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Urrutia-Ruiz C, Rombach D, Cursano S, Gerlach-Arbeiter S, Schoen M, Bockmann J, Demestre M, Boeckers TM. Deletion of the Autism-Associated Protein SHANK3 Abolishes Structural Synaptic Plasticity after Brain Trauma. Int J Mol Sci 2022; 23:ijms23116081. [PMID: 35682760 PMCID: PMC9181590 DOI: 10.3390/ijms23116081] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 04/11/2022] [Revised: 05/26/2022] [Accepted: 05/27/2022] [Indexed: 12/14/2022] Open
Abstract
Autism spectrum disorders (ASDs) are characterized by repetitive behaviors and impairments of sociability and communication. About 1% of ASD cases are caused by mutations of SHANK3, a major scaffolding protein of the postsynaptic density. We studied the role of SHANK3 in plastic changes of excitatory synapses within the central nervous system by employing mild traumatic brain injury (mTBI) in WT and Shank3 knockout mice. In WT mice, mTBI triggered ipsi- and contralateral loss of hippocampal dendritic spines and excitatory synapses with a partial recovery over time. In contrast, no significant synaptic alterations were detected in Shank3∆11−/− mice, which showed fewer dendritic spines and excitatory synapses at baseline. In line, mTBI induced the upregulation of synaptic plasticity-related proteins Arc and p-cofilin only in WT mice. Interestingly, microglia proliferation was observed in WT mice after mTBI but not in Shank3∆11−/− mice. Finally, we detected TBI-induced increased fear memory at the behavioral level, whereas in Shank3∆11−/− animals, the already-enhanced fear memory levels increased only slightly after mTBI. Our data show the lack of structural synaptic plasticity in Shank3 knockout mice that might explain at least in part the rigidity of behaviors, problems in adjusting to new situations and cognitive deficits seen in ASDs.
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Affiliation(s)
- Carolina Urrutia-Ruiz
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Daniel Rombach
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Silvia Cursano
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Susanne Gerlach-Arbeiter
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Michael Schoen
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Juergen Bockmann
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Maria Demestre
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Tobias M. Boeckers
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Translational Biochemistry, 89081 Ulm, Germany
- Correspondence: ; Tel.: +49-731-5002-3220
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Lutz AK, Pérez Arévalo A, Ioannidis V, Stirmlinger N, Demestre M, Delorme R, Bourgeron T, Boeckers TM. SHANK2 Mutations Result in Dysregulation of the ERK1/2 Pathway in Human Induced Pluripotent Stem Cells-Derived Neurons and Shank2(-/-) Mice. Front Mol Neurosci 2021; 14:773571. [PMID: 34899182 PMCID: PMC8662699 DOI: 10.3389/fnmol.2021.773571] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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] [Received: 09/10/2021] [Accepted: 10/07/2021] [Indexed: 12/28/2022] Open
Abstract
SHANK2 (ProSAP1) is a postsynaptic scaffolding protein of excitatory synapses in the central nervous system and implicated in the development of autism spectrum disorders (ASD). Patients with mutations in SHANK2 show autism-like behaviors, developmental delay, and intellectual disability. We generated human induced pluripotent stem cells (hiPSC) from a patient carrying a heterozygous deletion of SHANK2 and from the unaffected parents. In patient hiPSCs and derived neurons SHANK2 mRNA and protein expression was reduced. During neuronal maturation, a reduction in growth cone size and a transient increase in neuronal soma size were observed. Neuronal proliferation was increased, and apoptosis was decreased in young and mature neurons. Additionally, mature patient hiPSC-derived neurons showed dysregulated excitatory signaling and a decrease of a broad range of signaling molecules of the ERK-MAP kinase pathway. These findings could be confirmed in brain samples from Shank2(−/−) mice, which also showed decreased mGluR5 and phospho-ERK1/2 expression. Our study broadens the current knowledge of SHANK2-related ASD. We highlight the importance of excitatory-inhibitory balance and mGluR5 dysregulation with disturbed downstream ERK1/2 signaling in ASD, which provides possible future therapeutic strategies for SHANK2-related ASD.
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Affiliation(s)
- Anne-Kathrin Lutz
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | | | | | | | - Maria Demestre
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | | | - Thomas Bourgeron
- Génétique Humaine et Fonctions Cognitives, Institut Pasteur, Université Paris Diderot, Paris, France
| | - Tobias M Boeckers
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany.,Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Ulm Site, Ulm, Germany
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3
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Lutz AK, Pfaender S, Incearap B, Ioannidis V, Ottonelli I, Föhr KJ, Cammerer J, Zoller M, Higelin J, Giona F, Stetter M, Stoecker N, Alami NO, Schön M, Orth M, Liebau S, Barbi G, Grabrucker AM, Delorme R, Fauler M, Mayer B, Jesse S, Roselli F, Ludolph AC, Bourgeron T, Verpelli C, Demestre M, Boeckers TM. Autism-associated SHANK3 mutations impair maturation of neuromuscular junctions and striated muscles. Sci Transl Med 2021; 12:12/547/eaaz3267. [PMID: 32522805 DOI: 10.1126/scitranslmed.aaz3267] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 12/09/2019] [Accepted: 04/07/2020] [Indexed: 12/12/2022]
Abstract
Heterozygous mutations of the gene encoding the postsynaptic protein SHANK3 are associated with syndromic forms of autism spectrum disorders (ASDs). One of the earliest clinical symptoms in SHANK3-associated ASD is neonatal skeletal muscle hypotonia. This symptom can be critical for the early diagnosis of affected children; however, the mechanism mediating hypotonia in ASD is not completely understood. Here, we used a combination of patient-derived human induced pluripotent stem cells (hiPSCs), Shank3Δ11(-/-) mice, and Phelan-McDermid syndrome (PMDS) muscle biopsies from patients of different ages to analyze the role of SHANK3 on motor unit development. Our results suggest that the hypotonia in SHANK3 deficiency might be caused by dysfunctions in all elements of the voluntary motor system: motoneurons, neuromuscular junctions (NMJs), and striated muscles. We found that SHANK3 localizes in Z-discs in the skeletal muscle sarcomere and co-immunoprecipitates with α-ACTININ. SHANK3 deficiency lead to shortened Z-discs and severe impairment of acetylcholine receptor clustering in hiPSC-derived myotubes and in muscle from Shank3Δ11(-/-) mice and patients with PMDS, indicating a crucial role for SHANK3 in the maturation of NMJs and striated muscle. Functional motor defects in Shank3Δ11(-/-) mice could be rescued with the troponin activator Tirasemtiv that sensitizes muscle fibers to calcium. Our observations give insight into the function of SHANK3 besides the central nervous system and imply potential treatment strategies for SHANK3-associated ASD.
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Affiliation(s)
- Anne-Kathrin Lutz
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Stefanie Pfaender
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Berra Incearap
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Valentin Ioannidis
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Ilaria Ottonelli
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Karl J Föhr
- Department of Anesthesiology, Ulm University Hospital, 89081 Ulm, Germany
| | - Judith Cammerer
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Marvin Zoller
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Julia Higelin
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Federica Giona
- CNR Neuroscience Institute, University of Milan, 20129 Milan, Italy.,BIOMETRA University of Milan, 20129 Milan, Italy
| | - Maximilian Stetter
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | - Nicole Stoecker
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | | | - Michael Schön
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany
| | | | - Stefan Liebau
- Institute of Neuroanatomy and Developmental Biology, Eberhard Karls University Tübingen, 72074 Tübingen, Germany
| | - Gotthold Barbi
- Institute for Human Genetics, Ulm University Hospital, 89081 Ulm, Germany
| | - Andreas M Grabrucker
- Cellular Neurobiology and Neuro-Nanotechnology Lab, Department of Biological Sciences, University of Limerick, V94PH61 Limerick, Ireland.,Bernal Institute, University of Limerick, V94T9PX Limerick, Ireland.,Health Research Institute (HRI), University of Limerick, V94T9PX Limerick, Ireland
| | - Richard Delorme
- Child and Adolescent Psychiatry Department, APHP, Robert-Debré Hospital, 750197 Paris, France
| | - Michael Fauler
- Institute of General Physiology, Ulm University, 89081 Ulm, Germany
| | - Benjamin Mayer
- Institute of Epidemiology and Medical Biometry, Ulm University, 89075 Ulm, Germany
| | | | | | | | - Thomas Bourgeron
- Génétique Humaine et Fonctions Cognitives, Université Paris Diderot, Institut Pasteur, 75015 Paris, France
| | - Chiara Verpelli
- CNR Neuroscience Institute, University of Milan, 20129 Milan, Italy.,BIOMETRA University of Milan, 20129 Milan, Italy
| | - Maria Demestre
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany.
