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Wang X, Fan X, Zhang J, Wang F, Chen J, Wen Y, Wang L, Li T, Li H, Gu H, Zhang Y, Yuan S. hnRNPA2B1 represses the disassembly of arsenite-induced stress granules and is essential for male fertility. Cell Rep 2024; 43:113769. [PMID: 38363675 DOI: 10.1016/j.celrep.2024.113769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 12/19/2023] [Accepted: 01/25/2024] [Indexed: 02/18/2024] Open
Abstract
Although the composition and assembly of stress granules (SGs) are well understood, the molecular mechanisms underlying SG disassembly remain unclear. Here, we identify that heterogeneous nuclear ribonucleoprotein A2/B1 (hnRNPA2B1) is associated with SGs and that its absence specifically enhances the disassembly of arsenite-induced SGs depending on the ubiquitination-proteasome system but not the autophagy pathway. hnRNPA2B1 interacts with many core SG proteins, including G3BP1, G3BP2, USP10, and Caprin-1; USP10 can deubiquitinate G3BP1; and hnRNPA2B1 depletion attenuates the G3BP1-USP10/Caprin-1 interaction but elevates the G3BP1 ubiquitination level under arsenite treatment. Moreover, the disease-causing mutation FUSR521C also disassembles faster from SGs in HNRNPA2B1 mutant cells. Furthermore, knockout of hnRNPA2B1 in mice leads to Sertoli cell-only syndrome (SCOS), causing complete male infertility. Consistent with this, arsenite-induced SGs disassemble faster in Hnrnpa2b1 knockout (KO) mouse Sertoli cells as well. These findings reveal the essential roles of hnRNPA2B1 in regulating SG disassembly and male mouse fertility.
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Affiliation(s)
- Xiaoli Wang
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
| | - Xu Fan
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jin Zhang
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Fengli Wang
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jingshou Chen
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yujiao Wen
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Lingjuan Wang
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Tao Li
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Huaibiao Li
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Heng Gu
- NHC Key Laboratory of Male Reproduction and Genetics, Guangdong Provincial Reproductive Science Institute (Guangdong Provincial Fertility Hospital), Guangzhou 510600, China
| | - Youzhi Zhang
- School of Pharmacy, Hubei University of Science and Technology, Xianning 437100, China
| | - Shuiqiao Yuan
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China; Laboratory of the Animal Center, Huazhong University of Science and Technology, Wuhan 430030, China; Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen 518057, China.
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2
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Xiao X, Li M, Ye Z, He X, Wei J, Zha Y. FUS gene mutation in amyotrophic lateral sclerosis: a new case report and systematic review. Amyotroph Lateral Scler Frontotemporal Degener 2024; 25:1-15. [PMID: 37926865 DOI: 10.1080/21678421.2023.2272170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 10/08/2023] [Indexed: 11/07/2023]
Abstract
OBJECTIVE Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease associated with upper and lower motor neuron degeneration and necrosis, characterized by progressive muscle weakness, atrophy, and paralysis. The FUS mutation-associated ALS has been classified as ALS6. We reported a case of ALS6 with de novo mutation and investigated retrospectively the characteristics of cases with FUS mutation. METHODS We reported a male patient with a new heterozygous variant of the FUS gene and comprehensively reviewed 173 ALS cases with FUS mutation. The literature was reviewed from the PubMed MEDLINE electronic database (https://www.ncbi.nlm.nih.gov/pubmed) using "Amyotrophic Lateral Sclerosis and Fus mutation" or "Fus mutation" as key words from 1 January 2009 to 1 January 2022. RESULTS We report a case of ALS6 with a new mutation point (c.1225-1227delGGA) and comprehensively review 173 ALS cases with FUS mutation. Though ALS6 is all with FUS mutation, it is still a highly heterogenous subtype. The average onset age of ALS6 is 35.2 ± 1.3 years, which is much lower than the average onset age of ALS (60 years old). Juvenile FUS mutations have an aggressive progression of disease, with an average time from onset to death or tracheostomy of 18.2 ± 0.5 months. FUS gene has the characteristics of early onset, faster progress, and shorter survival, especially in deletion mutation p.G504Wfs *12 and missense mutation of p.P525L. CONCLUSIONS ALS6 is a highly heterogenous subtype. Our study could allow clinicians to better understand the non-ALS typical symptoms, phenotypes, and pathophysiology of ALS6.
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Affiliation(s)
- Xin Xiao
- Department of Neurology, Yichang Central Hospital, Institute of Neural Regeneration and Repair, College of Basic Medical Science, China Three Gorges University, Yichang, China and
| | - Min Li
- Department of Neurology, Yichang Central Hospital, Institute of Neural Regeneration and Repair, College of Basic Medical Science, China Three Gorges University, Yichang, China and
- Third-grade Pharmacological Laboratory on Traditional Chinese Medicine, State Administration of Traditional Chinese Medicine, China Three Gorges University, Yichang, China
| | - Zhi Ye
- Department of Neurology, Yichang Central Hospital, Institute of Neural Regeneration and Repair, College of Basic Medical Science, China Three Gorges University, Yichang, China and
| | - Xiaoyan He
- Department of Neurology, Yichang Central Hospital, Institute of Neural Regeneration and Repair, College of Basic Medical Science, China Three Gorges University, Yichang, China and
| | - Jun Wei
- Department of Neurology, Yichang Central Hospital, Institute of Neural Regeneration and Repair, College of Basic Medical Science, China Three Gorges University, Yichang, China and
| | - Yunhong Zha
- Department of Neurology, Yichang Central Hospital, Institute of Neural Regeneration and Repair, College of Basic Medical Science, China Three Gorges University, Yichang, China and
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3
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Fare CM, Rhine K, Lam A, Myong S, Shorter J. A minimal construct of nuclear-import receptor Karyopherin-β2 defines the regions critical for chaperone and disaggregation activity. J Biol Chem 2023; 299:102806. [PMID: 36529289 PMCID: PMC9860449 DOI: 10.1016/j.jbc.2022.102806] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/02/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022] Open
Abstract
Karyopherin-β2 (Kapβ2) is a nuclear-import receptor that recognizes proline-tyrosine nuclear localization signals of diverse cytoplasmic cargo for transport to the nucleus. Kapβ2 cargo includes several disease-linked RNA-binding proteins with prion-like domains, such as FUS, TAF15, EWSR1, hnRNPA1, and hnRNPA2. These RNA-binding proteins with prion-like domains are linked via pathology and genetics to debilitating degenerative disorders, including amyotrophic lateral sclerosis, frontotemporal dementia, and multisystem proteinopathy. Remarkably, Kapβ2 prevents and reverses aberrant phase transitions of these cargoes, which is cytoprotective. However, the molecular determinants of Kapβ2 that enable these activities remain poorly understood, particularly from the standpoint of nuclear-import receptor architecture. Kapβ2 is a super-helical protein comprised of 20 HEAT repeats. Here, we design truncated variants of Kapβ2 and assess their ability to antagonize FUS aggregation and toxicity in yeast and FUS condensation at the pure protein level and in human cells. We find that HEAT repeats 8 to 20 of Kapβ2 recapitulate all salient features of Kapβ2 activity. By contrast, Kapβ2 truncations lacking even a single cargo-binding HEAT repeat display reduced activity. Thus, we define a minimal Kapβ2 construct for delivery in adeno-associated viruses as a potential therapeutic for amyotrophic lateral sclerosis/frontotemporal dementia, multisystem proteinopathy, and related disorders.
