-function-chchd10-mutations-in-cytoplasmic-tdp-43-accumulation-and-synaptic-integrity
#8
Jung-A A Woo, Tian Liu, Courtney Trotter, Cenxiao C Fang, Emillio De Narvaez, Patrick LePochat, Drew Maslar, Anusha Bukhari, Xingyu Zhao, Andrew Deonarine, Sandy D Westerheide, David E Kang
Although multiple CHCHD10 mutations are associated with the spectrum of familial and sporadic frontotemporal dementia-amyotrophic lateral sclerosis (FTD-ALS) diseases, neither the normal function of endogenous CHCHD10 nor its role in the pathological milieu (that is, TDP-43 pathology) of FTD/ALS have been investigated. In this study, we made a series of observations utilizing Caenorhabditis elegans models, mammalian cell lines, primary neurons and mouse brains, demonstrating that CHCHD10 normally exerts a protective role in mitochondrial and synaptic integrity as well as in the retention of nuclear TDP-43, whereas FTD/ALS-associated mutations (R15L and S59L) exhibit loss of function phenotypes in C...
June 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/28573364/-genetic-architecture-of-amyotrophic-lateral-sclerosis-and-frontotemporal-dementia-overlap-and-differences
#9
REVIEW
M Synofzik, M Otto, A Ludolph, J H Weishaupt
Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) overlap not only clinically, but also with respect to shared neuropathology and genes. A large number of novel genes has recently been identified which underlie both diseases, e. g., C9orf72, TARDBP, GRN, TBK1, UBQLN2, VCP, CHCHD10, or SQSTM1. In contrast, other genes are still largely associated with only one of the two diseases, e. g., SOD1 with ALS or MAPT with FTD. These genetic findings indicate a large number of shared mechanisms, yet along with still a certain cell-specific vulnerability...
July 2017: Der Nervenarzt
https://www.readbyqxmd.com/read/28462717/genetic-features-of-mapt-grn-c9orf72-and-chchd10-gene-mutations-in-chinese-patients-with-frontotemporal-dementia
#10
Xiang-Qian Che, Qian-Hua Zhao, Yue Huang, Xia Li, Ru-Jing Ren, Sheng-Di Chen, Gang Wang, Qi-Hao Guo
Mutations in microtubule associated protein tau (MAPT), progranulin (GRN), chromosome 9 open-reading frame 72 (C9orf72) and CHCHD10 genes have been reported causing frontotemporal dementia (FTD) in different populations. However, collective analysis of mutations in these four genes in Chinese FTD patients has not been reported yet. The aim of this study was to investigate the geneticfeatures of Chinese patients with MAPT, PGRN, C9orf72 or CHCHD10 gene mutations in a FTD cohort recruited from multi clinical centers in Shanghai metropolitan areas, China...
April 25, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28456383/adult-onset-spinal-muscular-atrophy-an-update
#11
REVIEW
R Juntas Morales, N Pageot, G Taieb, W Camu
Spinal muscular atrophy (SMA) refers to a group of disorders affecting lower motor neurons. The age of onset of these disorders is variable, ranging from the neonatal period to adulthood. Over the last few years, there has been enormous progress in the description of new genes and phenotypes that throw new light on the molecular pathways involved in motor neuron degeneration. Advances in our understanding of the pathophysiology of the most frequent forms, SMA linked to SMN1 gene mutations and Kennedy disease, has led to the development of therapeutic strategies currently being tested in clinical trials...
April 26, 2017: Revue Neurologique
https://www.readbyqxmd.com/read/28380318/recent-advances-in-the-molecular-genetics-of-frontotemporal-lobar-degeneration
#12
REVIEW
Innocenzo Rainero, E Rubino, A Michelerio, F D'Agata, Salvatore Gentile, Lorenzo Pinessi
The term frontotemporal lobar degeneration (FTLD) describes a spectrum of neurodegenerative disorders associated with deposition of misfolded proteins in the frontal and temporal lobes. Up to 40% of FTLD patients reports a family history of neurodegeneration, and approximately 1/3 of familial cases shows an autosomal dominant pattern of inheritance of the phenotype. Over the past two decades, several causative and susceptibility genes for FTLD have been discovered, supporting the notion that genetic factors are important contributors to the disease processes...
January 2017: Functional Neurology
https://www.readbyqxmd.com/read/28318595/chchd10-mutations-in-patients-with-amyotrophic-lateral-sclerosis-in-mainland-china
#13
Shen Shen, Ji He, Lu Tang, Nan Zhang, Dongsheng Fan
Many genes have been found to be pathogenic for amyotrophic lateral sclerosis (ALS). Among them, the coiled-coil-helix-coiled-coil-helix domain containing 10 (CHCHD10) has been reported to play a controversial role in ALS. We examined the coding region of this gene in 424 unrelated Chinese sporadic ALS subjects, 73 familial ALS subjects, and 204 healthy controls using a polymerase chain reaction-direct sequencing strategy. Two types of variants were identified, and of these, one variant (g.877C>T, p.P23L) was identified to be damaging, and the other one was (g...
