1
|
Baum ML, Bartley CM. Human-derived monoclonal autoantibodies as interrogators of cellular proteotypes in the brain. Trends Neurosci 2024; 47:753-765. [PMID: 39242246 DOI: 10.1016/j.tins.2024.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2024] [Revised: 07/01/2024] [Accepted: 08/08/2024] [Indexed: 09/09/2024]
Abstract
A major aim of neuroscience is to identify and model the functional properties of neural cells whose dysfunction underlie neuropsychiatric illness. In this article, we propose that human-derived monoclonal autoantibodies (HD-mAbs) are well positioned to selectively target and manipulate neural subpopulations as defined by their protein expression; that is, cellular proteotypes. Recent technical advances allow for efficient cloning of autoantibodies from neuropsychiatric patients. These HD-mAbs can be introduced into animal models to gain biological and pathobiological insights about neural proteotypes of interest. Protein engineering can be used to modify, enhance, silence, or confer new functional properties to native HD-mAbs, thereby enhancing their versatility. Finally, we discuss the challenges and limitations confronting HD-mAbs as experimental research tools for neuroscience.
Collapse
Affiliation(s)
- Matthew L Baum
- Brigham and Women's Hospital, Department of Psychiatry, Boston, MA, USA; Harvard Medical School, Department of Psychiatry, Boston, MA, USA
| | - Christopher M Bartley
- Translational Immunopsychiatry Unit, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA.
| |
Collapse
|
2
|
Liew F, Efstathiou C, Fontanella S, Richardson M, Saunders R, Swieboda D, Sidhu JK, Ascough S, Moore SC, Mohamed N, Nunag J, King C, Leavy OC, Elneima O, McAuley HJC, Shikotra A, Singapuri A, Sereno M, Harris VC, Houchen-Wolloff L, Greening NJ, Lone NI, Thorpe M, Thompson AAR, Rowland-Jones SL, Docherty AB, Chalmers JD, Ho LP, Horsley A, Raman B, Poinasamy K, Marks M, Kon OM, Howard LS, Wootton DG, Quint JK, de Silva TI, Ho A, Chiu C, Harrison EM, Greenhalf W, Baillie JK, Semple MG, Turtle L, Evans RA, Wain LV, Brightling C, Thwaites RS, Openshaw PJM. Large-scale phenotyping of patients with long COVID post-hospitalization reveals mechanistic subtypes of disease. Nat Immunol 2024; 25:607-621. [PMID: 38589621 PMCID: PMC11003868 DOI: 10.1038/s41590-024-01778-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 02/06/2024] [Indexed: 04/10/2024]
Abstract
One in ten severe acute respiratory syndrome coronavirus 2 infections result in prolonged symptoms termed long coronavirus disease (COVID), yet disease phenotypes and mechanisms are poorly understood1. Here we profiled 368 plasma proteins in 657 participants ≥3 months following hospitalization. Of these, 426 had at least one long COVID symptom and 233 had fully recovered. Elevated markers of myeloid inflammation and complement activation were associated with long COVID. IL-1R2, MATN2 and COLEC12 were associated with cardiorespiratory symptoms, fatigue and anxiety/depression; MATN2, CSF3 and C1QA were elevated in gastrointestinal symptoms and C1QA was elevated in cognitive impairment. Additional markers of alterations in nerve tissue repair (SPON-1 and NFASC) were elevated in those with cognitive impairment and SCG3, suggestive of brain-gut axis disturbance, was elevated in gastrointestinal symptoms. Severe acute respiratory syndrome coronavirus 2-specific immunoglobulin G (IgG) was persistently elevated in some individuals with long COVID, but virus was not detected in sputum. Analysis of inflammatory markers in nasal fluids showed no association with symptoms. Our study aimed to understand inflammatory processes that underlie long COVID and was not designed for biomarker discovery. Our findings suggest that specific inflammatory pathways related to tissue damage are implicated in subtypes of long COVID, which might be targeted in future therapeutic trials.