| | - Tobias M Boeckers
- Institute for Anatomy and Cell Biology, Ulm University, 89081 Ulm, Germany. .,DZNE, Ulm Site, 89081 Ulm, Germany
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Freischmidt A, Goswami A, Limm K, Zimyanin VL, Demestre M, Glaß H, Holzmann K, Helferich AM, Brockmann SJ, Tripathi P, Yamoah A, Poser I, Oefner PJ, Böckers TM, Aronica E, Ludolph AC, Andersen PM, Hermann A, Weis J, Reinders J, Danzer KM, Weishaupt JH. A serum microRNA sequence reveals fragile X protein pathology in amyotrophic lateral sclerosis. Brain 2021; 144:1214-1229. [PMID: 33871026 PMCID: PMC8105042 DOI: 10.1093/brain/awab018] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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] [Received: 06/24/2019] [Revised: 10/19/2020] [Accepted: 11/11/2020] [Indexed: 12/14/2022] Open
Abstract
Knowledge about converging disease mechanisms in the heterogeneous syndrome amyotrophic lateral sclerosis (ALS) is rare, but may lead to therapies effective in most ALS cases. Previously, we identified serum microRNAs downregulated in familial ALS, the majority of sporadic ALS patients, but also in presymptomatic mutation carriers. A 5-nucleotide sequence motif (GDCGG; D = G, A or U) was strongly enriched in these ALS-related microRNAs. We hypothesized that deregulation of protein(s) binding predominantly to this consensus motif was responsible for the ALS-linked microRNA fingerprint. Using microRNA pull-down assays combined with mass spectrometry followed by extensive biochemical validation, all members of the fragile X protein family, FMR1, FXR1 and FXR2, were identified to directly and predominantly interact with GDCGG microRNAs through their structurally disordered RGG/RG domains. Preferential association of this protein family with ALS-related microRNAs was confirmed by in vitro binding studies on a transcriptome-wide scale. Immunohistochemistry of lumbar spinal cord revealed aberrant expression level and aggregation of FXR1 and FXR2 in C9orf72- and FUS-linked familial ALS, but also patients with sporadic ALS. Further analysis of ALS autopsies and induced pluripotent stem cell-derived motor neurons with FUS mutations showed co-aggregation of FXR1 with FUS. Hence, our translational approach was able to take advantage of blood microRNAs to reveal CNS pathology, and suggests an involvement of the fragile X-related proteins in familial and sporadic ALS already at a presymptomatic stage. The findings may uncover disease mechanisms relevant to many patients with ALS. They furthermore underscore the systemic, extra-CNS aspect of ALS.
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Affiliation(s)
- Axel Freischmidt
- Department of Neurology, Ulm University, Ulm, Germany.,German Center For Neurodegenerative Diseases (DZNE) Ulm, Ulm, Germany
| | - Anand Goswami
- Institute of Neuropathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Katharina Limm
- Institute of Functional Genomics, University of Regensburg, Regensburg, Germany
| | - Vitaly L Zimyanin
- Department of Neurology, Technical University Dresden, Dresden, Germany.,Department of Biology, University of Virginia, Charlottesville, VA, USA
| | - Maria Demestre
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Hannes Glaß
- Translational Neurodegeneration Section "Albrecht-Kossel", Department of Neurology, University Medical Center Rostock, University of Rostock, Rostock, Germany
| | | | | | | | - Priyanka Tripathi
- Institute of Neuropathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Alfred Yamoah
- Institute of Neuropathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Ina Poser
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Peter J Oefner
- Institute of Functional Genomics, University of Regensburg, Regensburg, Germany
| | - Tobias M Böckers
- German Center For Neurodegenerative Diseases (DZNE) Ulm, Ulm, Germany.,Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Eleonora Aronica
- Amsterdam UMC, University of Amsterdam, Department of (Neuro)Pathology, Amsterdam Neuroscience, Amsterdam, The Netherlands
| | - Albert C Ludolph
- Department of Neurology, Ulm University, Ulm, Germany.,German Center For Neurodegenerative Diseases (DZNE) Ulm, Ulm, Germany
| | - Peter M Andersen
- Department of Clinical Science, Neurosciences, Umeå University, Umeå, Sweden
| | - Andreas Hermann
- Department of Neurology, Technical University Dresden, Dresden, Germany.,Translational Neurodegeneration Section "Albrecht-Kossel", Department of Neurology, University Medical Center Rostock, University of Rostock, Rostock, Germany.,Center for Transdisciplinary Neurosciences Rostock (CTNR), University Medical Center Rostock, University of Rostock, Rostock, Germany.,German Center for Neurodegenerative Diseases (DZNE) Rostock/Greifswald, Rostock, Germany
| | - Joachim Weis
- Institute of Neuropathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Jörg Reinders
- Institute of Functional Genomics, University of Regensburg, Regensburg, Germany
| | | | - Jochen H Weishaupt
- Department of Neurology, Ulm University, Ulm, Germany.,Division for Neurodegenerative Diseases, Neurology Department, University Medicine Mannheim, Heidelberg University, Mannheim, Germany
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5
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Picchiarelli G, Demestre M, Zuko A, Been M, Higelin J, Dieterlé S, Goy MA, Mallik M, Sellier C, Scekic-Zahirovic J, Zhang L, Rosenbohm A, Sijlmans C, Aly A, Mersmann S, Sanjuan-Ruiz I, Hübers A, Messaddeq N, Wagner M, van Bakel N, Boutillier AL, Ludolph A, Lagier-Tourenne C, Boeckers TM, Dupuis L, Storkebaum E. FUS-mediated regulation of acetylcholine receptor transcription at neuromuscular junctions is compromised in amyotrophic lateral sclerosis. Nat Neurosci 2019; 22:1793-1805. [PMID: 31591561 PMCID: PMC6858880 DOI: 10.1038/s41593-019-0498-9] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [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: 05/17/2019] [Accepted: 08/15/2019] [Indexed: 12/13/2022]
Abstract
Neuromuscular junction (NMJ) disruption is an early pathogenic event in amyotrophic lateral sclerosis (ALS). Yet, direct links between NMJ pathways and ALS-associated genes such as FUS, whose heterozygous mutations cause aggressive forms of ALS, remain elusive. In a knock-in Fus-ALS mouse model, we identified postsynaptic NMJ defects in newborn homozygous mutants, attributable to mutant FUS toxicity in skeletal muscle. Adult heterozygous knock-in mice displayed smaller neuromuscular endplates that denervated before motor neuron loss, consistent with ‘dying-back’ neuronopathy. FUS was enriched in subsynaptic myonuclei, and this innervation-dependent enrichment was distorted in FUS-ALS. Mechanistically, FUS collaborates with the ETS-transcription factor ERM to stimulate transcription of acetylcholine receptor (AchR) genes. FUS-ALS patient iPSC-derived motor neuron-myotube co-cultures revealed endplate maturation defects due to intrinsic FUS toxicity in both motor neurons and myotubes. Thus, FUS regulates AChR gene expression in subsynaptic myonuclei and muscle-intrinsic toxicity of ALS-mutant FUS may contribute to dying-back motor neuronopathy.
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Affiliation(s)
| | - Maria Demestre
- Institute of Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Amila Zuko
- Department of Molecular Neurobiology, Donders Institute for Brain, Cognition and Behaviour and Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Marije Been
- Department of Molecular Neurobiology, Donders Institute for Brain, Cognition and Behaviour and Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Julia Higelin
- Institute of Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | | | | | - Moushami Mallik
- Department of Molecular Neurobiology, Donders Institute for Brain, Cognition and Behaviour and Faculty of Science, Radboud University, Nijmegen, The Netherlands.,Molecular Neurogenetics Laboratory, Max Planck Institute for Molecular Biomedicine, Muenster, Germany.,Faculty of Medicine, University of Muenster, Muenster, Germany
| | - Chantal Sellier
- IGBMC, INSERM U964, CNRS UMR7104, University of Strasbourg, Illkirch, France
| | | | - Li Zhang
- Molecular Neurogenetics Laboratory, Max Planck Institute for Molecular Biomedicine, Muenster, Germany.,Faculty of Medicine, University of Muenster, Muenster, Germany
| | | | - Céline Sijlmans
- Department of Molecular Neurobiology, Donders Institute for Brain, Cognition and Behaviour and Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Amr Aly
- Institute of Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Sina Mersmann
- Molecular Neurogenetics Laboratory, Max Planck Institute for Molecular Biomedicine, Muenster, Germany.,Faculty of Medicine, University of Muenster, Muenster, Germany
| | | | | | - Nadia Messaddeq
- IGBMC, INSERM U964, CNRS UMR7104, University of Strasbourg, Illkirch, France
| | - Marina Wagner
- Molecular Neurogenetics Laboratory, Max Planck Institute for Molecular Biomedicine, Muenster, Germany.,Faculty of Medicine, University of Muenster, Muenster, Germany
| | - Nick van Bakel
- Department of Molecular Neurobiology, Donders Institute for Brain, Cognition and Behaviour and Faculty of Science, Radboud University, Nijmegen, The Netherlands
| | - Anne-Laurence Boutillier
- Laboratoire de Neurosciences Cognitives et Adaptatives, Université de Strasbourg, Centre National de la Recherche Scientifique, UMR 7364, Strasbourg, France
| | - Albert Ludolph
- Department of Neurology, Oberer Eselsberg 45, Ulm, Germany
| | - Clotilde Lagier-Tourenne
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.,Broad Institute of Harvard University and MIT, Cambridge, MA, USA
| | - Tobias M Boeckers
- Institute of Anatomy and Cell Biology, Ulm University, Ulm, Germany. .,DZNE, Ulm site, Ulm, Germany.
| | - Luc Dupuis
- Université de Strasbourg, INSERM, UMR-S1118, Strasbourg, France.
| | - Erik Storkebaum
- Department of Molecular Neurobiology, Donders Institute for Brain, Cognition and Behaviour and Faculty of Science, Radboud University, Nijmegen, The Netherlands. .,Molecular Neurogenetics Laboratory, Max Planck Institute for Molecular Biomedicine, Muenster, Germany. .,Faculty of Medicine, University of Muenster, Muenster, Germany.