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Affiliation(s)
- Charlotte M Fare
- Department of Biochemistry and Biophysics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA; Biochemistry and Molecular Biophysics Graduate Group, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Kevin Rhine
- Program in Cell, Molecular, Developmental Biology, and Biophysics, Johns Hopkins University, Baltimore, Maryland, USA; Department of Biophysics, Johns Hopkins University, Baltimore, Maryland, USA
| | - Andrew Lam
- Department of Biochemistry and Biophysics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Sua Myong
- Program in Cell, Molecular, Developmental Biology, and Biophysics, Johns Hopkins University, Baltimore, Maryland, USA; Department of Biophysics, Johns Hopkins University, Baltimore, Maryland, USA
| | - James Shorter
- Department of Biochemistry and Biophysics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA; Biochemistry and Molecular Biophysics Graduate Group, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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4
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Goldstein O, Inbar T, Kedmi M, Gana-Weisz M, Abramovich B, Orr-Urtreger A, Drory VE. FUS-P525L Juvenile Amyotrophic Lateral Sclerosis and Intellectual Disability. Neurol Genet 2022; 8:e200009. [PMID: 35812163 PMCID: PMC9258982 DOI: 10.1212/nxg.0000000000200009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/10/2022] [Indexed: 11/25/2022]
Abstract
Background and Objectives Amyotrophic lateral sclerosis (ALS) is characterized by upper and lower motor neuron degeneration, with juvenile ALS (jALS) defined as disease with age at onset (AAO) before 25 years. We aimed to identify the genetic basis of 2 unrelated patients with jALS with very rapid deterioration and early age intellectual disability (ID) and to assess association of genetic findings with both phenotypes in a large cohort of patients with ALS and controls, and in the literature. Methods Exome sequencing was performed in 2 unrelated probands and their parents. Trio analyses included de novo, rare homozygosity, and compound heterozygosity analyses. A TaqMan genotyping assay was used to genotype ALS cohorts. A systematic literature review was conducted and additional information from authors obtained to assess prevalence of fused in sarcoma (FUS)-ALS associated with ID. Results A de novo mutation FUS-P525L was identified in both patients. Additional variations were identified in other genes related to intellectual disabilities. Among 8 additional unrelated juvenile patients, one carried the same FUS mutation and had a similar medical history of mild ID and fulminant ALS, whereas the others did not carry any FUS coding mutations and had no reported learning or intellectual disabilities (p = 0.0083). In addition, 486 patients with ALS with AAO ≥25 years were negative for this mutation. An extensive literature review showed that among all patients with FUS-related ALS with full phenotype reports, 10.3% exhibited additional learning/intellectual disabilities. Discussion FUS-P525L mutation was identified in 3 among 10 patients with jALS (30%) in our clinical cohort, all with a very aggressive disease course and ID. Together with literature reports, these results support a novel association between mutations in FUS and early life ID. Additional variations identified in genes related to ID and brain development in our patients (GPT2, DNAH10, and SCUBE2) may suggest a complex oligogenic inheritance for this phenotype. We propose that this mutation should be screened in patients with ALS with very early AAO, aggressive disease course, and sporadic occurrence, especially when ALS is accompanied by ID.
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5
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Fiondella L, Cavallieri F, Canali E, Cabboi MP, Marti A, Sireci F, Fiocchi A, Montanari G, Montepietra S, Valzania F. Co-Occurrence of Multiple Sclerosis and Amyotrophic Lateral Sclerosis in an FUS-Mutated Patient: A Case Report. Brain Sci 2022; 12:brainsci12050531. [PMID: 35624917 PMCID: PMC9139033 DOI: 10.3390/brainsci12050531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/09/2022] [Accepted: 04/19/2022] [Indexed: 12/26/2022] Open
Abstract
A concomitant presentation of relapsing remitting multiple sclerosis (RRMS) and amyotrophic lateral sclerosis (ALS) is quite rare. However, a review of the literature showed an increased co-occurrence of both diseases, including in genetically determined cases. We report the case of a 49-year-old woman with a history of RRMS who developed a progressive subacute loss of strength in her left arm. The patient’s father died from ALS, and her paternal uncle had Parkinson’s disease. Brain and cervical MRIs were performed, and new demyelinating lesions were excluded. Electromyography (EMG) of the upper limbs showed fibrillations and fasciculations in distal muscles of both arms. In the following months, the patient presented a progressive loss of strength in the proximal and distal muscles of the right arm and hyperreflexia in the lower limbs. EMG and central motor conduction were consistent with ALS. A genetic test was carried out, revealing a mutation in the FUS gene (exon 15; c. 1562 G>A). To our knowledge, the co-occurrence of MS and ALS in patients with FUS mutation is extremely rare. We hypothesize a common pathway for both diseases based on the possibility of a shared oligodendroglial dysfunction due to FUS mutation.
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Affiliation(s)
- Luigi Fiondella
- Neurology Unit, Neuromotor and Rehabilitation Department, AUSL-IRCCS of Reggio Emilia, 42123 Reggio Emilia, Italy; (F.C.); (E.C.); (M.P.C.); (A.M.); (F.S.); (S.M.); (F.V.)
- Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
- Correspondence: ; Tel.: +39-0522295569
| | - Francesco Cavallieri
- Neurology Unit, Neuromotor and Rehabilitation Department, AUSL-IRCCS of Reggio Emilia, 42123 Reggio Emilia, Italy; (F.C.); (E.C.); (M.P.C.); (A.M.); (F.S.); (S.M.); (F.V.)
- Clinical and Experimental Medicine PhD Program, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Elena Canali
- Neurology Unit, Neuromotor and Rehabilitation Department, AUSL-IRCCS of Reggio Emilia, 42123 Reggio Emilia, Italy; (F.C.); (E.C.); (M.P.C.); (A.M.); (F.S.); (S.M.); (F.V.)
| | - Maria Paola Cabboi
- Neurology Unit, Neuromotor and Rehabilitation Department, AUSL-IRCCS of Reggio Emilia, 42123 Reggio Emilia, Italy; (F.C.); (E.C.); (M.P.C.); (A.M.); (F.S.); (S.M.); (F.V.)
| | - Alessandro Marti
- Neurology Unit, Neuromotor and Rehabilitation Department, AUSL-IRCCS of Reggio Emilia, 42123 Reggio Emilia, Italy; (F.C.); (E.C.); (M.P.C.); (A.M.); (F.S.); (S.M.); (F.V.)
| | - Francesca Sireci
- Neurology Unit, Neuromotor and Rehabilitation Department, AUSL-IRCCS of Reggio Emilia, 42123 Reggio Emilia, Italy; (F.C.); (E.C.); (M.P.C.); (A.M.); (F.S.); (S.M.); (F.V.)
| | - Alena Fiocchi
- Physical Medicine and Rehabilitation Unit, AUSL-IRCCS of Reggio Emilia, 42123 Reggio Emilia, Italy;
| | - Gloria Montanari
- Pneumology Unit, AUSL-IRCCS of Reggio Emilia, 42123 Reggio Emilia, Italy;
| | - Sara Montepietra
- Neurology Unit, Neuromotor and Rehabilitation Department, AUSL-IRCCS of Reggio Emilia, 42123 Reggio Emilia, Italy; (F.C.); (E.C.); (M.P.C.); (A.M.); (F.S.); (S.M.); (F.V.)
| | - Franco Valzania
- Neurology Unit, Neuromotor and Rehabilitation Department, AUSL-IRCCS of Reggio Emilia, 42123 Reggio Emilia, Italy; (F.C.); (E.C.); (M.P.C.); (A.M.); (F.S.); (S.M.); (F.V.)
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6
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Choi HW. Fasciculations in Children. Pediatr Neurol 2021; 125:40-47. [PMID: 34628142 DOI: 10.1016/j.pediatrneurol.2021.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 08/19/2021] [Accepted: 08/28/2021] [Indexed: 11/26/2022]
Abstract
Fasciculations are the most common form of spontaneous muscle contraction. They frequently occur in healthy individuals. However, there are a minority of situations that fasciculations are observed in association with specific neurologic disorders. Publications concerning the evaluation of pediatric patients experiencing fasciculations are limited. These children may undergo invasive or expensive diagnostic investigations that are unnecessary. Moreover, without careful consideration of differential diagnoses, rare neuromuscular disorders that present with fasciculations in the pediatric age group can be under-recognized by pediatric neurologists. This review examines the most important pediatric disorders presenting with fasciculations and other spontaneous muscle contractions to guide pediatric neurologists in evaluating these children.
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Affiliation(s)
- Hyoung Won Choi
- Division of Pediatric Neurology, University of Pittsburgh Medical Center Children's Hospital of Pittsburgh, Lemoyne, Pennsylvania.
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7
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Zhang X, Wang F, Hu Y, Chen R, Meng D, Guo L, Lv H, Guan J, Jia Y. In vivo stress granule misprocessing evidenced in a FUS knock-in ALS mouse model. Brain 2020; 143:1350-1367. [PMID: 32358598 DOI: 10.1093/brain/awaa076] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 01/10/2020] [Accepted: 02/02/2020] [Indexed: 12/13/2022] Open
Abstract
Many RNA-binding proteins, including TDP-43, FUS, and TIA1, are stress granule components, dysfunction of which causes amyotrophic lateral sclerosis (ALS). However, whether a mutant RNA-binding protein disrupts stress granule processing in vivo in pathogenesis is unknown. Here we establish a FUS ALS mutation, p.R521C, knock-in mouse model that carries impaired motor ability and late-onset motor neuron loss. In disease-susceptible neurons, stress induces mislocalization of mutant FUS into stress granules and upregulation of ubiquitin, two hallmarks of disease pathology. Additionally, stress aggravates motor performance decline in the mutant mouse. By using two-photon imaging in TIA1-EGFP transduced animals, we document more intensely TIA1-EGFP-positive granules formed hours but cleared weeks after stress challenge in neurons in the mutant cortex. Moreover, neurons with severe granule misprocessing die days after stress challenge. Therefore, we argue that stress granule misprocessing is pathogenic in ALS, and the model we provide here is sound for further disease mechanistic study.
