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1. Microglia in frontotemporal lobar degeneration with progranulin or C9ORF72 mutations.

Author

Sakae N, Roemer SF, Bieniek KF, Murray ME, Baker MC, Kasanuki K, Graff-Radford NR, Petrucelli L, Van Blitterswijk M, Rademakers R, and Dickson DW

Subjects
Aged, Aged, 80 and over, Brain metabolism, Female, Frontotemporal Lobar Degeneration genetics, Frontotemporal Lobar Degeneration metabolism, Humans, Male, Microglia metabolism, Middle Aged, Neurofibrillary Tangles metabolism, Neurofibrillary Tangles pathology, tau Proteins metabolism, Brain pathology, C9orf72 Protein genetics, Frontotemporal Lobar Degeneration pathology, Microglia pathology, Mutation, Progranulins genetics
Abstract

Objective: To identify clinicopathological differences between frontotemporal lobar degeneration (FTLD) due to mutations in progranulin (FTLD-GRN) and chromosome 9 open reading frame 72 (FTLD-C9ORF72)., Methods: We performed quantitative neuropathologic comparison of 17 FTLD-C9ORF72 and 15 FTLD-GRN with a focus on microglia. For clinical comparisons, only cases with high quality medical documentation and concurring diagnoses by at least two neurologists were included (14 FTLD-GRN and 13 FTLD-C9ORF72). Neuropathological analyses were limited to TDP-43 Type A to assure consistent assessment between the groups, acknowledging that Type A is a minority of C9ORF72 patients. Furthermore, only cases with sufficient tissue from all regions were studied (11 FTLD-GRN and 11 FTLD-C9ORF72). FTLD cases were also compared to age- and sex-matched normal controls. Immunohistochemistry was performed for pTDP-43, IBA-1, CD68, and GFAP. Morphological characterization of microglia was performed in sections of cortex blinded to clinical and genetic information., Results: FTLD-GRN patients had frequent asymmetric clinical features, including aphasia and apraxia, as well as more asymmetric cortical atrophy. Neuropathologically, FTLD-C9ORF72 had greater hippocampal tau pathology and more TDP-43 neuronal cytoplasmic inclusions. FTLD-GRN had more neocortical microvacuolation, as well as more IBA-1-positive ameboid microglia in superficial cortical layers and in subcortical white matter. FTLD-GRN also had more microglia with nuclear condensation, possibly indicating apoptosis. Microglial morphology with CD68 immunohistochemistry in FTLD-GRN and FTLD-C9ORF72 differed from controls., Interpretation: Our findings underscore differences in microglial response in FTLD-C9ORF72 and FTLD-GRN as shown by significant differences in ameboid microglia in gray and white matter. These results suggest the differential contribution of microglial dysfunction in FTLD-GRN and FTLD-C9ORF72 and suggest that clinical, neuroimaging and pathologic differences could in part be related to differences in microglia response., (© 2019 The Authors. Annals of Clinical and Translational Neurology published by Wiley Periodicals, Inc on behalf of American Neurological Association.)

Published
2019
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2. Potential genetic modifiers of disease risk and age at onset in patients with frontotemporal lobar degeneration and GRN mutations: a genome-wide association study.

Author

Pottier C, Zhou X, Perkerson RB 3rd, Baker M, Jenkins GD, Serie DJ, Ghidoni R, Benussi L, Binetti G, López de Munain A, Zulaica M, Moreno F, Le Ber I, Pasquier F, Hannequin D, Sánchez-Valle R, Antonell A, Lladó A, Parsons TM, Finch NA, Finger EC, Lippa CF, Huey ED, Neumann M, Heutink P, Synofzik M, Wilke C, Rissman RA, Slawek J, Sitek E, Johannsen P, Nielsen JE, Ren Y, van Blitterswijk M, DeJesus-Hernandez M, Christopher E, Murray ME, Bieniek KF, Evers BM, Ferrari C, Rollinson S, Richardson A, Scarpini E, Fumagalli GG, Padovani A, Hardy J, Momeni P, Ferrari R, Frangipane F, Maletta R, Anfossi M, Gallo M, Petrucelli L, Suh E, Lopez OL, Wong TH, van Rooij JGJ, Seelaar H, Mead S, Caselli RJ, Reiman EM, Noel Sabbagh M, Kjolby M, Nykjaer A, Karydas AM, Boxer AL, Grinberg LT, Grafman J, Spina S, Oblak A, Mesulam MM, Weintraub S, Geula C, Hodges JR, Piguet O, Brooks WS, Irwin DJ, Trojanowski JQ, Lee EB, Josephs KA, Parisi JE, Ertekin-Taner N, Knopman DS, Nacmias B, Piaceri I, Bagnoli S, Sorbi S, Gearing M, Glass J, Beach TG, Black SE, Masellis M, Rogaeva E, Vonsattel JP, Honig LS, Kofler J, Bruni AC, Snowden J, Mann D, Pickering-Brown S, Diehl-Schmid J, Winkelmann J, Galimberti D, Graff C, Öijerstedt L, Troakes C, Al-Sarraj S, Cruchaga C, Cairns NJ, Rohrer JD, Halliday GM, Kwok JB, van Swieten JC, White CL 3rd, Ghetti B, Murell JR, Mackenzie IRA, Hsiung GR, Borroni B, Rossi G, Tagliavini F, Wszolek ZK, Petersen RC, Bigio EH, Grossman M, Van Deerlin VM, Seeley WW, Miller BL, Graff-Radford NR, Boeve BF, Dickson DW, Biernacka JM, and Rademakers R

Subjects
Age of Onset, Aged, Case-Control Studies, Cerebellum metabolism, Female, Frontotemporal Lobar Degeneration metabolism, Genome-Wide Association Study, Glial Cell Line-Derived Neurotrophic Factor Receptors metabolism, Humans, Male, Middle Aged, Progranulins metabolism, RNA, Messenger metabolism, Frontotemporal Lobar Degeneration genetics, Genetic Predisposition to Disease genetics, Glial Cell Line-Derived Neurotrophic Factor Receptors genetics, Mutation genetics, Progranulins genetics
Abstract

Background: Loss-of-function mutations in GRN cause frontotemporal lobar degeneration (FTLD). Patients with GRN mutations present with a uniform subtype of TAR DNA-binding protein 43 (TDP-43) pathology at autopsy (FTLD-TDP type A); however, age at onset and clinical presentation are variable, even within families. We aimed to identify potential genetic modifiers of disease onset and disease risk in GRN mutation carriers., Methods: The study was done in three stages: a discovery stage, a replication stage, and a meta-analysis of the discovery and replication data. In the discovery stage, genome-wide logistic and linear regression analyses were done to test the association of genetic variants with disease risk (case or control status) and age at onset in patients with a GRN mutation and controls free of neurodegenerative disorders. Suggestive loci (p<1 × 10 -5 ) were genotyped in a replication cohort of patients and controls, followed by a meta-analysis. The effect of genome-wide significant variants at the GFRA2 locus on expression of GFRA2 was assessed using mRNA expression studies in cerebellar tissue samples from the Mayo Clinic brain bank. The effect of the GFRA2 locus on progranulin concentrations was studied using previously generated ELISA-based expression data. Co-immunoprecipitation experiments in HEK293T cells were done to test for a direct interaction between GFRA2 and progranulin., Findings: Individuals were enrolled in the current study between Sept 16, 2014, and Oct 5, 2017. After quality control measures, statistical analyses in the discovery stage included 382 unrelated symptomatic GRN mutation carriers and 1146 controls free of neurodegenerative disorders collected from 34 research centres located in the USA, Canada, Australia, and Europe. In the replication stage, 210 patients (67 symptomatic GRN mutation carriers and 143 patients with FTLD without GRN mutations pathologically confirmed as FTLD-TDP type A) and 1798 controls free of neurodegenerative diseases were recruited from 26 sites, 20 of which overlapped with the discovery stage. No genome-wide significant association with age at onset was identified in the discovery or replication stages, or in the meta-analysis. However, in the case-control analysis, we replicated the previously reported TMEM106B association (rs1990622 meta-analysis odds ratio [OR] 0·54, 95% CI 0·46-0·63; p=3·54 × 10 -16 ), and identified a novel genome-wide significant locus at GFRA2 on chromosome 8p21.3 associated with disease risk (rs36196656 meta-analysis OR 1·49, 95% CI 1·30-1·71; p=1·58 × 10 -8 ). Expression analyses showed that the risk-associated allele at rs36196656 decreased GFRA2 mRNA concentrations in cerebellar tissue (p=0·04). No effect of rs36196656 on plasma and CSF progranulin concentrations was detected by ELISA; however, co-immunoprecipitation experiments in HEK293T cells did suggest a direct binding of progranulin and GFRA2., Interpretation: TMEM106B-related and GFRA2-related pathways might be future targets for treatments for FTLD, but the biological interaction between progranulin and these potential disease modifiers requires further study. TMEM106B and GFRA2 might also provide opportunities to select and stratify patients for future clinical trials and, when more is known about their potential effects, to inform genetic counselling, especially for asymptomatic individuals., Funding: National Institute on Aging, National Institute of Neurological Disorders and Stroke, Canadian Institutes of Health Research, Italian Ministry of Health, UK National Institute for Health Research, National Health and Medical Research Council of Australia, and the French National Research Agency., (Copyright © 2018 Elsevier Ltd. All rights reserved.)

