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Merino‐Serrais P, Plaza‐Alonso S, Hellal F, Valero‐Freitag S, Kastanauskaite A, Plesnila N, DeFelipe J. Structural changes of CA1 pyramidal neurons after stroke in the contralesional hippocampus. Brain Pathol 2024; 34:e13222. [PMID: 38012061 PMCID: PMC11007010 DOI: 10.1111/bpa.13222] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 10/30/2023] [Indexed: 11/29/2023] Open
Abstract
Significant progress has been made with regard to understanding how the adult brain responds after a stroke. However, a large number of patients continue to suffer lifelong disabilities without adequate treatment. In the present study, we have analyzed possible microanatomical alterations in the contralesional hippocampus from the ischemic stroke mouse model tMCAo 12-14 weeks after transient middle cerebral artery occlusion. After individually injecting Lucifer yellow into pyramidal neurons from the CA1 field of the hippocampus, we performed a detailed three-dimensional analysis of the neuronal complexity, dendritic spine density, and morphology. We found that, in both apical (stratum radiatum) and basal (stratum oriens) arbors, CA1 pyramidal neurons in the contralesional hippocampus of tMCAo mice have a significantly higher neuronal complexity, as well as reduced spine density and alterations in spine volume and spine length. Our results show that when the ipsilateral hippocampus is dramatically damaged, the contralesional hippocampus exhibits several statistically significant selective alterations. However, these alterations are not as significant as expected, which may help to explain the recovery of hippocampal function after stroke. Further anatomical and physiological studies are necessary to better understand the modifications in the "intact" contralesional lesioned brain regions, which are probably fundamental to recover functions after stroke.
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Affiliation(s)
- Paula Merino‐Serrais
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología BiomédicaUniversidad Politécnica de MadridMadridSpain
- Departamento de Neurobiología Funcional y de SistemasInstituto Cajal, CSICMadridSpain
| | - Sergio Plaza‐Alonso
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología BiomédicaUniversidad Politécnica de MadridMadridSpain
- Departamento de Neurobiología Funcional y de SistemasInstituto Cajal, CSICMadridSpain
| | - Farida Hellal
- Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University Hospital, Ludwig‐Maximilians‐University Munich (LMU)MunichGermany
- iTERM, Helmholtz CenterMunichGermany
- Munich Cluster of Systems Neurology (Synergy)MunichGermany
| | - Susana Valero‐Freitag
- Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University Hospital, Ludwig‐Maximilians‐University Munich (LMU)MunichGermany
| | - Asta Kastanauskaite
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología BiomédicaUniversidad Politécnica de MadridMadridSpain
- Departamento de Neurobiología Funcional y de SistemasInstituto Cajal, CSICMadridSpain
| | - Nikolaus Plesnila
- Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University Hospital, Ludwig‐Maximilians‐University Munich (LMU)MunichGermany
- Munich Cluster of Systems Neurology (Synergy)MunichGermany
| | - Javier DeFelipe
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología BiomédicaUniversidad Politécnica de MadridMadridSpain
- Departamento de Neurobiología Funcional y de SistemasInstituto Cajal, CSICMadridSpain
- CIBER de Enfermedades Neurodegenerativas, Instituto de Salud Carlos IIIMadridSpain
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2
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Mai H, Luo J, Hoeher L, Al-Maskari R, Horvath I, Chen Y, Kofler F, Piraud M, Paetzold JC, Modamio J, Todorov M, Elsner M, Hellal F, Ertürk A. Whole-body cellular mapping in mouse using standard IgG antibodies. Nat Biotechnol 2024; 42:617-627. [PMID: 37430076 PMCID: PMC11021200 DOI: 10.1038/s41587-023-01846-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 05/26/2023] [Indexed: 07/12/2023]
Abstract
Whole-body imaging techniques play a vital role in exploring the interplay of physiological systems in maintaining health and driving disease. We introduce wildDISCO, a new approach for whole-body immunolabeling, optical clearing and imaging in mice, circumventing the need for transgenic reporter animals or nanobody labeling and so overcoming existing technical limitations. We identified heptakis(2,6-di-O-methyl)-β-cyclodextrin as a potent enhancer of cholesterol extraction and membrane permeabilization, enabling deep, homogeneous penetration of standard antibodies without aggregation. WildDISCO facilitates imaging of peripheral nervous systems, lymphatic vessels and immune cells in whole mice at cellular resolution by labeling diverse endogenous proteins. Additionally, we examined rare proliferating cells and the effects of biological perturbations, as demonstrated in germ-free mice. We applied wildDISCO to map tertiary lymphoid structures in the context of breast cancer, considering both primary tumor and metastases throughout the mouse body. An atlas of high-resolution images showcasing mouse nervous, lymphatic and vascular systems is accessible at http://discotechnologies.org/wildDISCO/atlas/index.php .
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Affiliation(s)
- Hongcheng Mai
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
- Institute for Stroke and Dementia Research, Medical Centre of the University of Munich, Ludwig-Maximilians University of Munich, Munich, Germany
- Munich Medical Research School, Munich, Germany
- Deep Piction GmbH, Munich, Germany
| | - Jie Luo
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
- Institute for Stroke and Dementia Research, Medical Centre of the University of Munich, Ludwig-Maximilians University of Munich, Munich, Germany
- Deep Piction GmbH, Munich, Germany
| | - Luciano Hoeher
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
| | - Rami Al-Maskari
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
- TUM School of Computation, Information and Technology, Technical University of Munich, Munich, Germany
| | - Izabela Horvath
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
- TUM School of Computation, Information and Technology, Technical University of Munich, Munich, Germany
| | - Ying Chen
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
- Institute for Stroke and Dementia Research, Medical Centre of the University of Munich, Ludwig-Maximilians University of Munich, Munich, Germany
- Faculty of Medicine, Ludwig-Maximilians University of Munich, Munich, Germany
| | - Florian Kofler
- Helmholtz Al, Helmholtz Center Munich, Neuherberg, Germany
- Department of Informatics, Technical University of Munich, Munich, Germany
- TranslaTUM - Central Institute for Translational Cancer Research, Technical University of Munich, Munich, Germany
- Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Marie Piraud
- Helmholtz Al, Helmholtz Center Munich, Neuherberg, Germany
| | - Johannes C Paetzold
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
- Department of Computing, Imperial College London, London, UK
| | - Jennifer Modamio
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
| | - Mihail Todorov
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
- Institute for Stroke and Dementia Research, Medical Centre of the University of Munich, Ludwig-Maximilians University of Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Markus Elsner
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
| | - Farida Hellal
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany
- Institute for Stroke and Dementia Research, Medical Centre of the University of Munich, Ludwig-Maximilians University of Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Ali Ertürk
- Institute for Tissue Engineering and Regenerative Medicine, Helmholtz Center Munich, Neuherberg, Germany.
- Institute for Stroke and Dementia Research, Medical Centre of the University of Munich, Ludwig-Maximilians University of Munich, Munich, Germany.
- Deep Piction GmbH, Munich, Germany.
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany.
- Graduate School of Neuroscience (GSN), Munich, Germany.
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3
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Pilipenko V, Dzirkale Z, Rozkalne R, Upite J, Hellal F, Plesnila N, Jansone B. Focal Cerebral Ischemia Induces Global Subacute Changes in the Number of Neuroblasts and Neurons and the Angiogenic Factor Density in Mice. Medicina (Kaunas) 2023; 59:2168. [PMID: 38138271 PMCID: PMC10745011 DOI: 10.3390/medicina59122168] [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] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/08/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
Background and Objectives: Dissecting the complex pathological cascade of an ischemic stroke in preclinical models is highly warranted to understand the course of this disease in humans. Neurogenesis and angiogenesis are integral for post-stroke recovery, yet it is not clear how these processes are altered months after an ischemic stroke. In this study, we investigated the changes that take place subacutely after focal cerebral ischemia in experimental adult male mice. Materials and Methods: Male 12-week-old C57BL/6 mice underwent a 60 min long fMCAo or sham surgery. Two months after the procedure, we examined the immunohistochemistry to assess the changes in neuroblast (DCX) and differentiated neuron (NeuN) numbers, as well as the density of the pro-angiogenic factor VEGF. Results: We found decreased neuroblast numbers in both brain hemispheres of the fMCAo mice: by more than 85% in the dentate gyrus and by more than 70% in the subventricular zone. No neuroblasts were found in the contralateral hemisphere of the fMCAO mice or the sham controls, but a small population was detected in the ipsilateral ischemic core of the fMCAo mice. Intriguingly, the number of differentiated neurons in the ipsilateral ischemic core was lower by 20% compared to the contralateral hemisphere. VEGF expression was diminished in both brain hemispheres of the fMCAo mice. Conclusions: Our current report shows that focal cerebral ischemia induces changes in neuroblast numbers and the pro-angiogenic factor VEGF in both cerebral hemispheres 2 months after an fMCAo in mice. Our data show that focal cerebral ischemia induces a long-term regenerative response in both brain hemispheres.
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Affiliation(s)
- Vladimirs Pilipenko
- Department of Pharmacology, Faculty of Medicine, University of Latvia, Raina blvd. 19, LV-1586 Riga, Latvia; (Z.D.); (J.U.)
| | - Zane Dzirkale
- Department of Pharmacology, Faculty of Medicine, University of Latvia, Raina blvd. 19, LV-1586 Riga, Latvia; (Z.D.); (J.U.)
| | - Rebeka Rozkalne
- Department of Pharmacology, Faculty of Medicine, University of Latvia, Raina blvd. 19, LV-1586 Riga, Latvia; (Z.D.); (J.U.)
| | - Jolanta Upite
- Department of Pharmacology, Faculty of Medicine, University of Latvia, Raina blvd. 19, LV-1586 Riga, Latvia; (Z.D.); (J.U.)
| | - Farida Hellal
- Institute for Stroke and Dementia Research, University Hospital, Ludwig Maximilian University Munich, 81377 München, Germany; (F.H.); (N.P.)