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Affiliation(s)
- Xue Zhang
- Tsinghua-Peking Joint Center for Life Science, Beijing, China.,School of Life Sciences, Tsinghua University, Beijing, China.,School of Medicine, Medical Science Building, Room D204, Tsinghua University, Beijing, China.,IDG/McGovern Institute for Brain Research at Tsinghua Beijing, China
| | - Fengchao Wang
- Animal core facility, National Institute of Biological Sciences, Beijing, China
| | - Yi Hu
- School of Life Sciences, Tsinghua University, Beijing, China.,IDG/McGovern Institute for Brain Research at Tsinghua Beijing, China
| | - Runze Chen
- Tsinghua-Peking Joint Center for Life Science, Beijing, China.,School of Life Sciences, Tsinghua University, Beijing, China.,School of Medicine, Medical Science Building, Room D204, Tsinghua University, Beijing, China.,IDG/McGovern Institute for Brain Research at Tsinghua Beijing, China
| | - Dawei Meng
- Tsinghua-Peking Joint Center for Life Science, Beijing, China.,School of Life Sciences, Tsinghua University, Beijing, China.,School of Medicine, Medical Science Building, Room D204, Tsinghua University, Beijing, China.,IDG/McGovern Institute for Brain Research at Tsinghua Beijing, China
| | - Liang Guo
- Tsinghua-Peking Joint Center for Life Science, Beijing, China.,School of Life Sciences, Tsinghua University, Beijing, China.,School of Medicine, Medical Science Building, Room D204, Tsinghua University, Beijing, China.,IDG/McGovern Institute for Brain Research at Tsinghua Beijing, China
| | - Hailong Lv
- Tsinghua-Peking Joint Center for Life Science, Beijing, China.,School of Life Sciences, Tsinghua University, Beijing, China.,School of Medicine, Medical Science Building, Room D204, Tsinghua University, Beijing, China.,IDG/McGovern Institute for Brain Research at Tsinghua Beijing, China
| | - Jisong Guan
- School of Life Science and Technology, Shanghai Tech University, Shanghai, China
| | - Yichang Jia
- Tsinghua-Peking Joint Center for Life Science, Beijing, China.,School of Medicine, Medical Science Building, Room D204, Tsinghua University, Beijing, China.,IDG/McGovern Institute for Brain Research at Tsinghua Beijing, China
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8
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Strong MJ, Donison NS, Volkening K. Alterations in Tau Metabolism in ALS and ALS-FTSD. Front Neurol 2020; 11:598907. [PMID: 33329356 PMCID: PMC7719764 DOI: 10.3389/fneur.2020.598907] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 10/27/2020] [Indexed: 12/15/2022] Open
Abstract
There is increasing acceptance that amyotrophic lateral sclerosis (ALS), classically considered a neurodegenerative disease affecting almost exclusively motor neurons, is syndromic with both clinical and biological heterogeneity. This is most evident in its association with a broad range of neuropsychological, behavioral, speech and language deficits [collectively termed ALS frontotemporal spectrum disorder (ALS-FTSD)]. Although the most consistent pathology of ALS and ALS-FTSD is a disturbance in TAR DNA binding protein 43 kDa (TDP-43) metabolism, alterations in microtubule-associated tau protein (tau) metabolism can also be observed in ALS-FTSD, most prominently as pathological phosphorylation at Thr175 (pThr175tau). pThr175 has been shown to promote exposure of the phosphatase activating domain (PAD) in the tau N-terminus with the consequent activation of GSK3β mediated phosphorylation at Thr231 (pThr231tau) leading to pathological oligomer formation. This pathological cascade of tau phosphorylation has been observed in chronic traumatic encephalopathy with ALS (CTE-ALS) and in both in vivo and in vitro experimental paradigms, suggesting that it is of critical relevance to the pathobiology of ALS-FTSD. It is also evident that the co-existence of alterations in the metabolism of TDP-43 and tau acts synergistically in a rodent model to exacerbate the pathology of either.
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Affiliation(s)
- Michael J Strong
- Molecular Medicine, Schulich School of Medicine and Dentistry, Robarts Research Institute, Western University, London, ON, Canada.,Department of Clinical Neurological Sciences, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Neil S Donison
- Molecular Medicine, Schulich School of Medicine and Dentistry, Robarts Research Institute, Western University, London, ON, Canada.,Neuroscience Graduate Program, Western University, London, ON, Canada
| | - Kathryn Volkening
- Molecular Medicine, Schulich School of Medicine and Dentistry, Robarts Research Institute, Western University, London, ON, Canada.,Department of Clinical Neurological Sciences, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
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9
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Ungaro C, Sprovieri T, Morello G, Perrone B, Spampinato AG, Simone IL, Trojsi F, Monsurrò MR, Spataro R, La Bella V, Andò S, Cavallaro S, Conforti FL. Genetic investigation of amyotrophic lateral sclerosis patients in south Italy: a two-decade analysis. Neurobiol Aging 2020; 99:99.e7-99.e14. [PMID: 32951934 DOI: 10.1016/j.neurobiolaging.2020.08.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 07/21/2020] [Accepted: 08/22/2020] [Indexed: 10/23/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a multifactorial disease characterized by the interplay of genetic and environmental factors. In the majority of cases, ALS is sporadic, whereas familial forms occur in less than 10% of patients. Herein, we present the results of molecular analyses performed in a large cohort of Italian ALS patients, focusing on novel and already described variations in ALS-linked genes. Our analysis revealed that more than 10% of tested patients carried a mutation in one of the major ALS genes, with C9orf72 hexanucleotide expansion being the most common mutation. In addition, our study confirmed a significant association between ALS patients carrying the ATNX-1 intermediate repeat and the pathological C9orf72 expansion, supporting the involvement of this risk factor in neuronal degeneration. Overall, our study broadens the known mutational spectrum in ALS and provides new insights for a more accurate view of the genetic pattern of the disease.
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Affiliation(s)
- Carmine Ungaro
- Department of Earth and Environment, Institute of Atmospheric Pollution (IIA), National Research Council (CNR), Rende (CS), Italy
| | - Teresa Sprovieri
- Department of Earth and Environment, Institute of Atmospheric Pollution (IIA), National Research Council (CNR), Rende (CS), Italy
| | - Giovanna Morello
- Department of Biomedical Science, Institute for Research and Biomedical Innovation (IRIB), National Research Council (CNR), Catania, Italy
| | - Benedetta Perrone
- Department of Pharmacy and Health and Nutritional Sciences, University of Calabria, Rende (CS), Italy
| | - Antonio Gianmaria Spampinato
- Department of Biomedical Science, Institute for Research and Biomedical Innovation (IRIB), National Research Council (CNR), Catania, Italy
| | - Isabella Laura Simone
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari, Bari, Italy
| | - Francesca Trojsi
- Department of Advanced Medical and Surgical Sciences, MRI Research Center SUN-FISM, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Maria Rosaria Monsurrò
- Department of Advanced Medical and Surgical Sciences, MRI Research Center SUN-FISM, University of Campania "Luigi Vanvitelli", Naples, Italy
| | | | - Vincenzo La Bella
- Department of Experimental Biomedicine and Clinical Neurosciences, ALS Clinical Research Center and Laboratory of Neurochemistry, University of Palermo, Palermo, Italy
| | - Sebastiano Andò
- Department of Pharmacy and Health and Nutritional Sciences, University of Calabria, Rende (CS), Italy; Centro Sanitario, Università della Calabria, Rende (CS), Italy
| | - Sebastiano Cavallaro
- Department of Biomedical Science, Institute for Research and Biomedical Innovation (IRIB), National Research Council (CNR), Catania, Italy
| | - Francesca Luisa Conforti
- Department of Pharmacy and Health and Nutritional Sciences, University of Calabria, Rende (CS), Italy.