Published
2018
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3. NEK1 variants confer susceptibility to amyotrophic lateral sclerosis.

Author

Kenna KP, van Doormaal PT, Dekker AM, Ticozzi N, Kenna BJ, Diekstra FP, van Rheenen W, van Eijk KR, Jones AR, Keagle P, Shatunov A, Sproviero W, Smith BN, van Es MA, Topp SD, Kenna A, Miller JW, Fallini C, Tiloca C, McLaughlin RL, Vance C, Troakes C, Colombrita C, Mora G, Calvo A, Verde F, Al-Sarraj S, King A, Calini D, de Belleroche J, Baas F, van der Kooi AJ, de Visser M, Ten Asbroek AL, Sapp PC, McKenna-Yasek D, Polak M, Asress S, Muñoz-Blanco JL, Strom TM, Meitinger T, Morrison KE, Lauria G, Williams KL, Leigh PN, Nicholson GA, Blair IP, Leblond CS, Dion PA, Rouleau GA, Pall H, Shaw PJ, Turner MR, Talbot K, Taroni F, Boylan KB, Van Blitterswijk M, Rademakers R, Esteban-Pérez J, García-Redondo A, Van Damme P, Robberecht W, Chio A, Gellera C, Drepper C, Sendtner M, Ratti A, Glass JD, Mora JS, Basak NA, Hardiman O, Ludolph AC, Andersen PM, Weishaupt JH, Brown RH Jr, Al-Chalabi A, Silani V, Shaw CE, van den Berg LH, Veldink JH, and Landers JE

Subjects
Amyotrophic Lateral Sclerosis epidemiology, Case-Control Studies, Cohort Studies, Exome genetics, Genetic Association Studies, Humans, Netherlands epidemiology, Amyotrophic Lateral Sclerosis genetics, Genetic Predisposition to Disease, Mutation genetics, NIMA-Related Kinase 1 genetics
Abstract

To identify genetic factors contributing to amyotrophic lateral sclerosis (ALS), we conducted whole-exome analyses of 1,022 index familial ALS (FALS) cases and 7,315 controls. In a new screening strategy, we performed gene-burden analyses trained with established ALS genes and identified a significant association between loss-of-function (LOF) NEK1 variants and FALS risk. Independently, autozygosity mapping for an isolated community in the Netherlands identified a NEK1 p.Arg261His variant as a candidate risk factor. Replication analyses of sporadic ALS (SALS) cases and independent control cohorts confirmed significant disease association for both p.Arg261His (10,589 samples analyzed) and NEK1 LOF variants (3,362 samples analyzed). In total, we observed NEK1 risk variants in nearly 3% of ALS cases. NEK1 has been linked to several cellular functions, including cilia formation, DNA-damage response, microtubule stability, neuronal morphology and axonal polarity. Our results provide new and important insights into ALS etiopathogenesis and genetic etiology.

Published
2016
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4. C9orf72 promoter hypermethylation is reduced while hydroxymethylation is acquired during reprogramming of ALS patient cells.

Author

Esanov R, Belle KC, van Blitterswijk M, Belzil VV, Rademakers R, Dickson DW, Petrucelli L, Boylan KB, Dykxhoorn DM, Wuu J, Benatar M, Wahlestedt C, and Zeier Z

Subjects
5-Methylcytosine metabolism, Brain pathology, C9orf72 Protein, Coculture Techniques, CpG Islands physiology, Cytosine analogs & derivatives, DNA Methylation genetics, Green Fluorescent Proteins genetics, Green Fluorescent Proteins metabolism, Homeodomain Proteins metabolism, Humans, Lymphocytes physiology, Motor Neurons physiology, Nanog Homeobox Protein, Nestin metabolism, RNA, Messenger metabolism, SOXB1 Transcription Factors metabolism, Time Factors, Amyotrophic Lateral Sclerosis genetics, Amyotrophic Lateral Sclerosis pathology, Induced Pluripotent Stem Cells physiology, Mutation genetics, Promoter Regions, Genetic physiology, Proteins genetics
Abstract

Among several genetic mutations known to cause amyotrophic lateral sclerosis (ALS), a hexanucleotide repeat expansion in the C9orf72 gene is the most common. In approximately 30% of C9orf72-ALS cases, 5-methylcytosine (5mC) levels within the C9orf72 promoter are increased, resulting in a modestly attenuated phenotype. The developmental timing of C9orf72 promoter hypermethylation and the reason why it occurs in only a subset of patients remain unknown. In order to model the acquisition of C9orf72 hypermethylation and examine the potential role of 5-hydroxymethylcytosine (5hmC), we generated induced pluripotent stem cells (iPSCs) from an ALS patient with C9orf72 promoter hypermethylation. Our data show that 5mC levels are reduced by reprogramming and then re-acquired upon neuronal specification, while 5hmC levels increase following reprogramming and are highest in iPSCs and motor neurons. We confirmed the presence of 5hmC within the C9orf72 promoter in post-mortem brain tissues of hypermethylated patients. These findings show that iPSCs are a valuable model system for examining epigenetic perturbations caused by the C9orf72 mutation and reveal a potential role for cytosine demethylation., (Copyright © 2015 Elsevier Inc. All rights reserved.)

Published
2016
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5. Whole-genome sequencing reveals important role for TBK1 and OPTN mutations in frontotemporal lobar degeneration without motor neuron disease.

