1
|
Bjork RT, Mortimore NP, Loganathan S, Zarnescu DC. Dysregulation of Translation in TDP-43 Proteinopathies: Deficits in the RNA Supply Chain and Local Protein Production. Front Neurosci 2022; 16:840357. [PMID: 35321094 PMCID: PMC8935057 DOI: 10.3389/fnins.2022.840357] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 02/09/2022] [Indexed: 12/19/2022] Open
Abstract
Local control of gene expression provides critical mechanisms for regulating development, maintenance and plasticity in the nervous system. Among the strategies known to govern gene expression locally, mRNA transport and translation have emerged as essential for a neuron’s ability to navigate developmental cues, and to establish, strengthen and remove synaptic connections throughout lifespan. Substantiating the role of RNA processing in the nervous system, several RNA binding proteins have been implicated in both developmental and age dependent neurodegenerative disorders. Of these, TDP-43 is an RNA binding protein that has emerged as a common denominator in amyotrophic lateral sclerosis (ALS), frontotemporal dementia (FTD) and related disorders due to the identification of causative mutations altering its function and its accumulation in cytoplasmic aggregates observed in a significant fraction of ALS/FTD cases, regardless of etiology. TDP-43 is involved in multiple aspects of RNA processing including splicing, transport and translation. Given that one of the early events in disease pathogenesis is mislocalization from the nucleus to the cytoplasm, several studies have focused on elucidating the pathogenic role of TDP-43 in cytoplasmic translation. Here we review recent findings describing TDP-43 translational targets and potential mechanisms of translation dysregulation in TDP-43 proteinopathies across multiple experimental models including cultured cells, flies, mice and patient derived neurons.
Collapse
Affiliation(s)
- Reed T. Bjork
- Department of Molecular and Cellular Biology, University of Arizona, Tucson, AZ, United States
- Neuroscience Graduate Interdisciplinary Program, University of Arizona, Tucson, AZ, United States
| | - Nicholas P. Mortimore
- Department of Molecular and Cellular Biology, University of Arizona, Tucson, AZ, United States
| | | | - Daniela C. Zarnescu
- Department of Molecular and Cellular Biology, University of Arizona, Tucson, AZ, United States
- *Correspondence: Daniela C. Zarnescu,
| |
Collapse
|
3
|
Markert SM, Skoruppa M, Yu B, Mulcahy B, Zhen M, Gao S, Sendtner M, Stigloher C. Overexpression of an ALS-associated FUS mutation in C. elegans disrupts NMJ morphology and leads to defective neuromuscular transmission. Biol Open 2020; 9:bio055129. [PMID: 33148607 PMCID: PMC7746668 DOI: 10.1242/bio.055129] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 10/27/2020] [Indexed: 12/26/2022] Open
Abstract
The amyotrophic lateral sclerosis (ALS) neurodegenerative disorder has been associated with multiple genetic lesions, including mutations in the gene for fused in sarcoma (FUS), a nuclear-localized RNA/DNA-binding protein. Neuronal expression of the pathological form of FUS proteins in Caenorhabditis elegans results in mislocalization and aggregation of FUS in the cytoplasm, and leads to impairment of motility. However, the mechanisms by which the mutant FUS disrupts neuronal health and function remain unclear. Here we investigated the impact of ALS-associated FUS on motor neuron health using correlative light and electron microscopy, electron tomography, and electrophysiology. We show that ectopic expression of wild-type or ALS-associated human FUS impairs synaptic vesicle docking at neuromuscular junctions. ALS-associated FUS led to the emergence of a population of large, electron-dense, and filament-filled endosomes. Electrophysiological recording revealed reduced transmission from motor neurons to muscles. Together, these results suggest a pathological effect of ALS-causing FUS at synaptic structure and function organization.This article has an associated First Person interview with the first author of the paper.
Collapse
Affiliation(s)
- Sebastian M Markert
- University of Würzburg, Biocenter, Imaging Core Facility, Am Hubland, Würzburg 97074, Germany
| | - Michael Skoruppa
- University Hospital Würzburg, Institute of Clinical Neurobiology, Versbacherstraße 5, 97080 Würzburg, Germany
| | - Bin Yu
- Huazhong University of Science and Technology, Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Wuhan 430074, China
| | - Ben Mulcahy
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, Ontario M5G 1X5, Canada
| | - Mei Zhen
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, Ontario M5G 1X5, Canada
- University of Toronto, Department of Molecular Genetics, Physiology and Institute of Medical Science, 1 King's College Circle, Toronto, Ontario M5S 1A8, Canada
| | - Shangbang Gao
- Huazhong University of Science and Technology, Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Wuhan 430074, China
| | - Michael Sendtner
- University Hospital Würzburg, Institute of Clinical Neurobiology, Versbacherstraße 5, 97080 Würzburg, Germany
| | - Christian Stigloher
- University of Würzburg, Biocenter, Imaging Core Facility, Am Hubland, Würzburg 97074, Germany
| |
Collapse
|
4
|
Chu JF, Majumder P, Chatterjee B, Huang SL, Shen CKJ. TDP-43 Regulates Coupled Dendritic mRNA Transport-Translation Processes in Co-operation with FMRP and Staufen1. Cell Rep 2020; 29:3118-3133.e6. [PMID: 31801077 DOI: 10.1016/j.celrep.2019.10.061] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 07/12/2019] [Accepted: 10/14/2019] [Indexed: 01/24/2023] Open
Abstract
Tightly regulated transport of messenger ribonucleoprotein (mRNP) granules to diverse locations of dendrites and axons is essential for appropriately timed protein synthesis within distinct sub-neuronal compartments. Perturbations of this regulation lead to various neurological disorders. Using imaging and molecular approaches, we demonstrate how TDP-43 co-operates with two other RNA-binding proteins, FMRP and Staufen1, to regulate the anterograde and retrograde transport, respectively, of Rac1 mRNPs in mouse neuronal dendrites. We also analyze the mechanisms by which TDP-43 mediates coupled mRNA transport-translation processes in dendritic sub-compartments by following in real-time the co-movement of RNA and endogenous fluorescence-tagged protein in neurons and by simultaneous examination of transport/translation dynamics by using an RNA biosensor. This study establishes the pivotal roles of TDP-43 in transporting mRNP granules in dendrites, inhibiting translation inside those granules, and reactivating it once the granules reach the dendritic spines.
