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Jadavi S, Dante S, Civiero L, Sandre M, Bubacco L, Tosatto L, Bianchini P, Canale C, Diaspro A. Fluorescence labeling methods influence the aggregation process of α-syn in vitro differently. Nanoscale 2023; 15:8270-8277. [PMID: 37073868 DOI: 10.1039/d2nr05487f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In a previous study, the coexistence of different aggregation pathways of insulin and β-amyloid (Aβ) peptides was demonstrated by correlative stimulated emission depletion (STED) microscopy and atomic force microscopy (AFM). This had been explained by suboptimal proteins labeling strategies that generate heterogeneous populations of aggregating species. However, because of the limited number of proteins considered, the failure of the fluorescent labeling that occurs in a large portion of the aggregating fibrils observed for insulin and Aβ peptides, could not be considered a general phenomenon valid for all molecular systems. Here, we investigated the aggregation process of α-synuclein (α-syn), an amyloidogenic peptide involved in Parkinson's disease, which is significantly larger (MW ∼14 kDa) than insulin and Aβ, previously investigated. The results showed that an unspecific labeling procedure, such as that previously adopted for shorter proteins, reproduced the coexistence of labeled/unlabeled fibers. Therefore, a site-specific labeling method was developed to target a domain of the peptide scarcely involved in the aggregation process. Correlative STED-AFM illustrated that all fibrillar aggregates derived from the aggregation of α-syn at the dye-to-protein ratio of 1 : 22 were fluorescent. These results, demonstrated here for the specific case of α-syn, highlight that the labeling artifacts can be avoided by careful designing the labeling strategy for the molecular system under investigation. The use of a label-free correlative microscopy technique would play a crucial role in the control of the setting of these conditions.
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Affiliation(s)
- S Jadavi
- Nanoscopy, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, Building B, 16152 Genova, Italy
- Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy.
| | - S Dante
- Materials Characterization Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - L Civiero
- Department of Biology, University of Padova, Via U. Bassi 58/b, 35131 Padova, Italy
- IRCCS San Camillo Hospital, Via Alberoni 70, 30126 Venice, Italy
- Centro Studi per la Neurodegenerazione (CESNE), University of Padova, 35131 Padova, Italy
| | - M Sandre
- Centro Studi per la Neurodegenerazione (CESNE), University of Padova, 35131 Padova, Italy
- Parkinson and Movement Disorders Unit, Department of Neuroscience, University of Padova, Via Nicolò Giustiniani, 5, 35128 Padova, Italy
| | - L Bubacco
- Department of Biology, University of Padova, Via U. Bassi 58/b, 35131 Padova, Italy
- IRCCS San Camillo Hospital, Via Alberoni 70, 30126 Venice, Italy
- Centro Studi per la Neurodegenerazione (CESNE), University of Padova, 35131 Padova, Italy
| | - L Tosatto
- Istituti di Biofisica, CNR, Trento, Italy
| | - P Bianchini
- Nanoscopy, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, Building B, 16152 Genova, Italy
| | - C Canale
- Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy.
| | - A Diaspro
- Nanoscopy, CHT Erzelli, Istituto Italiano di Tecnologia, Via Enrico Melen 83, Building B, 16152 Genova, Italy
- Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy.
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2
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Prakasam R, Bonadiman A, Andreotti R, Zuccaro E, Dalfovo D, Marchioretti C, Tripathy D, Petris G, Anderson EN, Migazzi A, Tosatto L, Cereseto A, Battaglioli E, Sorarù G, Lim WF, Rinaldi C, Sambataro F, Pourshafie N, Grunseich C, Romanel A, Pandey UB, Contestabile A, Ronzitti G, Basso M, Pennuto M. LSD1/PRMT6-targeting gene therapy to attenuate androgen receptor toxic gain-of-function ameliorates spinobulbar muscular atrophy phenotypes in flies and mice. Nat Commun 2023; 14:603. [PMID: 36746939 PMCID: PMC9902531 DOI: 10.1038/s41467-023-36186-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 01/19/2023] [Indexed: 02/08/2023] Open
Abstract
Spinobulbar muscular atrophy (SBMA) is caused by CAG expansions in the androgen receptor gene. Androgen binding to polyQ-expanded androgen receptor triggers SBMA through a combination of toxic gain-of-function and loss-of-function mechanisms. Leveraging cell lines, mice, and patient-derived specimens, we show that androgen receptor co-regulators lysine-specific demethylase 1 (LSD1) and protein arginine methyltransferase 6 (PRMT6) are overexpressed in an androgen-dependent manner specifically in the skeletal muscle of SBMA patients and mice. LSD1 and PRMT6 cooperatively and synergistically transactivate androgen receptor, and their effect is enhanced by expanded polyQ. Pharmacological and genetic silencing of LSD1 and PRMT6 attenuates polyQ-expanded androgen receptor transactivation in SBMA cells and suppresses toxicity in SBMA flies, and a preclinical approach based on miRNA-mediated silencing of LSD1 and PRMT6 attenuates disease manifestations in SBMA mice. These observations suggest that targeting overexpressed co-regulators can attenuate androgen receptor toxic gain-of-function without exacerbating loss-of-function, highlighting a potential therapeutic strategy for patients with SBMA.
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Affiliation(s)
- Ramachandran Prakasam
- Dulbecco Telethon Institute at the Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Angela Bonadiman
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Roberta Andreotti
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine, Padova, Italy
- Padova Neuroscience Center, Padova, Italy
| | - Emanuela Zuccaro
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine, Padova, Italy
- Padova Neuroscience Center, Padova, Italy
| | - Davide Dalfovo
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Caterina Marchioretti
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine, Padova, Italy
- Padova Neuroscience Center, Padova, Italy
| | - Debasmita Tripathy
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Gianluca Petris
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
- Wellcome Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Saffron Walden, UK
| | - Eric N Anderson
- Department of Pediatrics, Children's Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Alice Migazzi
- Dulbecco Telethon Institute at the Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Laura Tosatto
- Dulbecco Telethon Institute at the Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Anna Cereseto
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Elena Battaglioli
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Gianni Sorarù
- Padova Neuroscience Center, Padova, Italy
- Department of Neuroscience, University of Padova, Padova, Italy
| | - Wooi Fang Lim
- MDUK Oxford Neuromuscular Centre, University of Oxford, Oxford, UK
- Institute of Developmental and Regenerative Medicine, Department of Paediatrics, University of Oxford, Oxford, UK
| | - Carlo Rinaldi
- MDUK Oxford Neuromuscular Centre, University of Oxford, Oxford, UK
- Institute of Developmental and Regenerative Medicine, Department of Paediatrics, University of Oxford, Oxford, UK
| | - Fabio Sambataro
- Padova Neuroscience Center, Padova, Italy
- Department of Neuroscience, University of Padova, Padova, Italy
| | - Naemeh Pourshafie
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Christopher Grunseich
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Alessandro Romanel
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Udai Bhan Pandey
- Department of Pediatrics, Children's Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | | | - Giuseppe Ronzitti
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Evry, France
- Genethon, 91000, Evry, France
| | - Manuela Basso
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy.
| | - Maria Pennuto
- Dulbecco Telethon Institute at the Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy.
- Department of Biomedical Sciences, University of Padova, Padova, Italy.
- Veneto Institute of Molecular Medicine, Padova, Italy.
- Padova Neuroscience Center, Padova, Italy.
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3
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Piol D, Tosatto L, Zuccaro E, Anderson EN, Falconieri A, Polanco MJ, Marchioretti C, Lia F, White J, Bregolin E, Minervini G, Parodi S, Salvatella X, Arrigoni G, Ballabio A, La Spada AR, Tosatto SC, Sambataro F, Medina DL, Pandey UB, Basso M, Pennuto M. Antagonistic effect of cyclin-dependent kinases and a calcium-dependent phosphatase on polyglutamine-expanded androgen receptor toxic gain of function. Sci Adv 2023; 9:eade1694. [PMID: 36608116 PMCID: PMC9821870 DOI: 10.1126/sciadv.ade1694] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Spinal and bulbar muscular atrophy is caused by polyglutamine (polyQ) expansions in androgen receptor (AR), generating gain-of-function toxicity that may involve phosphorylation. Using cellular and animal models, we investigated what kinases and phosphatases target polyQ-expanded AR, whether polyQ expansions modify AR phosphorylation, and how this contributes to neurodegeneration. Mass spectrometry showed that polyQ expansions preserve native phosphorylation and increase phosphorylation at conserved sites controlling AR stability and transactivation. In small-molecule screening, we identified that CDC25/CDK2 signaling could enhance AR phosphorylation, and the calcium-sensitive phosphatase calcineurin had opposite effects. Pharmacologic and genetic manipulation of these kinases and phosphatases modified polyQ-expanded AR function and toxicity in cells, flies, and mice. Ablation of CDK2 reduced AR phosphorylation in the brainstem and restored expression of Myc and other genes involved in DNA damage, senescence, and apoptosis, indicating that the cell cycle-regulated kinase plays more than a bystander role in SBMA-vulnerable postmitotic cells.