Author

Pottier C, Bieniek KF, Finch N, van de Vorst M, Baker M, Perkersen R, Brown P, Ravenscroft T, van Blitterswijk M, Nicholson AM, DeTure M, Knopman DS, Josephs KA, Parisi JE, Petersen RC, Boylan KB, Boeve BF, Graff-Radford NR, Veltman JA, Gilissen C, Murray ME, Dickson DW, and Rademakers R

Subjects
Aged, Aged, 80 and over, Blotting, Western, Brain metabolism, Brain pathology, Cell Cycle Proteins, Cohort Studies, DNA Copy Number Variations, Female, Frontotemporal Lobar Degeneration metabolism, Frontotemporal Lobar Degeneration pathology, Gene Expression, Humans, Immunohistochemistry, Male, Membrane Transport Proteins, Motor Neuron Disease genetics, Motor Neuron Disease metabolism, Motor Neuron Disease pathology, Protein Serine-Threonine Kinases metabolism, RNA, Messenger metabolism, Sequence Analysis, DNA, Transcription Factor TFIIIA metabolism, Frontotemporal Lobar Degeneration genetics, Mutation, Protein Serine-Threonine Kinases genetics, Transcription Factor TFIIIA genetics
Abstract

Frontotemporal lobar degeneration with TAR DNA-binding protein 43 inclusions (FTLD-TDP) is the most common pathology associated with frontotemporal dementia (FTD). Repeat expansions in chromosome 9 open reading frame 72 (C9ORF72) and mutations in progranulin (GRN) are the major known genetic causes of FTLD-TDP; however, the genetic etiology in the majority of FTLD-TDP remains unexplained. In this study, we performed whole-genome sequencing in 104 pathologically confirmed FTLD-TDP patients from the Mayo Clinic brain bank negative for C9ORF72 and GRN mutations and report on the contribution of rare single nucleotide and copy number variants in 21 known neurodegenerative disease genes. Interestingly, we identified 5 patients (4.8 %) with variants in optineurin (OPTN) and TANK-binding kinase 1 (TBK1) that are predicted to be highly pathogenic, including two double mutants. Case A was a compound heterozygote for mutations in OPTN, carrying the p.Q235* nonsense and p.A481V missense mutation in trans, while case B carried a deletion of OPTN exons 13-15 (p.Gly538Glufs*27) and a loss-of-function mutation (p.Arg117*) in TBK1. Cases C-E carried heterozygous missense mutations in TBK1, including the p.Glu696Lys mutation which was previously reported in two amyotrophic lateral sclerosis (ALS) patients and is located in the OPTN binding domain. Quantitative mRNA expression and protein analysis in cerebellar tissue showed a striking reduction of OPTN and/or TBK1 expression in 4 out of 5 patients supporting pathogenicity in these specific patients and suggesting a loss-of-function disease mechanism. Importantly, neuropathologic examination showed FTLD-TDP type A in the absence of motor neuron disease in 3 pathogenic mutation carriers. In conclusion, we highlight TBK1 as an important cause of pure FTLD-TDP, identify the first OPTN mutations in FTLD-TDP, and suggest a potential oligogenic basis for at least a subset of FTLD-TDP patients. Our data further add to the growing body of evidence linking ALS and FTD and suggest a key role for the OPTN/TBK1 pathway in these diseases.

Published
2015
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6. Excess of rare damaging TUBA4A variants suggests cytoskeletal defects in ALS.

Author

Rademakers R and van Blitterswijk M

Subjects
Humans, Amyotrophic Lateral Sclerosis genetics, Exome genetics, Genetic Predisposition to Disease, Mutation genetics, Tubulin genetics
Abstract

Identifying disease genes implicated in late-onset neurodegenerative disorders can be challenging due to the lack of DNA samples from multiple affected family members. To overcome this limitation, Smith et al. (2014) report in this issue of Neuron the first exome-wide rare variant analysis in unrelated familial amyotrophic lateral sclerosis (ALS) patients associating TUBA4A with ALS.

Published
2014
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7. Progressive amnestic dementia, hippocampal sclerosis, and mutation in C9ORF72.

Author

Murray ME, Bieniek KF, Banks Greenberg M, DeJesus-Hernandez M, Rutherford NJ, van Blitterswijk M, Niemantsverdriet E, Ash PE, Gendron TF, Kouri N, Baker M, Goodman IJ, Petrucelli L, Rademakers R, and Dickson DW

Subjects
Aged, Aged, 80 and over, Blotting, Southern, Brain pathology, C9orf72 Protein, DNA genetics, Disease Progression, Female, Humans, Immunohistochemistry, Male, Neuropsychological Tests, Polymerase Chain Reaction, Sclerosis, TDP-43 Proteinopathies pathology, Tissue Banks, Trinucleotide Repeat Expansion, Wechsler Scales, Amnesia genetics, Dementia genetics, Hippocampus pathology, Mutation genetics, Proteins genetics
Abstract

The most common cause of familial frontotemporal lobar degeneration with TAR DNA-binding protein-43 pathology (FTLD-TDP) has been found to be an expansion of a hexanucleotide repeat (GGGGCC) in a noncoding region of the gene C9ORF72. Hippocampal sclerosis (HpScl) is a common finding in FTLD-TDP. Our objective was to screen for the presence of C9ORF72 hexanucleotide repeat expansions in a pathologically confirmed cohort of "pure" hippocampal sclerosis cases (n = 33), outside the setting of FTLD-TDP and Alzheimer's disease (AD). Using a recently described repeat-associated non-ATG (RAN) translation (C9RANT) antibody that was found to be highly specific for c9FTD/ALS, we identified a single "pure" HpScl autopsy case with a repeat expansion in C9ORF72 (c9HpScl). Mutation screening was also performed with repeat-primed polymerase chain reaction and further confirmed with Southern blotting. The c9HpScl patient had a 14-year history of a slowly progressive amnestic syndrome and a clinical diagnosis of probable AD. Neuropsychological testing revealed memory impairment, but no deficits in other cognitive domains. Autopsy showed hippocampal sclerosis with TDP-43 immunoreactive neuronal inclusions relatively limited to limbic lobe structures. Neuritic pathology immunoreactive for p62 was more frequent than TDP-43 in amygdala and hippocampus. Frequent p62-positive neuronal inclusions were present in cerebellar granule neurons as is typical of C9ORF72 mutation carriers. There was no significant FTLD or motor neuron disease. C9RANT was found to be sensitive and specific in this autopsy-confirmed series of HpScl cases. The findings in this patient suggest that the clinical and pathologic spectrum of C9ORF72 repeat expansion is wider than frontotemporal dementia and motor neuron disease, including cases of progressive amnestic dementia with restricted TDP-43 pathology associated with HpScl.

Published
2013
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8. Mutational analysis of TARDBP in Parkinson's disease.

Author

van Blitterswijk M, van Es MA, Verbaan D, van Hilten JJ, Scheffer H, van de Warrenburg BP, Veldink JH, and van den Berg LH

Subjects
Cohort Studies, Female, Genetic Markers genetics, Humans, Male, Middle Aged, Netherlands epidemiology, Risk Factors, DNA-Binding Proteins genetics, Genetic Predisposition to Disease epidemiology, Genetic Predisposition to Disease genetics, Mutation genetics, Parkinson Disease epidemiology, Parkinson Disease genetics, Polymorphism, Single Nucleotide genetics
Abstract

Mutations in TAR DNA-binding protein (TARDBP) are associated with heterogenic phenotypes, including amyotrophic lateral sclerosis, frontotemporal dementia, and Parkinson's disease. In this study, we investigated the presence of TARDBP mutations in a cohort of 429 Dutch patients with Parkinson's disease. Though we detected 1 silent mutation, p.S332S, no missense mutations were present in our cohort. Our findings, therefore, demonstrate that TARDBP mutations do not appear to contribute to the pathogenesis of Parkinson's disease in The Netherlands., (Copyright © 2013 Elsevier Inc. All rights reserved.)

Published
2013
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9. Characterization of FUS mutations in amyotrophic lateral sclerosis using RNA-Seq.