Collapse
Affiliation(s)
- Jen-Fei Chu
- Institute of Molecular Biology, Academia Sinica, Taipei 115, Taiwan
| | - Pritha Majumder
- Institute of Molecular Biology, Academia Sinica, Taipei 115, Taiwan.
| | | | - Shih-Ling Huang
- Institute of Molecular Biology, Academia Sinica, Taipei 115, Taiwan
| | | |
Collapse
|
5
|
Kocks C, Boltengagen A, Piwecka M, Rybak-Wolf A, Rajewsky N. Single-Molecule Fluorescence In Situ Hybridization (FISH) of Circular RNA CDR1as. Methods Mol Biol 2018; 1724:77-96. [PMID: 29322442 DOI: 10.1007/978-1-4939-7562-4_7] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Individual mRNA molecules can be imaged in fixed cells by hybridization with multiple, singly labeled oligonucleotide probes, followed by computational identification of fluorescent signals. This approach, called single-molecule RNA fluorescence in situ hybridization (smRNA FISH), allows subcellular localization and absolute quantification of RNA molecules in individual cells. Here, we describe a simple smRNA FISH protocol for two-color imaging of a circular RNA, CDR1as, simultaneously with an unrelated messenger RNA. The protocol can be adapted to circRNAs that coexist with overlapping, noncircular mRNA isoforms produced from the same genetic locus.
Collapse
Affiliation(s)
- Christine Kocks
- Systems Biology of Gene-Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center (MDC) for Molecular Medicine in the Helmholtz Association, Berlin, Germany.
| | - Anastasiya Boltengagen
- Systems Biology of Gene-Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center (MDC) for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Monika Piwecka
- Systems Biology of Gene-Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center (MDC) for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Agnieszka Rybak-Wolf
- Systems Biology of Gene-Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center (MDC) for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Nikolaus Rajewsky
- Systems Biology of Gene-Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max Delbrück Center (MDC) for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| |
Collapse
|
6
|
Murakami T, Qamar S, Lin JQ, Schierle GSK, Rees E, Miyashita A, Costa AR, Dodd RB, Chan FTS, Michel CH, Kronenberg-Versteeg D, Li Y, Yang SP, Wakutani Y, Meadows W, Ferry RR, Dong L, Tartaglia GG, Favrin G, Lin WL, Dickson DW, Zhen M, Ron D, Schmitt-Ulms G, Fraser PE, Shneider NA, Holt C, Vendruscolo M, Kaminski CF, St George-Hyslop P. ALS/FTD Mutation-Induced Phase Transition of FUS Liquid Droplets and Reversible Hydrogels into Irreversible Hydrogels Impairs RNP Granule Function. Neuron 2015; 88:678-90. [PMID: 26526393 PMCID: PMC4660210 DOI: 10.1016/j.neuron.2015.10.030] [Citation(s) in RCA: 609] [Impact Index Per Article: 67.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 06/18/2015] [Accepted: 10/15/2015] [Indexed: 12/14/2022]
Abstract
The mechanisms by which mutations in FUS and other RNA binding proteins cause ALS and FTD remain controversial. We propose a model in which low-complexity (LC) domains of FUS drive its physiologically reversible assembly into membrane-free, liquid droplet and hydrogel-like structures. ALS/FTD mutations in LC or non-LC domains induce further phase transition into poorly soluble fibrillar hydrogels distinct from conventional amyloids. These assemblies are necessary and sufficient for neurotoxicity in a C. elegans model of FUS-dependent neurodegeneration. They trap other ribonucleoprotein (RNP) granule components and disrupt RNP granule function. One consequence is impairment of new protein synthesis by cytoplasmic RNP granules in axon terminals, where RNP granules regulate local RNA metabolism and translation. Nuclear FUS granules may be similarly affected. Inhibiting formation of these fibrillar hydrogel assemblies mitigates neurotoxicity and suggests a potential therapeutic strategy that may also be applicable to ALS/FTD associated with mutations in other RNA binding proteins. FUS phase transitions between monomer, liquid droplet, and hydrogel states FUS mutants induce further phase transition into irreversible fibrillar hydrogels Irreversible hydrogels sequester RNP cargo and impair RNP granule function Formation of non-amyloid fibrillar hydrogels provides a compelling causative mechanism for neurodegeneration
Collapse
Affiliation(s)
- Tetsuro Murakami
- Tanz Centre for Research in Neurodegenerative Diseases, and Departments of Medicine, Medical Biophysics and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 3H2, Canada
| | - Seema Qamar