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6
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Deshpande D, Higelin J, Schoen M, Vomhof T, Boeckers TM, Demestre M, Michaelis J. Synaptic FUS Localization During Motoneuron Development and Its Accumulation in Human ALS Synapses. Front Cell Neurosci 2019; 13:256. [PMID: 31244613 PMCID: PMC6582137 DOI: 10.3389/fncel.2019.00256] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [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] [Received: 01/30/2019] [Accepted: 05/23/2019] [Indexed: 12/21/2022] Open
Abstract
Mutations in the fused in Sarcoma (FUS) gene induce cytoplasmic FUS aggregations, contributing to the neurodegenerative disease amyotrophic lateral sclerosis (ALS) in certain cases. While FUS is mainly a nuclear protein involved in transcriptional processes with limited cytoplasmic functions, it shows an additional somatodendritic localization in neurons. In this study we analyzed the localization of FUS in motoneuron synapses, these being the most affected neurons in ALS, using super-resolution microscopy to distinguish between the pre- and postsynaptic compartments. We report a maturation-based variation of FUS localization in rodent synapses where a predominantly postsynaptic FUS was observed in the early stages of synaptic development, while in mature synapses the protein was entirely localized in the axonal terminal. Likewise, we also show that at the synapse of human motoneurons derived from induced pluripotent stem cells of a healthy control, FUS is mainly postsynaptic in the early developmental stages. In motoneurons derived from ALS patients harboring a very aggressive juvenile FUS mutation, increased synaptic accumulation of mutated FUS was observed. Moreover increased aggregation of other synaptic proteins Bassoon and Homer1 was also detected in these abnormal synapses. Having demonstrated changes in the FUS localization during synaptogenesis, a role of synaptic FUS in both dendritic and axonal cellular compartments is probable, and we propose a gain-of-toxic function due to the synaptic aggregation of mutant FUS in ALS.
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Affiliation(s)
| | - Julia Higelin
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Michael Schoen
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Thomas Vomhof
- Institute of Biophysics, Ulm University, Ulm, Germany
| | - Tobias M Boeckers
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany.,German Center for Neurodegenerative Diseases (DZNE), Ulm Site, Ulm, Germany
| | - Maria Demestre
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
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7
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Catanese A, Olde Heuvel F, Mulaw M, Demestre M, Higelin J, Barbi G, Freischmidt A, Weishaupt JH, Ludolph AC, Roselli F, Boeckers TM. Retinoic acid worsens ATG10-dependent autophagy impairment in TBK1-mutant hiPSC-derived motoneurons through SQSTM1/p62 accumulation. Autophagy 2019; 15:1719-1737. [PMID: 30939964 DOI: 10.1080/15548627.2019.1589257] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Mutations in the TBK1 (TANK binding kinase 1) gene are causally linked to amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). TBK1 phosphorylates the cargo receptors OPTN and SQSTM1 regulating a critical step in macroautophagy/autophagy. Disruption of the autophagic flux leads to accumulation of cytosolic protein aggregates, which are a hallmark of ALS. hiPSC-derived TBK1-mutant motoneurons (MNs) showed reduced TBK1 levels and accumulation of cytosolic SQSTM1-positive aggresomes. By screening a library of nuclear-receptor-agonists for modifiers of the SQSTM1 aggregates, we identified 4-hydroxy(phenyl)retinamide (4HPR) as a potent modifier exerting detrimental effects on mutant-TBK1 motoneurons fitness exacerbating the autophagy overload. We have shown by TEM that TBK1-mutant motoneurons accumulate immature phagophores due a failure in the elongation phase, and 4HPR further worsens the burden of dysfunctional phagophores. 4HPR-increased toxicity was associated with the upregulation of SQSTM1 in a context of strongly reduced ATG10, while rescue of ATG10 levels abolished 4HPR toxicity. Finally, we showed that 4HPR leads to a downregulation of ATG10 and to an accumulation of SQSTM1+ aggresomes also in hiPSC-derived C9orf72-mutant motoneurons. Our data show that cultured human motoneurons harboring mutations in TBK1 gene display typical ALS features, like decreased viability and accumulation of cytosolic SQSTM1-positive aggresomes. The retinoid 4HPR appears a strong negative modifier of the fitness of TBK1 and C9orf72-mutant MNs, through a pathway converging on the mismatch of initiated autophagy and ATG10 levels. Thus, autophagy induction appears not to be a therapeutic strategy for ALS unless the specific underlying pathway alterations are properly addressed. Abbreviations: 4HPR: 4-hydroxy(phenyl)retinamide; AKT: AKT1 serine/threonine kinase 1; ALS: amyotrophic lateral sclerosis; ATG: autophagy related; AVs: autophagic vesicle; C9orf72: chromosome 9 open reading frame 72; CASP3: caspase 3; CHAT: choline O-acetyltransferase; CYCS: cytochrome c, somatic; DIV: day in vitro; FTD: frontotemporal dementia; FUS: FUS RNA binding protein; GFP: green fluorescent protein; hiPSCs: human induced pluripotent stem cells; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; MNs: motoneurons; mRFP: monomeric red fluorescent protein; MTOR: mechanistic target of rapamycin kinase; NFE2L2/NRF2: nuclear factor, erythroid 2 like 2; RARA: retinoic acid receptor alpha; SLC18A3/VACHT: solute carrier family 18 (vesicular acetylcholine transporter), member 3; SQSTM1/p62: sequestosome 1; TBK1: TANK binding kinase 1; TEM: transmission electron microscopy.
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Affiliation(s)
- Alberto Catanese
- Institute of Anatomy and Cell Biology, Ulm University , Ulm , DE , Germany.,International Graduate School, Ulm University , Ulm , DE , Germany
| | | | - Medhanie Mulaw
- Institute of Experimental Tumor Research, Ulm University , Ulm , DE , Germany
| | - Maria Demestre
- Institute of Anatomy and Cell Biology, Ulm University , Ulm , DE , Germany
| | - Julia Higelin
- Institute of Anatomy and Cell Biology, Ulm University , Ulm , DE , Germany.,International Graduate School, Ulm University , Ulm , DE , Germany
| | - Gotthold Barbi
- Institute for Human Genetics, Ulm University , Ulm , DE , Germany
| | | | | | | | - Francesco Roselli
- Institute of Anatomy and Cell Biology, Ulm University , Ulm , DE , Germany.,Deptartment of Neurology, Ulm University , Ulm , DE , Germany
| | - Tobias M Boeckers
- Institute of Anatomy and Cell Biology, Ulm University , Ulm , DE , Germany
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8
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Higelin J, Catanese A, Semelink-Sedlacek LL, Oeztuerk S, Lutz AK, Bausinger J, Barbi G, Speit G, Andersen PM, Ludolph AC, Demestre M, Boeckers TM. NEK1 loss-of-function mutation induces DNA damage accumulation in ALS patient-derived motoneurons. Stem Cell Res 2018; 30:150-162. [PMID: 29929116 DOI: 10.1016/j.scr.2018.06.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 05/22/2018] [Accepted: 06/07/2018] [Indexed: 10/14/2022] Open
Abstract
Mutations in genes coding for proteins involved in DNA damage response (DDR) and repair, such as C9orf72 and FUS (Fused in Sarcoma), are associated with neurodegenerative diseases and lead to amyotrophic lateral sclerosis (ALS). Heterozygous loss-of-function mutations in NEK1 (NIMA-related kinase 1) have also been recently found to cause ALS. NEK1 codes for a multifunctional protein, crucially involved in mitotic checkpoint control and DDR. To resolve pathological alterations associated with NEK1 mutation, we compared hiPSC-derived motoneurons carrying a NEK1 mutation with mutant C9orf72 and wild type neurons at basal level and after DNA damage induction. Motoneurons carrying a C9orf72 mutation exhibited cell specific signs of increased DNA damage. This phenotype was even more severe in NEK1c.2434A>T neurons that showed significantly increased DNA damage at basal level and impaired DDR after induction of DNA damage in an maturation-dependent manner. Our results provide first mechanistic insight in pathophysiological alterations induced by NEK1 mutations and point to a converging pathomechanism of different gene mutations causative for ALS. Therefore, our study contributes to the development of novel therapeutic strategies to reduce DNA damage accumulation in neurodegenerative diseases and ALS.