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Affiliation(s)
- Diana Piol
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy
- Padova Neuroscience Center, Padova, Italy
- Dulbecco Telethon Institute (DTI), Department of Cellular, Computational, and Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | - Laura Tosatto
- Dulbecco Telethon Institute (DTI), Department of Cellular, Computational, and Integrative Biology (CIBIO), University of Trento, Trento, Italy
- Institute of Biophysics, Consiglio Nazionale delle Ricerche (CNR), Trento, Italy
| | - Emanuela Zuccaro
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy
- Padova Neuroscience Center, Padova, Italy
| | - Eric N. Anderson
- Division of Child Neurology, Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA 15224, USA
| | | | - Maria J. Polanco
- Dulbecco Telethon Institute (DTI), Department of Cellular, Computational, and Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | - Caterina Marchioretti
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy
- Padova Neuroscience Center, Padova, Italy
| | - Federica Lia
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy
- Padova Neuroscience Center, Padova, Italy
| | - Joseph White
- Department of Pathology and Laboratory Medicine, Department of Neurology, Department of Biological Chemistry, and the UCI Institute for Neurotherapeutics, University of California, Irvine, CA 92697, USA
| | - Elisa Bregolin
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy
- Padova Neuroscience Center, Padova, Italy
| | | | - Sara Parodi
- Istituto Italiano di Tecnologia, Genova, Italy
| | - Xavier Salvatella
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Barcelona, Spain
- ICREA, Passeig Lluís Companys 23, Barcelona, Spain
| | - Giorgio Arrigoni
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Andrea Ballabio
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Naples, Italy
- Department of Medical and Translational Science, Federico II University, Naples, Italy
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, TX 77030, USA
| | - Albert R. La Spada
- Department of Pathology and Laboratory Medicine, Department of Neurology, Department of Biological Chemistry, and the UCI Institute for Neurotherapeutics, University of California, Irvine, CA 92697, USA
| | - Silvio C. E. Tosatto
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Institute of Neuroscience, Consiglio Nazionale delle Ricerche (CNR), Padova, Italy
| | - Fabio Sambataro
- Padova Neuroscience Center, Padova, Italy
- Department of Neuroscience, University of Padova, Padova, Italy
| | - Diego L. Medina
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Department of Medical and Translational Science, Federico II University, Naples, Italy
| | - Udai B. Pandey
- Division of Child Neurology, Department of Pediatrics, Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA 15224, USA
| | - Manuela Basso
- Department of Cellular, Computational, and Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | - Maria Pennuto
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Veneto Institute of Molecular Medicine (VIMM), Padova, Italy
- Padova Neuroscience Center, Padova, Italy
- Dulbecco Telethon Institute (DTI), Department of Cellular, Computational, and Integrative Biology (CIBIO), University of Trento, Trento, Italy
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4
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Ridolfi L, Gurrieri L, Riva M, Bulgarelli J, Fausti V, F. de Rosa, Guidoboni M, Foca F, Tazzari M, Petrini M, Granato A, Pancisi E, Dall'Agata M, Amadori E, Gamboni A, Pasini G, Cortesi P, Mercatali L, Bongiovanni A, Tosatto L. 48P Phase II trial on vaccination with autologous dendritic cells loaded with autologous tumour homogenate in resected glioblastoma (COMBI-GVAX): Clinical results of the first step. Immuno-Oncology and Technology 2022. [DOI: 10.1016/j.iotech.2022.100153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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5
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Choi ML, Chappard A, Singh BP, Maclachlan C, Rodrigues M, Fedotova EI, Berezhnov AV, De S, Peddie CJ, Athauda D, Virdi GS, Zhang W, Evans JR, Wernick AI, Zanjani ZS, Angelova PR, Esteras N, Vinokurov AY, Morris K, Jeacock K, Tosatto L, Little D, Gissen P, Clarke DJ, Kunath T, Collinson L, Klenerman D, Abramov AY, Horrocks MH, Gandhi S. Author Correction: Pathological structural conversion of α-synuclein at the mitochondria induces neuronal toxicity. Nat Neurosci 2022; 25:1582. [PMID: 36261654 PMCID: PMC9630127 DOI: 10.1038/s41593-022-01206-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Affiliation(s)
- Minee L Choi
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.,The Francis Crick Institute, London, UK.,Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | | | - Bhanu P Singh
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK.,School of Physics, University of Edinburgh, Edinburgh, UK
| | | | - Margarida Rodrigues
- Department of Chemistry, University of Cambridge, Cambridge, UK.,Dementia Research institute at University of Cambridge, Cambridge, UK
| | - Evgeniya I Fedotova
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Russia.,Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
| | - Alexey V Berezhnov
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Russia.,Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
| | - Suman De
- Department of Chemistry, University of Cambridge, Cambridge, UK.,Dementia Research institute at University of Cambridge, Cambridge, UK
| | | | - Dilan Athauda
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.,The Francis Crick Institute, London, UK
| | - Gurvir S Virdi
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.,The Francis Crick Institute, London, UK.,Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | - Weijia Zhang
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.,The Francis Crick Institute, London, UK
| | - James R Evans
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.,The Francis Crick Institute, London, UK.,Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | - Anna I Wernick
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.,The Francis Crick Institute, London, UK.,Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | - Zeinab Shadman Zanjani
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.,The Francis Crick Institute, London, UK.,Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | - Plamena R Angelova
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - Noemi Esteras
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - Andrey Y Vinokurov
- Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
| | - Katie Morris
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Kiani Jeacock
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Laura Tosatto
- Department of Chemistry, University of Cambridge, Cambridge, UK.,Istituto di Biofisica, National Council of Research, Trento, Italy
| | - Daniel Little
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK.,NIHR Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - Paul Gissen
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK.,NIHR Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - David J Clarke
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Tilo Kunath
- Centre for Regenerative Medicine, Institute for Stem Cell Research, School of Biological Sciences, University of Edinburgh, Edinburgh, UK
| | | | - David Klenerman
- Department of Chemistry, University of Cambridge, Cambridge, UK.,Dementia Research institute at University of Cambridge, Cambridge, UK
| | - Andrey Y Abramov
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK. .,Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia.
| | - Mathew H Horrocks
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK.
| | - Sonia Gandhi
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK. .,The Francis Crick Institute, London, UK. .,Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA.
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6
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Choi ML, Chappard A, Singh BP, Maclachlan C, Rodrigues M, Fedotova EI, Berezhnov AV, De S, Peddie CJ, Athauda D, Virdi GS, Zhang W, Evans JR, Wernick AI, Zanjani ZS, Angelova PR, Esteras N, Vinokurov AY, Morris K, Jeacock K, Tosatto L, Little D, Gissen P, Clarke DJ, Kunath T, Collinson L, Klenerman D, Abramov AY, Horrocks MH, Gandhi S. Pathological structural conversion of α-synuclein at the mitochondria induces neuronal toxicity. Nat Neurosci 2022; 25:1134-1148. [PMID: 36042314 PMCID: PMC9448679 DOI: 10.1038/s41593-022-01140-3] [Citation(s) in RCA: 62] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 07/12/2022] [Indexed: 11/08/2022]
Abstract
Aggregation of alpha-synuclein (α-Syn) drives Parkinson's disease (PD), although the initial stages of self-assembly and structural conversion have not been directly observed inside neurons. In this study, we tracked the intracellular conformational states of α-Syn using a single-molecule Förster resonance energy transfer (smFRET) biosensor, and we show here that α-Syn converts from a monomeric state into two distinct oligomeric states in neurons in a concentration-dependent and sequence-specific manner. Three-dimensional FRET-correlative light and electron microscopy (FRET-CLEM) revealed that intracellular seeding events occur preferentially on membrane surfaces, especially at mitochondrial membranes. The mitochondrial lipid cardiolipin triggers rapid oligomerization of A53T α-Syn, and cardiolipin is sequestered within aggregating lipid-protein complexes. Mitochondrial aggregates impair complex I activity and increase mitochondrial reactive oxygen species (ROS) generation, which accelerates the oligomerization of A53T α-Syn and causes permeabilization of mitochondrial membranes and cell death. These processes were also observed in induced pluripotent stem cell (iPSC)-derived neurons harboring A53T mutations from patients with PD. Our study highlights a mechanism of de novo α-Syn oligomerization at mitochondrial membranes and subsequent neuronal toxicity.
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Affiliation(s)
- Minee L Choi
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
- The Francis Crick Institute, London, UK
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | | | - Bhanu P Singh
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
- School of Physics, University of Edinburgh, Edinburgh, UK
| | | | - Margarida Rodrigues
- Department of Chemistry, University of Cambridge, Cambridge, UK
- Dementia Research institute at University of Cambridge, Cambridge, UK
| | - Evgeniya I Fedotova
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Russia
- Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
| | - Alexey V Berezhnov
- Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Russia
- Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
| | - Suman De
- Department of Chemistry, University of Cambridge, Cambridge, UK
- Dementia Research institute at University of Cambridge, Cambridge, UK
| | | | - Dilan Athauda
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
- The Francis Crick Institute, London, UK
| | - Gurvir S Virdi
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
- The Francis Crick Institute, London, UK
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | - Weijia Zhang
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
- The Francis Crick Institute, London, UK
| | - James R Evans
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
- The Francis Crick Institute, London, UK
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | - Anna I Wernick
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
- The Francis Crick Institute, London, UK
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | - Zeinab Shadman Zanjani
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
- The Francis Crick Institute, London, UK
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| | - Plamena R Angelova
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - Noemi Esteras
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - Andrey Y Vinokurov
- Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia
| | - Katie Morris
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Kiani Jeacock
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Laura Tosatto
- Department of Chemistry, University of Cambridge, Cambridge, UK
- Istituto di Biofisica, National Council of Research, Trento, Italy
| | - Daniel Little
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - Paul Gissen
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - David J Clarke
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK
| | - Tilo Kunath
- Centre for Regenerative Medicine, Institute for Stem Cell Research, School of Biological Sciences, University of Edinburgh, Edinburgh, UK
| | | | - David Klenerman
- Department of Chemistry, University of Cambridge, Cambridge, UK
- Dementia Research institute at University of Cambridge, Cambridge, UK
| | - Andrey Y Abramov
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.
- Cell Physiology and Pathology Laboratory, Orel State University, Orel, Russia.
| | - Mathew H Horrocks
- EaStCHEM School of Chemistry, University of Edinburgh, Edinburgh, UK.
| | - Sonia Gandhi
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.
- The Francis Crick Institute, London, UK.
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA.
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7
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Tosatto L, Coscia F. A glance at post-translational modifications of human thyroglobulin: potential impact on function and pathogenesis. Eur Thyroid J 2022; 11:e220046. [PMID: 35544053 PMCID: PMC9254275 DOI: 10.1530/etj-22-0046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 05/09/2022] [Indexed: 11/08/2022] Open
Abstract
Thyroid hormones are essential for the metabolism of vertebrates and their synthesis, storage and release in the thyroid gland are orchestrated by their large protein precursor thyroglobulin (Tg). Alterations of Tg structure and localisation often correlate with major thyroid disorders. Namely, Tg is the main antigen in autoimmune thyroid diseases, and mutations in its gene are one of the causes of congenital hypothyroidism. Post-translational modifications (PTMs) are crucial for Tg surface properties and may be affected by the disease microenvironment; yet, their role in thyroid homeostasis and pathogenesis remains elusive. The advance of electron cryo-microscopy (cryo-EM) has recently enabled the structure of Tg to be revealed in the un-iodinated and iodinated states. Moreover, ad hoc proteomic analyses have lately identified new PTMs in Tg. Here, we provide an overview of the Tg cryo-EM models obtained so far, and we build a three-dimensional map of known PTMs in Tg. Based on their location, we suggest the potential implication of each PTM in hormonogenesis, interactions with cellular partners, colloid cross-linking and hormone release. In addition, several PTMs overlap with immunogenic regions and pathogenic gene mutations. Hence, our analysis reveals a possible cross-talk between PTMs and alteration of Tg function in these disorders. In perspective, multi-omics analyses from patients, interpreted with structural and functional data, may generate more robust models to correlate phenotypes with classes of Tg functional alterations. This integrative approach will likely provide more targeted strategies to restore specific Tg functions in different thyroid pathologies.