Collapse
Affiliation(s)
- Felicity Liew
- National Heart and Lung Institute, Imperial College London, London, UK
| | | | - Sara Fontanella
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Matthew Richardson
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Ruth Saunders
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Dawid Swieboda
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Jasmin K Sidhu
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Stephanie Ascough
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Shona C Moore
- NIHR Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - Noura Mohamed
- The Imperial Clinical Respiratory Research Unit, Imperial College NHS Trust, London, UK
| | - Jose Nunag
- Cardiovascular Research Team, Imperial College Healthcare NHS Trust, London, UK
| | - Clara King
- Cardiovascular Research Team, Imperial College Healthcare NHS Trust, London, UK
| | - Olivia C Leavy
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
- Department of Population Health Sciences, University of Leicester, Leicester, UK
| | - Omer Elneima
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Hamish J C McAuley
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Aarti Shikotra
- NIHR Leicester Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Amisha Singapuri
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Marco Sereno
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Victoria C Harris
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Linzy Houchen-Wolloff
- Centre for Exercise and Rehabilitation Science, NIHR Leicester Biomedical Research Centre-Respiratory, University of Leicester, Leicester, UK
| | - Neil J Greening
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Nazir I Lone
- Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Matthew Thorpe
- Centre for Medical Informatics, The Usher Institute, University of Edinburgh, Edinburgh, UK
| | - A A Roger Thompson
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
| | - Sarah L Rowland-Jones
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
| | - Annemarie B Docherty
- Centre for Medical Informatics, The Usher Institute, University of Edinburgh, Edinburgh, UK
| | - James D Chalmers
- University of Dundee, Ninewells Hospital and Medical School, Dundee, UK
| | - Ling-Pei Ho
- MRC Human Immunology Unit, University of Oxford, Oxford, UK
| | - Alexander Horsley
- Division of Infection, Immunity and Respiratory Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Betty Raman
- Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | | | - Michael Marks
- Department of Clinical Research, London School of Hygiene and Tropical Medicine, London, UK
- Hospital for Tropical Diseases, University College London Hospital, London, UK
- Division of Infection and Immunity, University College London, London, UK
| | - Onn Min Kon
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Luke S Howard
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Daniel G Wootton
- NIHR Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - Jennifer K Quint
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Thushan I de Silva
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
| | - Antonia Ho
- MRC Centre for Virus Research, School of Infection and Immunity, University of Glasgow, Glasgow, UK
| | - Christopher Chiu
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Ewen M Harrison
- Centre for Medical Informatics, The Usher Institute, University of Edinburgh, Edinburgh, UK
| | - William Greenhalf
- Institute of Systems, Molecular and Integrative Biology, University of Liverpool, Liverpool, UK
| | - J Kenneth Baillie
- Centre for Medical Informatics, The Usher Institute, University of Edinburgh, Edinburgh, UK
- The Roslin Institute, University of Edinburgh, Edinburgh, UK
- Pandemic Science Hub, University of Edinburgh, Edinburgh, UK
| | - Malcolm G Semple
- NIHR Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
- The Pandemic Institute, University of Liverpool, Liverpool, UK
| | - Lance Turtle
- NIHR Health Protection Research Unit in Emerging and Zoonotic Infections, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
- The Pandemic Institute, University of Liverpool, Liverpool, UK
| | - Rachael A Evans
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Louise V Wain
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
- Department of Population Health Sciences, University of Leicester, Leicester, UK
| | - Christopher Brightling
- Institute for Lung Health, Leicester NIHR Biomedical Research Centre, University of Leicester, Leicester, UK
| | - Ryan S Thwaites
- National Heart and Lung Institute, Imperial College London, London, UK.
| | | |
Collapse
|
3
|
CIDP-like autoimmune nodopathy complicated with focal segmental glomerulosclerosis: a case study and literature review. J Neurol 2023; 270:493-502. [PMID: 36178542 DOI: 10.1007/s00415-022-11369-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/30/2022] [Accepted: 09/01/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND This study aimed to investigate the role of neurofascin186 (NF186) in the pathogenesis of the concurrent focal segmental glomerulosclerosis (FSGS) in CIDP-like autoimmune nodopathy patients. METHODS We presented a case of CIDP-like autoimmune nodopathy complicated with FSGS. We measured NF186 antibodies by cell-binding assay (CBA) method. We performed immunofluorescence analysis in the renal cryosection samples from a patient with minimal nephropathy with rabbit anti-NF186 antibody or NF186 antibody positive human serum. Then we performed western blotting of recombinant NF186 protein and component of NF186 including Ig and FNIII domains incubating with human serum and corresponding rabbit polyclonal antibody. Cases of CIDP complicated with FSGS were searched form PubMed and reviewed. RESULTS We reported a 66-year-old Chinese woman with CIDP-like autoimmune nodopathy and concurrent FSGS. Her NF186 antibody was positive. The fluorescent signal for NF186 was detected in the renal tissue sections of the patient with minimal nephropathy. The staining for NF186 matched the podocyte spatially. In western blotting analysis, patients had antibodies in their serum recognizing the NF186 protein and their antibodies recognized the Ig domain of NF186. 3 cases of CIDP-like autoimmune nodopathy with positive NF186 antibody and FSGS have been reported. All these patients were responsive to corticosteroids rather than the intravenous immunoglobulin, in terms of both the neuropathy and renal disease. CONCLUSIONS NF186 was probably a targeted antigen in the pathogenesis of concurrent FSGS in CIDP-like autoimmune nodopathy with positive NF186 antibody. CIDP-like autoimmune nodopathy with positive NF186 antibody and FSGS is a rare entity, which may be responsive to corticosteroids combined with immunosuppressant.