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Affiliation(s)
- Julia Higelin
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany; International Graduate School in Molecular Medicine, Ulm University, Ulm, Germany
| | - Alberto Catanese
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany; International Graduate School in Molecular Medicine, Ulm University, Ulm, Germany
| | | | - Sertap Oeztuerk
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Anne-Kathrin Lutz
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany; International Graduate School in Molecular Medicine, Ulm University, Ulm, Germany
| | | | - Gotthold Barbi
- Institute for Human Genetics, University Ulm, Ulm, Germany
| | - Günter Speit
- Institute for Human Genetics, University Ulm, Ulm, Germany
| | - Peter M Andersen
- Department of Pharmacology and Clinical Neuroscience, Umea University, Umea, Sweden
| | | | - Maria Demestre
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany.
| | - Tobias M Boeckers
- Institute for Anatomy and Cell Biology, Ulm University, Ulm, Germany.
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9
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Higelin J, Demestre M, Putz S, Delling JP, Jacob C, Lutz AK, Bausinger J, Huber AK, Klingenstein M, Barbi G, Speit G, Huebers A, Weishaupt JH, Hermann A, Liebau S, Ludolph AC, Boeckers TM. FUS Mislocalization and Vulnerability to DNA Damage in ALS Patients Derived hiPSCs and Aging Motoneurons. Front Cell Neurosci 2016; 10:290. [PMID: 28082870 PMCID: PMC5183648 DOI: 10.3389/fncel.2016.00290] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [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] [Received: 08/18/2016] [Accepted: 12/02/2016] [Indexed: 12/14/2022] Open
Abstract
Mutations within the FUS gene (Fused in Sarcoma) are known to cause Amyotrophic Lateral Sclerosis (ALS), a neurodegenerative disease affecting upper and lower motoneurons. The FUS gene codes for a multifunctional RNA/DNA-binding protein that is primarily localized in the nucleus and is involved in cellular processes such as splicing, translation, mRNA transport and DNA damage response. In this study, we analyzed pathophysiological alterations associated with ALS related FUS mutations (mFUS) in human induced pluripotent stem cells (hiPSCs) and hiPSC derived motoneurons. To that end, we compared cells carrying a mild or severe mFUS in physiological- and/or stress conditions as well as after induced DNA damage. Following hyperosmolar stress or irradiation, mFUS hiPS cells recruited significantly more cytoplasmatic FUS into stress granules accompanied by impaired DNA-damage repair. In motoneurons wild-type FUS was localized in the nucleus but also deposited as small punctae within neurites. In motoneurons expressing mFUS the protein was additionally detected in the cytoplasm and a significantly increased number of large, densely packed FUS positive stress granules were seen along neurites. The amount of FUS mislocalization correlated positively with both the onset of the human disease (the earlier the onset the higher the FUS mislocalization) and the maturation status of the motoneurons. Moreover, even in non-stressed post-mitotic mFUS motoneurons clear signs of DNA-damage could be detected. In summary, we found that the susceptibility to cell stress was higher in mFUS hiPSCs and hiPSC derived motoneurons than in controls and the degree of FUS mislocalization correlated well with the clinical severity of the underlying ALS related mFUS. The accumulation of DNA damage and the cellular response to DNA damage stressors was more pronounced in post-mitotic mFUS motoneurons than in dividing hiPSCs suggesting that mFUS motoneurons accumulate foci of DNA damage, which in turn might be directly linked to neurodegeneration.
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Affiliation(s)
- Julia Higelin
- Institute for Anatomy and Cell Biology, Ulm University Ulm, Germany
| | - Maria Demestre
- Institute for Anatomy and Cell Biology, Ulm University Ulm, Germany
| | - Stefan Putz
- Institute for Anatomy and Cell Biology, Ulm UniversityUlm, Germany; Department of Neurology, Ulm UniversityUlm, Germany
| | - Jan P Delling
- Institute for Anatomy and Cell Biology, Ulm University Ulm, Germany
| | - Christian Jacob
- Institute for Anatomy and Cell Biology, Ulm University Ulm, Germany
| | | | | | | | - Moritz Klingenstein
- Institute of Neuroanatomy, Eberhard Karls University of Tübingen Tübingen, Germany
| | - Gotthold Barbi
- Institute for Human Genetics, Ulm University Ulm, Germany
| | - Günter Speit
- Institute for Human Genetics, Ulm University Ulm, Germany
| | | | | | - Andreas Hermann
- Department of Neurology, Technische Universität DresdenDresden, Germany; German Center for Neurodegenerative DiseasesDresden, Germany; Center for Regenerative Therapies Dresden, Technische Universität DresdenDresden, Germany
| | - Stefan Liebau
- Institute of Neuroanatomy, Eberhard Karls University of Tübingen Tübingen, Germany
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10
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Naujock M, Stanslowsky N, Bufler S, Naumann M, Reinhardt P, Sterneckert J, Kefalakes E, Kassebaum C, Bursch F, Lojewski X, Storch A, Frickenhaus M, Boeckers TM, Putz S, Demestre M, Liebau S, Klingenstein M, Ludolph AC, Dengler R, Kim KS, Hermann A, Wegner F, Petri S. 4-Aminopyridine Induced Activity Rescues Hypoexcitable Motor Neurons from Amyotrophic Lateral Sclerosis Patient-Derived Induced Pluripotent Stem Cells. Stem Cells 2016; 34:1563-75. [PMID: 26946488 DOI: 10.1002/stem.2354] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 02/11/2016] [Indexed: 12/13/2022]
Abstract
Despite decades of research on amyotrophic lateral sclerosis (ALS), there is only one approved drug, which minimally extends patient survival. Here, we investigated pathophysiological mechanisms underlying ALS using motor neurons (MNs) differentiated from induced pluripotent stem cells (iPSCs) derived from ALS patients carrying mutations in FUS or SOD1. Patient-derived MNs were less active and excitable compared to healthy controls, due to reduced Na(+) /K(+) ratios in both ALS groups accompanied by elevated potassium channel (FUS) and attenuated sodium channel expression levels (FUS, SOD1). ALS iPSC-derived MNs showed elevated endoplasmic reticulum stress (ER) levels and increased caspase activation. Treatment with the FDA approved drug 4-Aminopyridine (4AP) restored ion-channel imbalances, increased neuronal activity levels and decreased ER stress and caspase activation. This study provides novel pathophysiological data, including a mechanistic explanation for the observed hypoexcitability in patient-derived MNs and a new therapeutic strategy to provide neuroprotection in MNs affected by ALS. Stem Cells 2016;34:1563-1575.