Author

van Blitterswijk M, Wang ET, Friedman BA, Keagle PJ, Lowe P, Leclerc AL, van den Berg LH, Housman DE, Veldink JH, and Landers JE

Subjects
Exons genetics, HEK293 Cells, Humans, Introns genetics, RNA, Small Interfering genetics, RNA-Binding Protein FUS deficiency, Amyotrophic Lateral Sclerosis genetics, Mutation, RNA-Binding Protein FUS genetics, Sequence Analysis, RNA
Abstract

Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease resulting in severe muscle weakness and eventual death by respiratory failure. Although little is known about its pathogenesis, mutations in fused in sarcoma/translated in liposarcoma (FUS) are causative for familial ALS. FUS is a multifunctional protein that is involved in many aspects of RNA processing. To elucidate the role of FUS in ALS, we overexpressed wild-type and two mutant forms of FUS in HEK-293T cells, as well as knocked-down FUS expression. This was followed by RNA-Seq to identify genes which displayed differential expression or altered splicing patterns. Pathway analysis revealed that overexpression of wild-type FUS regulates ribosomal genes, whereas knock-down of FUS additionally affects expression of spliceosome related genes. Furthermore, cells expressing mutant FUS displayed global transcription patterns more similar to cells overexpressing wild-type FUS than to the knock-down condition. This observation suggests that FUS mutants do not contribute to the pathogenesis of ALS through a loss-of-function. Finally, our results demonstrate that the R521G and R522G mutations display differences in their influence on transcription and splicing. Taken together, these results provide additional insights into the function of FUS and how mutations contribute to the development of ALS.

Published
2013
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10. VAPB and C9orf72 mutations in 1 familial amyotrophic lateral sclerosis patient.

Author

van Blitterswijk M, van Es MA, Koppers M, van Rheenen W, Medic J, Schelhaas HJ, van der Kooi AJ, de Visser M, Veldink JH, and van den Berg LH

Subjects
Aged, C9orf72 Protein, Cohort Studies, Family Health, Female, Humans, Male, Amyotrophic Lateral Sclerosis genetics, Genetic Predisposition to Disease genetics, Mutation genetics, Proteins genetics, Vesicular Transport Proteins genetics
Abstract

Previously, we have reported amyotrophic lateral sclerosis (ALS) families with multiple mutations in major ALS-associated genes. These findings provided evidence for an oligogenic basis of ALS. In our present study, we screened a cohort of 755 sporadic ALS patients, 111 familial ALS patients (97 families), and 765 control subjects of Dutch descent for mutations in vesicle-associated membrane protein B (VAPB). We have identified 1 novel VAPB mutation (p.V234I) in a familial ALS patient known to have a chromosome 9 open reading frame 72 (C9orf72) repeat expansion. This p.V234I mutation was absent in control subjects, located in a region with high evolutionary conservation, and predicted to have damaging effects. Taken together, these findings provide additional evidence for an oligogenic basis of ALS., (Copyright © 2012 Elsevier Inc. All rights reserved.)

Published
2012
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11. UBQLN2 in familial amyotrophic lateral sclerosis in The Netherlands.

Author

van Doormaal PT, van Rheenen W, van Blitterswijk M, Schellevis RD, Schelhaas HJ, de Visser M, van der Kooi AJ, Veldink JH, and van den Berg LH

Subjects
Adaptor Proteins, Signal Transducing, Autophagy-Related Proteins, Cohort Studies, DNA Mutational Analysis, Female, Humans, Male, Netherlands, Amyotrophic Lateral Sclerosis genetics, Cell Cycle Proteins genetics, Family Health, Mutation genetics, Ubiquitins genetics
Abstract

Recently it was discovered that mutations in the UBQLN2 gene were a cause of an X-linked dominant type of familial amyotrophic lateral sclerosis (ALS). We investigated the frequency of mutations in this gene in a cohort of 92 families with ALS in the Netherlands. Eight families were excluded because of male-to-male transmission. In the remaining 84 familial ALS cases no mutations were discovered in UBQLN2. Hence, UBQLN2 was not found to be a cause of familial ALS in the Netherlands., (Copyright © 2012 Elsevier Inc. All rights reserved.)

Published
2012
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13. Genetic overlap between apparently sporadic motor neuron diseases.

Author

van Blitterswijk M, Vlam L, van Es MA, van der Pol WL, Hennekam EA, Dooijes D, Schelhaas HJ, van der Kooi AJ, de Visser M, Veldink JH, and van den Berg LH

Subjects
Adult, Age of Onset, Aged, DNA-Binding Proteins genetics, Endosomal Sorting Complexes Required for Transport genetics, Female, Genotype, Haplotypes, Humans, Male, Middle Aged, RNA-Binding Protein FUS genetics, Ribonuclease, Pancreatic genetics, Superoxide Dismutase genetics, Superoxide Dismutase-1, Amyotrophic Lateral Sclerosis genetics, Muscular Atrophy, Spinal genetics, Mutation
Abstract

Progressive muscular atrophy (PMA) and amyotrophic lateral sclerosis (ALS) are devastating motor neuron diseases (MNDs), which result in muscle weakness and/or spasticity. We compared mutation frequencies in genes known to be associated with MNDs between patients with apparently sporadic PMA and ALS. A total of 261 patients with adult-onset sporadic PMA, patients with sporadic ALS, and control subjects of Dutch descent were obtained at national referral centers for neuromuscular diseases in The Netherlands. Sanger sequencing was used to screen these subjects for mutations in the coding regions of superoxide dismutase-1 (SOD1), angiogenin (ANG), fused in sarcoma/translated in liposarcoma (FUS/TLS), TAR DNA-binding protein 43 (TARDBP), and multivesicular body protein 2B (CHMP2B). In our cohort of PMA patients we identified two SOD1 mutations (p.D90A, p.I113T), one ANG mutation (p.K17I), one FUS/TLS mutation (p.R521H), one TARDBP mutation (p.N352S), and one novel CHMP2B mutation (p.R69Q). The mutation frequency of these genes was similar in sporadic PMA (2.7%) and ALS (2.0%) patients, and therefore, our findings demonstrate a genetic overlap between apparently sporadic PMA and ALS.

Published
2012
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14. Paraoxonase gene mutations in amyotrophic lateral sclerosis.

Author

Ticozzi N, LeClerc AL, Keagle PJ, Glass JD, Wills AM, van Blitterswijk M, Bosco DA, Rodriguez-Leyva I, Gellera C, Ratti A, Taroni F, McKenna-Yasek D, Sapp PC, Silani V, Furlong CE, Brown RH Jr, and Landers JE

Subjects
Amino Acid Sequence, DNA Mutational Analysis, Family, Humans, Sequence Homology, Amino Acid, Amyotrophic Lateral Sclerosis genetics, Aryldialkylphosphatase genetics, Esterases genetics, Mutation
Abstract

Three clustered, homologous paraoxonase genes (PON1, PON2, and PON3) have roles in preventing lipid oxidation and detoxifying organophosphates. Recent reports describe a genetic association between the PON genes and sporadic amyotrophic lateral sclerosis (ALS). We now report that in genomic DNA from individuals with familial and sporadic ALS, we have identified at least 7 PON gene mutations that are predicted to alter PON function.

Published
2010
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15. Association of Variants in the SPTLC1 Gene with Juvenile Amyotrophic Lateral Sclerosis