June 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28108040/genetic-analysis-of-chchd2-and-chchd10-in-italian-patients-with-parkinson-s-disease
#14
Elisa Rubino, Livia Brusa, Ming Zhang, Silvia Boschi, Flora Govone, Alessandro Vacca, Annalisa Gai, Lorenzo Pinessi, Leonardo Lopiano, Ekaterina Rogaeva, Innocenzo Rainero
In recent years, CHCHD2 and CHCHD10 mutations were reported to be associated with a broad spectrum of neurodegenerative diseases, including Parkinson's disease (PD), although with conflicting results in different populations. The present study aimed to evaluate CHCHD2 and CHCHD10 coding variants in Italian patients with PD. All the coding regions and flanking intronic splice sites of CHCHD2 and CHCHD10 were sequenced. None of our 119 PD cases carried CHCHD2 mutations, whereas 1 sporadic PD patient showed the Pro34Ser substitution in CHCHD10...
May 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28069311/investigating-the-role-of-als-genes-chchd10-and-tuba4a-in-belgian-ftd-als-spectrum-patients
#15
Federica Perrone, Hung Phuoc Nguyen, Sara Van Mossevelde, Matthieu Moisse, Anne Sieben, Patrick Santens, Jan De Bleecker, Mathieu Vandenbulcke, Sebastiaan Engelborghs, Jonathan Baets, Patrick Cras, Rik Vandenberghe, Peter De Jonghe, Peter P De Deyn, Jean-Jacques Martin, Philip Van Damme, Christine Van Broeckhoven, Julie van der Zee
Mutation screening and phenotypic profiling of 2 amyotrophic lateral sclerosis-(ALS) and frontotemporal dementia-(FTD) associated genes, CHCHD10 and TUBA4A, were performed in a Belgian cohort of 459 FTD, 28 FTD-ALS, and 429 ALS patients. In CHCHD10, we identified a novel nonsense mutation (p.Gln108*) in a patient with atypical clinical FTD and pathology-confirmed Parkinson's disease (1/459, 0.22%) leading to loss of transcript. We further observed 3 previously described missense variants (p.Pro34Ser, p.Pro80Leu, and p...
March 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/27810918/chchd10-mutations-and-motor-neuron-disease-the-distribution-in-finnish-patients
#16
Sini Penttilä, Manu Jokela, Anna Maija Saukkonen, Jari Toivanen, Johanna Palmio, Janne Lähdesmäki, Satu Sandell, Mariia Shcherbii, Mari Auranen, Emil Ylikallio, Henna Tyynismaa, Bjarne Udd
No abstract text is available yet for this article.
March 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/27631878/mitochondrial-chchd-containing-proteins-physiologic-functions-and-link-with-neurodegenerative-diseases
#17
REVIEW
Zhi-Dong Zhou, Wuan-Ting Saw, Eng-King Tan
The coiled-coil-helix-coiled-coil-helix domain (CHCHD)-containing proteins are evolutionarily conserved nucleus-encoded small mitochondrial proteins with important functions. So far, nine members have been identified in this protein family. All CHCHD proteins have at least one functional coiled-coil-helix-coiled-coil-helix (CHCH) domain, which is stabilized by two pairs of disulfide bonds between two helices. CHCHD proteins have various important pathophysiological roles in mitochondria and other key cellular processes...
September 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/27578015/identification-of-chchd10-mutation-in-chinese-patients-with-alzheimer-disease
#18
Tingting Xiao, Bin Jiao, Weiwei Zhang, Chuzheng Pan, Jingya Wei, Xiaoyan Liu, Yafang Zhou, Lin Zhou, Beisha Tang, Lu Shen
CHCHD10 gene has been identified to be associated with frontotemporal dementia (FTD) and amyotrophic lateral sclerosis (ALS). Considering the clinical phenotype and pathology characterization were overlapped between FTD and Alzheimer disease (AD), and so far, no systematic analysis of CHCHD10 mutation was conducted in patients with AD in Asian population. Therefore, we screened of all exons in CHCHD10 in a cohort of 484 AD patients (60 with family history) from Mainland China. A heterozygous variant p.A35D (c...
September 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/27538057/amyotrophic-lateral-sclerosis-recent-genetic-highlights
#19
Matthew A White, Jemeen Sreedharan
PURPOSE OF REVIEW: Amyotrophic lateral sclerosis (ALS), like other neurodegenerative diseases, remains incurable, but gene mutations linked to ALS are providing clues as to how to target therapies. It is important for researchers to keep abreast of the rapid influx of new data in ALS, and we aim to summarize the major genetic advances made in the field over the past 2 years. RECENT FINDINGS: Significant variation in seven genes has recently been found in ALS: TBK1, CCNF, GLE1, MATR3, TUBA4A, CHCHD10 and NEK1...
October 2016: Current Opinion in Neurology
https://www.readbyqxmd.com/read/27095681/genetic-analysis-of-chchd10-in-french-familial-amyotrophic-lateral-sclerosis-patients
#20
Elisa Teyssou, Laura Chartier, Mélanie Albert, Alexandra Bouscary, Jean-Christophe Antoine, Jean-Philippe Camdessanché, Francesco Rotolo, Philippe Couratier, François Salachas, Danielle Seilhean, Stéphanie Millecamps
Mutations in CHCHD10 have been reported as the cause of a large panel of neurologic disorders. To confirm the contribution of this gene to amyotrophic lateral sclerosis (ALS) disease, we analyzed the 4 coding exons of CHCHD10 by Sanger sequencing in a cohort of 118 French familial ALS already excluded for all known ALS-related genes. We did not find any pathogenic mutation suggesting that CHCHD10 is not a major genetic cause of familial ALS, in France.
June 2016: Neurobiology of Aging
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