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10
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Lin J, Chen W, Huang P, Xie Y, Zheng M, Yao X. The distinct manifestation of young-onset amyotrophic lateral sclerosis in China. Amyotroph Lateral Scler Frontotemporal Degener 2020; 22:30-37. [DOI: 10.1080/21678421.2020.1797091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Jianing Lin
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou, China
| | - Weineng Chen
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou, China
| | - Pian Huang
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou, China
| | - Youna Xie
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou, China
| | - Minying Zheng
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou, China
| | - Xiaoli Yao
- Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University; Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou, China
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11
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Perrone B, Conforti FL. Common mutations of interest in the diagnosis of amyotrophic lateral sclerosis: how common are common mutations in ALS genes? Expert Rev Mol Diagn 2020; 20:703-714. [PMID: 32497448 DOI: 10.1080/14737159.2020.1779060] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
INTRODUCTION Amyotrophic lateral sclerosis (ALS) is a complex neurodegenerative disease predominantly affecting upper and lower motor neurons. Diagnosis of this devastating pathology is very difficult because the high degree of clinical heterogeneity with which it occurs and until now, no truly effective treatment exists. AREAS COVERED Molecular diagnosis may be a valuable tool for dissecting out ALS complex heterogeneity and for identifying new molecular mechanisms underlying the characteristic selective degeneration and death of motor neurons. To date, pathogenic variants in ALS genes are known to be present in up to 70% of familial and 10% of apparently sporadic ALS cases and can be associated with risks for ALS only or risks for other neurodegenerative diseases. This paper shows the procedure currently used in diagnostic laboratories to investigate most frequent mutations in ALS and evaluating the utility of involved molecular techniques as potential tools to discriminate 'common mutations' in ALS patients. EXPERT OPINION Genetic testing may allow for establishing an accurate pathological diagnosis and a more precise stratification of patient groups in future drug trials.
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Affiliation(s)
- Benedetta Perrone
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria , Arcavacata di Rende (Cosenza), Italy
| | - Francesca Luisa Conforti
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria , Arcavacata di Rende (Cosenza), Italy
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12
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Zhou B, Wang H, Cai Y, Wen H, Wang L, Zhu M, Chen Y, Yu Y, Lu X, Zhou M, Fang P, Li X, Hong D. FUS P525L mutation causing amyotrophic lateral sclerosis and movement disorders. Brain Behav 2020; 10:e01625. [PMID: 32307925 PMCID: PMC7303404 DOI: 10.1002/brb3.1625] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 03/08/2020] [Accepted: 03/20/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Mutations in the fused in sarcoma (FUS) gene have been associated with amyotrophic lateral sclerosis (ALS), frontotemporal lobar degeneration, and essential tremor. Among the FUS mutations, p.P525L as a hot spot variant has been reported in more than 20 patients with ALS. Apart from the typical ALS phenotype, patients with p.P525L mutation exhibit some atypical symptoms. However, movement disorders related to p.P525L mutation have not been emphasized currently. METHODS Two unrelated patients with ALS were evaluated through a set of clinical and laboratory tests. The genetic screening was performed through next-generation sequencing. Muscle biopsies were performed on the 2 patients. Muscle samples were stained according to standard histological and immunohistochemical procedures. RESULTS The first patient presented with juvenile-onset neurogenic weakness and wasting and simultaneously had dropped head, ophthalmoplegia, tremor, involuntary movements, and cognitive impairments. The second patient showed a typical ALS phenotype and prominent adventitious movements. Genetic screening disclosed de novo p.P525L FUS mutation in the 2 patients by family cosegregation analysis. Muscle biopsy showed neurogenic patterns and numerous lipid droplets aggregating in the fibers. CONCLUSION Apart from the typical ALS phenotype, patients with p.P525L mutation in the FUS gene can present with great clinical heterogeneity including multiple movement disorders. Numerous lipid droplets in muscle fibers indicate that skeletal muscle is likely an important therapeutic target for ALS.
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Affiliation(s)
- Binbin Zhou
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Huan Wang
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yu Cai
- Department of Diagnostic Center, Ascension Seton Medical Center Austin, Austin, TX, USA
| | - Han Wen
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Lulu Wang
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Min Zhu
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yunqing Chen
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yanyan Yu
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xi Lu
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Meihong Zhou
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Pu Fang
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xiaobing Li
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Daojun Hong
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, China
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Chen C, Ding X, Akram N, Xue S, Luo SZ. Fused in Sarcoma: Properties, Self-Assembly and Correlation with Neurodegenerative Diseases. Molecules 2019; 24:molecules24081622. [PMID: 31022909 PMCID: PMC6514960 DOI: 10.3390/molecules24081622] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/12/2019] [Accepted: 04/17/2019] [Indexed: 12/13/2022] Open
Abstract
Fused in sarcoma (FUS) is a DNA/RNA binding protein that is involved in RNA metabolism and DNA repair. Numerous reports have demonstrated by pathological and genetic analysis that FUS is associated with a variety of neurodegenerative diseases, including amyotrophic lateral sclerosis (ALS), frontotemporal lobar degeneration (FTLD), and polyglutamine diseases. Traditionally, the fibrillar aggregation of FUS was considered to be the cause of those diseases, especially via its prion-like domains (PrLDs), which are rich in glutamine and asparagine residues. Lately, a nonfibrillar self-assembling phenomenon, liquid–liquid phase separation (LLPS), was observed in FUS, and studies of its functions, mechanism, and mutual transformation with pathogenic amyloid have been emerging. This review summarizes recent studies on FUS self-assembling, including both aggregation and LLPS as well as their relationship with the pathology of ALS, FTLD, and other neurodegenerative diseases.
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Affiliation(s)
- Chen Chen
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Xiufang Ding
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Nimrah Akram
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Song Xue
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Shi-Zhong Luo
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
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14
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Eura N, Sugie K, Suzuki N, Kiriyama T, Izumi T, Shimakura N, Kato M, Aoki M. A juvenile sporadic amyotrophic lateral sclerosis case with P525L mutation in the FUS gene: A rare co-occurrence of autism spectrum disorder and tremor. J Neurol Sci 2019; 398:67-68. [PMID: 30684766 DOI: 10.1016/j.jns.2019.01.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 01/15/2019] [Accepted: 01/17/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Nobuyuki Eura
- Department of Neurology, Nara Medical University School of Medicine, Kashihara, Nara, Japan.
| | - Kazuma Sugie
- Department of Neurology, Nara Medical University School of Medicine, Kashihara, Nara, Japan.
| | - Naoki Suzuki
- Department of Neurology, Tohoku University, Sendai, Miyagi, Japan.
| | - Takao Kiriyama
- Department of Neurology, Nara Medical University School of Medicine, Kashihara, Nara, Japan.
| | - Tesseki Izumi
- Department of Neurology, Nara Medical University School of Medicine, Kashihara, Nara, Japan.
| | - Naoko Shimakura
- Department of Neurology, Tohoku University, Sendai, Miyagi, Japan.
| | - Masaaki Kato
- Department of Neurology, Tohoku University, Sendai, Miyagi, Japan.
| | - Masashi Aoki
- Department of Neurology, Tohoku University, Sendai, Miyagi, Japan.
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15
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Kuang L, Kamelgarn M, Arenas A, Gal J, Taylor D, Gong W, Brown M, St Clair D, Kasarskis EJ, Zhu H. Clinical and experimental studies of a novel P525R FUS mutation in amyotrophic lateral sclerosis. NEUROLOGY-GENETICS 2017; 3:e172. [PMID: 28812062 PMCID: PMC5546284 DOI: 10.1212/nxg.0000000000000172] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/16/2017] [Indexed: 12/13/2022]
Abstract
Objective: To describe the clinical features of a novel fused in sarcoma (FUS) mutation in a young adult female amyotrophic lateral sclerosis (ALS) patient with rapid progression of weakness and to experimentally validate the consequences of the P525R mutation in cellular neuronal models. Methods: We conducted sequencing of genomic DNA from the index patient and her family members. Immunocytochemistry was performed in various cellular models to determine whether the newly identified P525R mutant FUS protein accumulated in cytoplasmic inclusions. Clinical features of the index patient were compared with 19 other patients with ALS carrying the P525L mutation in the same amino acid position. Results: A novel mutation c.1574C>G (p.525P>R) in the FUS gene was identified in the index patient. The clinical symptoms are similar to those in familial ALS patients with the P525L mutation at the same position. The P525R mutant FUS protein showed cytoplasmic localization and formed large stress granule–like cytoplasmic inclusions in multiple cellular models. Conclusions: The clinical features of the patient and the cytoplasmic inclusions of the P525R mutant FUS protein strengthen the notion that mutations at position 525 of the FUS protein result in a coherent phenotype characterized by juvenile or young adult onset, rapid progression, variable positive family history, and female preponderance.