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8
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Mongardi L, D'Andrea M, Tosatto L, Volpin M, Cultrera F. Endoscopic third ventriculostomy for the treatment of Blake's pouch cyst in adulthood. Acta Neurol Belg 2022; 122:537-539. [PMID: 33420942 DOI: 10.1007/s13760-020-01591-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 12/28/2020] [Indexed: 11/25/2022]
Affiliation(s)
- L Mongardi
- Neurosurgery, M. Bufalini Hospital, Viale Ghirotti 286, 47521, Cesena, Italy
- Neurosurgery, Sant'Anna University Hospital Ferrara, Via Aldo Moro 8, Cona, 44124, Ferrara, Italy
| | - M D'Andrea
- Neurosurgery, M. Bufalini Hospital, Viale Ghirotti 286, 47521, Cesena, Italy.
| | - L Tosatto
- Neurosurgery, M. Bufalini Hospital, Viale Ghirotti 286, 47521, Cesena, Italy
| | - M Volpin
- San Marino Neurological Unit, San Marino Hospital, San Marino, Republic of San Marino
| | - F Cultrera
- Neurosurgery, M. Bufalini Hospital, Viale Ghirotti 286, 47521, Cesena, Italy
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9
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D'Andrea M, Mongardi L, Fuschillo D, Musio A, Commodaro C, Quilis-Quesada V, Tosatto L. Vermian subtentorial arteriovenous malformation supplied by the artery of Wollschlaeger and Wollschlaeger. Clin Neurol Neurosurg 2021; 206:106670. [PMID: 34015698 DOI: 10.1016/j.clineuro.2021.106670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 10/21/2022]
Abstract
BACKGROUND The artery of Wollschlaeger and Wollschlaeger is a tentorial branch of the superior cerebellar artery: due to its small diameter, it is not usually seen in normal angiograms except when enlarged in the setting of a dural AVF or tentorial meningioma. Its presence has been rarely described in the Literature. CASE REPORT herein we describe the first ever reported case of a vermian subtentorial arteriovenous malformation supplied by the artery of Wollschlaeger and Wollschlaeger in 70 year old female patient. CONCLUSION vermian subtentorial AVMs supplied by the artery of Wollschlaeger and Wollschlaeger are extremely rare vascular malformations. The presence of the artery of Wollschlaeger and Wollschlaeger must be carefully evaluated during preoperative surgical planning due to its key role in the supply of vascular malformation and to decrease the risk of intra operative bleeding during surgery.
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Affiliation(s)
- M D'Andrea
- Neurosurgery Division, M. Bufalini Hospital, Viale Ghirotti 286, 47521 Cesena, Italy
| | - L Mongardi
- Neurosurgery, Sant'Anna University Hospital Ferrara, Via Aldo Moro 8, 44124, Cona (Ferrara), Italy.
| | - D Fuschillo
- Neurosurgery Division, M. Bufalini Hospital, Viale Ghirotti 286, 47521 Cesena, Italy
| | - A Musio
- Neurosurgery, Sant'Anna University Hospital Ferrara, Via Aldo Moro 8, 44124, Cona (Ferrara), Italy
| | - C Commodaro
- Neuroradiology Division, M. Bufalini Hospital, Viale Ghirotti 286, 47521 Cesena, Italy
| | | | - L Tosatto
- Neurosurgery Division, M. Bufalini Hospital, Viale Ghirotti 286, 47521 Cesena, Italy
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10
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D'Andrea M, Mongardi L, Cultrera F, Lenge M, Tosatto L, Giordano F. Long-term outcomes of endoscopic third ventriculostomy for Blake's pouch cyst in adults. Clin Neurol Neurosurg 2021; 202:106502. [PMID: 33529964 DOI: 10.1016/j.clineuro.2021.106502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 11/17/2022]
Affiliation(s)
- M D'Andrea
- Neurosurgery, M. Bufalini Hospital, Viale Ghirotti 286, 47521 Cesena, Italy
| | - L Mongardi
- Neurosurgery, M. Bufalini Hospital, Viale Ghirotti 286, 47521 Cesena, Italy; Neurosurgery, Sant'Anna University Hospital Ferrara, Via Aldo Moro 8, 44124 Cona, Ferrara, Italy.
| | - F Cultrera
- Neurosurgery, M. Bufalini Hospital, Viale Ghirotti 286, 47521 Cesena, Italy
| | - M Lenge
- Neurosurgery Department, Children's Hospital A. Meyer, University of Florence, Viale Pieraccini 24, Florence 50139, Italy
| | - L Tosatto
- Neurosurgery, Sant'Anna University Hospital Ferrara, Via Aldo Moro 8, 44124 Cona, Ferrara, Italy
| | - F Giordano
- Neurosurgery Department, Children's Hospital A. Meyer, University of Florence, Viale Pieraccini 24, Florence 50139, Italy
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11
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Spagnolli G, Massignan T, Astolfi A, Biggi S, Rigoli M, Brunelli P, Libergoli M, Ianeselli A, Orioli S, Boldrini A, Terruzzi L, Bonaldo V, Maietta G, Lorenzo NL, Fernandez LC, Codeseira YB, Tosatto L, Linsenmeier L, Vignoli B, Petris G, Gasparotto D, Pennuto M, Guella G, Canossa M, Altmeppen HC, Lolli G, Biressi S, Pastor MM, Requena JR, Mancini I, Barreca ML, Faccioli P, Biasini E. Pharmacological inactivation of the prion protein by targeting a folding intermediate. Commun Biol 2021; 4:62. [PMID: 33437023 PMCID: PMC7804251 DOI: 10.1038/s42003-020-01585-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 12/09/2020] [Indexed: 01/05/2023] Open
Abstract
Recent computational advancements in the simulation of biochemical processes allow investigating the mechanisms involved in protein regulation with realistic physics-based models, at an atomistic level of resolution. These techniques allowed us to design a drug discovery approach, named Pharmacological Protein Inactivation by Folding Intermediate Targeting (PPI-FIT), based on the rationale of negatively regulating protein levels by targeting folding intermediates. Here, PPI-FIT was tested for the first time on the cellular prion protein (PrP), a cell surface glycoprotein playing a key role in fatal and transmissible neurodegenerative pathologies known as prion diseases. We predicted the all-atom structure of an intermediate appearing along the folding pathway of PrP and identified four different small molecule ligands for this conformer, all capable of selectively lowering the load of the protein by promoting its degradation. Our data support the notion that the level of target proteins could be modulated by acting on their folding pathways, implying a previously unappreciated role for folding intermediates in the biological regulation of protein expression. Spagnolli, Massignan, Astolfi et al. design a new drug discovery approach, termed Pharmacological Protein Inactivation by Folding Intermediate Targeting, in which folding intermediates of disease-causing proteins are targeted. They test it on the cellular prion protein, identifying ligands stabilizing a folding intermediate and consequently promoting its degradation by the cellular quality control machinery.
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Affiliation(s)
- Giovanni Spagnolli
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy
| | - Tania Massignan
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy.,Sibylla Biotech SRL, 37121, Verona, VR, Italy
| | - Andrea Astolfi
- Department of Pharmaceutical Sciences, University of Perugia, 06123, Perugia, PG, Italy
| | - Silvia Biggi
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy
| | - Marta Rigoli
- Department of Physics, University of Trento, Povo, Trento, TN, Italy
| | - Paolo Brunelli
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy
| | - Michela Libergoli
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy
| | - Alan Ianeselli
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy
| | - Simone Orioli
- Department of Physics, University of Trento, Povo, Trento, TN, Italy.,INFN-TIFPA, University of Trento, Povo, Trento, TN, Italy
| | - Alberto Boldrini
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Sibylla Biotech SRL, 37121, Verona, VR, Italy
| | - Luca Terruzzi
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Sibylla Biotech SRL, 37121, Verona, VR, Italy
| | - Valerio Bonaldo
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy
| | - Giulia Maietta
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy
| | - Nuria L Lorenzo
- CIMUS Biomedical Research Institute, University of Santiago de Compostela-IDIS, Santiago de Compostela, Spain
| | - Leticia C Fernandez
- CIMUS Biomedical Research Institute, University of Santiago de Compostela-IDIS, Santiago de Compostela, Spain
| | - Yaiza B Codeseira
- CIMUS Biomedical Research Institute, University of Santiago de Compostela-IDIS, Santiago de Compostela, Spain
| | - Laura Tosatto
- Institute of Biophysics, National Council of Research, 38123 Povo, Trento, TN, Italy
| | - Luise Linsenmeier
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Beatrice Vignoli
- Department of Physics, University of Trento, Povo, Trento, TN, Italy
| | - Gianluca Petris
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy
| | - Dino Gasparotto
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy
| | - Maria Pennuto
- Department of Biomedical Sciences (DBS), University of Padova, 35131, Padova, Italy.,Veneto Institute of Molecular Medicine (VIMM), 35129, Padova, Italy
| | - Graziano Guella
- Department of Physics, University of Trento, Povo, Trento, TN, Italy
| | - Marco Canossa
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy
| | - Hermann C Altmeppen
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Graziano Lolli
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy
| | - Stefano Biressi
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy.,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy
| | - Manuel M Pastor
- RIAIDT, University of Santiago de Compostela-IDIS, Santiago de Compostela, Spain
| | - Jesús R Requena
- CIMUS Biomedical Research Institute, University of Santiago de Compostela-IDIS, Santiago de Compostela, Spain
| | - Ines Mancini
- Department of Physics, University of Trento, Povo, Trento, TN, Italy
| | - Maria L Barreca
- Department of Pharmaceutical Sciences, University of Perugia, 06123, Perugia, PG, Italy.
| | - Pietro Faccioli
- Department of Physics, University of Trento, Povo, Trento, TN, Italy. .,INFN-TIFPA, University of Trento, Povo, Trento, TN, Italy.
| | - Emiliano Biasini
- Department of Cellular, Computational and Integrative Biology, University of Trento, 38123, Povo, TN, Italy. .,Dulbecco Telethon Institute, University of Trento, 38123, Povo, TN, Italy.
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12
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D'Andrea M, Mongardi L, Fuschillo D, Tosatto L. Type 1 trigeminal neuralgia caused by a SCA secondary branch running through the Vth nerve. Acta Neurol Belg 2020; 120:1481-1482. [PMID: 32770497 DOI: 10.1007/s13760-020-01458-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 07/27/2020] [Indexed: 11/25/2022]
Affiliation(s)
- M D'Andrea
- Neurosurgery Division, M. Bufalini Hospital, Viale Ghirotti 286, 47521, Cesena, Italy
| | - L Mongardi
- Neurosurgery, Sant'Anna University Hospital Ferrara, Via Aldo Moro 8, 44124, Cona, Ferrara, Italy.
| | - D Fuschillo
- Neurosurgery Division, M. Bufalini Hospital, Viale Ghirotti 286, 47521, Cesena, Italy
| | - L Tosatto
- Neurosurgery Division, M. Bufalini Hospital, Viale Ghirotti 286, 47521, Cesena, Italy
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13
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Martínez-Rojas VA, Jiménez-Garduño AM, Michelatti D, Tosatto L, Marchioretto M, Arosio D, Basso M, Pennuto M, Musio C. ClC-2-like Chloride Current Alterations in a Cell Model of Spinal and Bulbar Muscular Atrophy, a Polyglutamine Disease. J Mol Neurosci 2020; 71:662-674. [PMID: 32856205 DOI: 10.1007/s12031-020-01687-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 08/14/2020] [Indexed: 12/21/2022]
Abstract
Spinal and bulbar muscular atrophy (SBMA) is a neuromuscular disease caused by expansions of a polyglutamine (polyQ) tract in the androgen receptor (AR) gene. SBMA is associated with the progressive loss of lower motor neurons, together with muscle weakness and atrophy. PolyQ-AR is converted to a toxic species upon binding to its natural ligands, testosterone, and dihydrotestosterone (DHT). Our previous patch-clamp studies on a motor neuron-derived cell model of SBMA showed alterations in voltage-gated ion currents. Here, we identified and characterized chloride currents most likely belonging to the chloride channel-2 (ClC-2) subfamily, which showed significantly increased amplitudes in the SBMA cells. The treatment with the pituitary adenylyl cyclase-activating polypeptide (PACAP), a neuropeptide with a proven protective effect in a mouse model of SBMA, recovered chloride channel current alterations in SBMA cells. These observations suggest that the CIC-2 currents are affected in SBMA, an alteration that may contribute and potentially determine the pathophysiology of the disease.