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research, University Hospital, Ludwig Maximilian University Munich, 81377 München, Germany; (F.H.); (N.P.)
| | - Baiba Jansone
- Department of Pharmacology, Faculty of Medicine, University of Latvia, Raina blvd. 19, LV-1586 Riga, Latvia; (Z.D.); (J.U.)
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4
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Kolabas ZI, Kuemmerle LB, Perneczky R, Förstera B, Ulukaya S, Ali M, Kapoor S, Bartos LM, Büttner M, Caliskan OS, Rong Z, Mai H, Höher L, Jeridi D, Molbay M, Khalin I, Deligiannis IK, Negwer M, Roberts K, Simats A, Carofiglio O, Todorov MI, Horvath I, Ozturk F, Hummel S, Biechele G, Zatcepin A, Unterrainer M, Gnörich J, Roodselaar J, Shrouder J, Khosravani P, Tast B, Richter L, Díaz-Marugán L, Kaltenecker D, Lux L, Chen Y, Zhao S, Rauchmann BS, Sterr M, Kunze I, Stanic K, Kan VWY, Besson-Girard S, Katzdobler S, Palleis C, Schädler J, Paetzold JC, Liebscher S, Hauser AE, Gokce O, Lickert H, Steinke H, Benakis C, Braun C, Martinez-Jimenez CP, Buerger K, Albert NL, Höglinger G, Levin J, Haass C, Kopczak A, Dichgans M, Havla J, Kümpfel T, Kerschensteiner M, Schifferer M, Simons M, Liesz A, Krahmer N, Bayraktar OA, Franzmeier N, Plesnila N, Erener S, Puelles VG, Delbridge C, Bhatia HS, Hellal F, Elsner M, Bechmann I, Ondruschka B, Brendel M, Theis FJ, Erturk A. Distinct molecular profiles of skull bone marrow in health and neurological disorders. Cell 2023; 186:3706-3725.e29. [PMID: 37562402 PMCID: PMC10443631 DOI: 10.1016/j.cell.2023.07.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 04/24/2023] [Accepted: 07/07/2023] [Indexed: 08/12/2023]
Abstract
The bone marrow in the skull is important for shaping immune responses in the brain and meninges, but its molecular makeup among bones and relevance in human diseases remain unclear. Here, we show that the mouse skull has the most distinct transcriptomic profile compared with other bones in states of health and injury, characterized by a late-stage neutrophil phenotype. In humans, proteome analysis reveals that the skull marrow is the most distinct, with differentially expressed neutrophil-related pathways and a unique synaptic protein signature. 3D imaging demonstrates the structural and cellular details of human skull-meninges connections (SMCs) compared with veins. Last, using translocator protein positron emission tomography (TSPO-PET) imaging, we show that the skull bone marrow reflects inflammatory brain responses with a disease-specific spatial distribution in patients with various neurological disorders. The unique molecular profile and anatomical and functional connections of the skull show its potential as a site for diagnosing, monitoring, and treating brain diseases.
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Affiliation(s)
- Zeynep Ilgin Kolabas
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; Graduate School of Systemic Neurosciences (GSN), Munich, Germany
| | - Louis B Kuemmerle
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute of Computational Biology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Robert Perneczky
- Division of Mental Health in Older Adults and Alzheimer Therapy and Research Center, Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University Munich, 80336 Munich, Germany; German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Ageing Epidemiology (AGE) Research Unit, School of Public Health, Imperial College London, London, UK; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany; Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK
| | - Benjamin Förstera
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Selin Ulukaya
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany
| | - Mayar Ali
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Graduate School of Systemic Neurosciences (GSN), Munich, Germany; Institute of Computational Biology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Saketh Kapoor
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany
| | - Laura M Bartos
- Department of Nuclear Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Maren Büttner
- Institute of Computational Biology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Ozum Sehnaz Caliskan
- Institute for Diabetes and Obesity, Helmholtz Center Munich and German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Zhouyi Rong
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; Munich Medical Research School (MMRS), 80336 Munich, Germany
| | - Hongcheng Mai
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; Munich Medical Research School (MMRS), 80336 Munich, Germany
| | - Luciano Höher
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany
| | - Denise Jeridi
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany
| | - Muge Molbay
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany
| | - Igor Khalin
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | | | - Moritz Negwer
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany
| | | | - Alba Simats
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Olga Carofiglio
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Mihail I Todorov
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Izabela Horvath
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; School of Computation, Information and Technology (CIT), TUM, Boltzmannstr. 3, 85748 Garching, Germany
| | - Furkan Ozturk
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany
| | - Selina Hummel
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Department of Nuclear Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Gloria Biechele
- Department of Nuclear Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Artem Zatcepin
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Department of Nuclear Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Marcus Unterrainer
- Department of Nuclear Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany; Department of Radiology, University Hospital, LMU Munich, Munich, Germany
| | - Johannes Gnörich
- Department of Nuclear Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Jay Roodselaar
- Charité - Universitätsmedizin Berlin, Department of Rheumatology and Clinical Immunology, Berlin, Germany; Immune Dynamics, Deutsches Rheuma-Forschungszentrum (DRFZ), a Leibniz Institute, Berlin, Germany
| | - Joshua Shrouder
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Pardis Khosravani
- Biomedical Center (BMC), Core Facility Flow Cytometry, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Benjamin Tast
- Biomedical Center (BMC), Core Facility Flow Cytometry, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Lisa Richter
- Biomedical Center (BMC), Core Facility Flow Cytometry, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Laura Díaz-Marugán
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Doris Kaltenecker
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Diabetes and Cancer, Helmholtz Munich, Munich, Germany
| | - Laurin Lux
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany
| | - Ying Chen
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Shan Zhao
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Boris-Stephan Rauchmann
- Division of Mental Health in Older Adults and Alzheimer Therapy and Research Center, Department of Psychiatry and Psychotherapy, University Hospital, Ludwig Maximilian University Munich, 80336 Munich, Germany; Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, UK; Institute of Neuroradiology, University Hospital LMU, Munich, Germany
| | - Michael Sterr
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany; Institute of Stem Cell Research, Helmholtz Zentrum München, Neuherberg, Germany
| | - Ines Kunze
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany; Institute of Stem Cell Research, Helmholtz Zentrum München, Neuherberg, Germany
| | - Karen Stanic
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Vanessa W Y Kan
- Institute of Clinical Neuroimmunology, University Hospital Munich, Ludwig-Maximilians University Munich, Munich, Germany
| | - Simon Besson-Girard
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; Graduate School of Systemic Neurosciences (GSN), Munich, Germany
| | - Sabrina Katzdobler
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Department of Neurology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Carla Palleis
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Department of Neurology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Julia Schädler
- Institute of Legal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Johannes C Paetzold
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Department of Computing, Imperial College London, London, UK
| | - Sabine Liebscher
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany; Institute of Clinical Neuroimmunology, University Hospital Munich, Ludwig-Maximilians University Munich, Munich, Germany; Biomedical Center (BMC), Medical Faculty, Ludwig-Maximilians Universität Munich, Munich, Germany
| | - Anja E Hauser
- Charité - Universitätsmedizin Berlin, Department of Rheumatology and Clinical Immunology, Berlin, Germany; Immune Dynamics, Deutsches Rheuma-Forschungszentrum (DRFZ), a Leibniz Institute, Berlin, Germany
| | - Ozgun Gokce
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Heiko Lickert
- Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Zentrum München, Neuherberg, Germany; Institute of Stem Cell Research, Helmholtz Zentrum München, Neuherberg, Germany; TUM School of Medicine, Technical University of Munich, Munich, Germany
| | - Hanno Steinke
- Institute of Anatomy, University of Leipzig, 04109 Leipzig, Germany
| | - Corinne Benakis
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Christian Braun
- Institute of Legal Medicine, Faculty of Medicine, LMU Munich, Germany
| | - Celia P Martinez-Jimenez
- Helmholtz Pioneer Campus (HPC), Helmholtz Munich, Neuherberg, Germany; TUM School of Medicine, Technical University of Munich, Munich, Germany
| | - Katharina Buerger
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
| | - Nathalie L Albert
- Department of Nuclear Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Günter Höglinger
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Department of Neurology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Johannes Levin
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany; Department of Neurology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Christian Haass
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany; Metabolic Biochemistry, Biomedical Center (BMC), Faculty of Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Anna Kopczak
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Martin Dichgans
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Joachim Havla
- Institute of Clinical Neuroimmunology, University Hospital Munich, Ludwig-Maximilians University Munich, Munich, Germany; Biomedical Center (BMC), Medical Faculty, Ludwig-Maximilians Universität Munich, Munich, Germany
| | - Tania Kümpfel
- Institute of Clinical Neuroimmunology, University Hospital Munich, Ludwig-Maximilians University Munich, Munich, Germany; Biomedical Center (BMC), Medical Faculty, Ludwig-Maximilians Universität Munich, Munich, Germany
| | - Martin Kerschensteiner
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany; Institute of Clinical Neuroimmunology, University Hospital Munich, Ludwig-Maximilians University Munich, Munich, Germany; Biomedical Center (BMC), Medical Faculty, Ludwig-Maximilians Universität Munich, Munich, Germany
| | - Martina Schifferer
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Mikael Simons
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Arthur Liesz
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; Graduate School of Systemic Neurosciences (GSN), Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Natalie Krahmer
- Institute for Diabetes and Obesity, Helmholtz Center Munich and German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | | | - Nicolai Franzmeier
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Suheda Erener
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany
| | - Victor G Puelles
- III. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Hamburg Center for Kidney Health (HCKH), University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Department of Clinical Medicine, Aarhus University, Aarhus, Denmark; Department of Pathology, Aarhus University Hospital, Aarhus, Denmark
| | - Claire Delbridge
- Institute of Pathology, Department of Neuropathology, Technical University Munich, TUM School of Medicine, Munich, Germany
| | - Harsharan Singh Bhatia
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany
| | - Farida Hellal
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Markus Elsner
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany
| | - Ingo Bechmann
- Institute of Anatomy, University of Leipzig, 04109 Leipzig, Germany
| | - Benjamin Ondruschka
- Institute of Legal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Matthias Brendel
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany; Department of Nuclear Medicine, University Hospital, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Fabian J Theis
- Institute of Computational Biology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany; Department of Mathematics, Technische Universität München, Garching bei München, Germany
| | - Ali Erturk
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Center, Neuherberg, Munich, Germany; Institute for Stroke and Dementia Research, LMU University Hospital, Ludwig-Maximilians University Munich, Munich, Germany; Graduate School of Systemic Neurosciences (GSN), Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), Munich, Germany.