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Affiliation(s)
- Maximilian Naujock
- Department of Neurology, Hannover Medical School, Hannover, Germany.,Molecular Neurobiology Laboratory, McLean Hospital/Harvard Medical School, Belmont, Massachusetts, USA
| | | | - Sebastian Bufler
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Marcel Naumann
- Division for Neurodegenerative Diseases, Department of Neurology, Dresden University of Technology, Dresden, Germany
| | - Peter Reinhardt
- DFG Research Center for Regenerative Therapies (CRTD), Technische Universität Dresden, Dresden, Germany
| | - Jared Sterneckert
- DFG Research Center for Regenerative Therapies (CRTD), Technische Universität Dresden, Dresden, Germany
| | | | - Carola Kassebaum
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Franziska Bursch
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Xenia Lojewski
- Division for Neurodegenerative Diseases, Department of Neurology, Dresden University of Technology, Dresden, Germany
| | - Alexander Storch
- Division for Neurodegenerative Diseases, Department of Neurology, Dresden University of Technology, Dresden, Germany.,DFG Research Center for Regenerative Therapies (CRTD), Technische Universität Dresden, Dresden, Germany.,German Center for Neurodegenerative Diseases (DZNE), Dresden, Germany.,Department of Neurology, University of Rostock, Rostock, Germany
| | | | | | - Stefan Putz
- Institute of Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Maria Demestre
- Institute of Anatomy and Cell Biology, Ulm University, Ulm, Germany
| | - Stefan Liebau
- Institute of Neuroanatomy, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Moritz Klingenstein
- Institute of Neuroanatomy, Eberhard Karls University Tübingen, Tübingen, Germany
| | | | - Reinhard Dengler
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Kwang-Soo Kim
- Molecular Neurobiology Laboratory, McLean Hospital/Harvard Medical School, Belmont, Massachusetts, USA
| | - Andreas Hermann
- Division for Neurodegenerative Diseases, Department of Neurology, Dresden University of Technology, Dresden, Germany.,German Center for Neurodegenerative Diseases (DZNE), Dresden, Germany
| | - Florian Wegner
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Susanne Petri
- Department of Neurology, Hannover Medical School, Hannover, Germany
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11
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Schoen M, Reichel JM, Demestre M, Putz S, Deshpande D, Proepper C, Liebau S, Schmeisser MJ, Ludolph AC, Michaelis J, Boeckers TM. Super-Resolution Microscopy Reveals Presynaptic Localization of the ALS/FTD Related Protein FUS in Hippocampal Neurons. Front Cell Neurosci 2016; 9:496. [PMID: 26834559 PMCID: PMC4709451 DOI: 10.3389/fncel.2015.00496] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [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] [Received: 10/09/2015] [Accepted: 12/09/2015] [Indexed: 12/12/2022] Open
Abstract
Fused in Sarcoma (FUS) is a multifunctional RNA-/DNA-binding protein, which is involved in the pathogenesis of the neurodegenerative disorders amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). A common hallmark of these disorders is the abnormal accumulation of mutated FUS protein in the cytoplasm. Under normal conditions FUS is confined to the nuclear compartment, in neurons, however, additional somatodendritic localization can be observed. In this study, we carefully analyzed the subcellular localization of endogenous FUS at synaptic sites of hippocampal neurons which are among the most affected cell types in FTD with FUS pathology. We could confirm a strong nuclear localization of FUS as well as its prominent and widespread neuronal expression throughout the adult and developing rat brain, particularly in the hippocampus, the cerebellum and the outer layers of the cortex. Intriguingly, FUS was also consistently observed at synaptic sites as detected by neuronal subcellular fractionation as well as by immunolabeling. To define a pre- and/or postsynaptic localization of FUS, we employed super-resolution fluorescence localization microscopy. FUS was found to be localized within the axon terminal in close proximity to the presynaptic vesicle protein Synaptophysin1 and adjacent to the active zone protein Bassoon, but well separated from the postsynaptic protein PSD-95. Having shown the presynaptic localization of FUS in the nervous system, a novel extranuclear role of FUS at neuronal contact sites has to be considered. Since there is growing evidence that local presynaptic translation might also be an important mechanism for plasticity, FUS - like the fragile X mental retardation protein FMRP - might act as one of the presynaptic RNA-binding proteins regulating this machinery. Our observation of presynaptic FUS should foster further investigations to determine its role in neurodegenerative diseases such as ALS and FTD.
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Affiliation(s)
- Michael Schoen
- Institute for Anatomy and Cell Biology, Ulm University Ulm, Germany
| | | | - Maria Demestre
- Institute for Anatomy and Cell Biology, Ulm University Ulm, Germany
| | - Stefan Putz
- Institute for Anatomy and Cell Biology, Ulm UniversityUlm, Germany; Department of Neurology, Ulm UniversityUlm, Germany
| | | | | | - Stefan Liebau
- Institute of Neuroanatomy, Eberhard Karls University Tübingen Tübingen, Germany
| | - Michael J Schmeisser
- Institute for Anatomy and Cell Biology, Ulm UniversityUlm, Germany; Department of Neurology, Ulm UniversityUlm, Germany
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12
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Demestre M, Orth M, Föhr KJ, Achberger K, Ludolph AC, Liebau S, Boeckers TM. Formation and characterisation of neuromuscular junctions between hiPSC derived motoneurons and myotubes. Stem Cell Res 2015; 15:328-36. [PMID: 26255853 DOI: 10.1016/j.scr.2015.07.005] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 07/21/2015] [Accepted: 07/21/2015] [Indexed: 12/16/2022] Open
Abstract
Striated skeletal muscle cells from humans represent a valuable source for in vitro studies of the motoric system as well as for pathophysiological investigations in the clinical settings. Myoblasts can readily be grown from human muscle tissue. However, if muscle tissue is unavailable, myogenic cells can be generated from human induced pluripotent stem cells (hiPSCs) preferably without genetic engineering. Our study aimed to optimize the generation of hiPSCs derived myogenic cells by employing selection of CD34 positive cells and followed by distinct, stepwise culture conditions. Following the expansion of CD34 positive single cells under myogenic cell culture conditions, serum deprived myoblast-like cells finally fused and formed multinucleated striated myotubes that expressed a set of key markers for muscle differentiation. In addition, these myotubes contracted upon electrical stimulation, responded to acetylcholine (Ach) and were able to generate action potentials. Finally, we co-cultured motoneurons and myotubes generated from identical hiPSCs cell lines. We could observe the early aggregation of acetylcholine receptors in muscle cells of immature co-cultures. At later stages, we identified and characterised mature neuromuscular junctions (NMJs). In summary, we describe here the successful generation of an iPS cell derived functional cellular system consisting of two distinct communicating cells types. This in vitro co-culture system could therefore contribute to research on diseases in which the motoneurons and the NMJ are predominantly affected, such as in amyotrophic lateral sclerosis or spinal muscular atrophy.
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Affiliation(s)
- M Demestre
- Institute of Anatomy and Cell Biology, Ulm University, Germany.
| | - M Orth
- Department of Neurology, Ulm University, Germany
| | - K J Föhr
- Clinic for Anaesthesiology, Ulm University, Germany
| | - K Achberger
- Institute of Neuroanatomy, Eberhard Karls University, Tübingen, Germany
| | - A C Ludolph
- Department of Neurology, Ulm University, Germany
| | - S Liebau
- Institute of Neuroanatomy, Eberhard Karls University, Tübingen, Germany
| | - T M Boeckers
- Institute of Anatomy and Cell Biology, Ulm University, Germany.
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13
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Demestre M, Terzi MY, Mautner V, Vajkoczy P, Kurtz A, Piña AL. Effects of pigment epithelium derived factor (PEDF) on malignant peripheral nerve sheath tumours (MPNSTs). J Neurooncol 2014; 115:391-9. [PMID: 24078214 DOI: 10.1007/s11060-013-1252-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2013] [Accepted: 09/17/2013] [Indexed: 11/30/2022]
Abstract
Neurofibromatosis type 1 (NF1) is an inherited genetic disease affecting 1 in 3,500 individuals. A prominent feature of NF1 is the formation of benign tumours of the peripheral nerve sheath (neurofibromas). However, these can become malignant and form highly metastatic malignant peripheral nerve sheath tumours (MPNST), which are usually fatal despite aggressive surgery, chemotherapy, and radiotherapy. Recent studies have shown that pigment epithelium-derived factor (PEDF) can induce differentiation and inhibit angiogenesis in several kinds of tumours. The present study was designed to determine the in vitro and in vivo effects of PEDF on MPNST angiogenesis and tumour growth. PEDF inhibited proliferation and augmented apoptosis in S462 MPNST cells after 48 h of treatment in culture. In xenografts of S462 MPNST cells in athymic nude mice, PEDF suppressed MPNST tumour burden, due mainly to inhibition of angiogenesis. These results demonstrate for the first time inhibitory effects of PEDF on the growth of human MPNST via induction of anti-angiogenesis and apoptosis. Our results suggest that PEDF could be a novel approach for future therapeutic purposes against MPNST.
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14
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Gleiss J, Demestre M, Spyra M, Eschenhagen T, Hagel C, Mautner VF, Kluwe L, Friedrich RE. B-scan ultrasonographic monitoring of orthotopic xenografted plexiform neurofibroma in mice. In Vivo 2013; 27:723-727. [PMID: 24292574] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND/AIM Xenografted benign tumours in immunodeficient mice provide an in vivo model to study tumour biology and the effect of agents on tumour growth. Conventionally, these small grafts can only be monitored upon sacrificing the animals. We evaluated ultrasound biomicroscopy for monitoring such grafts in vivo. MATERIALS AND METHODS Small fragments (<10 mm(3)) of a plexiform neurofibroma obtained from patients with established diagnosis of neurofibromatosis type-1 (NF1) were orthotopically-xenografted onto the sciatic nerve of immunodeficient mice and monitored using a high-resolution in vivo micro-imaging system. RESULTS Grafts were identified in most cases and were distinguished from the surrounding inflammatory host tissues by detailed ultrasonographic signals. Graft sizes could be calculated precisely from serial scan sections and monitored during the whole course of drug treatment. CONCLUSION High frequency sonographic measurement is a superior non-invasive method for monitoring small grafts of slowly growing benign tumours in mice in vivo, e.g. plexiform neurofibroma, and is especially suitable for tracing the effects of drugs at multiple time-points, thus allowing a very cost-effective follow-up.