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Affiliation(s)
- Vladimir A Martínez-Rojas
- Institute of Biophysics (IBF), Trento Unit, National Research Council (CNR) & LabSSAH, Bruno Kessler Foundation (FBK), Trento, Italy
| | - Aura M Jiménez-Garduño
- Institute of Biophysics (IBF), Trento Unit, National Research Council (CNR) & LabSSAH, Bruno Kessler Foundation (FBK), Trento, Italy.,Departamento de Ciencias de la Salud, Escuela de Ciencias, Universidad de las Américas Puebla (UDLAP), San Andrés Cholula, Puebla, Mexico
| | - Daniela Michelatti
- Institute of Biophysics (IBF), Trento Unit, National Research Council (CNR) & LabSSAH, Bruno Kessler Foundation (FBK), Trento, Italy.,CIBIO Department, Laboratory of Chromatin Biology and Epigenetics, University of Trento, Trento, Italy
| | - Laura Tosatto
- Institute of Biophysics (IBF), Trento Unit, National Research Council (CNR) & LabSSAH, Bruno Kessler Foundation (FBK), Trento, Italy
| | - Marta Marchioretto
- Institute of Biophysics (IBF), Trento Unit, National Research Council (CNR) & LabSSAH, Bruno Kessler Foundation (FBK), Trento, Italy
| | - Daniele Arosio
- Institute of Biophysics (IBF), Trento Unit, National Research Council (CNR) & LabSSAH, Bruno Kessler Foundation (FBK), Trento, Italy
| | - Manuela Basso
- CIBIO Department, Laboratory of Transcriptional Neurobiology, University of Trento, Trento, Italy
| | - Maria Pennuto
- Department of Biomedical Sciences, University of Padova, Padova, Italy.,Padova Neuroscience Center (PNC), University of Padova, Padova, Italy.,Veneto Institute of Molecular Medicine, Padova, Italy
| | - Carlo Musio
- Institute of Biophysics (IBF), Trento Unit, National Research Council (CNR) & LabSSAH, Bruno Kessler Foundation (FBK), Trento, Italy.
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14
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Choi ML, Horrocks MH, Rodrigues M, De S, Tosatto L, Zhang W, Virdi G, Klenerman D, Abramov AY, Gandhi S. Tracking Oligomerization of Alpha-Synuclein Demonstrates Pivotal Role of Mitochondria in Seeding. Biophys J 2020. [DOI: 10.1016/j.bpj.2019.11.1289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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15
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Whiten DR, Cox D, Horrocks MH, Taylor CG, De S, Flagmeier P, Tosatto L, Kumita JR, Ecroyd H, Dobson CM, Klenerman D, Wilson MR. Single-Molecule Characterization of the Interactions between Extracellular Chaperones and Toxic α-Synuclein Oligomers. Cell Rep 2019; 23:3492-3500. [PMID: 29924993 PMCID: PMC6024880 DOI: 10.1016/j.celrep.2018.05.074] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 03/26/2018] [Accepted: 05/22/2018] [Indexed: 12/28/2022] Open
Abstract
The aberrant aggregation of α-synuclein is associated with several human diseases, collectively termed the α-synucleinopathies, which includes Parkinson’s disease. The progression of these diseases is, in part, mediated by extracellular α-synuclein oligomers that may exert effects through several mechanisms, including prion-like transfer, direct cytotoxicity, and pro-inflammatory actions. In this study, we show that two abundant extracellular chaperones, clusterin and α2-macroglobulin, directly bind to exposed hydrophobic regions on the surface of α-synuclein oligomers. Using single-molecule fluorescence techniques, we found that clusterin, unlike α2-macroglobulin, exhibits differential binding to α-synuclein oligomers that may be related to structural differences between two previously described forms of αS oligomers. The binding of both chaperones reduces the ability of the oligomers to permeabilize lipid membranes and prevents an oligomer-induced increase in ROS production in cultured neuronal cells. Taken together, these data suggest a neuroprotective role for extracellular chaperones in suppressing the toxicity associated with α-synuclein oligomers. Two extracellular chaperones directly bind to α-synuclein oligomers The binding is mediated by hydrophobicity on the oligomer surface Bound chaperones significantly attenuate the toxicity of α-synuclein oligomers
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Affiliation(s)
- Daniel R Whiten
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK; Illawarra Health and Medical Research Institute, School of Biological Sciences, University of Wollongong, Wollongong 2522, NSW, Australia
| | - Dezerae Cox
- Illawarra Health and Medical Research Institute, School of Biological Sciences, University of Wollongong, Wollongong 2522, NSW, Australia
| | - Mathew H Horrocks
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK; Illawarra Health and Medical Research Institute, School of Biological Sciences, University of Wollongong, Wollongong 2522, NSW, Australia
| | - Christopher G Taylor
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Suman De
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Patrick Flagmeier
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Laura Tosatto
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Janet R Kumita
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Heath Ecroyd
- Illawarra Health and Medical Research Institute, School of Biological Sciences, University of Wollongong, Wollongong 2522, NSW, Australia
| | - Christopher M Dobson
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - David Klenerman
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK; UK Dementia Research Institute, University of Cambridge, Cambridge CB2 0XY, UK.
| | - Mark R Wilson
- Illawarra Health and Medical Research Institute, School of Biological Sciences, University of Wollongong, Wollongong 2522, NSW, Australia.
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16
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Iljina M, Dear AJ, Garcia GA, De S, Tosatto L, Flagmeier P, Whiten DR, Michaels TCT, Frenkel D, Dobson CM, Knowles TPJ, Klenerman D. Quantifying Co-Oligomer Formation by α-Synuclein. ACS Nano 2018; 12:10855-10866. [PMID: 30371053 PMCID: PMC6262461 DOI: 10.1021/acsnano.8b03575] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Small oligomers of the protein α-synuclein (αS) are highly cytotoxic species associated with Parkinson's disease (PD). In addition, αS can form co-aggregates with its mutational variants and with other proteins such as amyloid-β (Aβ) and tau, which are implicated in Alzheimer's disease. The processes of self-oligomerization and co-oligomerization of αS are, however, challenging to study quantitatively. Here, we have utilized single-molecule techniques to measure the equilibrium populations of oligomers formed in vitro by mixtures of wild-type αS with its mutational variants and with Aβ40, Aβ42, and a fragment of tau. Using a statistical mechanical model, we find that co-oligomer formation is generally more favorable than self-oligomer formation at equilibrium. Furthermore, self-oligomers more potently disrupt lipid membranes than do co-oligomers. However, this difference is sometimes outweighed by the greater formation propensity of co-oligomers when multiple proteins coexist. Our results suggest that co-oligomer formation may be important in PD and related neurodegenerative diseases.
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Affiliation(s)
- Marija Iljina
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Alexander J. Dear
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
- Department
of Chemistry, Centre for Misfolding Diseases, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Gonzalo A. Garcia
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Suman De
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Laura Tosatto
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Patrick Flagmeier
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
- Department
of Chemistry, Centre for Misfolding Diseases, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Daniel R. Whiten
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Thomas C. T. Michaels
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Daan Frenkel
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Christopher M. Dobson
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
- Department
of Chemistry, Centre for Misfolding Diseases, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
| | - Tuomas P. J. Knowles
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
- Department
of Chemistry, Centre for Misfolding Diseases, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
- E-mail:
| | - David Klenerman
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United
Kingdom
- UK
Dementia Research Institute, University of Cambridge, Cambridge CB2 0XY, United Kingdom
- E-mail:
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17
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Kundel F, Tosatto L, Whiten DR, Wirthensohn DC, Horrocks MH, Klenerman D. Shedding light on aberrant interactions - a review of modern tools for studying protein aggregates. FEBS J 2018; 285:3604-3630. [PMID: 29453901 DOI: 10.1111/febs.14409] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 01/27/2018] [Accepted: 02/12/2018] [Indexed: 12/15/2022]
Abstract
The link between protein aggregation and neurodegenerative disease is well established. However, given the heterogeneity of species formed during the aggregation process, it is difficult to delineate details of the molecular events involved in generating pathological aggregates from those producing soluble monomers. As aberrant aggregates are possible pharmacological targets for the treatment of neurodegenerative diseases, the need to observe and characterise soluble oligomers has pushed traditional biophysical techniques to their limits, leading to the development of a plethora of new tools capable of detecting soluble oligomers with high precision and specificity. In this review, we discuss a range of modern biophysical techniques that have been developed to study protein aggregation, and give an overview of how they have been used to understand, in detail, the aberrant aggregation of amyloidogenic proteins associated with the two most common neurodegenerative disorders, Alzheimer's disease and Parkinson's disease.
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Affiliation(s)
| | - Laura Tosatto
- Centre for Integrative Biology, Università degli Studi di Trento, Italy
| | | | | | | | - David Klenerman
- Department of Chemistry, University of Cambridge, UK.,UK Dementia Research Institute, University of Cambridge, UK
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18
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Franceschi E, Tosoni A, Depenni R, Urbini B, Faedi M, Michiara M, Biasini C, Giombelli E, Pavesi G, Zanelli F, Cavallo M, Tosatto L, Fioravanti A, Zunarelli E, Lanza G, Bartolini D, Silini E, Brandes A. Gender and MGMT methylation in glioblastoma patients: interactions in the PERNO prospective study. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Tosoni A, Franceschi E, Depenni R, Urbini B, Faedi M, Michiara M, Biasini C, Giombelli E, Pavesi G, Zanelli F, Cavallo M, Tosatto L, Fioravanti A, Zunarelli E, Lanza G, Bartolini D, Silini E, Brandes A. The prognostic role of gender and MGMT methylation status in glioblastoma patients: The female power. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx366.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Borgia D, Malena A, Spinazzi M, Desbats MA, Salviati L, Russell AP, Miotto G, Tosatto L, Pegoraro E, Sorarù G, Pennuto M, Vergani L. Increased mitophagy in the skeletal muscle of spinal and bulbar muscular atrophy patients. Hum Mol Genet 2017; 26:1087-1103. [PMID: 28087734 PMCID: PMC5409076 DOI: 10.1093/hmg/ddx019] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 12/21/2016] [Indexed: 12/13/2022] Open
Abstract
Spinal and bulbar muscular atrophy (SBMA) is a neuromuscular disorder caused by polyglutamine expansion in the androgen receptor (AR) and characterized by the loss of lower motor neurons. Here we investigated pathological processes occurring in muscle biopsy specimens derived from SBMA patients and, as controls, age-matched healthy subjects and patients suffering from amyotrophic lateral sclerosis (ALS) and neurogenic atrophy. We detected atrophic fibers in the muscle of SBMA, ALS and neurogenic atrophy patients. In addition, SBMA muscle was characterized by the presence of a large number of hypertrophic fibers, with oxidative fibers having a larger size compared with glycolytic fibers. Polyglutamine-expanded AR expression was decreased in whole muscle, yet enriched in the nucleus, and localized to mitochondria. Ultrastructural analysis revealed myofibrillar disorganization and streaming in zones lacking mitochondria and degenerating mitochondria. Using molecular (mtDNA copy number), biochemical (citrate synthase and respiratory chain enzymes) and morphological (dark blue area in nicotinamide adenine dinucleotide-stained muscle cross-sections) analyses, we found a depletion of the mitochondria associated with enhanced mitophagy. Mass spectrometry analysis revealed an increase of phosphatidylethanolamines and phosphatidylserines in mitochondria isolated from SBMA muscles, as well as a 50% depletion of cardiolipin associated with decreased expression of the cardiolipin synthase gene. These observations suggest a causative link between nuclear polyglutamine-expanded AR accumulation, depletion of mitochondrial mass, increased mitophagy and altered mitochondrial membrane composition in SBMA muscle patients. Given the central role of mitochondria in cell bioenergetics, therapeutic approaches toward improving the mitochondrial network are worth considering to support SBMA patients.