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5
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Bhatia HS, Brunner AD, Öztürk F, Kapoor S, Rong Z, Mai H, Thielert M, Ali M, Al-Maskari R, Paetzold JC, Kofler F, Todorov MI, Molbay M, Kolabas ZI, Negwer M, Hoeher L, Steinke H, Dima A, Gupta B, Kaltenecker D, Caliskan ÖS, Brandt D, Krahmer N, Müller S, Lichtenthaler SF, Hellal F, Bechmann I, Menze B, Theis F, Mann M, Ertürk A. Spatial proteomics in three-dimensional intact specimens. Cell 2022; 185:5040-5058.e19. [PMID: 36563667 DOI: 10.1016/j.cell.2022.11.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/13/2022] [Accepted: 11/18/2022] [Indexed: 12/24/2022]
Abstract
Spatial molecular profiling of complex tissues is essential to investigate cellular function in physiological and pathological states. However, methods for molecular analysis of large biological specimens imaged in 3D are lacking. Here, we present DISCO-MS, a technology that combines whole-organ/whole-organism clearing and imaging, deep-learning-based image analysis, robotic tissue extraction, and ultra-high-sensitivity mass spectrometry. DISCO-MS yielded proteome data indistinguishable from uncleared samples in both rodent and human tissues. We used DISCO-MS to investigate microglia activation along axonal tracts after brain injury and characterized early- and late-stage individual amyloid-beta plaques in a mouse model of Alzheimer's disease. DISCO-bot robotic sample extraction enabled us to study the regional heterogeneity of immune cells in intact mouse bodies and aortic plaques in a complete human heart. DISCO-MS enables unbiased proteome analysis of preclinical and clinical tissues after unbiased imaging of entire specimens in 3D, identifying diagnostic and therapeutic opportunities for complex diseases. VIDEO ABSTRACT.
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Affiliation(s)
- Harsharan Singh Bhatia
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany; Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians University Munich, 81377 Munich, Germany
| | - Andreas-David Brunner
- Department for Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, 82152 Martinsried, Germany; Boehringer Ingelheim Pharma GmbH & Co. KG, Drug Discovery Sciences, Birkendorfer Str. 65, D-88400 Biberach Riss, Germany
| | - Furkan Öztürk
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Saketh Kapoor
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Zhouyi Rong
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany; Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians University Munich, 81377 Munich, Germany; Munich Medical Research School (MMRS), 80336 Munich, Germany
| | - Hongcheng Mai
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany; Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians University Munich, 81377 Munich, Germany; Munich Medical Research School (MMRS), 80336 Munich, Germany
| | - Marvin Thielert
- Department for Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, 82152 Martinsried, Germany
| | - Mayar Ali
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany; Graduate School of Neuroscience (GSN), 82152 Munich, Germany
| | - Rami Al-Maskari
- Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians University Munich, 81377 Munich, Germany; Center for Translational Cancer Research (TranslaTUM) of the TUM, 81675 Munich, Germany; Image-Based Biomedical Modeling, Department of Informatics, Technical University of Munich, 85748 Garching, Germany
| | - Johannes Christian Paetzold
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany; Center for Translational Cancer Research (TranslaTUM) of the TUM, 81675 Munich, Germany; Image-Based Biomedical Modeling, Department of Informatics, Technical University of Munich, 85748 Garching, Germany; Biomedical Image Analysis Group, Department of Computing, Imperial College London, London SW7 2AZ, UK
| | - Florian Kofler
- Center for Translational Cancer Research (TranslaTUM) of the TUM, 81675 Munich, Germany; Image-Based Biomedical Modeling, Department of Informatics, Technical University of Munich, 85748 Garching, Germany; Helmholtz AI, Helmholtz Zentrum München, 85764 Neuherberg, Germany; Department of Neuroradiology, Klinikum rechts der Isar, 81675 Munich, Germany
| | - Mihail Ivilinov Todorov
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany; Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians University Munich, 81377 Munich, Germany
| | - Muge Molbay
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany; Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians University Munich, 81377 Munich, Germany; Munich Medical Research School (MMRS), 80336 Munich, Germany
| | - Zeynep Ilgin Kolabas
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany; Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians University Munich, 81377 Munich, Germany; Graduate School of Neuroscience (GSN), 82152 Munich, Germany
| | - Moritz Negwer
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Luciano Hoeher
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Hanno Steinke
- Institute of Anatomy, University of Leipzig, 04109 Leipzig, Germany
| | - Alina Dima
- Center for Translational Cancer Research (TranslaTUM) of the TUM, 81675 Munich, Germany; Image-Based Biomedical Modeling, Department of Informatics, Technical University of Munich, 85748 Garching, Germany
| | - Basavdatta Gupta
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Doris Kaltenecker
- Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians University Munich, 81377 Munich, Germany; Institute for Diabetes and Cancer, Helmholz Zentrum München, 85764 Neuherberg, Germany
| | - Özüm Sehnaz Caliskan
- Institute for Diabetes and Obesity, Helmholz Zentrum München, 85764 Neuherberg, Germany; German Center for Diabetes Research, Helmholz Zentrum München, 85764 Neuherberg, Germany
| | - Daniel Brandt
- Institute for Diabetes and Obesity, Helmholz Zentrum München, 85764 Neuherberg, Germany; German Center for Diabetes Research, Helmholz Zentrum München, 85764 Neuherberg, Germany
| | - Natalie Krahmer
- Institute for Diabetes and Obesity, Helmholz Zentrum München, 85764 Neuherberg, Germany; German Center for Diabetes Research, Helmholz Zentrum München, 85764 Neuherberg, Germany
| | - Stephan Müller
- German Center for Neurodegenerative Diseases (DZNE), 81377 Munich, Germany; Neuroproteomics, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Stefan Frieder Lichtenthaler
- Graduate School of Neuroscience (GSN), 82152 Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), 81377 Munich, Germany; German Center for Neurodegenerative Diseases (DZNE), 81377 Munich, Germany; Neuroproteomics, School of Medicine, Klinikum Rechts der Isar, Technical University of Munich, 81675 Munich, Germany
| | - Farida Hellal
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany; Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians University Munich, 81377 Munich, Germany
| | - Ingo Bechmann
- Institute of Anatomy, University of Leipzig, 04109 Leipzig, Germany
| | - Bjoern Menze
- Center for Translational Cancer Research (TranslaTUM) of the TUM, 81675 Munich, Germany; Image-Based Biomedical Modeling, Department of Informatics, Technical University of Munich, 85748 Garching, Germany; Department for Quantitative Biomedicine, University of Zurich, 8006 Zurich, Switzerland
| | - Fabian Theis
- Institute of Computational Biology, Helmholz Zentrum München, 85764 Neuherberg, Germany; TUM School of Life Sciences Weihenstephan, Technical University of Munich, 85354 Freising, Germany; Department of Mathematics, Technical University of Munich, 85748 Garching, Germany
| | - Matthias Mann
- Department for Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, 82152 Martinsried, Germany; NNF Center for Protein Research, Faculty of Health Sciences, University of Copenhagen, 2200 Copenhagen, Denmark.
| | - Ali Ertürk
- Insititute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, 85764 Neuherberg, Germany; Institute for Stroke and Dementia Research, Klinikum der Universität München, Ludwig-Maximilians University Munich, 81377 Munich, Germany; Graduate School of Neuroscience (GSN), 82152 Munich, Germany; Munich Cluster for Systems Neurology (SyNergy), 81377 Munich, Germany.