Collapse
|
4
|
Chataigner LMP, Gogou C, den Boer MA, Frias CP, Thies-Weesie DME, Granneman JCM, Heck AJR, Meijer DH, Janssen BJC. Structural insights into the contactin 1 - neurofascin 155 adhesion complex. Nat Commun 2022; 13:6607. [PMID: 36329006 PMCID: PMC9633819 DOI: 10.1038/s41467-022-34302-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 10/20/2022] [Indexed: 11/06/2022] Open
Abstract
Cell-surface expressed contactin 1 and neurofascin 155 control wiring of the nervous system and interact across cells to form and maintain paranodal myelin-axon junctions. The molecular mechanism of contactin 1 - neurofascin 155 adhesion complex formation is unresolved. Crystallographic structures of complexed and individual contactin 1 and neurofascin 155 binding regions presented here, provide a rich picture of how competing and complementary interfaces, post-translational glycosylation, splice differences and structural plasticity enable formation of diverse adhesion sites. Structural, biophysical, and cell-clustering analysis reveal how conserved Ig1-2 interfaces form competing heterophilic contactin 1 - neurofascin 155 and homophilic neurofascin 155 complexes whereas contactin 1 forms low-affinity clusters through interfaces on Ig3-6. The structures explain how the heterophilic Ig1-Ig4 horseshoe's in the contactin 1 - neurofascin 155 complex define the 7.4 nm paranodal spacing and how the remaining six domains enable bridging of distinct intercellular distances.
Collapse
Affiliation(s)
- Lucas M. P. Chataigner
- grid.5477.10000000120346234Structural Biochemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Christos Gogou
- grid.5292.c0000 0001 2097 4740Department of Bionanoscience, Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Maurits A. den Boer
- grid.5477.10000000120346234Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands ,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Cátia P. Frias
- grid.5292.c0000 0001 2097 4740Department of Bionanoscience, Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Dominique M. E. Thies-Weesie
- grid.5477.10000000120346234Van’t Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute of Nanomaterials Science, Department of Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Joke C. M. Granneman
- grid.5477.10000000120346234Structural Biochemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Albert J. R. Heck
- grid.5477.10000000120346234Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands ,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Dimphna H. Meijer
- grid.5292.c0000 0001 2097 4740Department of Bionanoscience, Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Bert J. C. Janssen
- grid.5477.10000000120346234Structural Biochemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| |
Collapse
|
5
|
Gupta N, Shirani A, Arcot Jayagopal L, Piccione E, Hartman E, Zabad RK. Anti-Neurofascin Antibodies Associated with White Matter Diseases of the Central Nervous System: A Red Flag or a Red Herring? Brain Sci 2022; 12:brainsci12091124. [PMID: 36138860 PMCID: PMC9497231 DOI: 10.3390/brainsci12091124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/13/2022] [Accepted: 08/16/2022] [Indexed: 12/02/2022] Open
Abstract
Autoantibodies against nodal and paranodal proteins, specifically anti-neurofascin antibodies (ANFAs), have been recently described in central and peripheral nervous system demyelinating disorders. We retrospectively reviewed the charts of six individuals evaluated at our Multiple Sclerosis Program who tested positive for serum ANFAs on Western blot. We describe these patients’ clinical and diagnostic findings and attempt to identify features that might guide clinicians in checking for ANFAs. In our series, the women-to-men ratio was 2:1. At presentation, the median age was 60 years (range 30–70). The clinical presentation was pleiotropic and included incomplete transverse myelitis (n = 3), progressive myelopathy (n = 1), recurrent symmetric polyneuropathy (n = 1), and nonspecific neurological symptoms (n = 1). Atypical features prompting further workup included coexisting upper and lower motor neuron features, older age at presentation with active disease, atypical spinal cord MRI features, and unusual cerebrospinal fluid findings. The serum ANFAs panel was positive for the NF-155 isoform in five patients (IgM n = 2; IgG n = 2; both n = 1) and the NF-140 isoform in two (IgG n = 2). Larger studies are needed to assess the relevance of ANFAs in demyelinating nervous system diseases, their impact on long-term clinical outcomes, and associated therapeutic implications.