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Affiliation(s)
- Lisha Kuang
- Molecular and Cellular Biochemistry (L.K., J.G., H.Z.), Department of Toxicology and Cancer Biology (M.K., A.A., D.S.C., H.Z.), and Department of Neurology (D.T., E.J.K.), College of Medicine, University of Kentucky, Lexington; Hefei National Laboratory for Physical Sciences at the Microscale (W.G.), University of Science and Technology of China, Anhui; Department of Neurology (M.B.), University of Louisville; and Research and Development (E.J.K., H.Z.), Lexington VA Medical Center, KY
| | - Marisa Kamelgarn
- Molecular and Cellular Biochemistry (L.K., J.G., H.Z.), Department of Toxicology and Cancer Biology (M.K., A.A., D.S.C., H.Z.), and Department of Neurology (D.T., E.J.K.), College of Medicine, University of Kentucky, Lexington; Hefei National Laboratory for Physical Sciences at the Microscale (W.G.), University of Science and Technology of China, Anhui; Department of Neurology (M.B.), University of Louisville; and Research and Development (E.J.K., H.Z.), Lexington VA Medical Center, KY
| | - Alexandra Arenas
- Molecular and Cellular Biochemistry (L.K., J.G., H.Z.), Department of Toxicology and Cancer Biology (M.K., A.A., D.S.C., H.Z.), and Department of Neurology (D.T., E.J.K.), College of Medicine, University of Kentucky, Lexington; Hefei National Laboratory for Physical Sciences at the Microscale (W.G.), University of Science and Technology of China, Anhui; Department of Neurology (M.B.), University of Louisville; and Research and Development (E.J.K., H.Z.), Lexington VA Medical Center, KY
| | - Jozsef Gal
- Molecular and Cellular Biochemistry (L.K., J.G., H.Z.), Department of Toxicology and Cancer Biology (M.K., A.A., D.S.C., H.Z.), and Department of Neurology (D.T., E.J.K.), College of Medicine, University of Kentucky, Lexington; Hefei National Laboratory for Physical Sciences at the Microscale (W.G.), University of Science and Technology of China, Anhui; Department of Neurology (M.B.), University of Louisville; and Research and Development (E.J.K., H.Z.), Lexington VA Medical Center, KY
| | - Deborah Taylor
- Molecular and Cellular Biochemistry (L.K., J.G., H.Z.), Department of Toxicology and Cancer Biology (M.K., A.A., D.S.C., H.Z.), and Department of Neurology (D.T., E.J.K.), College of Medicine, University of Kentucky, Lexington; Hefei National Laboratory for Physical Sciences at the Microscale (W.G.), University of Science and Technology of China, Anhui; Department of Neurology (M.B.), University of Louisville; and Research and Development (E.J.K., H.Z.), Lexington VA Medical Center, KY
| | - Weiming Gong
- Molecular and Cellular Biochemistry (L.K., J.G., H.Z.), Department of Toxicology and Cancer Biology (M.K., A.A., D.S.C., H.Z.), and Department of Neurology (D.T., E.J.K.), College of Medicine, University of Kentucky, Lexington; Hefei National Laboratory for Physical Sciences at the Microscale (W.G.), University of Science and Technology of China, Anhui; Department of Neurology (M.B.), University of Louisville; and Research and Development (E.J.K., H.Z.), Lexington VA Medical Center, KY
| | - Martin Brown
- Molecular and Cellular Biochemistry (L.K., J.G., H.Z.), Department of Toxicology and Cancer Biology (M.K., A.A., D.S.C., H.Z.), and Department of Neurology (D.T., E.J.K.), College of Medicine, University of Kentucky, Lexington; Hefei National Laboratory for Physical Sciences at the Microscale (W.G.), University of Science and Technology of China, Anhui; Department of Neurology (M.B.), University of Louisville; and Research and Development (E.J.K., H.Z.), Lexington VA Medical Center, KY
| | - Daret St Clair
- Molecular and Cellular Biochemistry (L.K., J.G., H.Z.), Department of Toxicology and Cancer Biology (M.K., A.A., D.S.C., H.Z.), and Department of Neurology (D.T., E.J.K.), College of Medicine, University of Kentucky, Lexington; Hefei National Laboratory for Physical Sciences at the Microscale (W.G.), University of Science and Technology of China, Anhui; Department of Neurology (M.B.), University of Louisville; and Research and Development (E.J.K., H.Z.), Lexington VA Medical Center, KY
| | - Edward J Kasarskis
- Molecular and Cellular Biochemistry (L.K., J.G., H.Z.), Department of Toxicology and Cancer Biology (M.K., A.A., D.S.C., H.Z.), and Department of Neurology (D.T., E.J.K.), College of Medicine, University of Kentucky, Lexington; Hefei National Laboratory for Physical Sciences at the Microscale (W.G.), University of Science and Technology of China, Anhui; Department of Neurology (M.B.), University of Louisville; and Research and Development (E.J.K., H.Z.), Lexington VA Medical Center, KY
| | - Haining Zhu
- Molecular and Cellular Biochemistry (L.K., J.G., H.Z.), Department of Toxicology and Cancer Biology (M.K., A.A., D.S.C., H.Z.), and Department of Neurology (D.T., E.J.K.), College of Medicine, University of Kentucky, Lexington; Hefei National Laboratory for Physical Sciences at the Microscale (W.G.), University of Science and Technology of China, Anhui; Department of Neurology (M.B.), University of Louisville; and Research and Development (E.J.K., H.Z.), Lexington VA Medical Center, KY
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Gromicho M, Oliveira Santos M, Pinto A, Pronto-Laborinho A, De Carvalho M. Young-onset rapidly progressive ALS associated with heterozygous FUS mutation. Amyotroph Lateral Scler Frontotemporal Degener 2017; 18:451-453. [PMID: 28288521 DOI: 10.1080/21678421.2017.1299762] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We report a 36-years-old Cape Verdean man who presented with respiratory insufficiency due to rapidly progressive sporadic amyotrophic lateral sclerosis (ALS), in whom FUS mutation c.1551C > G (p.Hist517Gln) in heterozygosity was identified, a finding previously described as non-pathogenic. The only previous report on this mutation was in a family from Cape Verde in which four members developed ALS; all were homozygous for the mutation. This case shows that this FUS mutation presents a highly variable penetrance and expressivity.
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Affiliation(s)
- Marta Gromicho
- a Instituto de Medicina Molecular and Instituto de Fisiologia, Faculdade de Medicina, Universidade de Lisboa , Lisbon , Portugal and
| | - Miguel Oliveira Santos
- a Instituto de Medicina Molecular and Instituto de Fisiologia, Faculdade de Medicina, Universidade de Lisboa , Lisbon , Portugal and.,b Department of Neurosciences and Mental Health , Hospital de Santa Maria - CHLN , Lisbon , Portugal
| | - Anabela Pinto
- a Instituto de Medicina Molecular and Instituto de Fisiologia, Faculdade de Medicina, Universidade de Lisboa , Lisbon , Portugal and.,b Department of Neurosciences and Mental Health , Hospital de Santa Maria - CHLN , Lisbon , Portugal
| | - Ana Pronto-Laborinho
- a Instituto de Medicina Molecular and Instituto de Fisiologia, Faculdade de Medicina, Universidade de Lisboa , Lisbon , Portugal and
| | - Mamede De Carvalho
- a Instituto de Medicina Molecular and Instituto de Fisiologia, Faculdade de Medicina, Universidade de Lisboa , Lisbon , Portugal and.,b Department of Neurosciences and Mental Health , Hospital de Santa Maria - CHLN , Lisbon , Portugal
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17
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Krüger S, Battke F, Sprecher A, Munz M, Synofzik M, Schöls L, Gasser T, Grehl T, Prudlo J, Biskup S. Rare Variants in Neurodegeneration Associated Genes Revealed by Targeted Panel Sequencing in a German ALS Cohort. Front Mol Neurosci 2016; 9:92. [PMID: 27790088 PMCID: PMC5061735 DOI: 10.3389/fnmol.2016.00092] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 09/20/2016] [Indexed: 12/11/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a progressive fatal multisystemic neurodegenerative disorder caused by preferential degeneration of upper and lower motor neurons. To further delineate the genetic architecture of the disease, we used comprehensive panel sequencing in a cohort of 80 German ALS patients. The panel covered 39 confirmed ALS genes and candidate genes, as well as 238 genes associated with other entities of the neurodegenerative disease spectrum. In addition, we performed repeat length analysis for C9orf72. Our aim was to (1) identify potentially disease-causing variants, to (2) assess a proposed model of polygenic inheritance in ALS and to (3) connect ALS with other neurodegenerative entities. We identified 79 rare potentially pathogenic variants in 27 ALS associated genes in familial and sporadic cases. Five patients had pathogenic C9orf72 repeat expansions, a further four patients harbored intermediate length repeat expansions. Our findings demonstrate that a genetic background of the disease can actually be found in a large proportion of seemingly sporadic cases and that it is not limited to putative most frequently affected genes such as C9orf72 or SOD1. Assessing the polygenic nature of ALS, we identified 15 patients carrying at least two rare potentially pathogenic variants in ALS associated genes including pathogenic or intermediate C9orf72 repeat expansions. Multiple variants might influence severity or duration of disease or could account for intrafamilial phenotypic variability or reduced penetrance. However, we could not observe a correlation with age of onset in this study. We further detected potentially pathogenic variants in other neurodegeneration associated genes in 12 patients, supporting the hypothesis of common pathways in neurodegenerative diseases and linking ALS to other entities of the neurodegenerative spectrum. Most interestingly we found variants in GBE1 and SPG7 which might represent differential diagnoses. Based on our findings, we recommend two-staged genetic testing for ALS in Germany in patients with familial and sporadic ALS, comprising C9orf72 repeat analysis followed by comprehensive panel sequencing including differential diagnoses that impair motor neuron function to meet the complexity of ALS genetics.