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6
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Merino-Serrais P, Plaza-Alonso S, Hellal F, Valero-Freitag S, Kastanauskaite A, Muñoz A, Plesnila N, DeFelipe J. Microanatomical study of pyramidal neurons in the contralesional somatosensory cortex after experimental ischemic stroke. Cereb Cortex 2022; 33:1074-1089. [PMID: 35353195 PMCID: PMC9930620 DOI: 10.1093/cercor/bhac121] [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] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 03/01/2022] [Accepted: 03/02/2022] [Indexed: 11/13/2022] Open
Abstract
At present, many studies support the notion that after stroke, remote regions connected to the infarcted area are also affected and may contribute to functional outcome. In the present study, we have analyzed possible microanatomical alterations in pyramidal neurons from the contralesional hemisphere after induced stroke. We performed intracellular injections of Lucifer yellow in pyramidal neurons from layer III in the somatosensory cortex of the contralesional hemisphere in an ischemic stroke mouse model. A detailed 3-dimensional analysis of the neuronal complexity and morphological alterations of dendritic spines was then performed. Our results demonstrate that pyramidal neurons from layer III in the somatosensory cortex of the contralesional hemisphere show selective changes in their dendritic arbors, namely, less dendritic complexity of the apical dendritic arbor-but no changes in the basal dendritic arbor. In addition, we found differences in spine morphology in both apical and basal dendrites comparing the contralesional hemisphere with the lesional hemisphere. Our results show that pyramidal neurons of remote areas connected to the infarct zone exhibit a series of selective changes in neuronal complexity and morphological distribution of dendritic spines, supporting the hypothesis that remote regions connected to the peri-infarcted area are also affected after stroke.
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Affiliation(s)
- Paula Merino-Serrais
- Corresponding author: Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, Campus Montegancedo S/N, Pozuelo de Alarcón, Madrid 28223/Instituto Cajal (CSIC), Avenida Doctor Arce, 37, Madrid 28002, Spain.
| | - Sergio Plaza-Alonso
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, Madrid 28223, Spain,Departamento de Neurobiología Funcional y de Sistemas, Instituto Cajal, CSIC, Madrid 28002, Spain
| | - Farida Hellal
- Institute for Stroke and Dementia Research (ISD), University of Munich, Munich 81337, Germany,iTERM, Helmholtz center, Munich 85764, Germany
| | - Susana Valero-Freitag
- Institute for Stroke and Dementia Research (ISD), University of Munich, Munich 81337, Germany
| | - Asta Kastanauskaite
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, Madrid 28223, Spain,Departamento de Neurobiología Funcional y de Sistemas, Instituto Cajal, CSIC, Madrid 28002, Spain
| | - Alberto Muñoz
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, Madrid 28223, Spain,Departamento de Neurobiología Funcional y de Sistemas, Instituto Cajal, CSIC, Madrid 28002, Spain,Departamento de Biología Celular, Universidad Complutense, Madrid 28040, Spain
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research (ISD), University of Munich, Munich 81337, Germany,Munich Cluster of Systems Neurology (Synergy), Munich 85764, Germany
| | - Javier DeFelipe
- Laboratorio Cajal de Circuitos Corticales, Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, Madrid 28223, Spain,Departamento de Neurobiología Funcional y de Sistemas, Instituto Cajal, CSIC, Madrid 28002, Spain,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas. (CIBERNED), ISCIII, Madrid 28031, Spain
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7
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Schwarzmaiera SM, Knarr MR, Hu S, Ertürk A, Hellal F, Plesnila N. Perfusion pressure determines vascular integrity and histomorphological quality following perfusion fixation of the brain. J Neurosci Methods 2022; 372:109493. [DOI: 10.1016/j.jneumeth.2022.109493] [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] [Received: 09/03/2021] [Revised: 01/25/2022] [Accepted: 02/03/2022] [Indexed: 10/19/2022]
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8
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Khalin I, Severi C, Heimburger D, Wehn A, Hellal F, Reisch A, Klymchenko AS, Plesnila N. Dynamic tracing using ultra-bright labeling and multi-photon microscopy identifies endothelial uptake of poloxamer 188 coated poly(lactic-co-glycolic acid) nano-carriers in vivo. Nanomedicine 2021; 40:102511. [PMID: 34915181 DOI: 10.1016/j.nano.2021.102511] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 10/18/2021] [Accepted: 11/22/2021] [Indexed: 02/07/2023]
Abstract
The potential of poly(lactic-co-glycolic acid) (PLGA) to design nanoparticles (NPs) and target the central nervous system remains to be exploited. In the current study we designed fluorescent 70-nm PLGA NPs, loaded with bulky fluorophores, thereby making them significantly brighter than quantum dots in single-particle fluorescence measurements. The high brightness of NPs enabled their visualization by intravital real-time 2-photon microscopy. Subsequently, we found that PLGA NPs coated with pluronic F-68 circulated in the blood substantially longer than uncoated NPs and were taken up by cerebro-vascular endothelial cells. Additionally, confocal microscopy revealed that coated PLGA NPs were present in late endothelial endosomes of cerebral vessels within 1 h after systemic injection and were more readily taken up by endothelial cells in peripheral organs. The combination of ultra-bright NPs and in vivo imaging may thus represent a promising approach to reduce the gap between development and clinical application of nanoparticle-based drug carriers.
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Affiliation(s)
- Igor Khalin
- Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München, Munich, Germany; Cluster for Systems Neurology (SyNergy), Munich, Germany.
| | - Caterina Severi
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Faculté de Pharmacie, Illkirch, France
| | - Doriane Heimburger
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Faculté de Pharmacie, Illkirch, France
| | - Antonia Wehn
- Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München, Munich, Germany; Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Farida Hellal
- Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München, Munich, Germany; Cluster for Systems Neurology (SyNergy), Munich, Germany; Institute of Tissue Engineering and Regenerative Medicine (iTERM), Helmholz Zentrum Munich, Neuherberg, Germany
| | - Andreas Reisch
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Faculté de Pharmacie, Illkirch, France.
| | - Andrey S Klymchenko
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Université de Strasbourg, Faculté de Pharmacie, Illkirch, France.
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München, Munich, Germany; Cluster for Systems Neurology (SyNergy), Munich, Germany.
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Wehn AC, Khalin I, Duering M, Hellal F, Culmsee C, Vandenabeele P, Plesnila N, Terpolilli NA. RIPK1 or RIPK3 deletion prevents progressive neuronal cell death and improves memory function after traumatic brain injury. Acta Neuropathol Commun 2021; 9:138. [PMID: 34404478 PMCID: PMC8369637 DOI: 10.1186/s40478-021-01236-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 07/27/2021] [Indexed: 01/02/2023] Open
Abstract
Traumatic brain injury (TBI) causes acute and subacute tissue damage, but is also associated with chronic inflammation and progressive loss of brain tissue months and years after the initial event. The trigger and the subsequent molecular mechanisms causing chronic brain injury after TBI are not well understood. The aim of the current study was therefore to investigate the hypothesis that necroptosis, a form a programmed cell death mediated by the interaction of Receptor Interacting Protein Kinases (RIPK) 1 and 3, is involved in this process. Neuron-specific RIPK1- or RIPK3-deficient mice and their wild-type littermates were subjected to experimental TBI by controlled cortical impact. Posttraumatic brain damage and functional outcome were assessed longitudinally by repetitive magnetic resonance imaging (MRI) and behavioral tests (beam walk, Barnes maze, and tail suspension), respectively, for up to three months after injury. Thereafter, brains were investigated by immunohistochemistry for the necroptotic marker phosphorylated mixed lineage kinase like protein(pMLKL) and activation of astrocytes and microglia. WT mice showed progressive chronic brain damage in cortex and hippocampus and increased levels of pMLKL after TBI. Chronic brain damage occurred almost exclusively in areas with iron deposits and was significantly reduced in RIPK1- or RIPK3-deficient mice by up to 80%. Neuroprotection was accompanied by a reduction of astrocyte and microglia activation and improved memory function. The data of the current study suggest that progressive chronic brain damage and cognitive decline after TBI depend on the expression of RIPK1/3 in neurons. Hence, inhibition of necroptosis signaling may represent a novel therapeutic target for the prevention of chronic post-traumatic brain damage.
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10
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Khalin I, Heimburger D, Melnychuk N, Collot M, Groschup B, Hellal F, Reisch A, Plesnila N, Klymchenko AS. Ultrabright Fluorescent Polymeric Nanoparticles with a Stealth Pluronic Shell for Live Tracking in the Mouse Brain. ACS Nano 2020; 14:9755-9770. [PMID: 32680421 DOI: 10.1021/acsnano.0c01505] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [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: 05/25/2023]
Abstract
Visualizing single organic nanoparticles (NPs) in vivo remains a challenge, which could greatly improve our understanding of the bottlenecks in the field of nanomedicine. To achieve high single-particle fluorescence brightness, we loaded polymer poly(methyl methacrylate)-sulfonate (PMMA-SO3H) NPs with octadecyl rhodamine B together with a bulky hydrophobic counterion (perfluorinated tetraphenylborate) as a fluorophore insulator to prevent aggregation-caused quenching. To create NPs with stealth properties, we used the amphiphilic block copolymers pluronic F-127 and F-68. Fluorescence correlation spectroscopy and Förster resonance energy transfer (FRET) revealed that pluronics remained at the NP surface after dialysis (at one amphiphile per 5.5 nm2) and prevented NPs from nonspecific interactions with serum proteins and surfactants. In primary cultured neurons, pluronics stabilized the NPs, preventing their prompt aggregation and binding to neurons. By increasing dye loading to 20 wt % and optimizing particle size, we obtained 74 nm NPs showing 150-fold higher single-particle brightness with two-photon excitation than commercial Nile Red-loaded FluoSpheres of 39 nm hydrodynamic diameter. The obtained ultrabright pluronic-coated NPs enabled direct single-particle tracking in vessels of mice brains by two-photon intravital microscopy for at least 1 h, whereas noncoated NPs were rapidly eliminated from the circulation. Following brain injury or neuroinflammation, which can open the blood-brain barrier, extravasation of NPs was successfully monitored. Moreover, we demonstrated tracking of individual NPs from meningeal vessels until their uptake by meningeal macrophages. Thus, single NPs can be tracked in animals in real time in vivo in different brain compartments and their dynamics visualized with subcellular resolution.