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Affiliation(s)
- Jacob Gleiss
- DMD, Building O-10, Department of Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany.
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15
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Reitz M, Demestre M, Sedlacik J, Meissner H, Fiehler J, Kim SU, Westphal M, Schmidt NO. Intranasal delivery of neural stem/progenitor cells: a noninvasive passage to target intracerebral glioma. Stem Cells Transl Med 2012; 1:866-73. [PMID: 23283548 DOI: 10.5966/sctm.2012-0045] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [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: 12/17/2022] Open
Abstract
Stem cell-based therapies for neurological disorders, including brain tumors, advance continuously toward clinical trials. Optimized cell delivery to the central nervous system remains a challenge since direct intracerebral injection is an invasive method with low transplantation efficiency. We investigated the feasibility of intranasal administration of neural stem/progenitor cells (NSPCs) as an alternative, noninvasive, and direct passage for the delivery of stem cells to target malignant gliomas. Tumor-targeting and migratory pathways of murine and human NSPCs were investigated by intravital magnetic resonance imaging and in histological time course analyses in the intracerebral U87, NCE-G55T2, and syngenic Gl261 glioblastoma models. Intranasally administered NSPCs displayed a rapid, targeted tumor tropism with significant numbers of NSPCs accumulating specifically at the intracerebral glioma site within 6 hours after intranasal delivery. Histological time series analysis revealed that NSPCs migrated within the first 24 hours mainly via olfactory pathways but also by systemic distribution via the microvasculature of the nasal mucosa. Intranasal application of NSPCs leads to a rapid, targeted migration of cells toward intracerebral gliomas. The directional distribution of cells accumulating intra- and peritumorally makes the intranasal delivery of NSPCs a promising noninvasive and convenient alternative delivery method for the treatment of malignant gliomas with the possibility of multiple dosing regimens.
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Affiliation(s)
- Matthias Reitz
- Department of Neurosurgery, Medical Center, Eppendorf, Hamburg, Germany
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16
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Spyra M, Kluwe L, Hagel C, Nguyen R, Panse J, Kurtz A, Mautner VF, Rabkin SD, Demestre M. Cancer stem cell-like cells derived from malignant peripheral nerve sheath tumors. PLoS One 2011; 6:e21099. [PMID: 21695156 PMCID: PMC3113907 DOI: 10.1371/journal.pone.0021099] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [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: 12/22/2010] [Accepted: 05/20/2011] [Indexed: 12/25/2022] Open
Abstract
This study aims to examine whether or not cancer stem cells exist in malignant peripheral nerve sheath tumors (MPNST). Cells of established lines, primary cultures and freshly dissected tumors were cultured in serum free conditions supplemented with epidermal and fibroblast growth factors. From one established human MPNST cell line, S462, cells meeting the criteria for cancer stem cells were isolated. Clonal spheres were obtained, which could be passaged multiple times. Enrichment of stem cell-like cells in these spheres was also supported by increased expression of stem cell markers such as CD133, Oct4, Nestin and NGFR, and decreased expression of mature cell markers such as CD90 and NCAM. Furthermore, cells of these clonal S462 spheres differentiated into Schwann cells, smooth muscle/fibroblast and neurons-like cells under specific differentiation-inducing cultural conditions. Finally, subcutaneous injection of the spheres into immunodeficient nude mice led to tumor formation at a higher rate compared to the parental adherent cells (66% versus 10% at 2.5×105). These results provide evidence for the existence of cancer stem cell-like cells in malignant peripheral nerve sheath tumors.
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Affiliation(s)
- Melanie Spyra
- Department of Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lan Kluwe
- Department of Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christian Hagel
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rosa Nguyen
- Department of Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jens Panse
- Department of Oncology and Hematology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Andreas Kurtz
- Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Berlin, Germany
- College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- * E-mail: ,
| | - Victor Felix Mautner
- Department of Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Samuel David Rabkin
- Department of Neurosurgery, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Maria Demestre
- Department of Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- * E-mail: ,
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17
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Demestre M, Herzberg J, Holtkamp N, Hagel C, Reuss D, Friedrich RE, Kluwe L, Von Deimling A, Mautner VF, Kurtz A. Imatinib mesylate (Glivec) inhibits Schwann cell viability and reduces the size of human plexiform neurofibroma in a xenograft model. J Neurooncol 2009; 98:11-9. [PMID: 19921098 DOI: 10.1007/s11060-009-0049-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Accepted: 10/26/2009] [Indexed: 01/13/2023]
Abstract
Plexiform neurofibromas (PNF), one of the major features of neurofibromatosis type 1 (NF1), are characterized by complex cellular composition and mostly slow but variable growth patterns. In this study, we examined the effect of imatinib mesylate, a receptor tyrosine kinase inhibitor, on PNF-derived Schwann cells and PNF tumour growth in vitro and in vivo. In vitro, PNF-derived primary Schwann cells express platelet-derived growth factors receptors (PDGFR) alpha and beta, both targets of imatinib, and cell viability was reduced by imatinib mesylate, with 50% inhibition concentration (IC(50)) of 10 microM. For in vivo studies, PNF tumour fragments xenografted onto the sciatic nerve of athymic nude mice were first characterized. The tumours persisted for at least 63 days and maintained typical characteristics of PNFs such as complex cellular composition, low proliferation rate and angiogenesis. A transient enlargement of the graft size was due to inflammation by host cells. Treatment with imatinib mesylate at a daily dose of 75 mg/kg for 4 weeks reduced the graft size by an average of 80% (n = 8), significantly different from the original sizes within the group and from sizes of the grafts in 11 untreated mice in the control group (P < 0.001). We demonstrated that grafting human PNF tumour fragments into nude mice provides an adequate in vivo model for drug testing. Our results provide in vivo and in vitro evidence for efficacy of imatinib mesylate for PNF.
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MESH Headings
- Adolescent
- Adult
- Animals
- Benzamides
- Brain Neoplasms/drug therapy
- Brain Neoplasms/pathology
- Cell Line, Tumor
- Cell Size/drug effects
- Cell Survival/drug effects
- Disease Models, Animal
- Dose-Response Relationship, Drug
- Female
- Gene Expression Regulation, Neoplastic/drug effects
- Humans
- Imatinib Mesylate
- Ki-67 Antigen/metabolism
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Nude
- Middle Aged
- Neoplasm Transplantation/methods
- Neurofibroma, Plexiform/drug therapy
- Neurofibroma, Plexiform/pathology
- Piperazines/pharmacology
- Protein Kinase Inhibitors/pharmacology
- Pyrimidines/pharmacology
- Receptor, Platelet-Derived Growth Factor alpha/metabolism
- Receptor, Platelet-Derived Growth Factor beta/metabolism
- S100 Proteins/metabolism
- Schwann Cells/cytology
- Schwann Cells/drug effects
- Young Adult
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Affiliation(s)
- Maria Demestre
- Department of Maxillofacial Surgery, University Medical Centre Hamburg Eppendorf, Martinistrasse 52, 20246, Hamburg, Germany
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Demestre M, Messerli SM, Celli N, Shahhossini M, Kluwe L, Mautner V, Maruta H. CAPE (caffeic acid phenethyl ester)-based propolis extract (Bio 30) suppresses the growth of human neurofibromatosis (NF) tumor xenografts in mice. Phytother Res 2009; 23:226-30. [DOI: 10.1002/ptr.2594] [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: 12/19/2022]
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19
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Gushchina S, Leinster V, Wu D, Jasim A, Demestre M, Lopez de Heredia L, Michael GJ, Barker PA, Richardson PM, Magoulas C. Observations on the function of nuclear factor kappa B (NF-kappaB) in the survival of adult primary sensory neurons after nerve injury. Mol Cell Neurosci 2008; 40:207-16. [PMID: 19049877 DOI: 10.1016/j.mcn.2008.10.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Revised: 10/13/2008] [Accepted: 10/16/2008] [Indexed: 01/14/2023] Open
Abstract
Peripheral nerve transections cause much more neuronal death in embryonic and neonatal dorsal root ganglia (DRG) than in adult DRG. Here we used transgenic approaches to examine the hypothesis that NF-kappaB is an important intrinsic factor of adult DRG neurons for their in vivo capacity to survive after nerve injury. We generated transgenic mice expressing the NF-kappaB super-inhibitor (IkappaBalpha-SI), a multi-mutant form of IkappaBalpha, specifically in adult neurons. Adult DRG neurons in these transgenic animals are not abnormally susceptible to apoptosis after peripheral nerve injury, although there is a significant inhibition in the ability of NF-kappaB to translocate into their nucleus. We investigated the observed lack of NF-kappaB neuroprotective function at the level of NF-kappaB transcriptional activity using transgenic NF-kappaB/LacZ reporter mice. We show that the expression of the NF-kappaB reporter transgene is restricted in naïve and injured DRG neurons. However, NF-kappaB transcriptional activity in adult DRG neurons is evident upon exposure to Trichostatin A (TSA) which is a specific inhibitor of histone deacetylases. Taken together our results illustrate that the functions of NF-kappaB are limited in adult primary sensory neurons due to a transcriptional repression mechanism mediated by histone deacetylases, and that intrinsic neuroprotective factors other than NF-kappaB are responsible for the resistance of adult DRG neurons to apoptosis in response to nerve injury.