Author

Johnson, JO, Chia, R, Miller, DE, Li, R, Kumaran, R, Abramzon, Y, Alahmady, N, Renton, AE, Topp, SD, Gibbs, JR, Cookson, MR, Sabir, MS, Dalgard, CL, Troakes, C, Jones, AR, Shatunov, A, Iacoangeli, A, Al Khleifat, A, Ticozzi, N, Silani, V, Gellera, C, Blair, IP, Dobson-Stone, C, Kwok, JB, Bonkowski, ES, Palvadeau, R, Tienari, PJ, Morrison, KE, Shaw, PJ, Al-Chalabi, A, Brown, RH, Calvo, A, Mora, G, Al-Saif, H, Gotkine, M, Leigh, F, Chang, IJ, Perlman, SJ, Glass, I, Scott, AI, Shaw, CE, Basak, AN, Landers, JE, Chiò, A, Crawford, TO, Smith, BN, Traynor, BJ, Fallini, C, Gkazi, AS, Scotter, EL, Kenna, KP, Keagle, P, Tiloca, C, Vance, C, Colombrita, C, King, A, Pensato, V, Castellotti, B, Baas, F, ten Asbroek, ALMA, McKenna-Yasek, D, McLaughlin, RL, Polak, M, Asress, S, Esteban-Pérez, J, Stevic, Z, D’Alfonso, S, Mazzini, L, Comi, GP, Del Bo, R, Ceroni, M, Gagliardi, S, Querin, G, Bertolin, C, van Rheenen, W, Rademakers, R, van Blitterswijk, M, Lauria, G, Duga, S, Corti, S, Cereda, C, Corrado, L, Sorarù, G, Williams, KL, Nicholson, GA, Leblond-Manry, C, Rouleau, GA, Hardiman, O, Veldink, JH, van den Berg, LH, Pall, H, Turner, MR, Talbot, K, Taroni, F, García-Redondo, A, Wu, Z, Glass, JD, Ratti, A, Adeleye, A, Soltis, AR, Alba, C, Viollet, C, Bacikova, D, Hupalo, DN, Sukumar, G, Pollard, HB, Wilkerson, MD, Martinez, EM, Ahmed, S, Arepalli, S, Baloh, RH, Bowser, R, Brady, CB, Brice, A, Broach, J, Campbell, RH, Camu, W, Cooper-Knock, J, Ding, J, Drepper, C, Drory, VE, Dunckley, TL, Eicher, JD, England, BK, Faghri, F, Feldman, E, Floeter, MK, Fratta, P, Geiger, JT, Gerhard, G, Gibson, SB, Hardy, J, Harms, MB, Heiman-Patterson, TD, Hernandez, DG, Jansson, L, Kirby, J, Kowall, NW, Laaksovirta, H, Landeck, N, Landi, F, Le Ber, I, Lumbroso, S, MacGowan, DJL, Maragakis, NJ, Mouzat, K, Murphy, NA, Myllykangas, L, Nalls, MA, Orrell, RW, Ostrow, LW, Pamphlett, R, Pickering-Brown, S, Pioro, EP, Pletnikova, O, Pliner, HA, Pulst, SM, Ravits, JM, Rivera, A, Robberecht, W, Rogaeva, E, Rollinson, S, Rothstein, JD, Scholz, SW, Sendtner, M, Sidle, KC, Simmons, Z, Singleton, AB, Smith, N, Stone, DJ, Troncoso, JC, Valori, M, Van Damme, P, Van Deerlin, VM, Van Den Bosch, L, Zinman, L, Angelocola, SM, Ausiello, FP, Barberis, M, Bartolomei, I, Battistini, S, Bersano, E, Bisogni, G, Borghero, G, Brunetti, M, Cabona, C, Canale, F, Canosa, A, Cantisani, TA, Capasso, M, Caponnetto, C, Cardinali, P, Carrera, P, Casale, F, Colletti, T, Conforti, FL, Conte, A, Conti, E, Corbo, M, Cuccu, S, Dalla Bella, E, D’Errico, E, DeMarco, G, Dubbioso, R, Ferrarese, C, Ferraro, PM, Filippi, M, Fini, N, Floris, G, Fuda, G, Gallone, S, Gianferrari, G, Giannini, F, Grassano, M, Greco, L, Iazzolino, B, Introna, A, La Bella, V, Lattante, S, Liguori, R, Logroscino, G, Logullo, FO, Lunetta, C, Mandich, P, Mandrioli, J, Manera, U, Manganelli, F, Marangi, G, Marinou, K, Marrosu, MG, Martinelli, I, Messina, S, Moglia, C, Mosca, L, Murru, MR, Origone, P, Passaniti, C, Petrelli, C, Petrucci, A, Pozzi, S, Pugliatti, M, Quattrini, A, Ricci, C, Riolo, G, Riva, N, Russo, M, Sabatelli, M, Salamone, P, Salivetto, M, Salvi, F, Santarelli, M, Sbaiz, L, Sideri, R, Simone, I, Simonini, C, Spataro, R, Tanel, R, Tedeschi, G, Ticca, A, Torriello, A, Tranquilli, S, Tremolizzo, L, Trojsi, F, Vasta, R, Vacchiano, V, Vita, G, Volanti, P, Zollino, M, Zucchi, E, Johnson J.O., Chia R., Miller D.E., Li R., Kumaran R., Abramzon Y., Alahmady N., Renton A.E., Topp S.D., Gibbs J.R., Cookson M.R., Sabir M.S., Dalgard C.L., Troakes C., Jones A.R., Shatunov A., Iacoangeli A., Al Khleifat A., Ticozzi N., Silani V., Gellera C., Blair I.P., Dobson-Stone C., Kwok J.B., Bonkowski E.S., Palvadeau R., Tienari P.J., Morrison K.E., Shaw P.J., Al-Chalabi A., Brown R.H., Calvo A., Mora G., Al-Saif H., Gotkine M., Leigh F., Chang I.J., Perlman S.J., Glass I., Scott A.I., Shaw C.E., Basak A.N., Landers J.E., Chio A., Crawford T.O., Smith B.N., Traynor B.J., Fallini C., Gkazi A.S., Scotter E.L., Kenna K.P., Keagle P., Tiloca C., Vance C., Colombrita C., King A., Pensato V., Castellotti B., Baas F., Ten Asbroek A.L.M.A., McKenna-Yasek D., McLaughlin R.L., Polak M., Asress S., Esteban-Perez J., Stevic Z., D'Alfonso S., Mazzini L., Comi G.P., Del Bo R., Ceroni M., Gagliardi S., Querin G., Bertolin C., Van Rheenen W., Rademakers R., Van Blitterswijk M., Lauria G., Duga S., Corti S., Cereda C., Corrado L., Soraru G., Williams K.L., Nicholson G.A., Leblond-Manry C., Rouleau G.A., Hardiman O., Veldink J.H., Van Den Berg L.H., Pall H., Turner M.R., Talbot K., Taroni F., Garcia-Redondo A., Wu Z., Glass J.D., Ratti A., Adeleye A., Soltis A.R., Alba C., Viollet C., Bacikova D., Hupalo D.N., Sukumar G., Pollard H.B., Wilkerson M.D., Martinez E.M., Ahmed S., Arepalli S., Baloh R.H., Bowser R., Brady C.B., Brice A., Broach J., Campbell R.H., Camu W., Cooper-Knock J., Ding J., Drepper C., Drory V.E., Dunckley T.L., Eicher J.D., England B.K., Faghri F., Feldman E., Floeter M.K., Fratta P., Geiger J.T., Gerhard G., Gibson S.B., Hardy J., Harms M.B., Heiman-Patterson T.D., Hernandez D.G., Jansson L., Kirby J., Kowall N.W., Laaksovirta H., Landeck N., Landi F., Le Ber I., Lumbroso S., Macgowan D.J.L., Maragakis N.J., Mouzat K., Murphy N.A., Myllykangas L., Nalls M.A., Orrell R.W., Ostrow L.W., Pamphlett R., Pickering-Brown S., Pioro E.P., Pletnikova O., Pliner H.A., Pulst S.M., Ravits J.M., Rivera A., Robberecht W., Rogaeva E., Rollinson S., Rothstein J.D., Scholz S.W., Sendtner M., Sidle K.C., Simmons Z., Singleton A.B., Smith N., Stone D.J., Troncoso J.C., Valori M., Van Damme P., Van Deerlin V.M., Van Den Bosch L., Zinman L., Angelocola S.M., Ausiello F.P., Barberis M., Bartolomei I., Battistini S., Bersano E., Bisogni G., Borghero G., Brunetti M., Cabona C., Canale F., Canosa A., Cantisani T.A., Capasso M., Caponnetto C., Cardinali P., Carrera P., Casale F., Colletti T., Conforti F.L., Conte A., Conti E., Corbo M., Cuccu S., Dalla Bella E., D'Errico E., Demarco G., Dubbioso R., Ferrarese C., Ferraro P.M., Filippi M., Fini N., Floris G., Fuda G., Gallone S., Gianferrari G., Giannini F., Grassano M., Greco L., Iazzolino B., Introna A., La Bella V., Lattante S., Liguori R., Logroscino G., Logullo F.O., Lunetta C., Mandich P., Mandrioli J., Manera U., Manganelli F., Marangi G., Marinou K., Marrosu M.G., Martinelli I., Messina S., Moglia C., Mosca L., Murru M.R., Origone P., Passaniti C., Petrelli C., Petrucci A., Pozzi S., Pugliatti M., Quattrini A., Ricci C., Riolo G., Riva N., Russo M., Sabatelli M., Salamone P., Salivetto M., Salvi F., Santarelli M., Sbaiz L., Sideri R., Simone I., Simonini C., Spataro R., Tanel R., Tedeschi G., Ticca A., Torriello A., Tranquilli S., Tremolizzo L., Trojsi F., Vasta R., Vacchiano V., Vita G., Volanti P., Zollino M., Zucchi E., Johnson, J. O., Chia, R., Miller, D. E., Li, R., Kumaran, R., Abramzon, Y., Alahmady, N., Renton, A. E., Topp, S. D., Gibbs, J. R., Cookson, M. R., Sabir, M. S., Dalgard, C. L., Troakes, C., Jones, A. R., Shatunov, A., Iacoangeli, A., Al Khleifat, A., Ticozzi, N., Silani, V., Gellera, C., Blair, I. P., Dobson-Stone, C., Kwok, J. B., Bonkowski, E. S., Palvadeau, R., Tienari, P. J., Morrison, K. E., Shaw, P. J., Al-Chalabi, A., Brown, R. H., Calvo, A., Mora, G., Al-Saif, H., Gotkine, M., Leigh, F., Chang, I. J., Perlman, S. J., Glass, I., Scott, A. I., Shaw, C. E., Basak, A. N., Landers, J. E., Chio, A., Crawford, T. O., Smith, B. N., Traynor, B. J., Fallini, C., Gkazi, A. S., Scotter, E. L., Kenna, K. P., Keagle, P., Tiloca, C., Vance, C., Colombrita, C., King, A., Pensato, V., Castellotti, B., Baas, F., Ten Asbroek, A. L. M. A., McKenna-Yasek, D., Mclaughlin, R. L., Polak, M., Asress, S., Esteban-Perez, J., Stevic, Z., D'Alfonso, S., Mazzini, L., Comi, G. P., Del Bo, R., Ceroni, M., Gagliardi, S., Querin, G., Bertolin, C., Van Rheenen, W., Rademakers, R., Van Blitterswijk, M., Lauria, G., Duga, S., Corti, S., Cereda, C., Corrado, L., Soraru, G., Williams, K. L., Nicholson, G. A., Leblond-Manry, C., Rouleau, G. A., Hardiman, O., Veldink, J. H., Van Den Berg, L. H., Pall, H., Turner, M. R., Talbot, K., Taroni, F., Garcia-Redondo, A., Wu, Z., Glass, J. D., Ratti, A., Adeleye, A., Soltis, A. R., Alba, C., Viollet, C., Bacikova, D., Hupalo, D. N., Sukumar, G., Pollard, H. B., Wilkerson, M. D., Martinez, E. M., Ahmed, S., Arepalli, S., Baloh, R. H., Bowser, R., Brady, C. B., Brice, A., Broach, J., Campbell, R. H., Camu, W., Cooper-Knock, J., Ding, J., Drepper, C., Drory, V. E., Dunckley, T. L., Eicher, J. D., England, B. K., Faghri, F., Feldman, E., Floeter, M. K., Fratta, P., Geiger, J. T., Gerhard, G., Gibson, S. B., Hardy, J., Harms, M. B., Heiman-Patterson, T. D., Hernandez, D. G., Jansson, L., Kirby, J., Kowall, N. W., Laaksovirta, H., Landeck, N., Landi, F., Le Ber, I., Lumbroso, S., Macgowan, D. J. L., Maragakis, N. J., Mouzat, K., Murphy, N. A., Myllykangas, L., Nalls, M. A., Orrell, R. W., Ostrow, L. W., Pamphlett, R., Pickering-Brown, S., Pioro, E. P., Pletnikova, O., Pliner, H. A., Pulst, S. M., Ravits, J. M., Rivera, A., Robberecht, W., Rogaeva, E., Rollinson, S., Rothstein, J. D., Scholz, S. W., Sendtner, M., Sidle, K. C., Simmons, Z., Singleton, A. B., Smith, N., Stone, D. J., Troncoso, J. C., Valori, M., Van Damme, P., Van Deerlin, V. M., Van Den Bosch, L., Zinman, L., Angelocola, S. M., Ausiello, F. P., Barberis, M., Bartolomei, I., Battistini, S., Bersano, E., Bisogni, G., Borghero, G., Brunetti, M., Cabona, C., Canale, F., Canosa, A., Cantisani, T. A., Capasso, M., Caponnetto, C., Cardinali, P., Carrera, P., Casale, F., Colletti, T., Conforti, F. L., Conte, A., Conti, E., Corbo, M., Cuccu, S., Dalla Bella, E., D'Errico, E., Demarco, G., Dubbioso, R., Ferrarese, C., Ferraro, P. M., Filippi, M., Fini, N., Floris, G., Fuda, G., Gallone, S., Gianferrari, G., Giannini, F., Grassano, M., Greco, L., Iazzolino, B., Introna, A., La