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Affiliation(s)
- Igor Khalin
- Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München, Feodor-Lynen-Straße 17, D-81377 Munich, Germany
| | - Doriane Heimburger
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Faculté de Pharmacie, Université de Strasbourg, 74, Route du Rhin, 67401 Illkirch, France
| | - Nina Melnychuk
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Faculté de Pharmacie, Université de Strasbourg, 74, Route du Rhin, 67401 Illkirch, France
| | - Mayeul Collot
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Faculté de Pharmacie, Université de Strasbourg, 74, Route du Rhin, 67401 Illkirch, France
| | - Bernhard Groschup
- Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München, Feodor-Lynen-Straße 17, D-81377 Munich, Germany
| | - Farida Hellal
- Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München, Feodor-Lynen-Straße 17, D-81377 Munich, Germany
- Cluster for Systems Neurology (SyNergy), Munich 81377, Germany
| | - Andreas Reisch
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Faculté de Pharmacie, Université de Strasbourg, 74, Route du Rhin, 67401 Illkirch, France
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research (ISD), Klinikum der Universität München, Feodor-Lynen-Straße 17, D-81377 Munich, Germany
- Cluster for Systems Neurology (SyNergy), Munich 81377, Germany
| | - Andrey S Klymchenko
- Laboratoire de Bioimagerie et Pathologies, UMR 7021 CNRS, Faculté de Pharmacie, Université de Strasbourg, 74, Route du Rhin, 67401 Illkirch, France
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11
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Mao X, Terpolilli NA, Wehn A, Cheng S, Hellal F, Liu B, Seker B, Plesnila N. Progressive Histopathological Damage Occurring Up to One Year after Experimental Traumatic Brain Injury Is Associated with Cognitive Decline and Depression-Like Behavior. J Neurotrauma 2020; 37:1331-1341. [DOI: 10.1089/neu.2019.6510] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Xiang Mao
- Institute for Stroke and Dementia Research, Munich University Hospital, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Nicole A. Terpolilli
- Institute for Stroke and Dementia Research, Munich University Hospital, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
- Department of Neurosurgery, Munich University Hospital, Munich, Germany
| | - Antonia Wehn
- Institute for Stroke and Dementia Research, Munich University Hospital, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Shiqi Cheng
- Institute for Stroke and Dementia Research, Munich University Hospital, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Farida Hellal
- Institute for Stroke and Dementia Research, Munich University Hospital, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Baiyun Liu
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University and China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Burcu Seker
- Institute for Stroke and Dementia Research, Munich University Hospital, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research, Munich University Hospital, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
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12
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Bdiri M, Perreault V, Mikhaylin S, Larchet C, Hellal F, Bazinet L, Dammak L. Identification of phenolic compounds and their fouling mechanisms in ion-exchange membranes used at an industrial scale for wine tartaric stabilization by electrodialysis. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.115995] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Lourbopoulos A, Mamrak U, Roth S, Balbi M, Shrouder J, Liesz A, Hellal F, Plesnila N. Inadequate food and water intake determine mortality following stroke in mice. J Cereb Blood Flow Metab 2017; 37:2084-2097. [PMID: 27449604 PMCID: PMC5464703 DOI: 10.1177/0271678x16660986] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [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] [Indexed: 12/20/2022]
Abstract
Experimental stroke models producing clinically relevant functional deficits are often associated with high mortality. Because the mechanisms that underlie post-stroke mortality are largely unknown, results obtained using these models are often difficult to interpret, thereby limiting their translational potential. Given that specific forms of post-stroke care reduce mortality in patients, we hypothesized that inadequate food and water intake may underlie mortality following experimental stroke. C57BL/6 mice were subjected to 1 h of intraluminal filament middle cerebral artery occlusion. Nutritional support beginning on the second day after filament middle cerebral artery occlusion reduced the 14-day mortality rate from 59% to 15%. The surviving mice in the post-stroke support group had the same infarct size as non-surviving control mice, suggesting that post-stroke care was not neuroprotective and that inadequate food and/or water intake are the main reasons for filament middle cerebral artery occlusion-induced mortality. This notion was supported by the presence of significant hypoglycemia, ketonemia, and dehydration in control mice. Taken together, these data suggest that post-filament middle cerebral artery occlusion mortality in mice is not primarily caused by ischemic brain damage, but secondarily by inadequate food and/or water intake. Thus, providing nutritional support following filament middle cerebral artery occlusion greatly minimizes mortality bias and allows the study of long-term morphological and functional sequelae of stroke in mice.
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Affiliation(s)
- Athanasios Lourbopoulos
- 1 Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany
| | - Uta Mamrak
- 1 Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany
| | - Stefan Roth
- 1 Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany
| | - Matilde Balbi
- 1 Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany
| | - Joshua Shrouder
- 1 Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany
| | - Arthur Liesz
- 1 Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany.,2 Munich Cluster for Systems Neurology (Synergy), LMU Munich, Munich, Germany
| | - Farida Hellal
- 1 Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany
| | - Nikolaus Plesnila
- 1 Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany.,2 Munich Cluster for Systems Neurology (Synergy), LMU Munich, Munich, Germany
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14
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Ghosh M, Balbi M, Hellal F, Dichgans M, Lindauer U, Plesnila N. Pericytes are involved in the pathogenesis of cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy. Ann Neurol 2015; 78:887-900. [PMID: 26312599 DOI: 10.1002/ana.24512] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 08/24/2015] [Accepted: 08/24/2015] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL), the most common inherited small-vessel disease, is associated with vascular aggregation of mutant Notch3 protein, dysfunction of cerebral vessels, and dementia. Pericytes, perivascular cells involved in microvascular function, express Notch3. Therefore, we hypothesize that these cells may play a role in the pathogenesis of CADASIL. METHODS Two-, 7-, and 12-month-old CADASIL mutant mice (TgNotch3(R169C) ) and wild-type controls were examined regarding Notch3 aggregation in pericytes, the coverage of cerebral vessels by pericytes, pericyte numbers, capillary density, blood-brain barrier (BBB) integrity, astrocytic end-feet, and the expression of astrocytic gap junction and endothelial adherens junction protein using immunostaining and Western blot analysis. In addition, we examined cerebrovascular CO2 reactivity using laser Doppler fluxmetry and in vivo microscopy. RESULTS With increasing age, mutated Notch3 aggregated around pericytes and smooth muscle cells. Notch3 aggregation caused significant reduction of pericyte number and coverage of capillaries by pericyte processes (p < 0.01). These changes were associated with detachment of astrocytic end-feet from cerebral microvessels, leakage of plasma proteins, reduction in expression of endothelial adherens junction protein, and reduced microvascular reactivity to CO2 . Smooth muscle cells were not affected by Notch3 accumulation. INTERPRETATION Our results show that pericytes are the first cells affected by Notch3 aggregation in CADASIL mice. Pericyte pathology causes opening of the BBB and microvascular dysfunction. Therefore, protecting pericytes may represent a novel therapeutic strategy for vascular dementia.
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Affiliation(s)
- Mitrajit Ghosh
- Institute for Stroke and Dementia Research, University of Munich Medical Center, Ludwig Maximilian University, Munich.,Experimental Neurosurgery, Department of Neurosurgery, Rechts der Isar Hospital, Technical University Munich, Munich.,Munich Cluster for Systems Neurology (SyNergy), Munich
| | - Matilde Balbi
- Institute for Stroke and Dementia Research, University of Munich Medical Center, Ludwig Maximilian University, Munich.,Graduate School of Systemic Neurosciences, Ludwig Maximilian University, Munich
| | - Farida Hellal
- Institute for Stroke and Dementia Research, University of Munich Medical Center, Ludwig Maximilian University, Munich.,Munich Cluster for Systems Neurology (SyNergy), Munich
| | - Martin Dichgans
- Institute for Stroke and Dementia Research, University of Munich Medical Center, Ludwig Maximilian University, Munich.,Munich Cluster for Systems Neurology (SyNergy), Munich
| | - Ute Lindauer
- Experimental Neurosurgery, Department of Neurosurgery, Rechts der Isar Hospital, Technical University Munich, Munich.,Munich Cluster for Systems Neurology (SyNergy), Munich.,Translational Neurosurgery and Neurobiology, Department of Neurosurgery, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research, University of Munich Medical Center, Ludwig Maximilian University, Munich.,Munich Cluster for Systems Neurology (SyNergy), Munich
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15
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Balbi M, Ghosh M, Longden TA, Jativa Vega M, Gesierich B, Hellal F, Lourbopoulos A, Nelson MT, Plesnila N. Dysfunction of mouse cerebral arteries during early aging. J Cereb Blood Flow Metab 2015; 35:1445-53. [PMID: 26058694 PMCID: PMC4640303 DOI: 10.1038/jcbfm.2015.107] [Citation(s) in RCA: 54] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 04/22/2015] [Accepted: 04/23/2015] [Indexed: 11/09/2022]
Abstract
Aging leads to a gradual decline in the fidelity of cerebral blood flow (CBF) responses to neuronal activation, resulting in an increased risk for stroke and dementia. However, it is currently unknown when age-related cerebrovascular dysfunction starts or which vascular components and functions are first affected. The aim of this study was to examine the function of microcirculation throughout aging in mice. Microcirculation was challenged by inhalation of 5% and 10% CO2 or by forepaw stimulation in 6-week, 8-month, and 12-month-old FVB/N mice. The resulting dilation of pial vessels and increase in CBF was measured by intravital fluorescence microscopy and laser Doppler fluxmetry, respectively. Neurovascular coupling and astrocytic endfoot Ca(2+) were measured in acute brain slices from 18-month-old mice. We did not reveal any changes in CBF after CO2 reactivity up to an age of 12 months. However, direct visualization of pial vessels by in vivo microscopy showed a significant, age-dependent loss of CO2 reactivity starting at 8 months of age. At the same age neurovascular coupling was also significantly affected. These results suggest that aging does not affect cerebral vessel function simultaneously, but starts in pial microvessels months before global changes in CBF are detectable.