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Affiliation(s)
- Svetlana Gushchina
- Neuroscience Centre, Institute of Cell and Molecular Science, Barts and The London School of Medicine and Dentistry, Queen Mary, University of London, 4 Newark Street, Whitechapel, London E12AT, UK
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20
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Demestre M, de Juan S, Sartor P, Ligas A. Seasonal closures as a measure of trawling effort control in two Mediterranean trawling grounds: effects on epibenthic communities. Mar Pollut Bull 2008; 56:1765-1773. [PMID: 18649897 DOI: 10.1016/j.marpolbul.2008.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2007] [Revised: 05/29/2008] [Accepted: 06/07/2008] [Indexed: 05/26/2023]
Abstract
Within the framework of ecosystem-based management, we focused on the use of seasonal closures as effective measures to minimise the degradation of benthic communities by trawling. These closures imply the complete cessation of trawling fleet activity and are commonly used in the Mediterranean to reduce the annual fishing effort, with the ultimate goal of effective resource management. In this study, we aimed to investigate how epibenthic communities respond to seasonal closures. The potential benefits of short-term annual closures in two Mediterranean fishing grounds were evaluated by analysing changes in community structure and composition that were linked to the closure. A decrease of faunal abundance was observed with the resumption of fishing activity after the closure at both fishing grounds. Remarkably, results indicated that some large and mobile fauna were able to respond to these closures. We concluded that the currently planned closures are too short to benefit benthic communities.
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Affiliation(s)
- M Demestre
- Institut de Ciències del Mar, CSIC, Passeig Marítim de la Barceloneta 37-49, 08003 Barcelona, Spain.
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21
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Demestre M, Howard RS, Orrell RW, Pullen AH. Serine proteases purified from sera of patients with amyotrophic lateral sclerosis (ALS) induce contrasting cytopathology in murine motoneurones to IgG. Neuropathol Appl Neurobiol 2006; 32:141-56. [PMID: 16599943 DOI: 10.1111/j.1365-2990.2006.00712.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 11/29/2022]
Abstract
Affinity purified IgG from sera of patients with amyotrophic lateral sclerosis (ALS) is claimed to enhance transmitter release, induce apoptotic death of cultured motoneurones, and elicit a distinctive cytopathology with raised Ca(2+) in mouse motoneurones. An alternative hypothesis attributes these events to serine proteases in ALS sera. To test this, motoneurones in BALB/c mice injected intraperitoneally with plasminogen affinity purified from sera of ALS patients and healthy controls were analysed using immunochemical and ultrastructural morphometric methods. The responses were validated in motoneurones of mice injected with commercially purified plasminogen, tissue plasminogen activator (tPA), or plasmin. Motoneurones in non-injected mice had normal morphology and ultrastructure without evidence of electron-dense degeneration. Purified plasminogen from both ALS patients and healthy controls, evoked electron-dense motoneurone degeneration, as did commercially purified plasminogen and tPA. The common cytopathology comprised disruption and distension of Nissl body rough endoplasmic reticulum, cytoplasmic polyribosomal proliferation, and significant Ca(2+) enhancement in mitochondria. By contrast, using affinity purified serum immunoglobulins, ALS-IgG but not IgG from healthy or disease controls, elicited necrosis, with 30% of ALS-IgGs tested evoking electron-dense degeneration in 40% of motoneurones. The primary cytopathology was extensive swelling of Golgi endoplasmic reticulum and mitochondria, with enhancement of Ca(2+) in Golgi endoplasmic reticulum and presynaptic boutons. We conclude that serine proteases purified from sera of ALS patients elicits a distinctive cytopathology and pattern of Ca(2+) enhancement in motoneurones different from that found on passive transfer of affinity purified ALS-IgG.
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Affiliation(s)
- M Demestre
- Sobell Department of Motor Neuroscience, Institute of Neurology, University College London, London, UK
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22
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Abstract
In a nerve crush model of denervation, we examined muscle matrix metalloproteinase (MMP) expression, localization and activity. In normal muscle, MMP mRNA levels were low, and immunohistochemically MMPs were distributed around the muscle fibre with MMPs-3, -7 and -9 also staining at the neuromuscular junction. Seven days after nerve crush, muscle MMP immunoreactivity, especially MMP-12 and MMP-14, became irregularly distributed. At 20 days reinnervation of the muscle was observed, and some restitution of the normal pattern of immunoreactivity was noted concomitant with a higher level of MMP mRNA expression. In situ zymography showed that MMP activity was very weak in normal muscle whereas it was increased up to 40 days following denervation. Our results suggest that MMPs in muscle are involved in the tissue changes following denervation. Further experiments are required to test the hypothesis that MMP inhibition may be beneficial in protecting muscle from excessive remodelling following denervation and therefore improve reinnervation.
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Affiliation(s)
- M Demestre
- Department of Clinical Neurosciences, Guy's, King's and St. Thomas' School of Medicine, London, SEI 1UL, UK.
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23
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Abstract
There is evidence that in sporadic amyotrophic lateral sclerosis (ALS) immunological mechanisms may be involved in the pathophysiology of the disease. We tested whether purified IgG from ALS patients induce cell death in rat mixed primary spinal cord cultures and compared this with the effect of IgG purified from patients with Guillain-Barré syndrome (GBS) or from healthy donors. Treatment with ALS-IgG increases caspase-3 apoptosis when compared with control IgG or with GBS-IgG, but does not induce death by necrosis. Because ALS is characterized by the selective loss of motor neurones, we next assessed the differential effect of ALS-IgG on motor neurones or astrocytes. We showed, semiquantitatively, that motor neurones are more susceptible to apoptosis when cultures were treated with ALS-IgG compared with control-IgG. In conclusion, we have demonstrated in primary spinal cord cultures that IgG from patients with ALS induces apoptosis selectively in motor neurones, and that the caspase-3 pathway is involved. This suggests that immunological mechanisms may contribute to the selective loss of motor neurones in ALS.
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Affiliation(s)
- M Demestre
- Sobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, University College London, UK.
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Espejo C, Penkowa M, Demestre M, Montalban X, Martínez-Cáceres EM. Time-course expression of CNS inflammatory, neurodegenerative tissue repair markers and metallothioneins during experimental autoimmune encephalomyelitis. Neuroscience 2005; 132:1135-49. [PMID: 16078373 DOI: 10.1016/j.neuroscience.2005.01.057] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [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: 11/27/2022]
Abstract
Experimental autoimmune encephalomyelitis (EAE) is an animal model for multiple sclerosis (MS). EAE and MS are characterized by CNS inflammation, demyelination and neurodegeneration. The inflammatory response occurring within the CNS leads to glial activation, dysfunction and death, as well as axonal damage and neurological deficit. Although the pathogenic mechanisms involved in EAE/MS are not well understood, accumulating data suggest that oxidative stress plays a major role in lesion development, and contributes to axonal dysfunction and degeneration. Metallothionein-I and -II are anti-inflammatory, neuroprotective, antioxidant proteins expressed during EAE and MS, in which they might play a protective role. The present study aimed to describe the expression profile of a group of inflammatory, neurodegenerative and tissue repair markers as well as metallothioneins during proteolipid protein-induced EAE, and to establish the time-relationships these molecules had during EAE. Interestingly, we found two marker expression profiles. In the first, marker expression increased as clinical signs worsened and reverted to baseline expression during recovery; in the second, marker expression increased at a later point during relapse, peaked at highest clinical score, and remained elevated throughout recovery. Of note, metallothionein expression was found to be related to the second profile, which would suggest that metallothionein proteins are implicated in the clinical recovery of EAE and perhaps these antioxidant proteins may provide therapeutic benefits in MS.
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Affiliation(s)
- C Espejo
- Unitat de Neuroimmunologia Clínica, Hospital Universitari, Pg. Vall d'Hebron 119-129, 08035 Barcelona, Spain.