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Affiliation(s)
- Doriana Borgia
- Department of Neurosciences, University of Padova, Padova, Italy
| | - Adriana Malena
- Department of Neurosciences, University of Padova, Padova, Italy
| | - Marco Spinazzi
- VIB Center for the Biology of Disease, KU Leuven Center for Human Genetics, Leuven, Belgium
| | - Maria Andrea Desbats
- Clinical Genetics Unit, Department of Woman and Child Health, University of Padova, Padova, Italy, and IRP Città della Speranza, Padova, Italy
| | - Leonardo Salviati
- Clinical Genetics Unit, Department of Woman and Child Health, University of Padova, Padova, Italy, and IRP Città della Speranza, Padova, Italy
| | - Aaron P Russell
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Burwood, Australia
| | - Giovanni Miotto
- Department of Molecular Medicine, University of Padova, Padova, Italy.,Proteomic Center of Padova University, VIMM and Padova University Hospital, Padova, Italy
| | - Laura Tosatto
- Dulbecco Telethon Institute, Centre for Integrative Biology, University of Trento, Trento, Italy
| | - Elena Pegoraro
- Department of Neurosciences, University of Padova, Padova, Italy
| | - Gianni Sorarù
- Department of Neurosciences, University of Padova, Padova, Italy
| | - Maria Pennuto
- Dulbecco Telethon Institute, Centre for Integrative Biology, University of Trento, Trento, Italy
| | - Lodovica Vergani
- Department of Neurosciences, University of Padova, Padova, Italy
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21
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Minardi C, Fedeli G, Bocchino M, Tosatto L. 7. Intraoperative seizures during intraoperative motor monitoring: A retrospective study. Clin Neurophysiol 2016. [DOI: 10.1016/j.clinph.2016.10.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Pignatta S, Arienti C, Zanoni M, Zamagni A, Collina S, Tosatto L, Cortesi M, Nigrisoli E, Bartolini D, Faedi M, Bonafè M, Tesei A. Novel pan sigma receptor modulator exerts strong apoptotic effect in in vitro primary 3D-cell cultures of human glioblastoma. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)33035-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Iljina M, Tosatto L, Choi ML, Sang JC, Ye Y, Hughes CD, Bryant CE, Gandhi S, Klenerman D. Arachidonic acid mediates the formation of abundant alpha-helical multimers of alpha-synuclein. Sci Rep 2016; 6:33928. [PMID: 27671749 PMCID: PMC5037366 DOI: 10.1038/srep33928] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Accepted: 08/31/2016] [Indexed: 12/12/2022] Open
Abstract
The protein alpha-synuclein (αS) self-assembles into toxic beta-sheet aggregates in Parkinson’s disease, while it is proposed that αS forms soluble alpha-helical multimers in healthy neurons. Here, we have made αS multimers in vitro using arachidonic acid (ARA), one of the most abundant fatty acids in the brain, and characterized them by a combination of bulk experiments and single-molecule Fӧrster resonance energy transfer (sm-FRET) measurements. The data suggest that ARA-induced oligomers are alpha-helical, resistant to fibril formation, more prone to disaggregation, enzymatic digestion and degradation by the 26S proteasome, and lead to lower neuronal damage and reduced activation of microglia compared to the oligomers formed in the absence of ARA. These multimers can be formed at physiologically-relevant concentrations, and pathological mutants of αS form less multimers than wild-type αS. Our work provides strong biophysical evidence for the formation of alpha-helical multimers of αS in the presence of a biologically relevant fatty acid, which may have a protective role with respect to the generation of beta-sheet toxic structures during αS fibrillation.
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Affiliation(s)
- Marija Iljina
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Laura Tosatto
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Minee L Choi
- Department of Molecular Neuroscience, University College London, Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | - Jason C Sang
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Yu Ye
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.,Department of Cell Biology, Harvard Medical School, Boston, 02115, USA
| | - Craig D Hughes
- Department of Veterinary Medicine, University Of Cambridge, Madingley Road, Cambridge, CB3 0ES, United Kingdom
| | - Clare E Bryant
- Department of Veterinary Medicine, University Of Cambridge, Madingley Road, Cambridge, CB3 0ES, United Kingdom
| | - Sonia Gandhi
- Department of Molecular Neuroscience, University College London, Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | - David Klenerman
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
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24
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Horrocks MH, Lee SF, Gandhi S, Magdalinou NK, Chen SW, Devine MJ, Tosatto L, Kjaergaard M, Beckwith JS, Zetterberg H, Iljina M, Cremades N, Dobson CM, Wood NW, Klenerman D. Single-Molecule Imaging of Individual Amyloid Protein Aggregates in Human Biofluids. ACS Chem Neurosci 2016; 7:399-406. [PMID: 26800462 PMCID: PMC4800427 DOI: 10.1021/acschemneuro.5b00324] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
![]()
The misfolding and aggregation of
proteins into amyloid fibrils
characterizes many neurodegenerative disorders such as Parkinson’s
and Alzheimer’s diseases. We report here a method, termed SAVE
(single aggregate visualization by enhancement) imaging, for the ultrasensitive
detection of individual amyloid fibrils and oligomers using single-molecule
fluorescence microscopy. We demonstrate that this method is able to
detect the presence of amyloid aggregates of α-synuclein, tau,
and amyloid-β. In addition, we show that aggregates can also
be identified in human cerebrospinal fluid (CSF). Significantly, we
see a twofold increase in the average aggregate concentration in CSF
from Parkinson’s disease patients compared to age-matched controls.
Taken together, we conclude that this method provides an opportunity
to characterize the structural nature of amyloid aggregates in a key
biofluid, and therefore has the potential to study disease progression
in both animal models and humans to enhance our understanding of neurodegenerative
disorders.
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Affiliation(s)
- Mathew H. Horrocks
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Steven F. Lee
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Sonia Gandhi
- Department
of Molecular Neuroscience, Institute of Neurology, University College London, Queen Square, London WC1N
3BG, United Kingdom
| | - Nadia K. Magdalinou
- Reta
Lila Weston Institute of Neurological Studies, University College London, 1 Wakefield Street, London WC1N 1PJ, United Kingdom
| | - Serene W. Chen
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Michael J. Devine
- Division
of Brain Sciences, Imperial College of London, Hammersmith Hospital, Du Cane Road, London W12
0NN, United Kingdom
| | - Laura Tosatto
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Magnus Kjaergaard
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Joseph S. Beckwith
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Henrik Zetterberg
- Department
of Molecular Neuroscience, Institute of Neurology, University College London, Queen Square, London WC1N
3BG, United Kingdom
- Clinical
Neurochemistry Laboratory, Department of Psychiatry and Neurochemistry,
Institute of Neuroscience and Physiology, the Sahlgrenska Academy, University College University of Gothenburg, Mölndal, Sweden
| | - Marija Iljina
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Nunilo Cremades
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Christopher M. Dobson
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Nicholas W. Wood
- Department
of Molecular Neuroscience, Institute of Neurology, University College London, Queen Square, London WC1N
3BG, United Kingdom
| | - David Klenerman
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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25
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Choi ML, Yao Z, Tosatto L, Klenerman D, Abramov AY, Gandhi S. Strain Dependent Effects of Alpha-Synuclein Mutations on Mitochondrial Dysfunction. Biophys J 2016. [DOI: 10.1016/j.bpj.2015.11.2522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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26
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Tosatto L, Horrocks MH, Dear AJ, Knowles TPJ, Dalla Serra M, Cremades N, Dobson CM, Klenerman D. Single-molecule FRET studies on alpha-synuclein oligomerization of Parkinson's disease genetically related mutants. Sci Rep 2015; 5:16696. [PMID: 26582456 PMCID: PMC4652217 DOI: 10.1038/srep16696] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 10/19/2015] [Indexed: 12/22/2022] Open
Abstract
Oligomers of alpha-synuclein are toxic to cells and have been proposed to play a key role in the etiopathogenesis of Parkinson's disease. As certain missense mutations in the gene encoding for alpha-synuclein induce early-onset forms of the disease, it has been suggested that these variants might have an inherent tendency to produce high concentrations of oligomers during aggregation, although a direct experimental evidence for this is still missing. We used single-molecule Förster Resonance Energy Transfer to visualize directly the protein self-assembly process by wild-type alpha-synuclein and A53T, A30P and E46K mutants and to compare the structural properties of the ensemble of oligomers generated. We found that the kinetics of oligomer formation correlates with the natural tendency of each variant to acquire beta-sheet structure. Moreover, A53T and A30P showed significant differences in the averaged FRET efficiency of one of the two types of oligomers formed compared to the wild-type oligomers, indicating possible structural variety among the ensemble of species generated. Importantly, we found similar concentrations of oligomers during the lag-phase of the aggregation of wild-type and mutated alpha-synuclein, suggesting that the properties of the ensemble of oligomers generated during self-assembly might be more relevant than their absolute concentration for triggering neurodegeneration.