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Affiliation(s)
- Matilde Balbi
- Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany.,Graduate School of Systemic Neurosciences (GSN), Ludwig-Maximilians University (LMU), Munich, Germany
| | - Mitrajit Ghosh
- Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany
| | - Thomas A Longden
- Department of Pharmacology, University of Vermont, Burlington, Vermont, USA
| | - Max Jativa Vega
- Graduate School of Systemic Neurosciences (GSN), Ludwig-Maximilians University (LMU), Munich, Germany
| | - Benno Gesierich
- Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany
| | - Farida Hellal
- Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany
| | - Athanasios Lourbopoulos
- Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany
| | - Mark T Nelson
- Department of Pharmacology, University of Vermont, Burlington, Vermont, USA
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research (ISD), University of Munich Medical Center, Munich, Germany.,Graduate School of Systemic Neurosciences (GSN), Ludwig-Maximilians University (LMU), Munich, Germany.,Cluster of Systems Neurology (Synergy), Munich, Germany
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16
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Ruschel J, Hellal F, Flynn KC, Dupraz S, Elliott DA, Tedeschi A, Bates M, Sliwinski C, Brook G, Dobrindt K, Peitz M, Brüstle O, Norenberg MD, Blesch A, Weidner N, Bunge MB, Bixby JL, Bradke F. Axonal regeneration. Systemic administration of epothilone B promotes axon regeneration after spinal cord injury. Science 2015; 348:347-52. [PMID: 25765066 DOI: 10.1126/science.aaa2958] [Citation(s) in RCA: 304] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 02/25/2015] [Indexed: 12/14/2022]
Abstract
After central nervous system (CNS) injury, inhibitory factors in the lesion scar and poor axon growth potential prevent axon regeneration. Microtubule stabilization reduces scarring and promotes axon growth. However, the cellular mechanisms of this dual effect remain unclear. Here, delayed systemic administration of a blood-brain barrier-permeable microtubule-stabilizing drug, epothilone B (epoB), decreased scarring after rodent spinal cord injury (SCI) by abrogating polarization and directed migration of scar-forming fibroblasts. Conversely, epothilone B reactivated neuronal polarization by inducing concerted microtubule polymerization into the axon tip, which propelled axon growth through an inhibitory environment. Together, these drug-elicited effects promoted axon regeneration and improved motor function after SCI. With recent clinical approval, epothilones hold promise for clinical use after CNS injury.
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Affiliation(s)
- Jörg Ruschel
- Axonal Growth and Regeneration, German Center for Neurodegenerative Diseases, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
| | - Farida Hellal
- Axonal Growth and Regeneration, German Center for Neurodegenerative Diseases, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
| | - Kevin C Flynn
- Axonal Growth and Regeneration, German Center for Neurodegenerative Diseases, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
| | - Sebastian Dupraz
- Axonal Growth and Regeneration, German Center for Neurodegenerative Diseases, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
| | - David A Elliott
- Axonal Growth and Regeneration, German Center for Neurodegenerative Diseases, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
| | - Andrea Tedeschi
- Axonal Growth and Regeneration, German Center for Neurodegenerative Diseases, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
| | - Margaret Bates
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, 1095 Northwest 14th Terrace, Miami, FL33136, USA
| | - Christopher Sliwinski
- Spinal Cord Injury Center, Heidelberg University Hospital, Schlierbacher Landstr. 200A, 69118 Heidelberg, Germany
| | - Gary Brook
- Institute for Neuropathology, RWTH Aachen University, Steinbergweg 20, 52074, Aachen, Germany. Jülich-Aachen Research Alliance-Translational Brain Medicine
| | - Kristina Dobrindt
- Institute of Reconstructive Neurobiology, Life&Brain Center, University of Bonn and Hertie Foundation, Sigmund-Freud-Strasse 25, 53127 Bonn, Germany
| | - Michael Peitz
- Institute of Reconstructive Neurobiology, Life&Brain Center, University of Bonn and Hertie Foundation, Sigmund-Freud-Strasse 25, 53127 Bonn, Germany
| | - Oliver Brüstle
- Institute of Reconstructive Neurobiology, Life&Brain Center, University of Bonn and Hertie Foundation, Sigmund-Freud-Strasse 25, 53127 Bonn, Germany
| | - Michael D Norenberg
- Departments of Pathology, Biochemistry and Molecular Biology, University of Miami School of Medicine, Miami, FL 33101, USA
| | - Armin Blesch
- Spinal Cord Injury Center, Heidelberg University Hospital, Schlierbacher Landstr. 200A, 69118 Heidelberg, Germany
| | - Norbert Weidner
- Spinal Cord Injury Center, Heidelberg University Hospital, Schlierbacher Landstr. 200A, 69118 Heidelberg, Germany
| | - Mary Bartlett Bunge
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, 1095 Northwest 14th Terrace, Miami, FL33136, USA
| | - John L Bixby
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, 1095 Northwest 14th Terrace, Miami, FL33136, USA
| | - Frank Bradke
- Axonal Growth and Regeneration, German Center for Neurodegenerative Diseases, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany.
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17
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Lourbopoulos A, Ertürk A, Hellal F. Microglia in action: how aging and injury can change the brain's guardians. Front Cell Neurosci 2015; 9:54. [PMID: 25755635 PMCID: PMC4337366 DOI: 10.3389/fncel.2015.00054] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [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: 09/15/2014] [Accepted: 02/03/2015] [Indexed: 01/03/2023] Open
Abstract
Neuroinflammation, the inflammatory response in the central nervous system (CNS), is a major determinant of neuronal function and survival during aging and disease progression. Microglia, as the resident tissue-macrophages of the brain, provide constant support to surrounding neurons in healthy brain. Upon any stress signal (such as trauma, ischemia, inflammation) they are one of the first cells to react. Local and/or peripheral signals determine microglia stress response, which can vary within a continuum of states from beneficial to detrimental for neuronal survival, and can be shaped by aging and previous insults. In this review, we discuss the roles of microglia upon an ischemic or traumatic injury, and give our perspective how aging may contribute to microglia behavior in the injured brain. We speculate that a deeper understanding of specific microglia identities will pave the way to develop more potent therapeutics to treat the diseases of aging brain.
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Affiliation(s)
- Athanasios Lourbopoulos
- Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University of Munich Medical School Munich, Germany
| | - Ali Ertürk
- Laboratory of Acute Brain Injury, Institute for Stroke and Dementia Research (ISD), University of Munich Medical School Munich, Germany
| | - Farida Hellal
- Laboratory of Experimental Stroke Research, Institute for Stroke and Dementia Research (ISD), University of Munich Medical School Munich, Germany
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18
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Belle M, Godefroy D, Dominici C, Heitz-Marchaland C, Zelina P, Hellal F, Bradke F, Chédotal A. A simple method for 3D analysis of immunolabeled axonal tracts in a transparent nervous system. Cell Rep 2014; 9:1191-201. [PMID: 25456121 DOI: 10.1016/j.celrep.2014.10.037] [Citation(s) in RCA: 132] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 10/10/2014] [Accepted: 10/14/2014] [Indexed: 11/16/2022] Open
Abstract
Clearing techniques have been developed to transparentize mouse brains, thereby preserving 3D structure, but their complexity has limited their use. Here, we show that immunolabeling of axonal tracts followed by optical clearing with solvents (3DISCO) and light-sheet microscopy reveals brain connectivity in mouse embryos and postnatal brains. We show that the Robo3 receptor is selectively expressed by medial habenula axons forming the fasciculus retroflexus (FR) and analyzed the development of this commissural tract in mutants of the Slit/Robo and DCC/Netrin pathways. Netrin-1 and DCC are required to attract FR axons to the midline, but the two mutants exhibit specific and heterogeneous axon guidance defects. Moreover, floor-plate-specific deletion of Slit ligands with a conditional Slit2 allele perturbs not only midline crossing by FR axons but also their anteroposterior distribution. In conclusion, this method represents a unique and powerful imaging tool to study axonal connectivity in mutant mice.
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Affiliation(s)
- Morgane Belle
- Sorbonne Universités, UPMC Université Paris 06, UMRS 968, Institut de la Vision, Paris 75012, France; INSERM, UMRS 968, Institut de la Vision, Paris 75012, France; CNRS, UMR 7210, Paris 75012, France
| | - David Godefroy
- Sorbonne Universités, UPMC Université Paris 06, UMRS 968, Institut de la Vision, Paris 75012, France; INSERM, UMRS 968, Institut de la Vision, Paris 75012, France; CNRS, UMR 7210, Paris 75012, France
| | - Chloé Dominici
- Sorbonne Universités, UPMC Université Paris 06, UMRS 968, Institut de la Vision, Paris 75012, France; INSERM, UMRS 968, Institut de la Vision, Paris 75012, France; CNRS, UMR 7210, Paris 75012, France
| | - Céline Heitz-Marchaland
- Sorbonne Universités, UPMC Université Paris 06, UMRS 968, Institut de la Vision, Paris 75012, France; INSERM, UMRS 968, Institut de la Vision, Paris 75012, France; CNRS, UMR 7210, Paris 75012, France
| | - Pavol Zelina
- Sorbonne Universités, UPMC Université Paris 06, UMRS 968, Institut de la Vision, Paris 75012, France; INSERM, UMRS 968, Institut de la Vision, Paris 75012, France; CNRS, UMR 7210, Paris 75012, France
| | - Farida Hellal
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Axon Growth and Regeneration, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
| | - Frank Bradke
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Axon Growth and Regeneration, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
| | - Alain Chédotal
- Sorbonne Universités, UPMC Université Paris 06, UMRS 968, Institut de la Vision, Paris 75012, France; INSERM, UMRS 968, Institut de la Vision, Paris 75012, France; CNRS, UMR 7210, Paris 75012, France.