Collapse
|
6
|
He L, Jiang W, Li J, Wang C. Crystal structure of Ankyrin-G in complex with a fragment of Neurofascin reveals binding mechanisms required for integrity of the axon initial segment. J Biol Chem 2022; 298:102272. [PMID: 35850303 PMCID: PMC9396398 DOI: 10.1016/j.jbc.2022.102272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 07/12/2022] [Accepted: 07/13/2022] [Indexed: 11/23/2022] Open
Abstract
The axon initial segment (AIS) has characteristically dense clustering of voltage-gated sodium channels (Nav), cell adhesion molecule Neurofascin 186 (Nfasc), and neuronal scaffold protein Ankyrin-G (AnkG) in neurons, which facilitates generation of an action potential and maintenance of axonal polarity. However, the mechanisms underlying AIS assembly, maintenance, and plasticity remain poorly understood. Here, we report the high-resolution crystal structure of the AnkG ankyrin repeat (ANK repeat) domain in complex with its binding site in the Nfasc cytoplasmic tail that shows, in conjunction with binding affinity assays with serial truncation variants, the molecular basis of AnkG–Nfasc binding. We confirm AnkG interacts with the FIGQY motif in Nfasc, and we identify another region required for their high affinity binding. Our structural analysis revealed that ANK repeats form 4 hydrophobic or hydrophilic layers in the AnkG inner groove that coordinate interactions with essential Nfasc residues, including F1202, E1204, and Y1212. Moreover, we show disruption of the AnkG–Nfasc complex abolishes Nfasc enrichment at the AIS in cultured mouse hippocampal neurons. Finally, our structural and biochemical analysis indicated that L1 syndrome-associated mutations in L1CAM, a member of the L1 immunoglobulin family proteins including Nfasc, L1CAM, NrCAM, and CHL1, compromise binding with ankyrins. Taken together, these results define the mechanisms underlying AnkG–Nfasc complex formation and show that AnkG-dependent clustering of Nfasc is required for AIS integrity.
Collapse
Affiliation(s)
- Liping He
- Department of Neurology, The First Affiliated Hospital of USTC, Ministry of Education Key Laboratory for Cellular Dynamics, Hefei National Research Center for Physical Sciences at the Microscale, Biomedical Sciences and Health Laboratory of Anhui Province, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, P. R. China
| | - Wenli Jiang
- Department of Neurology, The First Affiliated Hospital of USTC, Ministry of Education Key Laboratory for Cellular Dynamics, Hefei National Research Center for Physical Sciences at the Microscale, Biomedical Sciences and Health Laboratory of Anhui Province, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, P. R. China
| | - Jianchao Li
- Division of Cell, Developmental and Integrative Biology, School of Medicine, South China University of Technology, Guangzhou, P. R. China.
| | - Chao Wang
- Department of Neurology, The First Affiliated Hospital of USTC, Ministry of Education Key Laboratory for Cellular Dynamics, Hefei National Research Center for Physical Sciences at the Microscale, Biomedical Sciences and Health Laboratory of Anhui Province, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, P. R. China.