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Affiliation(s)
- Laura Tosatto
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK.,Istituto di Biofisica, Consiglio Nazionale delle Ricerche, via alla Cascata 56/C, 38123 Trento, Italy
| | - Mathew H Horrocks
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK
| | - Alexander J Dear
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK
| | - Tuomas P J Knowles
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK
| | - Mauro Dalla Serra
- Istituto di Biofisica, Consiglio Nazionale delle Ricerche, via alla Cascata 56/C, 38123 Trento, Italy
| | - Nunilo Cremades
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK.,Institute for Biocomputation and Physics of Complex Systems (BIFI), Universidad de Zaragoza, Mariano Esquillor, Edificio I+D, 50018 Zaragoza, Spain
| | - Christopher M Dobson
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK
| | - David Klenerman
- Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, UK
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27
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Horrocks MH, Tosatto L, Dear AJ, Garcia GA, Iljina M, Cremades N, Dalla Serra M, Knowles TPJ, Dobson CM, Klenerman D. Fast Flow Microfluidics and Single-Molecule Fluorescence for the Rapid Characterization of α-Synuclein Oligomers. Anal Chem 2015; 87:8818-26. [DOI: 10.1021/acs.analchem.5b01811] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Mathew H. Horrocks
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Laura Tosatto
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
- Istituto
di Biofisica,
CNR, U.O., Trento, Trentino, Italy
| | - Alexander J. Dear
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Gonzalo A. Garcia
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Marija Iljina
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Nunilo Cremades
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | | | - Tuomas P. J. Knowles
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Christopher M. Dobson
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - David Klenerman
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
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28
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Plotegher N, Kumar D, Tessari I, Brucale M, Munari F, Tosatto L, Belluzzi E, Greggio E, Bisaglia M, Capaldi S, Aioanei D, Mammi S, Monaco HL, Samo B, Bubacco L. The chaperone-like protein 14-3-3η interacts with human α-synuclein aggregation intermediates rerouting the amyloidogenic pathway and reducing α-synuclein cellular toxicity. Hum Mol Genet 2014; 23:5615-29. [PMID: 24895406 DOI: 10.1093/hmg/ddu275] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Familial and idiopathic Parkinson's disease (PD) is associated with the abnormal neuronal accumulation of α-synuclein (aS) leading to β-sheet-rich aggregates called Lewy Bodies (LBs). Moreover, single point mutation in aS gene and gene multiplication lead to autosomal dominant forms of PD. A connection between PD and the 14-3-3 chaperone-like proteins was recently proposed, based on the fact that some of the 14-3-3 isoforms can interact with genetic PD-associated proteins such as parkin, LRRK2 and aS and were found as components of LBs in human PD. In particular, a direct interaction between 14-3-3η and aS was reported when probed by co-immunoprecipitation from cell models, from parkinsonian brains and by surface plasmon resonance in vitro. However, the mechanisms through which 14-3-3η and aS interact in PD brains remain unclear. Herein, we show that while 14-3-3η is unable to bind monomeric aS, it interacts with aS oligomers which occur during the early stages of aS aggregation. This interaction diverts the aggregation process even when 14-3-3η is present in sub-stoichiometric amounts relative to aS. When aS level is overwhelmingly higher than that of 14-3-3η, the fibrillation process becomes a sequestration mechanism for 14-3-3η, undermining all processes governed by this protein. Using a panel of complementary techniques, we single out the stage of aggregation at which the aS/14-3-3η interaction occurs, characterize the products of the resulting processes, and show how the processes elucidated in vitro are relevant in cell models. Our findings constitute a first step in elucidating the molecular mechanism of aS/14-3-3η interaction and in understanding the critical aggregation step at which 14-3-3η has the potential to rescue aS-induced cellular toxicity.
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Affiliation(s)
| | - Dhruv Kumar
- Department of Biochemistry, University of Bologna, Bologna, Italy
| | | | - Marco Brucale
- Department of Biochemistry, University of Bologna, Bologna, Italy, ISMN-National Council of Research, Rome, Italy and
| | - Francesca Munari
- Department of Chemical Sciences, University of Padova, Padova, Italy
| | | | | | | | | | - Stefano Capaldi
- Department of Biotechnology, University of Verona, Verona, Italy
| | - Daniel Aioanei
- Department of Biochemistry, University of Bologna, Bologna, Italy
| | - Stefano Mammi
- Department of Chemical Sciences, University of Padova, Padova, Italy
| | - Hugo L Monaco
- Department of Biotechnology, University of Verona, Verona, Italy
| | - Bruno Samo
- Department of Biochemistry, University of Bologna, Bologna, Italy
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29
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Tosatto L, Horrocks MH, Nunilo C, Guilliams T, Serra MD, Klenerman D. Single Molecule FRET Characterization of Oligomers from Alpha-Synuclein Early Onset Parkinson's Disease Mutants. Biophys J 2014. [DOI: 10.1016/j.bpj.2013.11.1575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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30
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Pivato M, De Franceschi G, Tosatto L, Frare E, Kumar D, Aioanei D, Brucale M, Tessari I, Bisaglia M, Samori B, de Laureto PP, Bubacco L. Covalent α-synuclein dimers: chemico-physical and aggregation properties. PLoS One 2012; 7:e50027. [PMID: 23272053 PMCID: PMC3521728 DOI: 10.1371/journal.pone.0050027] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 10/15/2012] [Indexed: 11/29/2022] Open
Abstract
The aggregation of α-synuclein into amyloid fibrils constitutes a key step in the onset of Parkinson's disease. Amyloid fibrils of α-synuclein are the major component of Lewy bodies, histological hallmarks of the disease. Little is known about the mechanism of aggregation of α-synuclein. During this process, α-synuclein forms transient intermediates that are considered to be toxic species. The dimerization of α-synuclein could represent a rate-limiting step in the aggregation of the protein. Here, we analyzed four covalent dimers of α-synuclein, obtained by covalent link of the N-terms, C-terms, tandem cloning of two sequences and tandem juxtaposition in one protein of the 1–104 and 29–140 sequences. Their biophysical properties in solution were determined by CD, FT-IR and NMR spectroscopies. SDS-induced folding was also studied. The fibrils formation was analyzed by ThT and polarization fluorescence assays. Their morphology was investigated by TEM and AFM-based quantitative morphometric analysis. All dimers were found to be devoid of ordered secondary structure under physiological conditions and undergo α-helical transition upon interaction with SDS. All protein species are able to form amyloid-like fibrils. The reciprocal orientation of the α-synuclein monomers in the dimeric constructs affects the kinetics of the aggregation process and a scale of relative amyloidogenic propensity was determined. Structural investigations by FT IR spectroscopy, and proteolytic mapping of the fibril core did not evidence remarkable difference among the species, whereas morphological analyses showed that fibrils formed by dimers display a lower and diversified level of organization in comparison with α-synuclein fibrils. This study demonstrates that although α-synuclein dimerization does not imply the acquisition of a preferred conformation by the participating monomers, it can strongly affect the aggregation properties of the molecules. The results presented highlight a substantial role of the relative orientation of the individual monomer in the definition of the fibril higher structural levels.
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Affiliation(s)
- Micaela Pivato
- CRIBI Biotechnology Centre, University of Padova, Padova, Italy
| | | | - Laura Tosatto
- University of Padova, Department of Biology, Padova, Italy
| | - Erica Frare
- CRIBI Biotechnology Centre, University of Padova, Padova, Italy
| | - Dhruv Kumar
- University of Bologna, Department of Biochemistry, Bologna, Italy
| | - Daniel Aioanei
- University of Bologna, Department of Biochemistry, Bologna, Italy
| | - Marco Brucale
- CNR, Institute of Nanostructured Materials (ISMN), Montelibretti, Roma, Italy
| | | | - Marco Bisaglia
- University of Padova, Department of Biology, Padova, Italy
| | - Bruno Samori
- University of Bologna, Department of Biochemistry, Bologna, Italy
| | | | - Luigi Bubacco
- University of Padova, Department of Biology, Padova, Italy
- * E-mail: (PPDL); (LB)
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31
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Horrocks MH, Cremades N, Tosatto L, Guilliams T, De Genst E, Shim JU, Dobson CM, Klenerman D. Investigating the Factors Affecting the Aggregation of Alpha-Synuclein using Single Molecule Fluorescence and Fast Flow Microfluidics. Biophys J 2012. [DOI: 10.1016/j.bpj.2011.11.1407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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32
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Bisaglia M, Tosatto L, Munari F, Tessari I, de Laureto PP, Mammi S, Bubacco L. Dopamine quinones interact with alpha-synuclein to form unstructured adducts. Biochem Biophys Res Commun 2010; 394:424-8. [PMID: 20226175 DOI: 10.1016/j.bbrc.2010.03.044] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Accepted: 03/08/2010] [Indexed: 11/29/2022]
Abstract
alpha-Synuclein (alphasyn) fibril formation is considered a central event in the pathogenesis of Parkinson's disease (PD). In recent years, it has been proposed that prefibrillar annular oligomeric beta-sheet-rich species, called protofibrils, rather than fibrils themselves, may be the neurotoxic species. The oxidation products of dopamine (DAQ) can inhibit alphasyn fibril formation supporting the idea that DAQ might stabilize alphasyn protofibrils. In the present work, through different biochemical and biophysical techniques, we isolated and structurally characterized alphasyn/DAQ adducts. Contrary to protofibrils, we demonstrated that alphasyn/DAQ adducts retain an unfolded conformation. We then investigated the nature of the modifications induced on alphasyn by DAQ. Our results indicate that only a small fraction of alphasyn interacts with DAQ in a covalent way, so that non-covalent interaction appears to be the major modification induced by DAQ on alphasyn.
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Affiliation(s)
- Marco Bisaglia
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy
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Tosatto L, Plotegher N, Tessari I, Bisaglia M, Bubacco L, Serra MD. Insights on Channel-Like Activity of Membrane Bound Alpha-Synuclein. Biophys J 2010. [DOI: 10.1016/j.bpj.2009.12.606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Brucale M, Sandal M, Di Maio S, Rampioni A, Tessari I, Tosatto L, Bisaglia M, Bubacco L, Samorì B. Pathogenic Mutations Shift the Equilibria of α-Synuclein Single Molecules towards Structured Conformers. Chembiochem 2009; 10:176-83. [DOI: 10.1002/cbic.200800581] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Della Puppa A, Tosatto L, Amistà P, Munari M, Scienza R. Transverse sinus thrombosis after posterior fossa surgery for cerebellar tumor treated by endovascular thrombectomy. A case report. Neuroradiol J 2007; 20:562-5. [PMID: 24299946 DOI: 10.1177/197140090702000514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Accepted: 07/17/2007] [Indexed: 11/15/2022] Open
Abstract
Dural sinus thrombosis is a rare complication after posterior fossa surgery, particularly in cerebellar tumour surgery. The authors describe the case of a young male patient who presented a postoperative neurological deterioration due to transverse sinus thrombosis after surgery for cerebellar medulloblastoma. He was treated by mechanical clot thrombectomy using an endovascular catch system technique without anticoagulation therapy. Final angiographic recanalization was obtained. This kind of endoluminal mechanical revascularization is an efficacious method to treat dural sinus thrombosis during perioperative time but speed in diagnosis is crucial for clinical outcome.
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Affiliation(s)
- A Della Puppa
- Department of Neurosurgery; Neuro Intensive Care, Padua Hospital; Padua, Italy -
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de Laureto PP, Tosatto L, Frare E, Marin O, Uversky VN, Fontana A. Conformational Properties of the SDS-Bound State of α-Synuclein Probed by Limited Proteolysis: Unexpected Rigidity of the Acidic C-Terminal Tail. Biochemistry 2006; 45:11523-31. [PMID: 16981712 DOI: 10.1021/bi052614s] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Alpha-synuclein (alpha-syn) is a "natively unfolded" protein constituting the major component of intracellular inclusions in several neurodegenerative disorders. Here, we describe proteolysis experiments conducted on human alpha-syn in the presence of SDS micelles. Our aim was to unravel molecular features of micelle-bound alpha-syn using the limited proteolysis approach. The nonspecific proteases thermolysin and proteinase K, as well as the Glu-specific V8-protease, were used as proteolytic probes. While alpha-syn at neutral pH is easily degraded to a variety of relatively small fragments, in the presence of 10 mM SDS the proteolysis of the protein is rather selective. Complementary fragments 1-111 and 112-140, 1-113 and 114-140, and 1-123 and 124-140 are obtained when thermolysin, proteinase K, and V8 protease, respectively, are used. These results are in line with a conformational model of alpha-syn in which it acquires a folded helical structure in the N-terminal region in its membrane-bound state. At the same time, they indicate that the C-terminal portion of the molecule is rather rigid, as seen in its relative resistance to extensive proteolytic degradation. It is likely that, under the specific experimental conditions of proteolysis in the presence of SDS, the negatively charged C-terminal region can be rigidified by binding a calcium ion, as shown before with intact alpha-syn. In this study, some evidence of calcium binding properties of isolated C-terminal fragments 112-140, 114-140, and 124-140 was obtained by mass spectrometry measurements, since molecular masses for calcium-loaded fragments were obtained. Our results indicate that the C-terminal portion of the membrane-bound alpha-syn is quite rigid and structured, at variance from current models of the membrane-bound protein deduced mostly from NMR. Considering that the aggregation process of alpha-syn is modulated by its C-terminal tail, the results of this study may provide useful insights into the behavior of alpha-syn in a membrane-mimetic environment.