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19
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Flynn KC, Hellal F, Neukirchen D, Jacob S, Tahirovic S, Dupraz S, Stern S, Garvalov BK, Gurniak C, Shaw AE, Meyn L, Wedlich-Söldner R, Bamburg JR, Small JV, Witke W, Bradke F. ADF/cofilin-mediated actin retrograde flow directs neurite formation in the developing brain. Neuron 2013; 76:1091-107. [PMID: 23259946 DOI: 10.1016/j.neuron.2012.09.038] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/25/2012] [Indexed: 01/17/2023]
Abstract
Neurites are the characteristic structural element of neurons that will initiate brain connectivity and elaborate information. Early in development, neurons are spherical cells but this symmetry is broken through the initial formation of neurites. This fundamental step is thought to rely on actin and microtubule dynamics. However, it is unclear which aspects of the complex actin behavior control neuritogenesis and which molecular mechanisms are involved. Here, we demonstrate that augmented actin retrograde flow and protrusion dynamics facilitate neurite formation. Our data indicate that a single family of actin regulatory proteins, ADF/Cofilin, provides the required control of actin retrograde flow and dynamics to form neurites. In particular, the F-actin severing activity of ADF/Cofilin organizes space for the protrusion and bundling of microtubules, the backbone of neurites. Our data reveal how ADF/Cofilin organizes the cytoskeleton to drive actin retrograde flow and thus break the spherical shape of neurons.
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Affiliation(s)
- Kevin C Flynn
- Max Planck Institute of Neurobiology, Axonal Growth and Regeneration Group, Am Klopferspitz 18, 82152 Martinsried, Germany
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20
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Ertürk A, Mauch CP, Hellal F, Förstner F, Keck T, Becker K, Jährling N, Steffens H, Richter M, Hübener M, Kramer E, Kirchhoff F, Dodt HU, Bradke F. Three-dimensional imaging of the unsectioned adult spinal cord to assess axon regeneration and glial responses after injury. Nat Med 2011; 18:166-71. [PMID: 22198277 DOI: 10.1038/nm.2600] [Citation(s) in RCA: 235] [Impact Index Per Article: 18.1] [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: 12/20/2010] [Accepted: 05/26/2011] [Indexed: 11/09/2022]
Abstract
Studying regeneration in the central nervous system (CNS) is hampered by current histological and imaging techniques because they provide only partial information about axonal and glial reactions. Here we developed a tetrahydrofuran-based clearing procedure that renders fixed and unsectioned adult CNS tissue transparent and fully penetrable for optical imaging. In large spinal cord segments, we imaged fluorescently labeled cells by 'ultramicroscopy' and two-photon microscopy without the need for histological sectioning. We found that more than a year after injury growth-competent axons regenerated abundantly through the injury site. A few growth-incompetent axons could also regenerate when they bypassed the lesion. Moreover, we accurately determined quantitative changes of glial cells after spinal cord injury. Thus, clearing CNS tissue enables an unambiguous evaluation of axon regeneration and glial reactions. Our clearing procedure also renders other organs transparent, which makes this approach useful for a large number of preclinical paradigms.
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Affiliation(s)
- Ali Ertürk
- Max Planck Institute of Neurobiology, Axonal Growth and Regeneration, Martinsried, Germany
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21
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Hellal F, Hurtado A, Ruschel J, Flynn KC, Laskowski CJ, Umlauf M, Kapitein LC, Strikis D, Lemmon V, Bixby J, Hoogenraad CC, Bradke F. Microtubule stabilization reduces scarring and causes axon regeneration after spinal cord injury. Science 2011; 331:928-31. [PMID: 21273450 DOI: 10.1126/science.1201148] [Citation(s) in RCA: 440] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Hypertrophic scarring and poor intrinsic axon growth capacity constitute major obstacles for spinal cord repair. These processes are tightly regulated by microtubule dynamics. Here, moderate microtubule stabilization decreased scar formation after spinal cord injury in rodents through various cellular mechanisms, including dampening of transforming growth factor-β signaling. It prevented accumulation of chondroitin sulfate proteoglycans and rendered the lesion site permissive for axon regeneration of growth-competent sensory neurons. Microtubule stabilization also promoted growth of central nervous system axons of the Raphe-spinal tract and led to functional improvement. Thus, microtubule stabilization reduces fibrotic scarring and enhances the capacity of axons to grow.
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Affiliation(s)
- Farida Hellal
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, Martinsried, Germany
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22
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Tahirovic S, Hellal F, Neukirchen D, Hindges R, Garvalov BK, Flynn KC, Stradal TE, Chrostek-Grashoff A, Brakebusch C, Bradke F. Rac1 regulates neuronal polarization through the WAVE complex. J Neurosci 2010; 30:6930-43. [PMID: 20484635 PMCID: PMC6632643 DOI: 10.1523/jneurosci.5395-09.2010] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [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: 10/30/2009] [Revised: 03/30/2010] [Accepted: 04/03/2010] [Indexed: 11/21/2022] Open
Abstract
Neuronal migration and axon growth, key events during neuronal development, require distinct changes in the cytoskeleton. Although many molecular regulators of polarity have been identified and characterized, relatively little is known about their physiological role in this process. To study the physiological function of Rac1 in neuronal development, we have generated a conditional knock-out mouse, in which Rac1 is ablated in the whole brain. Rac1-deficient cerebellar granule neurons, which do not express other Rac isoforms, showed impaired neuronal migration and axon formation both in vivo and in vitro. In addition, Rac1 ablation disrupts lamellipodia formation in growth cones. The analysis of Rac1 effectors revealed the absence of the Wiskott-Aldrich syndrome protein (WASP) family verprolin-homologous protein (WAVE) complex from the plasma membrane of knock-out growth cones. Loss of WAVE function inhibited axon growth, whereas overexpression of a membrane-tethered WAVE mutant partially rescued axon growth in Rac1-knock-out neurons. In addition, pharmacological inhibition of the WAVE complex effector Arp2/3 also reduced axon growth. We propose that Rac1 recruits the WAVE complex to the plasma membrane to enable actin remodeling necessary for axon growth.
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Affiliation(s)
- Sabina Tahirovic
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Farida Hellal
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Dorothee Neukirchen
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Robert Hindges
- Medical Research Council Centre for Developmental Neurobiology, King's College London, London SE1 1UL, United Kingdom
| | - Boyan K. Garvalov
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Kevin C. Flynn
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
| | - Theresia E. Stradal
- Signalling and Motility Group, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany
| | - Anna Chrostek-Grashoff
- Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia 22908, and
| | - Cord Brakebusch
- Biotech Research and Innovation Centre, Biomedical Institute, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Frank Bradke
- Axonal Growth and Regeneration Group, Max Planck Institute of Neurobiology, 82152 Martinsried, Germany
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23
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Ylera B, Ertürk A, Hellal F, Nadrigny F, Hurtado A, Tahirovic S, Oudega M, Kirchhoff F, Bradke F. Chronically CNS-injured adult sensory neurons gain regenerative competence upon a lesion of their peripheral axon. Curr Biol 2009; 19:930-6. [PMID: 19409789 DOI: 10.1016/j.cub.2009.04.017] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.3] [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: 09/12/2008] [Revised: 04/01/2009] [Accepted: 04/02/2009] [Indexed: 01/16/2023]
Abstract
Several experimental manipulations result in axonal regeneration in the central nervous system (CNS) when applied before or at the time of injury but not when initiated after a delay, which would be clinically more relevant. As centrally injured neurons show signs of atrophy and degeneration, it raises the question whether chronically injured neurons are able to regenerate. To address this question, we used adult rodent primary sensory neurons that regenerate their central axon when their peripheral axon is cut (called conditioning) beforehand but not afterwards. We found that primary sensory neurons express regeneration-associated genes and efficiently regrow their axon in cell culture two months after a central lesion upon conditioning. Moreover, conditioning enables central axons to regenerate through a fresh lesion independent of a previous central lesion. Using in vivo imaging we demonstrated that conditioned neurons rapidly regrow their axons through a fresh central lesion. Finally, when single sensory axons were cut with a two-photon laser, they robustly regenerate within days after attaining growth competence through conditioning. We conclude that sensory neurons can acquire the intrinsic potential to regenerate their axons months after a CNS lesion, which they implement in the absence of traumatic tissue.