| |
Collapse
|
7
|
Pantazopoulos H, Hossain NM, Chelini G, Durning P, Barbas H, Zikopoulos B, Berretta S. Chondroitin Sulphate Proteoglycan Axonal Coats in the Human Mediodorsal Thalamic Nucleus. Front Integr Neurosci 2022; 16:934764. [PMID: 35875507 PMCID: PMC9298528 DOI: 10.3389/fnint.2022.934764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 06/21/2022] [Indexed: 12/21/2022] Open
Abstract
Mounting evidence supports a key involvement of the chondroitin sulfate proteoglycans (CSPGs) NG2 and brevican (BCAN) in the regulation of axonal functions, including axon guidance, fasciculation, conductance, and myelination. Prior work suggested the possibility that these functions may, at least in part, be carried out by specialized CSPG structures surrounding axons, termed axonal coats. However, their existence remains controversial. We tested the hypothesis that NG2 and BCAN, known to be associated with oligodendrocyte precursor cells, form axonal coats enveloping myelinated axons in the human brain. In tissue blocks containing the mediodorsal thalamic nucleus (MD) from healthy donors (n = 5), we used dual immunofluorescence, confocal microscopy, and unbiased stereology to characterize BCAN and NG2 immunoreactive (IR) axonal coats and measure the percentage of myelinated axons associated with them. In a subset of donors (n = 3), we used electron microscopy to analyze the spatial relationship between axons and NG2- and BCAN-IR axonal coats within the human MD. Our results show that a substantial percentage (∼64%) of large and medium myelinated axons in the human MD are surrounded by NG2- and BCAN-IR axonal coats. Electron microscopy studies show NG2- and BCAN-IR axonal coats are interleaved with myelin sheets, with larger axons displaying greater association with axonal coats. These findings represent the first characterization of NG2 and BCAN axonal coats in the human brain. The large percentage of axons surrounded by CSPG coats, and the role of CSPGs in axonal guidance, fasciculation, conductance, and myelination suggest that these structures may contribute to several key axonal properties.
Collapse
Affiliation(s)
- Harry Pantazopoulos
- Department of Psychiatry and Program in Neuroscience, University of Mississippi Medical Center, Jackson, MS, United States
| | | | - Gabriele Chelini
- Translational Neuroscience Laboratory, Mclean Hospital, Belmont, MA, United States
- Department of Psychiatry, Harvard Medical School, Boston, MA, United States
| | - Peter Durning
- Translational Neuroscience Laboratory, Mclean Hospital, Belmont, MA, United States
| | - Helen Barbas
- Department of Health Sciences, Boston University, Boston, MA, United States
- Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, MA, United States
- Neural Systems Laboratory, Boston University, Boston, MA, United States
| | - Basilis Zikopoulos
- Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, MA, United States
- Neural Systems Laboratory, Boston University, Boston, MA, United States
| | - Sabina Berretta
- Translational Neuroscience Laboratory, Mclean Hospital, Belmont, MA, United States
- Department of Psychiatry, Harvard Medical School, Boston, MA, United States
- Program in Neuroscience, Harvard Medical School, Boston, MA, United States
- *Correspondence: Sabina Berretta,
| |
Collapse
|
8
|
Gao Y, Kong L, Liu S, Liu K, Zhu J. Impact of Neurofascin on Chronic Inflammatory Demyelinating Polyneuropathy via Changing the Node of Ranvier Function: A Review. Front Mol Neurosci 2021; 14:779385. [PMID: 34975399 PMCID: PMC8716720 DOI: 10.3389/fnmol.2021.779385] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Accepted: 11/15/2021] [Indexed: 11/18/2022] Open
Abstract
The effective conduction of action potential in the peripheral nervous system depends on the structural and functional integrity of the node of Ranvier and paranode. Neurofascin (NF) plays an important role in the conduction of action potential in a saltatory manner. Two subtypes of NF, NF186, and NF155, are involved in the structure of the node of Ranvier. In patients with chronic inflammatory demyelinating polyneuropathy (CIDP), anti-NF antibodies are produced when immunomodulatory dysfunction occurs, which interferes with the conduction of action potential and is considered the main pathogenic factor of CIDP. In this study, we describe the assembling mechanism and anatomical structure of the node of Ranvier and the necessary cell adhesion molecules for its physiological function. The main points of this study are that we summarized the recent studies on the role of anti-NF antibodies in the changes in the node of Ranvier function and its impact on clinical manifestations and analyzed the possible mechanisms underlying the pathogenesis of CIDP.