Bella, V., Lattante, S., Liguori, R., Logroscino, G., Logullo, F. O., Lunetta, C., Mandich, P., Mandrioli, J., Manera, U., Manganelli, F., Marangi, G., Marinou, K., Marrosu, M. G., Martinelli, I., Messina, S., Moglia, C., Mosca, L., Murru, M. R., Origone, P., Passaniti, C., Petrelli, C., Petrucci, A., Pozzi, S., Pugliatti, M., Quattrini, A., Ricci, C., Riolo, G., Riva, N., Russo, M., Sabatelli, M., Salamone, P., Salivetto, M., Salvi, F., Santarelli, M., Sbaiz, L., Sideri, R., Simone, I., Simonini, C., Spataro, R., Tanel, R., Tedeschi, G., Ticca, A., Torriello, A., Tranquilli, S., Tremolizzo, L., Trojsi, F., Vasta, R., Vacchiano, V., Vita, G., Volanti, P., Zollino, M., Zucchi, E., Başak, Ayşe Nazlı (ORCID 0000-0001-9257-3540 & YÖK ID 1512), Palvadeau, Robin, Johnson, Janel O., Chia, Ruth, Miller, Danny E., Li, Rachel, Kumaran, Ravindran, Abramzon, Yevgeniya, Alahmady, Nada, Renton, Alan E., Topp, Simon D., Gibbs, J. Raphael, Cookson, Mark R., Sabir, Marya S., Dalgard, Clifton L., Troakes, Claire, Jones, Ashley R., Shatunov, Aleksey, Lacoangeli, Alfredo, Al Khleifat, Ahmad, Ticozzi, Nicola, Silani, Vincenzo, Gellera, Cinzia, Blair, Ian P., Dobson-Stone, Carol, Kwok, John B., Bonkowski, Emily S., Tienari, Pentti J., Morrison, Karen E., Shaw, Pamela J., Al-Chalabi, Ammar, Jr, Robert H. Brown, Calvo, Andrea, Mora, Gabriele, Al-Saif, Hind, Gotkine, Marc, Leigh, Fawn, Chang, Irene J., Perlman, Seth J., Glass, Ian, Scott, Anna, I., Landers, John E., Chio, Adriano, Crawford, Thomas O., Smith, Bradley N., Traynor, Bryan J., Koç University Research Center for Translational Medicine (KUTTAM) / Koç Üniversitesi Translasyonel Tıp Araştırma Merkezi (KUTTAM), School of Medicine, Johnson, J, Chia, R, Miller, D, Li, R, Kumaran, R, Abramzon, Y, Alahmady, N, Renton, A, Topp, S, Gibbs, J, Cookson, M, Sabir, M, Dalgard, C, Troakes, C, Jones, A, Shatunov, A, Iacoangeli, A, Al Khleifat, A, Ticozzi, N, Silani, V, Gellera, C, Blair, I, Dobson-Stone, C, Kwok, J, Bonkowski, E, Palvadeau, R, Tienari, P, Morrison, K, Shaw, P, Al-Chalabi, A, Brown, R, Calvo, A, Mora, G, Al-Saif, H, Gotkine, M, Leigh, F, Chang, I, Perlman, S, Glass, I, Scott, A, Shaw, C, Basak, A, Landers, J, Chiò, A, Crawford, T, Smith, B, Traynor, B, Fallini, C, Gkazi, A, Scotter, E, Kenna, K, Keagle, P, Tiloca, C, Vance, C, Colombrita, C, King, A, Pensato, V, Castellotti, B, Baas, F, Ten Asbroek, A, McKenna-Yasek, D, Mclaughlin, R, Polak, M, Asress, S, Esteban-Pérez, J, Stevic, Z, D'Alfonso, S, Mazzini, L, Comi, G, Del Bo, R, Ceroni, M, Gagliardi, S, Querin, G, Bertolin, C, van Rheenen, W, Rademakers, R, van Blitterswijk, M, Lauria, G, Duga, S, Corti, S, Cereda, C, Corrado, L, Sorarù, G, Williams, K, Nicholson, G, Leblond-Manry, C, Rouleau, G, Hardiman, O, Veldink, J, van den Berg, L, Pall, H, Turner, M, Talbot, K, Taroni, F, García-Redondo, A, Wu, Z, Glass, J, Ratti, A, Adeleye, A, Soltis, A, Alba, C, Viollet, C, Bacikova, D, Hupalo, D, Sukumar, G, Pollard, H, Wilkerson, M, Martinez, E, Ahmed, S, Arepalli, S, Baloh, R, Bowser, R, Brady, C, Brice, A, Broach, J, Campbell, R, Camu, W, Cooper-Knock, J, Ding, J, Drepper, C, Drory, V, Dunckley, T, Eicher, J, England, B, Faghri, F, Feldman, E, Floeter, M, Fratta, P, Geiger, J, Gerhard, G, Gibson, S, Hardy, J, Harms, M, Heiman-Patterson, T, Hernandez, D, Jansson, L, Kirby, J, Kowall, N, Laaksovirta, H, Landeck, N, Landi, F, Le Ber, I, Lumbroso, S, Macgowan, D, Maragakis, N, Mouzat, K, Murphy, N, Myllykangas, L, Nalls, M, Orrell, R, Ostrow, L, Pamphlett, R, Pickering-Brown, S, Pioro, E, Pletnikova, O, Pliner, H, Pulst, S, Ravits, J, Rivera, A, Robberecht, W, Rogaeva, E, Rollinson, S, Rothstein, J, Scholz, S, Sendtner, M, Sidle, K, Simmons, Z, Singleton, A, Smith, N, Stone, D, Troncoso, J, Valori, M, Van Damme, P, Van Deerlin, V, Van Den Bosch, L, Zinman, L, Angelocola, S, Ausiello, F, Barberis, M, Bartolomei, I, Battistini, S, Bersano, E, Bisogni, G, Borghero, G, Brunetti, M, Cabona, C, Canale, F, Canosa, A, Cantisani, T, Capasso, M, Caponnetto, C, Cardinali, P, Carrera, P, Casale, F, Colletti, T, Conforti, F, Conte, A, Conti, E, Corbo, M, Cuccu, S, Dalla Bella, E, D'Errico, E, Demarco, G, Dubbioso, R, Ferrarese, C, Ferraro, P, Filippi, M, Fini, N, Floris, G, Fuda, G, Gallone, S, Gianferrari, G, Giannini, F, Grassano, M, Greco, L, Iazzolino, B, Introna, A, La Bella, V, Lattante, S, Liguori, R, Logroscino, G, Logullo, F, Lunetta, C, Mandich, P, Mandrioli, J, Manera, U, Manganelli, F, Marangi, G, Marinou, K, Marrosu, M, Martinelli, I, Messina, S, Moglia, C, Mosca, L, Murru, M, Origone, P, Passaniti, C, Petrelli, C, Petrucci, A, Pozzi, S, Pugliatti, M, Quattrini, A, Ricci, C, Riolo, G, Riva, N, Russo, M, Sabatelli, M, Salamone, P, Salivetto, M, Salvi, F, Santarelli, M, Sbaiz, L, Sideri, R, Simone, I, Simonini, C, Spataro, R, Tanel, R, Tedeschi, G, Ticca, A, Torriello, A, Tranquilli, S, Tremolizzo, L, Trojsi, F, Vasta, R, Vacchiano, V, Vita, G, Volanti, P, Zollino, M, Zucchi, E, HUS Neurocenter, Department of Neurosciences, Clinicum, Neurologian yksikkö, TRIMM - Translational Immunology Research Program, Pentti Tienari / Principal Investigator, Human Genetics, ARD - Amsterdam Reproduction and Development, ANS - Complex Trait Genetics, Johnson, Janel O, Miller, Danny E, Renton, Alan E, Topp, Simon D, Gibbs, J Raphael, Cookson, Mark R, Sabir, Marya S, Dalgard, Clifton L, Jones, Ashley R, Iacoangeli, Alfredo, Blair, Ian P, Kwok, John B, Bonkowski, Emily S, Tienari, Pentti J, Morrison, Karen E, Shaw, Pamela J, Brown, Robert H, Chang, Irene J, Perlman, Seth J, Scott, Anna I, Shaw, Christopher E, Basak, A Nazli, Landers, John E, Chiò, Adriano, Crawford, Thomas O, Smith, Bradley N, Traynor, Bryan J, Fallini, Claudia, Gkazi, Athina Soragia, Scotter, Emma L, Kenna, Kevin P, Keagle, Pamela, Tiloca, Cinzia, Vance, Caroline, Colombrita, Claudia, King, Andrew, Pensato, Viviana, Castellotti, Barbara, Baas, Frank, Ten Asbroek, Anneloor L M A, McKenna-Yasek, Diane, Mclaughlin, Russell L, Polak, Meraida, Asress, Seneshaw, Esteban-Pérez, Jesú, Stevic, Zorica, D'Alfonso, Sandra, Mazzini, Letizia, Comi, Giacomo P, Del Bo, Roberto, Ceroni, Mauro, Gagliardi, Stella, Querin, Giorgia, Bertolin, Cinzia, van Rheenen, Wouter, Rademakers, Rosa, van Blitterswijk, Marka, Lauria, Giuseppe, Duga, Stefano, Corti, Stefania, Cereda, Cristina, Corrado, Lucia, Sorarù, Gianni, Williams, Kelly L, Nicholson, Garth A, Leblond-Manry, Claire, Rouleau, Guy A, Hardiman, Orla, Veldink, Jan H, van den Berg, Leonard H, Pall, Hardev, Turner, Martin R, Talbot, Kevin, Taroni, Franco, García-Redondo, Alberto, Wu, Zheyang, Glass, Jonathan D, Ratti, Antonia, Adeleye, Adelani, Soltis, Anthony R, Alba, Camille, Viollet, Coralie, Bacikova, Dagmar, Hupalo, Daniel N, Sukumar, Gauthaman, Pollard, Harvey B, Wilkerson, Matthew D, Martinez, Elisa McGrath, Ahmed, Sarah, Arepalli, Sampath, Baloh, Robert H, Bowser, Robert, Brady, Christopher B, Brice, Alexi, Broach, Jame, Campbell, Roy H, Camu, William, Cooper-Knock, John, Ding, Jinhui, Drepper, Carsten, Drory, Vivian E, Dunckley, Travis L, Eicher, John D, England, Bryce K, Faghri, Faraz, Feldman, Eva, Floeter, Mary Kay, Fratta, Pietro, Geiger, Joshua T, Gerhard, Glenn, Gibson, Summer B, Hardy, John, Harms, Matthew B, Heiman-Patterson, Terry D, Hernandez, Dena G, Jansson, Lilja, Kirby, Janine, Kowall, Neil W, Laaksovirta, Hannu, Landeck, Natalie, Landi, Francesco, Le Ber, Isabelle, Lumbroso, Serge, Macgowan, Daniel J L, Maragakis, Nicholas J, Mouzat, Kevin, Murphy, Natalie A, Myllykangas, Liisa, Nalls, Mike A, Orrell, Richard W, Ostrow, Lyle W, Pamphlett, Roger, Pickering-Brown, Stuart, Pioro, Erik P, Pletnikova, Olga, Pliner, Hannah A, Pulst, Stefan M, Ravits, John M, Rivera, Alberto, Robberecht, Wim, Rogaeva, Ekaterina, Rollinson, Sara, Rothstein, Jeffrey D, Scholz, Sonja W, Sendtner, Michael, Sidle, Katie C, Simmons, Zachary, Singleton, Andrew B, Smith, Nathan, Stone, David J, Troncoso, Juan C, Valori, Miko, Van Damme, Philip, Van Deerlin, Vivianna M, Van Den Bosch, Ludo, Zinman, Lorne, Angelocola, Stefania M, Ausiello, Francesco P, Barberis, Marco, Bartolomei, Ilaria, Battistini, Stefania, Bersano, Enrica, Bisogni, Giulia, Borghero, Giuseppe, Brunetti, Maura, Cabona, Corrado, Canale, Fabrizio, Canosa, Antonio, Cantisani, Teresa A, Capasso, Margherita, Caponnetto, Claudia, Cardinali, Patrizio, Carrera, Paola, Casale, Federico, Colletti, Tiziana, Conforti, Francesca L, Conte, Amelia, Conti, Elisa, Corbo, Massimo, Cuccu, Stefania, Dalla Bella, Eleonora, D'Errico, Eustachio, Demarco, Giovanni, Dubbioso, Raffaele, Ferrarese, Carlo, Ferraro, Pilar M, Filippi, Massimo, Fini, Nicola, Floris, Gianluca, Fuda, Giuseppe, Gallone, Salvatore, Gianferrari, Giulia, Giannini, Fabio, Grassano, Maurizio, Greco, Lucia, Iazzolino, Barbara, Introna, Alessandro, La Bella, Vincenzo, Lattante, Serena, Liguori, Rocco, Logroscino, Giancarlo, Logullo, Francesco O, Lunetta, Christian, Mandich, Paola, Mandrioli, Jessica, Manera, Umberto, Manganelli, Fiore, Marangi, Giuseppe, Marinou, Kalliopi, Marrosu, Maria Giovanna, Martinelli, Ilaria, Messina, Sonia, Moglia, Cristina, Mosca, Lorena, Murru, Maria R, Origone, Paola, Passaniti, Carla, Petrelli, Cristina, Petrucci, Antonio, Pozzi, Susanna, Pugliatti, Maura, Quattrini, Angelo, Ricci, Claudia, Riolo, Giulia, Riva, Nilo, Russo, Massimo, Sabatelli, Mario, Salamone, Paolina, Salivetto, Marco, Salvi, Fabrizio, Santarelli, Marialuisa, Sbaiz, Luca, Sideri, Riccardo, Simone, Isabella, Simonini, Cecilia, Spataro, Rossella, Tanel, Raffaella, Tedeschi, Gioacchino, Ticca, Anna, Torriello, Antonella, Tranquilli, Stefania, Tremolizzo, Lucio, Trojsi, Francesca, Vasta, Rosario, Vacchiano, Veria, Vita, Giuseppe, Volanti, Paolo, Zollino, Marcella, and Zucchi, Elisabetta