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Affiliation(s)
- Bhavna Ylera
- Axonal Growth and Regeneration, Max Planck Institute of Neurobiology, Am Klopferspitz 18, 82152 Martinsried, Germany
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Ertürk A, Hellal F, Enes J, Bradke F. Disorganized microtubules underlie the formation of retraction bulbs and the failure of axonal regeneration. J Neurosci 2007; 27:9169-80. [PMID: 17715353 PMCID: PMC6672197 DOI: 10.1523/jneurosci.0612-07.2007] [Citation(s) in RCA: 300] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Axons in the CNS do not regrow after injury, whereas lesioned axons in the peripheral nervous system (PNS) regenerate. Lesioned CNS axons form characteristic swellings at their tips known as retraction bulbs, which are the nongrowing counterparts of growth cones. Although much progress has been made in identifying intracellular and molecular mechanisms that regulate growth cone locomotion and axonal elongation, a comprehensive understanding of how retraction bulbs form and why they are unable to grow is still elusive. Here we report the analysis of the morphological and intracellular responses of injured axons in the CNS compared with those in the PNS. We show that retraction bulbs of injured CNS axons increase in size over time, whereas growth cones of injured PNS axons remain constant. Retraction bulbs contain a disorganized microtubule network, whereas growth cones possess the typical bundling of microtubules. Using in vivo imaging, we find that pharmacological disruption of microtubules in growth cones transforms them into retraction bulb-like structures whose growth is inhibited. Correspondingly, microtubule destabilization of sensory neurons in cell culture induces retraction bulb formation. Conversely, microtubule stabilization prevents the formation of retraction bulbs and decreases axonal degeneration in vivo. Finally, microtubule stabilization enhances the growth capacity of CNS neurons cultured on myelin. Thus, the stability and organization of microtubules define the fate of lesioned axonal stumps to become either advancing growth cones or nongrowing retraction bulbs. Our data pinpoint microtubules as a key regulatory target for axonal regeneration.
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Affiliation(s)
- Ali Ertürk
- Max-Planck Institute of Neurobiology, Axonal Growth and Regeneration, 82152 Martinsried, Germany
| | - Farida Hellal
- Max-Planck Institute of Neurobiology, Axonal Growth and Regeneration, 82152 Martinsried, Germany
| | - Joana Enes
- Max-Planck Institute of Neurobiology, Axonal Growth and Regeneration, 82152 Martinsried, Germany
| | - Frank Bradke
- Max-Planck Institute of Neurobiology, Axonal Growth and Regeneration, 82152 Martinsried, Germany
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Ongali B, Hellal F, Rodi D, Plotkine M, Marchand-Verrecchia C, Pruneau D, Couture R. Autoradiographic Analysis of Mouse Brain Kinin B1 and B2 Receptors after Closed Head Trauma and Ability of Anatibant Mesylate to Cross the Blood–Brain Barrier. J Neurotrauma 2006; 23:696-707. [PMID: 16689671 DOI: 10.1089/neu.2006.23.696] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The potent non-peptide B2 receptor (R) antagonist, Anatibant mesylate (Ms) (LF 16-0687 Ms), reduces brain edema and improves neurological function recovery in various focal and diffuse models of traumatic brain injury in rodents. In the present study, alteration of kinin B1 and B2R after closed head trauma (CHT) and in vivo binding properties of Anatibant Ms (3 mg/kg, s.c.) injected 30 min after CHT were studied in mice by autoradiography using the radioligands [125I]HPP-Hoe 140 (B2R), and [125I]HPP-des-Arg10-Hoe 140 (B1R). Whereas B1R is barely detected in most brain regions, B2R is extensively distributed, displaying the highest densities in the hindbrain. CHT was associated with a slight increase of B1R and a decrease of B2R (10-50%) in several brain regions. Anatibant Ms (Ki = 22 pM) displaced the B2R radioligand from its binding sites in several areas of the forebrain, basal ganglia and hindbrain. Displacement was achieved in 1 h and persisted at 4 h post-injection. The inhibition did not exceed 50% of the total specific binding in non-injured mice. After CHT, the displacement by Anatibant Ms was higher and almost complete in the cortex, caudate putamen, thalamus, hippocampus, medial geniculate nucleus, ventral tegmental area, and raphe. Evans blue extravasation in brain tissue at 4 h after CHT was abolished by Anatibant Ms. It appeared that Anatibant Ms penetrated into the brain in sufficient amounts, particularly after disruption of the blood-brain barrier, to account for its B2R-mediated neuro- and vascular protective effects. The diminished binding of B2R after CHT may reflect the occupancy or internalization of B2R following the endogenous production of bradykinin (BK).
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Affiliation(s)
- Brice Ongali
- Département de Physiologie, Faculté de Médecine, Université de Montréal, Montréal, Québec, Canada
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El Ati-Hellal M, Hedhili A, Hellal F, Boujlel K, Dachraoui M, Bousnina M, Ghorbel H, Ndhif M. Lead and cadmium concentrations in seawater and algae of the Tunisian coast. Arch Inst Pasteur Tunis 2005; 82:75-82. [PMID: 16929758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Both lead and cadmium are toxic trace metals, even in very weak concentrations. The aim of this study was to estimate lead and cadmium pollution in various sites of the Tunisian coast and to verify the possibility of modification of the algae bioconcentration power according to water physico-chemical conditions. Our study concerned 99 samples of algae and 99 samples of seawater, taken in different sites of the Tunisian littoral. The analysis was realized by atomic absorption spectrophotometry (oven graphite). In algae, Sfax site presented the highest concentrations of lead when Sousse site showed the lowest ones. In seawater, the most amounts of lead were observed in Bizerte, Mahdia and Sfax sites, and those of cadmium in Bizerte and Medenine coasts. Bizerte's coast seems to be the most exposed zone to pollution. Indeed, the intensification of sea traffic may take place on this pollution because hydrocarbons derived from petroleum contain some tetraethylic lead characterised by its great toxicity. Sousse's region is the least polluted zone; it might be due to the development of tourism and a strict regulation of pollution in this district.
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Affiliation(s)
- M El Ati-Hellal
- Faculty of Sciences, Department of Chemistry, Tunis, Tunisia.
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Hellal F, Bonnefont-Rousselot D, Croci N, Palmier B, Plotkine M, Marchand-Verrecchia C. Pattern of cerebral edema and hemorrhage in a mice model of diffuse brain injury. Neurosci Lett 2004; 357:21-4. [PMID: 15036604 DOI: 10.1016/j.neulet.2003.12.036] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [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: 08/28/2003] [Revised: 12/01/2003] [Accepted: 12/01/2003] [Indexed: 11/27/2022]
Abstract
This study aims to examine the time course of the brain edema formation in relation with blood-brain barrier (BBB) disruption and cerebral hemorrhage in a murine model of diffuse brain injury. Brain water content increased at 1 h post-injury and persisted up to 7 days. This event was associated with electrolyte imbalance such as Na(+) increase within 24 h. Prominent Evans blue extravasation was also observed from 1 to 6 h post-injury. Concurrently, hemoglobin increased markedly by 1 h, reached a peak at 4 h and declined progressively within a week in association with a rise of parenchyma iron content between 24 h and 7 days. These results suggest that brain edema is vasogenic and that the hemorrhage process is involved in the BBB disruption and edema, both leading to post-traumatic secondary events.
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Affiliation(s)
- F Hellal
- UPRES EA2510, Laboratoire de Pharmacologie, Université René Descartes, 4 avenue de l'Observatoire, F-75006 Paris, France
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Hellal F, Pruneau D, Palmier B, Faye P, Croci N, Plotkine M, Marchand-Verrecchia C. Detrimental Role of Bradykinin B2 Receptor in a Murine Model of Diffuse Brain Injury. J Neurotrauma 2003; 20:841-51. [PMID: 14577862 DOI: 10.1089/089771503322385773] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [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: 12/29/2022] Open
Abstract
Inhibition of the bradykinin B2 receptor type (B2R) has been shown to improve neurological outcome in models of focal traumatic brain injury. However, the involvement of B2R in trauma-induced diffuse injury has not yet been explored. This is an important point, since in humans a pattern of diffuse injury is commonly found in severely injured patients and has been associated with a poor neurological outcome and prognosis. Using the non-peptide B2R antagonist LF 16-0687 Ms and B2R null (B2R-/-) mice, we investigated the role of B2R in a model of closed head trauma (CHT). LF 16-0687 Ms given 30 min after injury reduced the neurological deficit by 26% and the cerebral edema by 22% when evaluated 4 h after CHT. Neurological function after CHT was improved in B2R-/- mice compared to B2R+/+ mice, although there was no difference in the development of brain edema. Treatment with LF 16-0687 Ms and B(2)R gene deletion decreased the accumulation of neutrophils at 24 h after CHT (50% and 36%, respectively). In addition, the inducible NO synthase (iNOS) mRNA level increased markedly, and this was reduced by LF 16-0687 Ms. Taken together, these data support a detrimental role of B2R in the development of the neurological deficit and of the inflammatory secondary damage resulting from diffuse traumatic brain injury. Therefore, blockade of bradykinin B2 receptors might represent an attractive therapeutic approach in the pharmacological treatment of traumatic brain injury.
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Affiliation(s)
- F Hellal
- UPRES EA2510, Laboratoire de Pharmacologie, Université René Descartes, 4 avenue de l'Observatoire, F-75006 Paris, France
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Hellal F, Benna M, Medimagh MS. Application of Doehlert matrix to the study of Cr (III) precipitation in the waste waters from tanning baths. ACTA ACUST UNITED AC 1998. [DOI: 10.1080/00207239808711166] [Citation(s) in RCA: 2] [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: 10/23/2022]
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Hellal F, Phan-Tan-Luu R, Siouffi AM. Application of Solvatochromic Parameters to Selectivity Tuning in Chromatography for Aromatic Solutes. ACTA ACUST UNITED AC 1994. [DOI: 10.1080/10826079408013504] [Citation(s) in RCA: 3] [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: 10/23/2022]
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