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Affiliation(s)
- Stefanie Krüger
- CeGaT GmbH, Center for Genomics and Transcriptomics Tübingen, Germany
| | - Florian Battke
- CeGaT GmbH, Center for Genomics and Transcriptomics Tübingen, Germany
| | - Andrea Sprecher
- CeGaT GmbH, Center for Genomics and Transcriptomics Tübingen, Germany
| | - Marita Munz
- CeGaT GmbH, Center for Genomics and TranscriptomicsTübingen, Germany; Department of Neurodegenerative Diseases, Hertie-Institute for Clinical Brain Research, University of TübingenTübingen, Germany
| | - Matthis Synofzik
- Department of Neurodegenerative Diseases, Hertie-Institute for Clinical Brain Research, University of TübingenTübingen, Germany; German Research Center for Neurodegenerative DiseasesTübingen, Germany
| | - Ludger Schöls
- Department of Neurodegenerative Diseases, Hertie-Institute for Clinical Brain Research, University of TübingenTübingen, Germany; German Research Center for Neurodegenerative DiseasesTübingen, Germany
| | - Thomas Gasser
- Department of Neurodegenerative Diseases, Hertie-Institute for Clinical Brain Research, University of TübingenTübingen, Germany; German Research Center for Neurodegenerative DiseasesTübingen, Germany
| | - Torsten Grehl
- Department of Neurology, BG-Kliniken Bergmannsheil GmbH, Ruhr-University Bochum Bochum, Germany
| | - Johannes Prudlo
- Department of Neurology, University of RostockRostock, Germany; German Research Center for Neurodegenerative DiseasesRostock, Germany
| | - Saskia Biskup
- CeGaT GmbH, Center for Genomics and TranscriptomicsTübingen, Germany; Department of Neurodegenerative Diseases, Hertie-Institute for Clinical Brain Research, University of TübingenTübingen, Germany
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18
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Screening of SOD1, FUS and TARDBP genes in patients with amyotrophic lateral sclerosis in central-southern China. Sci Rep 2016; 6:32478. [PMID: 27604643 PMCID: PMC5015023 DOI: 10.1038/srep32478] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/08/2016] [Indexed: 01/26/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease affecting motor neurons of the brain, brainstem and spinal cord. To date, mutations in more than 30 genes have been linked to the pathogenesis of ALS. Among them, SOD1, FUS and TARDBP are ranked as the three most common genes associated with ALS. However, no mutation analysis has been reported in central-southern China. In this study, we sequenced SOD1, FUS and TARDBP in a central-southern Chinese cohort of 173 patients with ALS (15 familial ALS and 158 sporadic ALS) to detect mutations. As a result, five missense mutations in SOD1, namely, p.D101N, p.D101G, p.C111Y, p.N86S and p.V87A, were identified in three unrelated familial probands and three sporadic cases; two mutations in FUS were found in two unrelated familial probands, including an insertion mutation (p.P525_Y526insY) and a missense mutation (p.R521H); no variants of TARDBP were observed in patients. Therefore, SOD1 mutations were present in 20.0% of familial ALS patients and 1.9% of sporadic ALS patients, while FUS mutations were responsible for 13.3% of familial ALS cases, and TARDBP mutations were rare in either familial or sporadic ALS cases. This study broadens the known mutational spectrum in patients with ALS and further demonstrates the necessity for genetic screening in ALS patients from central-southern China.
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Hirayanagi K, Sato M, Furuta N, Makioka K, Ikeda Y. Juvenile-onset Sporadic Amyotrophic Lateral Sclerosis with a Frameshift FUS Gene Mutation Presenting Unique Neuroradiological Findings and Cognitive Impairment. Intern Med 2016; 55:689-93. [PMID: 26984092 DOI: 10.2169/internalmedicine.55.5569] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 24-year-old Japanese woman developed anterocollis, weakness of the proximal arms, and subsequent cognitive impairment. A neurological examination revealed amyotrophic lateral sclerosis (ALS) without a family history. Systemic muscle atrophy progressed rapidly. Cerebral MRI clearly exhibited high signal intensities along the bilateral pyramidal tracts. An analysis of the FUS gene revealed a heterozygous two-base pair deletion, c.1507-1508delAG (p.G504WfsX515). A subset of juvenile-onset familial/sporadic ALS cases with FUS gene mutations reportedly demonstrates mental retardation or learning difficulty. Our study emphasizes the importance of conducting a FUS gene analysis in juvenile-onset ALS cases, even when no family occurrence is confirmed.
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20
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Hübers A, Just W, Rosenbohm A, Müller K, Marroquin N, Goebel I, Högel J, Thiele H, Altmüller J, Nürnberg P, Weishaupt JH, Kubisch C, Ludolph AC, Volk AE. De novo FUS mutations are the most frequent genetic cause in early-onset German ALS patients. Neurobiol Aging 2015; 36:3117.e1-3117.e6. [PMID: 26362943 DOI: 10.1016/j.neurobiolaging.2015.08.005] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 07/15/2015] [Accepted: 08/08/2015] [Indexed: 01/27/2023]
Abstract
In amyotrophic lateral sclerosis (ALS) patients with known genetic cause, mutations in chromosome 9 open reading frame 72 (C9orf72) and superoxide dismutase 1 (SOD1) account for most familial and late-onset sporadic cases, whereas mutations in fused in sarcoma (FUS) can be identified in just around 5% of familial and 1% of overall sporadic cases. There are only few reports on de novo FUS mutations in juvenile ALS patients. To date, no systematic evaluation on the frequency of de novo FUS mutations in early-onset ALS patients has been conducted. Here, we screened a cohort of 14 early-onset sporadic ALS patients (onset age <35 years) to determine the frequency of mutations in C9orf72, SOD1, and FUS in this defined patient cohort. All patients were recruited prospectively by a single center in a period of 38 months. No mutations were detected in SOD1 or C9orf72; however, we identified 6 individuals (43%) carrying a heterozygous FUS mutation including 1 mutation that has not been described earlier (c.1504delG [p.Asp502Thrfs*27]). Genetic testing of parents was possible in 5 families and revealed that the mutations in these patients arose de novo. Three of the 6 identified patients presented with initial bulbar symptoms. Our study identifies FUS mutations as the most frequent genetic cause in early-onset ALS. Genetic testing of FUS thus seems indicated in sporadic early-onset ALS patients especially if showing predominant bulbar symptoms and an aggressive disease course.