Subjects
Hereditary sensory neuropathy, L-serine, Mutations, Deoxysphingolipids, Accumulation, Enzyme complex, Juvenile amyotrophic lateral sclerosis, Serine C-Palmitoyltransferase, Whole Exome Sequencing, 0302 clinical medicine, Medicine, Family history, Amyotrophic lateral sclerosis, Child, Index case, Exome sequencing, Original Investigation, 0303 health sciences, Neurosciences and neurology, 3. Good health, Child, Preschool, Failure to thrive, Female, medicine.symptom, Life Sciences & Biomedicine, L-SERINE, Comments, Human, Adult, medicine.medical_specialty, Adolescent, Amyotrophic Lateral Sclerosis, Genetic Predisposition to Disease, Humans, Mutation, Young Adult, Clinical Neurology, NO, 03 medical and health sciences, DEOXYSPHINGOLIPIDS, Internal medicine, Exome Sequencing, Online First, Juvenile, Preschool, 030304 developmental biology, ACCUMULATION, Science & Technology, SPTLC1, business.industry, MUTATIONS, Research, 3112 Neurosciences, medicine.disease, HEREDITARY SENSORY NEUROPATHY, juvenile, 3111 Biomedicine, Neurology (clinical), Neurosciences & Neurology, ALS, genetic, business, 030217 neurology & neurosurgery, Amyotrophic Lateral Sclerosi
Abstract