Collapse
Affiliation(s)
- Ying Gao
- Neuroscience Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Lingxin Kong
- Neuroscience Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Shan Liu
- Neuroscience Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Kangding Liu
- Neuroscience Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
| | - Jie Zhu
- Neuroscience Center, Department of Neurology, The First Hospital of Jilin University, Jilin University, Changchun, China
- Department of Neurobiology, Care Sciences and Society, Karolinska Institute, Karolinska University Hospital Solna, Stockholm, Sweden
| |
Collapse
|
9
|
Choi K, Lee J, Kang HJ. Myelination defects in the medial prefrontal cortex of Fkbp5 knockout mice. FASEB J 2021; 35:e21297. [PMID: 33410216 DOI: 10.1096/fj.202001883r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/14/2020] [Accepted: 12/07/2020] [Indexed: 12/13/2022]
Abstract
The hypothalamic-pituitary-adrenal (HPA) axis plays a principal role in stress response regulation and has been implicated in the etiology of stress-related disorders. The HPA axis regulates the normal synthesis and release of glucocorticoids; dysregulation of the HPA axis causes abnormal responses to stress. FK506-binding protein 5 (FKBP5), a co-chaperone of heat shock protein 90 in the glucocorticoid receptor (GR) molecular complex, is a key GR sensitivity regulator. FKBP5 single nucleotide polymorphisms are associated with dysregulated HPA axis and increased risk of stress-related disorders, including posttraumatic stress disorder (PTSD) and depression. In this study, we profiled the microRNAs (miRNAs) in the medial prefrontal cortex of Fkbp5 knockout (Fkbp5-/- ) mice and identified the target genes of differentially expressed miRNAs using sequence-based miRNA target prediction. Gene ontology analysis revealed that the differentially expressed miRNAs were involved in nervous system development, regulation of cell migration, and intracellular signal transduction. The validation of the expression of predicted target genes using quantitative polymerase chain reaction revealed that the expression of axon development-related genes, specifically actin-binding LIM protein 1 (Ablim1), lemur tyrosine kinase 2 (Lmtk2), kinesin family member 5c (Kif5c), neurofascin (Nfasc), and ephrin type-A receptor 4 (Epha4), was significantly decreased, while that of brain-derived neurotrophic factor (Bdnf) was significantly increased in the brain of Fkbp5-/- mice. These results suggest that axonal development-related genes can serve as potential targets in future studies focused on understanding the pathophysiology of PTSD.
Collapse
Affiliation(s)
- Koeul Choi
- Department of Life Science, Chung-Ang University, Seoul, Korea
| | - Joonhee Lee
- Department of Life Science, Chung-Ang University, Seoul, Korea
| | - Hyo Jung Kang
- Department of Life Science, Chung-Ang University, Seoul, Korea
| |
Collapse
|
10
|
Di Re J, Hsu WCJ, Kayasandik CB, Fularczyk N, James TF, Nenov MN, Negi P, Marosi M, Scala F, Prasad S, Labate D, Laezza F. Inhibition of AKT Signaling Alters βIV Spectrin Distribution at the AIS and Increases Neuronal Excitability. Front Mol Neurosci 2021; 14:643860. [PMID: 34276302 PMCID: PMC8278006 DOI: 10.3389/fnmol.2021.643860] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 05/27/2021] [Indexed: 11/24/2022] Open
Abstract
The axon initial segment (AIS) is a highly regulated subcellular domain required for neuronal firing. Changes in the AIS protein composition and distribution are a form of structural plasticity, which powerfully regulates neuronal activity and may underlie several neuropsychiatric and neurodegenerative disorders. Despite its physiological and pathophysiological relevance, the signaling pathways mediating AIS protein distribution are still poorly studied. Here, we used confocal imaging and whole-cell patch clamp electrophysiology in primary hippocampal neurons to study how AIS protein composition and neuronal firing varied in response to selected kinase inhibitors targeting the AKT/GSK3 pathway, which has previously been shown to phosphorylate AIS proteins. Image-based features representing the cellular pattern distribution of the voltage-gated Na+ (Nav) channel, ankyrin G, βIV spectrin, and the cell-adhesion molecule neurofascin were analyzed, revealing βIV spectrin as the most sensitive AIS protein to AKT/GSK3 pathway inhibition. Within this pathway, inhibition of AKT by triciribine has the greatest effect on βIV spectrin localization to the AIS and its subcellular distribution within neurons, a phenotype that Support Vector Machine classification was able to accurately distinguish from control. Treatment with triciribine also resulted in increased excitability in primary hippocampal neurons. Thus, perturbations to signaling mechanisms within the AKT pathway contribute to changes in βIV spectrin distribution and neuronal firing that may be associated with neuropsychiatric and neurodegenerative disorders.