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Scanarini M, Tosatto L, Alessio L. Treatment of pituitary-dependent Cushing's disease: Long-term outcome. Clin Neurol Neurosurg 1997. [DOI: 10.1016/s0303-8467(97)81670-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Derlon JM, Petit-taboué MC, Dauphin F, Courtheoux P, Chapon F, Creissard P, Darcel F, Houtteville JP, Kaschten B, Sadzot B, Stevenaert A, Tjuvajev JG, Macapinlac HA, Daghighian F, Ginos JZ, Finn RD, Jiaju Zhang MS, Beattie B, Graham M, Larson SM, Blasberg RG, Levivier M, Goldman S, Pirotte B, Brucher JM, Balériaux D, Luxen A, Hildebrand J, Brotchi J, Go KG, Kamman RL, Mooyaart EL, Heesters MAAM, Sijens PE, Oudksrk M, van Dijk P, Levendag PC, Vecht CJ, Metz RJ, Kennedy DN, Rosen BR, Hochberg FH, Fishman AJ, Filipek PA, Caviness VS, Gross MW, Weinzierl FX, Trappe AE, Goebel WE, Frank AM, Becker G, Krone A, Schmidt K, Hofmann E, Bogdahn U, Bencsch H, Fclber S, Finkenstedt G, Kremser C, Sfockhammer G, Aichner F, Bogdahn U, Fröhlich T, Becker G, Krone A, Schlief R, Schürmann J, Jachimczak P, Hofmann E, Roggendorf W, Roosen K, Carapella CM, Carpinelli G, Passalacqua R, Raus L, Giannini M, Mastrostefano R, Podo F, Tofani A, Maslrostefano R, Mottoles M, Ferraironi A, Scelsa MG, Oppido P, Riccio A, Maini CL, Collombier L, Taillandier L, Dcbouverie M, Laurens MH, Thouvenot P, Weber M, Bertrand A, Cruickshank GS, Patterson J, Hadley D, De Witte O, Hildebrand J, Luxen A, Goldman S, Reifenberger J, Liu L, James CD, Wechsler W, Collins VP, Fabel-Schulte K, Jachimczak P, Heßdörfer B, Baur I, Schlingensiepen KH, Ernestus RI, Brysch W, Bogdahn U, Blesch A, Bosserhoff AK, Apfel R, Lottspeich F, Jachimczak P, Büttner R, Bogdahn U, Cece R, Bockhorst K, Barajon I, Tazzari S, Cavaletti G, Torri-Tarelli L, Tredici G, Hecht B, Turc-Carel C, Atllas R, Chatel M, Gaudray P, Eis M, Gioanni J, Hecht F, Balledux J, Rothbart D, Criscuolo GR, de Campos JM, Kusak ME, Rey JA, Bello MJ, Sarasa JL, Els T, Dubois F, Blond S, Parent M, Assaker R, Gosselin P, Christiaens JL, Feld R, Moringlane JR, Steudel WI, Schaudies JR, Hoehn-Berlage M, Janka M, Tonn JC, Fischer U, Meese E, Roosen K, Remmelink M, Salmon I, Cras P, Pasteels JL, Brotchi J, Gliese M, Kiss R, Bensadoun RJ, Frenay M, Formento JL, Milano G, Lagrange JL, Grellier P, Lee JY, Ernestus RI, Riese HH, Fründ R, Cervós-Navarro J, Reutter W, Lippitz B, Scheitinger C, Scholz M, Weis J, Gilsbach JM, Füzesi L, Koochekpour S, Merzak A, Geissler A, Pilkington GJ, Sanson M, Li YJ, Hoang-Xuan K, Delattre JY, Poisson M, Hamelin R, Van de Kelft E, Dams E, Martin JJ, Woertgen C, Willems P, Lehrke R, Voges J, Treuer H, Erdmann J, Müller RP, Sturm V, Wurm RE, Warrington AP, Laing RW, Holzschuh M, Sardell S, Hines F, Graham JD, Brada M, Ushio Y, Kuratsu JI, Kochi M, Kitz K, Aichholzer M, Rössler K, Goldman S, Alesch F, Ertl A, Sorensen PS, Helweg-Larsen S, Mourldsen H, Hansen HH, El Sharoum SY, Berfelo MW, Theunissen PHMH, Jager JJ, Levivier M, de Jong JMA, Fedorcsák I, Nyáry I, Osztie É, Horvath Á, Kontra G, Frenay M, Burgoni-chuzel J, Paquis P, Lagrange JL, Pirotte B, Helweg-Larsen S, Hansen SW, Sørensen PS, Salmon I, Kiss R, Krauseneck P, Müller B, Morche M, Tonn JC, Lagerwaard FJ, Brucher JM, Levendag PC, Eijkenboom WMH, Schmilz PIM, Lentzsch S, Weber F, Franke J, Dörken B, Lunardi P, Schettini G, Osman FJ, Luxen A, Qasho R, Mocellini C, Ruda R, Soffietti R, Garabello D, Sales S, De Lucchi R, Vasario E, Schiffer D, Muracciole X, Brotchi J, Régis J, Manera L, Peragut JC, Juin P, Sedan R, Nieder C, Niewald M, Walter K, Schnabel K, Nieder C, Hildebrand J, Niewald N, Nestle U, Schnabel K, Berberich W, Oschmann P, Theißen RD, Reuner KH, Kaps M, Dorndorf W, Martin KK, Hausmann O, Akinwunmi J, Rooprai HK, Kennedy A, Linke A, Ognjenovic N, Pilkington GJ, Svadovsky AI, Peresedov VV, Bulakov AA, Butyalko MY, Merlo A, Zhirnova IG, Labunsky DA, Gnazdizky VV, Gannushkina IV, Taphoorn MJB, Potman R, Barkhof F, Weerts JG, Karim ABMF, Heimans JJ, Jerrnann E, van de Pol M, van Aalst VC, Wilmink JT, Twijnstra A, van der Sande JJ, Boogerd W, Kröger R, Jäger A, Wismeth C, Dekant A, Uirich J, Brysch W, Schlingensiepen KH, Jachimczak P, Bogdahn U, Pirolte B, Cool V, Gérard C, Levivier M, Dargent JL, Goldman S, Chiquet-Ehrismann R, Brotchi J, Hildebrand J, Velu T, Herrlinger U, Schabet M, Ohneseit P, Buchholz R, Zhu J, Reszka R, Weber F, Müller J, Walther W, Zhang LI, Brock M, Roosen N, Rock JP, Zeng H, Feng J, Fenstermacher JD, Rosenblum ML, Siegal T, Mäcke H, Gabizon A, Beljanski M, Crochet S, Bergenheim AT, Zackrisson B, Elfverson J, Bergström P, Henriksson R, Butti G, Baetta R, Gratzl O, Magrassi L, De Renzis MR, Soma MR, Davegna C, Pezzotta S, Paoletti R, Fumagalli R, Infuso L, Sankar AA, Darling JL, Herholz K, Thomas DGT, Defer GL, Brugières P, Gray F, Chomienne C, Poirier J, Degos L, Degos JD, Colombo BM, DiDonato S, Ghaemi M, Finocchiaro G, Hebeda KM, Sterenborg HJCM, Saarnak AE, Wolbers JG, van Gemert MJC, Kaaijk P, Troost D, Leenstra S, Das PK, Würker M, Bosch DA, Kostron H, Hochleitner BW, Obwegeser A, Ortler M, Seiwald M, Vooys W, Krouwer HGJ, de Gast GC, Marx JJM, Pietrzyk U, Osman FJ, Lunardi P, Puzzilli F, Menovsky T, Beek JF, Wolbers JG, van Gemert MJC, Naujocks G, Wiestler OD, Schirrmacher V, Heiss WD, Schramm J, Schmitz A, Eis-Hübinger AM, Piepmeier PH, Pedersen P, Greer C, Quigley MR, Shih T, Elrifal A, Rothfus W, Kotitschke K, Maroon JC, Rohertson L, Rampling R, Whoteley TL, Piumb JA, Kerr DJ, Falina PA, Crossan IM, Roosen N, Rock JP, Brandl M, Feng J, Zeng H, Ho KL, Fenstermacher JD, Rosenblum ML, Ruchoux MM, Vincent S, Jonca F, Plouet J, Lecomte M, Tonn JC, Samid D, Thibault A, Ram Z, Oldfield EH, Myers CE, Reed E, Schabet M, Herrlinger U, Buchholz R, Shoshan Y, Haase A, Siegal T, Siegal T, Shezen E, Siegal T, Stockhammer G, Rosenblum M, Samid D, Lieberman F, Terzis AJA, Bjerkvig R, Bogdahn U, Laerum OD, Arnold H, Thibault A, Samid D, Figg WD, Myers CE, Reed E, Thomas R, Flux G, Chittenden S, Kotitschke K, Doshi P, Brazil L, Thomas DGT, Bignor D, Zalutsky M, Brada M, Tjuvajev J, Kaplitt M, Desai R, Bradley MS, Muigg S, Bettie BS, Gansbacher B, Blasberg R, Haugland HK, Saraste J, Rooseni K, Laerum OD, Vincent AJPE, Avezaat CJJ, Bout A, Felber S, Noteboom JL, Vecht CH, Valerio D, Hoogerbrugge PM, Weber F, Reszka R, Zhu J, Walther W, List J, Schulz W, Aichner F, Wolbers JG, Sterenborg IIJCM, Kamphorst W, van Gemert MJC, van Alplien HAM, Salander P, Bergenheim T, Henriksson R, Grant R, Brazil L, Haase A, Thomas R, Guerrero D, Laing R, Ashley S, Brada M, Schmidt B, Bauer B, Grau G, Bohnstedt T, Frydrych A, Bogdahn U, Franz K, Lorenz R, Brandes A, Amanzo PD, Zampieri P, Rigon A, Scelzi E, Rotilio A, Berti F, Paccagnella A, Krone A, Fiorentino MV, Müller B, Krauseneck P, van Deventer PL, Dellemijn PLI, van den Bent MJ, Vecht CJ, Kansen PJ, Tredici G, Petruccioli NG, Becker G, Cavaletti G, Cavalletti E, Kiburg B, Müller LJ, Moorer-van Delft CM, Heimans JJ, Boer HH, Pace A, Bove L, Pietrangeli A, Woydt M, Innocenti P, Aloe A, Nardi M, Jandolo B, Kellie SJ, De Graaf SSN, Bloemhof H, Roebuck D, Dalla PL, Uges DDR, Roggendorf W, Johnston I, Besser M, Chaseling RA, Koeppen S, Gründemann S, Lossos A, Siegal T, Nitschke M, Vieregge