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Demestre M, Parkin-Smith G, Petzold A, Pullen AH. The pro and the active form of matrix metalloproteinase-9 is increased in serum of patients with amyotrophic lateral sclerosis. J Neuroimmunol 2004; 159:146-54. [PMID: 15652414 DOI: 10.1016/j.jneuroim.2004.09.015] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2004] [Revised: 09/20/2004] [Accepted: 09/20/2004] [Indexed: 11/24/2022]
Abstract
Pro and active-matrix metalloproteinase-9 (MMP-9) was measured in sera from patients with amyotrophic lateral sclerosis (ALS), Guillain-Barre syndome (GBS), and healthy subjects. Both forms of MMP-9 were elevated in sera of ALS and GBS patients, compared with healthy controls. It has been postulated that elevated MMP-9 reflects damage to peripheral nerve and muscle. This possibility was investigated in sera, and tissue extracts of sciatic nerves and muscle from mice 5 and 12 days after axotomy of the sciatic nerve. Pro-MMP-9 was elevated in sera and extracts of damaged nerve and muscle, suggesting such damage may be followed by elevated pro-MM9-9 in sera. Active MMP-9 was only elevated in the sera. However, in situ activation of MMP-9 is tightly regulated and localised, and probably difficult to demonstrate by ELISA, resulting in a short half-life active MMP-9, implying any active MMP-9 in the serum may have a more immediate origin than injured muscle or nerve, for example circulating blood cells.
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Affiliation(s)
- M Demestre
- Sobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, The National Hospital for Neurology and Neurosurgery, University College London, Queen Square, London WC1N 3BG, UK.
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26
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Demestre M, Wells GM, Miller KM, Smith KJ, Hughes RAC, Gearing AJ, Gregson NA. Characterisation of matrix metalloproteinases and the effects of a broad-spectrum inhibitor (BB-1101) in peripheral nerve regeneration. Neuroscience 2004; 124:767-79. [PMID: 15026117 DOI: 10.1016/j.neuroscience.2003.12.037] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/23/2003] [Indexed: 11/17/2022]
Abstract
The effect of treatment with a broad-spectrum inhibitor (BB1101) of the matrix metalloproteinases (MMPs) on nerve regeneration and functional recovery after nerve crush was examined. Drug treatment had no effect on latency but from 63 days the compound muscle action potential was significantly increased and was no different to that in the sham-operated controls at 72 days. Levels of MMP mRNA expression, and the localisation and activity of MMP proteins, were examined in rats for a 2 month period following a nerve crush injury, and compared with sham-operated controls. The mRNA of all the MMPs studied was up-regulated by 5-10 days after nerve crush, and they remained up-regulated for 40-63 days, except for MMP-9 which was down-regulated by 10 days. MMP immunoreactivity was localised to Schwann cells, macrophages and endothelial cells, and with the exception of membrane type 1-MMP (MT1-MMP), it was more intense after nerve crush compared with sham-operated controls. Regenerating axons showed immunoreactivity for MMP-2 and MMP-3. In situ zymography confirmed that the activity of MMPs in the nerve was increased following crush but that the activity was greatly reduced in rats treated with BB-1101. Thus despite the inhibition of MMPs by BB-1101, the drug did not appear to essentially affect nerve degeneration or regeneration following nerve crush but that it could be beneficial in promoting the more effective reinnervation of muscles possibly by actions at the level of the muscles.
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Affiliation(s)
- M Demestre
- Department of Clinical Neurosciences, Guy's, King's and St. Thomas' School of Medicine, Guy's Campus, London SE1 1UL, UK.
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27
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Pullen AH, Demestre M, Howard RS, Orrell RW. Passive transfer of purified IgG from patients with amyotrophic lateral sclerosis to mice results in degeneration of motor neurons accompanied by Ca2+ enhancement. Acta Neuropathol 2004; 107:35-46. [PMID: 14551798 DOI: 10.1007/s00401-003-0777-z] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2003] [Revised: 08/21/2003] [Accepted: 09/08/2003] [Indexed: 10/26/2022]
Abstract
It has been reported that immunoglobulins (IgG) in sera of patients with amyotrophic lateral sclerosis (ALS) kill cultured motoneurones (MN), but whether they also cause MN degeneration in vivo is unclear. To test this, protein-A affinity purified and dialysed IgGs were prepared from sera of 44 ALS patients without paraproteinemias, 20 healthy controls and 15 disease controls. Control and ALS-IgGs were injected intraperitoneally into groups of mice for 5 consecutive days and examined at day 8. IgG was localised immunocytochemically and spinal MN were characterised histologically and ultrastructurally and by comparative counts of Ca(2+) containing organelles revealed with oxylate-pyroantimonate histochemistry. ELISA revealed no differences in IgG concentration between ALS patients and control subjects. Immunocytochemistry showed IgG was present in MN of mice injected with control or ALS-IgG, but densitometry showed immunostaining in MN was stronger in mice injected with ALS-IgG. Compared to MN of non-injected mice, control-IgG-treated mice showed near normal MN morphology and numbers of Ca(2+)-containing organelles. Disease control IgGs evoked negligible or minor morphological changes according to disease, but normal numbers of Ca(2+) containing organelles. Ultrastructurally, about 70% of ALS-derived IgGs induced a population of MN with electron lucent cytoplasm, distended Golgi, disrupted Nissl and mitochondria (i.e., necrosis). However 30% of ALS-IgGs additionally induced electron-dense degeneration in 40% of the MN. These MN exhibited shrinkage, condensed nuclear chromatin and ill-defined nuclear membranes and resembled preliminary stages of apoptosis. We conclude that passive transfer of ALS-derived, but not control IgGs, does result in MN degeneration in the recipient mice. This appears to be associated with abnormal calcium homeostasis, but the exact target of ALS-IgG remains conjectural, and the possibilities are discussed.
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Affiliation(s)
- A H Pullen
- Sobell Department of Motor Neuroscience, Institute of Neurology, UCL, Queen Square, WC1 N 3BG, London, UK.
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28
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Lowry JP, Demestre M, Fillenz M. Relation between cerebral blood flow and extracellular glucose in rat striatum during mild hypoxia and hyperoxia. Dev Neurosci 2000; 20:52-8. [PMID: 9600390 DOI: 10.1159/000017298] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [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: 11/19/2022] Open
Abstract
Rats were exposed to mild hyperoxia and hypoxia by the administration of oxygen/air and nitrogen/air mixtures through plastic tubing held close to their snouts for periods of 3 min. Changes in tissue oxygen were monitored at an implanted carbon paste electrode; local cerebral blood flow (rCBF) at an implanted platinum electrode using the hydrogen clearance technique; extracellular brain glucose at an implanted glucose oxidase-based biosensor and changes in lactate were measured using microdialysis. The nitrogen/air mixture led to a decrease in tissue oxygen, an increase in rCBF, a decrease in extracellular glucose, and an increase in lactate. The oxygen/air mixture led to an increase in tissue oxygen and extracellular glucose but no change in lactate or rCBF. The effects in unanaesthetised rats were compared with those in rats given 350 mg/kg chloral hydrate. The increase in lactate was greater in unanaesthetised than anaesthetised rats. The results show a dissociation between changes in rCBF and extracellular glucose and suggest that changes in oxygen affect utilisation rather than supply of glucose to the extracellular compartment.
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Affiliation(s)
- J P Lowry
- University Laboratory of Physiology, Oxford, UK
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29
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Demestre M, Gregson NA, Smith KJ, Miller KM, Gearing AJ, Hughes RA. Effect of a matrix metalloproteinase inhibitor (BB-1101) on nerve regeneration. Ann N Y Acad Sci 1999; 878:658-61. [PMID: 10415800 DOI: 10.1111/j.1749-6632.1999.tb07754.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M Demestre
- Department of Clinical Neuroscience, GKT Medical School, London, UK.
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30
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Abstract
1. Physiological stimulation of neuronal activity induces an increase in extracellular lactate. Experiments were designed to determine the role of the reuptake of neuronally released glutamate in lactate delivery to the extracellular compartment. 2. In vivo microdialysis was used in freely moving rats. The lactate concentration in striatal dialysate was assayed using an enzyme-based on-line assay at 1 min intervals. Drugs were given locally through the dialysis probe. 3. The extracellular concentration of lactate, determined using the zero net flux method, was 346 +/- 21 microM. 4. Induced grooming caused a maximal increase in lactate concentration in striatal dialysate of 58 +/- 10%. 5. Administration of 100 microM glutamate caused a transient increase in dialysate lactate concentration of 72 +/- 17%. 6. A 20 min infusion of the glutamate uptake blockers beta-D,L-threohydroxyaspartate (THA) or pirrolidine-2-4-dicarboxylate (PDC) produced an increase in basal lactate, which was sustained in response to THA and transient in response to PDC. 7. Grooming induced during the infusion of PDC produced no significant increase in lactate. 8. Grooming induced after the infusion of the glutamate uptake blockers gave rise to a reduced increase in lactate. 9. These results support the hypothesis that stimulated release of lactate is dependent on the uptake of glutamate.
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Affiliation(s)
- M Demestre
- University Laboratory of Physiology, Oxford, UK
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