Key Points Question What genetic variants are associated with juvenile amyotrophic lateral sclerosis (ALS)? Findings In this family-based genetic study, exome sequencing was performed in 3 patients diagnosed with juvenile ALS and failure to thrive; this identified de novo variants in SPTLC1 (p.Ala20Ser in 2 patients and p.Ser331Tyr in 1 patient). Variants in SPTLC1 are a known cause of hereditary sensory and autonomic neuropathy, type 1A, and these data extend the phenotype associated with this gene. Meaning De novo variants in the SPTLC1 gene are associated with juvenile ALS, a fatal neurological disorder., This genetic association study identifies genetic variants associated with juvenile amyotrophic lateral sclerosis., Importance Juvenile amyotrophic lateral sclerosis (ALS) is a rare form of ALS characterized by age of symptom onset less than 25 years and a variable presentation. Objective To identify the genetic variants associated with juvenile ALS. Design, Setting, and Participants In this multicenter family-based genetic study, trio whole-exome sequencing was performed to identify the disease-associated gene in a case series of unrelated patients diagnosed with juvenile ALS and severe growth retardation. The patients and their family members were enrolled at academic hospitals and a government research facility between March 1, 2016, and March 13, 2020, and were observed until October 1, 2020. Whole-exome sequencing was also performed in a series of patients with juvenile ALS. A total of 66 patients with juvenile ALS and 6258 adult patients with ALS participated in the study. Patients were selected for the study based on their diagnosis, and all eligible participants were enrolled in the study. None of the participants had a family history of neurological disorders, suggesting de novo variants as the underlying genetic mechanism. Main Outcomes and Measures De novo variants present only in the index case and not in unaffected family members. Results Trio whole-exome sequencing was performed in 3 patients diagnosed with juvenile ALS and their parents. An additional 63 patients with juvenile ALS and 6258 adult patients with ALS were subsequently screened for variants in the SPTLC1 gene. De novo variants in SPTLC1 (p.Ala20Ser in 2 patients and p.Ser331Tyr in 1 patient) were identified in 3 unrelated patients diagnosed with juvenile ALS and failure to thrive. A fourth variant (p.Leu39del) was identified in a patient with juvenile ALS where parental DNA was unavailable. Variants in this gene have been previously shown to be associated with autosomal-dominant hereditary sensory autonomic neuropathy, type 1A, by disrupting an essential enzyme complex in the sphingolipid synthesis pathway. Conclusions and Relevance These data broaden the phenotype associated with SPTLC1 and suggest that patients presenting with juvenile ALS should be screened for variants in this gene.

Published
2021
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