- Cambridge Institute for Medical Research, Cambridge National Institute for Health Research - Biomedical Research Unit in Dementia, University of Cambridge, Cambridge CB2 0XY, UK
| | - Julie Qiaojin Lin
- Department of Physiology, Development, and Neuroscience, University of Cambridge, Cambridge CB2 3DY, UK
| | | | - Eric Rees
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 3RA, UK
| | - Akinori Miyashita
- Tanz Centre for Research in Neurodegenerative Diseases, and Departments of Medicine, Medical Biophysics and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 3H2, Canada
| | - Ana R Costa
- Cambridge Institute for Medical Research, Cambridge National Institute for Health Research - Biomedical Research Unit in Dementia, University of Cambridge, Cambridge CB2 0XY, UK
| | - Roger B Dodd
- Cambridge Institute for Medical Research, Cambridge National Institute for Health Research - Biomedical Research Unit in Dementia, University of Cambridge, Cambridge CB2 0XY, UK
| | - Fiona T S Chan
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 3RA, UK
| | - Claire H Michel
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 3RA, UK
| | - Deborah Kronenberg-Versteeg
- Cambridge Institute for Medical Research, Cambridge National Institute for Health Research - Biomedical Research Unit in Dementia, University of Cambridge, Cambridge CB2 0XY, UK
| | - Yi Li
- Cambridge Institute for Medical Research, Cambridge National Institute for Health Research - Biomedical Research Unit in Dementia, University of Cambridge, Cambridge CB2 0XY, UK
| | - Seung-Pil Yang
- Tanz Centre for Research in Neurodegenerative Diseases, and Departments of Medicine, Medical Biophysics and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 3H2, Canada
| | - Yosuke Wakutani
- Tanz Centre for Research in Neurodegenerative Diseases, and Departments of Medicine, Medical Biophysics and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 3H2, Canada
| | - William Meadows
- Cambridge Institute for Medical Research, Cambridge National Institute for Health Research - Biomedical Research Unit in Dementia, University of Cambridge, Cambridge CB2 0XY, UK
| | - Rodylyn Rose Ferry
- Tanz Centre for Research in Neurodegenerative Diseases, and Departments of Medicine, Medical Biophysics and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 3H2, Canada
| | - Liang Dong
- Cambridge Institute for Medical Research, Cambridge National Institute for Health Research - Biomedical Research Unit in Dementia, University of Cambridge, Cambridge CB2 0XY, UK
| | - Gian Gaetano Tartaglia
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK; Centre for Genomic Regulation and University Pompeu Fabra, Dr. Aiguader St. 88, and Universitat Pompeu Fabra, 08003, Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), 23 Passeig Lluís Companys, 08010 Barcelona, Spain
| | - Giorgio Favrin
- Cambridge Systems Biology Center & Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, UK
| | - Wen-Lang Lin
- Department of Research, Neuroscience, Mayo Clinic College of Medicine, 4500 San Pablo Road, Jacksonville, FL 32224, USA
| | - Dennis W Dickson
- Department of Research, Neuroscience, Mayo Clinic College of Medicine, 4500 San Pablo Road, Jacksonville, FL 32224, USA
| | - Mei Zhen
- Samuel Lunenfeld Research Institute, Mount Sinai Hospital, and Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5G 1X5, Canada
| | - David Ron
- Department of Clinical Biochemistry, Cambridge Institute for Medical Research, University of Cambridge, Cambridge CB2 0XY, UK
| | - Gerold Schmitt-Ulms
- Tanz Centre for Research in Neurodegenerative Diseases, and Departments of Medicine, Medical Biophysics and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 3H2, Canada
| | - Paul E Fraser
- Tanz Centre for Research in Neurodegenerative Diseases, and Departments of Medicine, Medical Biophysics and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 3H2, Canada
| | - Neil A Shneider
- Department of Neurology, Center for Motor Neuron Biology and Disease, Columbia University Medical Center, New York, NY 10032, USA
| | - Christine Holt
- Department of Physiology, Development, and Neuroscience, University of Cambridge, Cambridge CB2 3DY, UK
| | | | - Clemens F Kaminski
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 3RA, UK
| | - Peter St George-Hyslop
- Tanz Centre for Research in Neurodegenerative Diseases, and Departments of Medicine, Medical Biophysics and Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 3H2, Canada; Cambridge Institute for Medical Research, Cambridge National Institute for Health Research - Biomedical Research Unit in Dementia, University of Cambridge, Cambridge CB2 0XY, UK.
| |
Collapse
|