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Affiliation(s)
- Annemarie Hübers
- Department of Neurology, University Hospital of Ulm, Ulm, Germany.
| | - Walter Just
- Institute of Human Genetics, University of Ulm, Ulm, Germany
| | - Angela Rosenbohm
- Department of Neurology, University Hospital of Ulm, Ulm, Germany
| | - Kathrin Müller
- Department of Neurology, University Hospital of Ulm, Ulm, Germany
| | | | - Ingrid Goebel
- Institute of Human Genetics, University of Ulm, Ulm, Germany; Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Josef Högel
- Institute of Human Genetics, University of Ulm, Ulm, Germany
| | - Holger Thiele
- Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
| | - Janine Altmüller
- Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany; Institute of Human Genetics, University of Cologne, Cologne, Germany
| | - Peter Nürnberg
- Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany; Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | | | - Christian Kubisch
- Institute of Human Genetics, University of Ulm, Ulm, Germany; Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Albert C Ludolph
- Department of Neurology, University Hospital of Ulm, Ulm, Germany
| | - Alexander E Volk
- Institute of Human Genetics, University of Ulm, Ulm, Germany; Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Coady TH, Manley JL. ALS mutations in TLS/FUS disrupt target gene expression. Genes Dev 2015; 29:1696-706. [PMID: 26251528 PMCID: PMC4561479 DOI: 10.1101/gad.267286.115] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 07/22/2015] [Indexed: 12/12/2022]
Abstract
In this study, Coadey et al. investigated how mutations in the RNA/DNA-binding protein TLS/FUS (FUS), caused by ALS, affect target gene expression. They used several FUS derivatives with ALS mutations and showed that FUS-containing aggregates can alter gene expression by a toxic gain-of-function mechanism. These findings establish that ALS mutations in FUS can strongly impact target gene expression. Amyotrophic lateral sclerosis (ALS) is caused by mutations in a number of genes, including the gene encoding the RNA/DNA-binding protein translocated in liposarcoma or fused in sarcoma (TLS/FUS or FUS). Previously, we identified a number of FUS target genes, among them MECP2. To investigate how ALS mutations in FUS might impact target gene expression, we examined the effects of several FUS derivatives harboring ALS mutations, such as R521C (FUSC), on MECP2 expression in transfected human U87 cells. Strikingly, FUSC and other mutants not only altered MECP2 alternative splicing but also markedly increased mRNA abundance, which we show resulted from sharply elevated stability. Paradoxically, however, MeCP2 protein levels were significantly reduced in cells expressing ALS mutant derivatives. Providing a parsimonious explanation for these results, biochemical fractionation and in vivo localization studies revealed that MECP2 mRNA colocalized with cytoplasmic FUSC in insoluble aggregates, which are characteristic of ALS mutant proteins. Together, our results establish that ALS mutations in FUS can strongly impact target gene expression, reflecting a dominant effect of FUS-containing aggregates.
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Affiliation(s)
- Tristan H Coady
- Department of Biological Sciences, Columbia University, New York, New York 10027, USA
| | - James L Manley
- Department of Biological Sciences, Columbia University, New York, New York 10027, USA
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22
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Ferrer I, Legati A, García-Monco JC, Gomez-Beldarrain M, Carmona M, Blanco R, Seeley WW, Coppola G. Familial behavioral variant frontotemporal dementia associated with astrocyte-predominant tauopathy. J Neuropathol Exp Neurol 2015; 74:370-9. [PMID: 25756587 PMCID: PMC4366320 DOI: 10.1097/nen.0000000000000180] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A familial behavioral variant frontotemporal dementia associated with astrocyte-predominant tauopathy is described in 2 sisters born from consanguineous parents. The neuropathologic examination revealed massive accumulation of abnormally hyperphosphorylated, conformational, truncated tau at aspartic acid 421, ubiquitinated and nitrated tau at Tyr29 in cortical astrocyte (including their perivascular foot processes), and Bergmann glia. Smaller amounts of abnormal tau were observed in neurons and rarely in oligodendrocytes. There was decreased expression of glial glutamate transporter in the majority of tau-positive astrocytes. Gel electrophoresis of sarkosyl-insoluble fractions showed 2 bands of 64 and 60 kDa and a doublet of 67 to 70 kDa (which are different from those seen in Alzheimer disease and in typical 4R and 3R tauopathies) together with several bands of lower molecular weight indicative of truncated tau. Analysis of the expression of MAPT isoforms further revealed altered splicing and representation of tau isoforms involving exons 2, 3, and 10. Genetic testing revealed no known mutations in PSEN1, PSEN2, APP, MAPT, GRN, FUS, and TARDBP and no pathologic expansion in C9ORF72. However, a novel rare heterozygous sequence variant(p.Q140H) of uncertain significance was identified in FUS in both siblings.
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Affiliation(s)
- Isidre Ferrer
- Institute of Neuropathology, IDIBELL-Bellvitge University Hospital, University of Barcelona, Hospitalet de Llobregat; CIBERNED (Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas), Spain
| | - Andrea Legati
- Department of Neurology and Department of Psychiatry, Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California, Los Angeles, California
| | | | | | - Margarita Carmona
- Institute of Neuropathology, IDIBELL-Bellvitge University Hospital, University of Barcelona, Hospitalet de Llobregat; CIBERNED (Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas), Spain
| | - Rosa Blanco
- Institute of Neuropathology, IDIBELL-Bellvitge University Hospital, University of Barcelona, Hospitalet de Llobregat; CIBERNED (Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas), Spain
| | - William W. Seeley
- Department of Neurology and Pathology, Memory and Aging Center, University of California, San Francisco, California
| | - Giovanni Coppola
- Department of Neurology and Department of Psychiatry, Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, University of California, Los Angeles, California
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23
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Deng H, Gao K, Jankovic J. The role of FUS gene variants in neurodegenerative diseases. Nat Rev Neurol 2014; 10:337-48. [DOI: 10.1038/nrneurol.2014.78] [Citation(s) in RCA: 197] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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24
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Savage AL, Wilm TP, Khursheed K, Shatunov A, Morrison KE, Shaw PJ, Shaw CE, Smith B, Breen G, Al-Chalabi A, Moss D, Bubb VJ, Quinn JP. An evaluation of a SVA retrotransposon in the FUS promoter as a transcriptional regulator and its association to ALS. PLoS One 2014; 9:e90833. [PMID: 24608899 PMCID: PMC3946630 DOI: 10.1371/journal.pone.0090833] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 02/04/2014] [Indexed: 12/13/2022] Open
Abstract
Genetic mutations of FUS have been linked to many diseases including Amyotrophic Lateral Sclerosis (ALS) and Frontotemporal Lobar Degeneration. A primate specific and polymorphic retrotransposon of the SINE-VNTR-Alu (SVA) family is present upstream of the FUS gene. Here we have demonstrated that this retrotransposon can act as a classical transcriptional regulatory domain in the context of a reporter gene construct both in vitro in the human SK-N-AS neuroblastoma cell line and in vivo in a chick embryo model. We have also demonstrated that the SVA is composed of multiple distinct regulatory domains, one of which is a variable number tandem repeat (VNTR). The ability of the SVA and its component parts to direct reporter gene expression supported a hypothesis that this region could direct differential FUS expression in vivo. The SVA may therefore contribute to the modulation of FUS expression exhibited in and associated with neurological disorders including ALS where FUS regulation may be an important parameter in progression of the disease. As VNTRs are often clinical associates for disease progression we determined the extent of polymorphism within the SVA. In total 2 variants of the SVA were identified based within a central VNTR. Preliminary analysis addressed the association of these SVA variants within a small sporadic ALS cohort but did not reach statistical significance, although we did not include other parameters such as SNPs within the SVA or an environmental factor in this analysis. The latter may be particularly important as the transcriptional and epigenetic properties of the SVA are likely to be directed by the environment of the cell.