P, Reusche E, Hofmann E, Rob P, Kömpf D, Postma TJ, Vermorken JB, Heimans JJ, Rampling RP, Dunlop DJ, Steward MS, Campbell SM, Roy S, Bogdahn U, Hilkens PHE, Verweij J, van Putten WLJ, Vecht CJ, van den Bent MJ, Hilkens PHE, Moll JWB, van der Burg MEL, Planting AST, van Putten WLJ, Roosen K, Vecht CJ, van den Bent MJ, Wondrusch E, Zifko U, Drlicek M, Liszka U, Grisold W, Zifko U, Fazeny B, Dittrich C, Lanfermann H, Wondrusch E, Grisold W, Verschuuren JJ, Meneses PI, Rosenfeld MR, Kaplitt MG, Posner JB, Dalmau J, Sillevis Smitt PAE, Manley G, Heindel W, Posner JB, Cavaletti G, Bogliun G, Margorati L, Bianchi G, Drlicek M, Liska U, Casati B, Kolig C, Grisold H, Kugel H, Graus F, Reñe R, Uchuya M, Valldeoriola F, Delattre JY, Benedetti de Cosentiro C, Ortale D, Martinez R, Lambre J, Cagnolati S, Erneslus RI, Vinai C, Salmaggi A, Nemni R, Silvani A, Forno MG, Luksch R, Confalonieri P, Boiardi A, Nitschke M, Scholz J, Röhn G, Vieregge P, Kömpf D, Hochberg FH, Pfeiffer G, Netzer J, Hansen C, Eggers C, Hagel C, Kunze K, Verschuuren JJ, Lackner K, Rosenblum MK, Lieberman FS, Posner JB, Dalmau J, Metz RJ, Kennedy DN, Pardo FS, Kutke S, Sorensen AG, Hochberg FH, Fishman AJ, Filipek PA, Rosen BR, Caviness VS, Mechtler LL, Withiam-Lench S, Shin K, Klnkel WR, Patel M, Truax B, Kinkel P, Shin K, Mechtler L, Ricci M, Pantano P, Maleci A, Pierallini S, Di Stefano D, Bozzao L, Cantore GP, Röhn G, Els T, Schröder R, Hoehn-Berlage M, Ernestus RI, Ruda R, Mocellini C, Soffietti R, Campana M, Ropolo R, Riva A, de Filippi PG, Schiffer D, Salgado D, Rodrigues M, Salgado L, Fonseca AT, Vieira MR, Bravo Marques JM, Satoh H, Uozumi T, Kiya K, Kurisu K, Arita K, Sumida M, Ikawa F, Tzuk-Shina T, Gomori JM, Rubinstein R, Lossos A, Siegal T, Vaalburg W, Paans AMJ, Willemsen ATM, van Waarde A, Pruim J, Visser GM, Go KG, Valentini S, Ting YLT, De Rose R, Chidichimo G, Corricro G, van Lcycn-Pilgram K, Erncslus RI, Klug N, van Leyen-Pilgram K, Ernestus RI, Schröder R, Klug N, Woydt M, Krone A, Tonn JC, Becker G, Neumann U, Roggendorf W, Roosen K, Plate KH, Breier G, Millaucr B, Weich HA, Ullrich A, Risau W, Roosen N, Chopra RK, Mikkelsen T, Rosenblum SD, Yan PS, Knight R, Windham J, Rosenblum ML, Schiffer D, Attanasio A, Cavalla P, Chio A, Giordana MT, Migheli A, Amberger V, Hensel T, Schwab ME, Cervoni L, Celli P, Tarantino R, Huettner C, Tonn JC, Berweiler U, Roggendorf W, Salmon I, Rorive S, Rombaut K, Pirotte B, Haot J, Brotchi J, Kiss R, Maugard-Louboutin C, Charrier J, Fayet G, Sagan C, Cuillioere P, Ricolleau G, Martin S, Menegalli-Bogeelli D, Lajat Y, Resche F, Molnàr P, Bárdos H, Ádány R, Rogers JP, Pilkington GJ, Pollo B, Giaccone G, Allegranza A, Bugiani O, Prim J, Badia J, Ribas E, Coello F, Shezen E, Lossos A, Abramsky O, Siegal T, Scerrati M, Roselli R, Iacoangeli M, Pompucci A, Rossi GF, Deeb SMA, Koreich O, Yaqub B, Moutaery KRA, Giordana MT, Cavalla P, Chio A, Marino S, Vigliani MC, Schiffer D, Deburghgraeve V, Darcel F, Gedouin D, Hassel MB, Guegan Y, Jeremic B, Grujicic D, Antunovic V, Matovic M, Shibamoto Y, Kallio M, Huhmar H, Kudoh C, Detta A, Sugiura K, Hitchcock ER, Mastrostefano R, Di Russo R, Cipriani§ M, Occhipinti EM, Conti EMS, Clowegeser A, Ortler M, Seiwald M, Kostron H, Rajan B, Ross G, Lim C, Ashlcy S, Goode D, Traish D, Brada M, Sanden GACV, Schouten LJ, Coebergh JWW, Razenberg PPA, Twijnstra A, Snilders-Keilholz A, Voormolen JHC, Hermans J, Leer JWH, Taillandier L, Baylac F, Dcbouvcrie M, Anxionnal R, Bracard S, Vignand JM, Duprcz A, Weber M, Winking M, Böker DK, Simmet T, Rothbart D, Strugar J, Balledux J, Criscuolo GR, Jachimczak P, Blesch A, Heβdörfer B, Bogdahn U, Ernestus RI, Schröder R, Klug N, Krouwer HGJ, Duinen SGV, Algra A, Zentner J, Wolf HK, Ostertun B, Hufnagel A, Campos MG, Solymosi L, Schramm J, Newlands ES, O'Reilly SM, Brampton M, Soffietti R, Chio A, Mocellini C, Ruda R, Vigliani MC, Schiffer D, Sciolla R, Seliak D, Henriksson R, Bergenheim AT, Björk P, Gunnarsson PO, Hariz M, Grant R, Collie D, Gregor A, Ebmeier KP, Jarvis G, Lander F, Cull A, Sellar R, Brada M, Thomas C, Elyan S, Hines F, Ashley S, Stenning S, Bernstein JJ, Goldberg WJ, Roelcke U, Von Ammon K, Hausmann O, Radu EW, Kaech D, Leenders KL, Fitzek MM, Aronen JE, Hochberg F, Gruber M, Schmidt E, Rosen B, Flschman A, Pardo P, Afra UMU, Sipos L, Slouik F, Boiardi A, Salmaggi A, Pozzi A, Farinotti L, Fariselli L, Silvani A, Brandes A, Scelzi E, Rigon A, Zampieri P, Pignataro M, Amanzo PD, Amista P, Rotilio A, Fiorentino MV, Thomas R, Brazil L, O'Connor AM, Ashley S, Brada M, Salvati M, Cervoni L, Puzzilli F, Cervoni L, Salvati M, Raguso M, Cruickshank GS, Duckworth R, Rumpling R, Rottuci M, Fariselli L, Boiardi A, Broggi G, Plrint NG, Sabattini E, Manetto V, Gambacorta H, Poggi S, Pileri S, Ferracini R, Grant R, Plev DV, Hopf NJ, Knosp E, Bohl J, Perncczky A, Kiss R, Salmon I, Catnby I, Dewitte O, Brotchi J, Pasteels JL, Camby I, Salmon I, Darro F, Danguy A, Brotchi J, Pasteels JL, Kiss R, Kiu MC, Lai GM, Yang TS, Ng KT, Chen JS, Chang CN, Leung WM, Ho YS, Rychter MD, Klimek A, Liberski PP, Karpinaka A, Krauseneck P, Schöffel V, Müller B, Kreth FW, Faist M, Warnke PC, Ostertag CB, Nielen KMBV, Visscr MC, Lebrun C, Lonjon M, Desjardin T, Michiels JF, Chanalet SLJL, Roche JL, Chatel M, Mastronardi L, Puzzilli F, Osman FJ, Lunardi P, Matsutani M, Ushio Y, Takakura K, Menten J, Hamers H, Ribot J, Dom R, Tcepen H, Müller B, Weidner N, Krauseneck P, Naujocks G, van Roost D, Wiestler OD, Kuncz A, Nieder C, Setzel-Sesterhein M, Niewald M, Schnabel I, O'Neill KS, Kitchen ND, Wilkins PR, Marsh HT, Pierce E, Doshi R, Deane R, Previtali S, Quattrini A, Nemni R, Ducati A, Wrabetz L, Canal N, Punt CJA, Stamatakis L, Giroux B, Rutten E, Quigley MR, Beth Sargent PAC, Flores N, Simon S, Maroon JC, Quigley MR, Beth Sargent PAC, Flores N, Maroon JC, Rocca AA, Gervasoni C, Castagna A, Picozzi P, Giugni E, Rocca AA, Tonnarelli GP, Ducati A, Mangili F, Truci G, Canal N, Giovanelli M, Roelcke U, Von Ammon K, Radu EW, Leenders KL, Sachsenheimer W, Bimmler T, Seiwald M, Eiter HRW, Ortler M, Obwegesser A, Kostron H, Steilen H, Henn W, Moringlane JR, Kolles H, Feiden W, Zang KD, Sleudel WI, Steinbrecher A, Schabet M, Heb C, Bamberg M, Dichgans J, Stragliotto G, Delattre JY, Poisson M, Zampieri P, Brandes A, Rigon A, Tosatto L, D'Amanzo P, Menicucci N, Rotilio A, Mingrino S, Steudel WI, Feld R, Henn W, Zang KD, Maire JP, Caudry M, Guerin J, Celerier D, Salem N, Demeaux H, Fahregat JF, Kusak ME, Bucno A, Albisua J, Jerez P, Sarasa JL, Garefa R, de Campos JM, Kusak ME, de Campos JM, Bueno A, García-Delgado R, Sarasa JL, García-Sola R, Lantsov AA, Shustova TI, Lcnartz D, Wellenreuther R, von Deirnling A, Köning W, Menzel J, Scarpa S, Manna A, Reale MG, Oppido PA, Carapella CM, Frati L, Valery CA, Ichen M, Foncin JP, Soubrane C, Khayat D, Philippon J, Vaz R, Cruz C, Weis S, Protopapa D, März R, Winkler PA, Reulen HJ, Bise K, Beuls E, Berg J, Deinsberger W, Böker DK, Samii M, Caudry M, Darrouzet V, Guérin J, Trouette R, Causse N, Bébéar JP, 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Abstracts. J Neurooncol 1994. [DOI: 10.1007/bf01070874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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