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Affiliation(s)
- Abigail L. Savage
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, The University of Liverpool, Liverpool, United Kingdom
| | - Thomas P. Wilm
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, The University of Liverpool, Liverpool, United Kingdom
| | - Kejhal Khursheed
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, The University of Liverpool, Liverpool, United Kingdom
| | - Aleksey Shatunov
- Clinical Neuroscience, Institute of Psychiatry, King's College London, London, United Kingdom
| | - Karen E. Morrison
- School of Clinical and Experimental Medicine, College of Medicine and Dentistry, University of Birmingham, Birmingham, United Kingdom; and Neurosciences Division, University Hospital Birmingham NHS Foundation Trust, Birmingham, West Midlands, United Kingdom
| | - Pamela J. Shaw
- Academic Unit of Neurology, Department of Neuroscience, Sheffield Institute for Translational Research, University of Sheffield, Sheffield, South Yorkshire, United Kingdom
| | - Christopher E. Shaw
- Clinical Neuroscience, Institute of Psychiatry, King's College London, London, United Kingdom
| | - Bradley Smith
- Clinical Neuroscience, Institute of Psychiatry, King's College London, London, United Kingdom
| | - Gerome Breen
- MRC Social Genetic and Developmental Psychiatry Research Centre, Institute of Psychiatry, King's College London, London, United Kingdom; National Institute for Health Research Biomedical Research, Centre for Mental Health, South London, United Kingdom; and Maudsley NHS Foundation Trust and Institute of Psychiatry, King's College London, London, United Kingdom
| | - Ammar Al-Chalabi
- Clinical Neuroscience, Institute of Psychiatry, King's College London, London, United Kingdom
| | - Diana Moss
- Department of Cellular and Molecular Physiology, Institute of Translational Medicine, The University of Liverpool, Liverpool, United Kingdom
| | - Vivien J. Bubb
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, The University of Liverpool, Liverpool, United Kingdom
| | - John P. Quinn
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, The University of Liverpool, Liverpool, United Kingdom
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25
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Mochizuki Y, Kawata A, Hashimoto T, Akiyama H, Kawakami H, Komori T, Oyanagi K, Mizutani T, Matsubara S. An autopsy case of familial amyotrophic lateral sclerosis with FUS R521G mutation. Amyotroph Lateral Scler Frontotemporal Degener 2014; 15:305-8. [PMID: 24575823 DOI: 10.3109/21678421.2014.881500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yoko Mochizuki
- Department of Pathology, Tokyo Metropolitan Neurological Hospital , Japan
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26
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Eisen A, Krieger C. Ethical considerations in the management of amyotrophic lateral sclerosis. Prog Neurobiol 2013; 110:45-53. [DOI: 10.1016/j.pneurobio.2013.05.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/26/2013] [Accepted: 05/17/2013] [Indexed: 12/11/2022]
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27
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Lattante S, Rouleau GA, Kabashi E. TARDBPandFUSMutations Associated with Amyotrophic Lateral Sclerosis: Summary and Update. Hum Mutat 2013; 34:812-26. [DOI: 10.1002/humu.22319] [Citation(s) in RCA: 183] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 02/28/2013] [Indexed: 12/11/2022]
Affiliation(s)
- Serena Lattante
- Institut du Cerveau et de la Moelle épinière; Centre de Recherche, CHU Pitié-Salpétrière, Inserm, UMR_S975, CRICM, F-75013; UPMC Univ Paris 06, UMR_S975, F-75013; CNRS UMR 7225; F-75013; Paris; France
| | - Guy A. Rouleau
- Montreal Neurological Institute; Department of Neurology and Neurosurgery, McGill University; Montreal; Canada
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28
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Sabatelli M, Conte A, Zollino M. Clinical and genetic heterogeneity of amyotrophic lateral sclerosis. Clin Genet 2013; 83:408-16. [DOI: 10.1111/cge.12117] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 01/30/2013] [Accepted: 01/30/2013] [Indexed: 02/01/2023]
Affiliation(s)
| | | | - M Zollino
- Istituto di Genetica Medica; Università Cattolica del Sacro Cuore; Rome; Italy
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29
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Farg MA, Soo KY, Warraich ST, Sundaramoorthy V, Blair IP, Atkin JD. Ataxin-2 interacts with FUS and intermediate-length polyglutamine expansions enhance FUS-related pathology in amyotrophic lateral sclerosis. Hum Mol Genet 2012; 22:717-28. [PMID: 23172909 DOI: 10.1093/hmg/dds479] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Fused in sarcoma (FUS) is mutated in both sporadic amyotrophic lateral sclerosis (ALS) and familial ALS patients. The mechanisms underlying neurodegeneration are not fully understood, but FUS redistributes from the nucleus to the cytoplasm in affected motor neurons, where it triggers endoplasmic reticulum (ER) stress. Ataxin-2 is a polyglutamine protein which normally contains 22 repeats, but expanded repeats (>34) are found in Spinocerebellar Ataxia type 2. Recently ataxin-2 with intermediate length repeats (27-33) was found to increase the risk of ALS. Here we show that ataxin-2 with an ALS-linked intermediate length repeat (Q31) is a potent modifier of FUS pathology in cellular disease models. Translocation of FUS to the cytoplasm and ER stress were significantly enhanced by co-expression of mutant FUS with ataxin-2 Q31. Ataxin-2 also co-localized with FUS in sporadic and FUS-linked familial ALS patient motor neurons, co-precipitated with FUS in ALS spinal cord lysates, and co-localized with FUS in the ER-Golgi compartments in neuronal cell lines. Fragmentation of the Golgi apparatus is linked to neurodegeneration in ALS and here we show that Golgi fragmentation is induced in cells expressing mutant FUS. Moreover, Golgi fragmentation was enhanced, and the early stages of apoptosis were triggered, when ataxin-2 Q31 was co-expressed with mutant FUS. These findings describe new cellular mechanisms linking ALS with ataxin-2 intermediate length polyQ expansions and provide further evidence linking disruption to ER-Golgi compartments and FUS pathology in ALS.
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Affiliation(s)
- Manal A Farg
- Department of Biochemistry, La Trobe University, Vic., Australia
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30
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Zou ZY, Cui LY, Sun Q, Li XG, Liu MS, Xu Y, Zhou Y, Yang XZ. De novo FUS gene mutations are associated with juvenile-onset sporadic amyotrophic lateral sclerosis in China. Neurobiol Aging 2012; 34:1312.e1-8. [PMID: 23046859 DOI: 10.1016/j.neurobiolaging.2012.09.005] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 08/26/2012] [Accepted: 09/07/2012] [Indexed: 12/18/2022]
Abstract
Juvenile amyotrophic lateral sclerosis (ALS) is a rare form of motor neuron disease and occurs before 25 years of age. Only very few sporadic cases of juvenile-onset ALS have been reported. Rare SOD1 mutations and several FUS mutations have been identified in juvenile-onset ALS patients. To define the genetics of juvenile-onset sporadic ALS (SALS) of Chinese origin, we sequenced all 5 exons of SOD1, exons 3-6 and 12-15 of FUS in 11 juvenile-onset SALS patients, 105 adult-onset ALS patients (including 6 familial ALS [FALS] pedigrees), and 245 healthy controls. For the 11 juvenile-onset SALS and 6 FALS cases, the other 7 exons of FUS were also screened. A heterozygous de novo missense mutation c.1574C>T (p.P525L), a heterozygous de novo 2-base pair deletion c.1509_1510delAG (p.G504Wfs*12), and a nonsense mutation c.1483C>T (p.R495X) was each identified in 1 juvenile SALS patient. A heterozygous missense mutation c.1561C>G (p.R521G) was identified in a FALS proband. In the Chinese population, the frequency of FUS mutation in FALS is 11.4% (95% confidence interval [CI], 0.9%-22.0%), higher than the Japanese (10%; 95% CI, 0.7%-19.3%), and Caucasians (4.9%; 95% CI, 3.9%-6.0%). The frequency of FUS mutation in SALS patients is 1.5% (95% CI, 0.2%-2.9%), which is similar to Koreans (1.6%; 95% CI, 0%-3.2%), but higher than in Caucasians (0.6%; 95% CI, 0.4%-0.8%). Our findings suggest that de novo FUS mutations are associated with juvenile-onset SALS of Chinese origin and that this gene should be screened in ALS patients with a young age of onset, aggressive progression, and sporadic occurrence.
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Affiliation(s)
- Zhang-Yu Zou
- Department of Neurology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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31
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Farg MA, Soo KY, Walker AK, Pham H, Orian J, Horne MK, Warraich ST, Williams KL, Blair IP, Atkin JD. Mutant FUS induces endoplasmic reticulum stress in amyotrophic lateral sclerosis and interacts with protein disulfide-isomerase. Neurobiol Aging 2012; 33:2855-68. [PMID: 22459602 DOI: 10.1016/j.neurobiolaging.2012.02.009] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 01/04/2012] [Accepted: 02/10/2012] [Indexed: 12/13/2022]
Abstract
Mutations in the gene encoding fused in sarcoma (FUS) are linked to amyotrophic lateral sclerosis (ALS), but the mechanisms by which these mutants trigger neurodegeneration remain unknown. Endoplasmic reticulum (ER) stress is increasingly recognized as an important and early pathway to motor neuron death in ALS. FUS is normally located in the nucleus but in ALS, FUS redistributes to the cytoplasm and forms inclusions. In this study, we investigated whether FUS induces ER stress in a motor neuron like cell line (NSC-34). We demonstrate that ER stress is triggered in cells expressing mutant FUS, and this is closely associated with redistribution of mutant FUS to the cytoplasm. Mutant FUS also colocalized with protein disulfide-isomerase (PDI), an important ER chaperone, in NSC-34 cells and PDI was colocalized with FUS inclusions in human ALS lumbar spinal cords, in both sporadic ALS and mutant FUS-linked familial ALS tissues. These findings implicate ER stress in the pathophysiology of FUS, and provide evidence for common pathogenic pathways in ALS linked to the ER.
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Affiliation(s)
- Manal A Farg
- Department of Biochemistry, La Trobe University, Bundoora, Victoria, Australia
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