Collapse
Affiliation(s)
- Jessica Di Re
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX, United States
| | - Wei-Chun J. Hsu
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX, United States
- Biochemistry and Molecular Biology Graduate Program, Graduate School of Biomedical Sciences, University of Texas Medical Branch, Galveston, TX, United States
- M.D./Ph.D. Combined Degree Program, Graduate School of Biomedical Sciences, University of Texas Medical Branch, Galveston, TX, United States
| | - Cihan B. Kayasandik
- Department of Mathematics, University of Houston, Houston, TX, United States
- Department of Computer Engineering, Istanbul Medipol University, Istanbul, Turkey
| | - Nickolas Fularczyk
- Department of Mathematics, University of Houston, Houston, TX, United States
| | - T. F. James
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX, United States
| | - Miroslav N. Nenov
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX, United States
| | - Pooran Negi
- Department of Mathematics, University of Houston, Houston, TX, United States
| | - Mate Marosi
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX, United States
| | - Federico Scala
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX, United States
| | - Saurabh Prasad
- Department of Electrical and Computer Engineering, University of Houston, Houston, TX, United States
| | - Demetrio Labate
- Department of Mathematics, University of Houston, Houston, TX, United States
| | - Fernanda Laezza
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX, United States
| |
Collapse
|
11
|
Kira JI. Anti-Neurofascin 155 Antibody-Positive Chronic Inflammatory Demyelinating Polyneuropathy/Combined Central and Peripheral Demyelination: Strategies for Diagnosis and Treatment Based on the Disease Mechanism. Front Neurol 2021; 12:665136. [PMID: 34177770 PMCID: PMC8222570 DOI: 10.3389/fneur.2021.665136] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 04/06/2021] [Indexed: 02/02/2023] Open
Abstract
Chronic inflammatory demyelinating polyneuropathy (CIDP) is an immune-mediated demyelinating disease of the peripheral nervous system (PNS). A small number of CIDP patients harbors autoantibodies against nodal/paranodal proteins, such as neurofascin 155 (NF155), contactin 1, and contactin-associated protein 1. In most cases, the predominant immunoglobulin (IgG) subclass is IgG4. Node/paranode antibody-positive CIDP demonstrates distinct features compared with antibody-negative CIDP, including a poor response to intravenous immunoglobulin. The neuropathology of biopsied sural nerve shows Schwann cell terminal loop detachment from axons without macrophage infiltration or inflammation. This is partly attributable to IgG4, which blocks protein-protein interactions without inducing inflammation. Anti-NF155 antibody-positive (NF155+) CIDP is unique because of the high frequency of subclinical demyelinating lesions in the central nervous system (CNS). This is probably because NF155 coexists in the PNS and CNS. Such cases showing demyelinating lesions in both the CNS and PNS are now termed combined central and peripheral demyelination (CCPD). NF155+ CIDP/CCPD commonly presents hypertrophy of spinal nerve roots and cranial nerves, such as trigeminal and oculomotor nerves, and extremely high levels of cerebrospinal fluid (CSF) protein, which indicates nerve root inflammation. In the CSF, the CXCL8/IL8, IL13, TNFα, CCL11/eotaxin, CCL2/MCP1, and IFNγ levels are significantly higher and the IL1β, IL1ra, and GCSF levels are significantly lower in NF155+ CIDP than in non-inflammatory neurological diseases. Even compared with anti-NF155 antibody-negative (NF155-) CIDP, the CXCL8/IL8 and IL13 levels are significantly higher and the IL1β and IL1ra levels are significantly lower than those in NF155+ CIDP. Canonical discriminant analysis revealed NF155+ and NF155- CIDP to be separable with IL4, IL10, and IL13, the three most significant discriminators, all of which are required for IgG4 class switching. Therefore, upregulation of both Th2 and Th1 cytokines and downregulation of macrophage-related cytokines are characteristic of NF155+ CIDP, which explains spinal root inflammation and the lack of macrophage infiltration in the sural nerves. All Japanese patients with NF155+ CIDP/CCPD have one of two specific human leukocyte antigen (HLA) haplotypes, which results in a significantly higher prevalence of HLA-DRB1 * 15:01-DQB1 * 06:02 compared with healthy Japanese controls. This indicates an involvement of specific HLA class II molecules and relevant T cells in addition to IgG4 anti-NF155 antibodies in the mechanism underlying IgG4 NF155+ CIDP/CCPD.
Collapse
Affiliation(s)
- Jun-Ichi Kira
- Translational Neuroscience Center, Graduate School of Medicine, and School of Pharmacy at Fukuoka, International University of Health and Welfare, Fukuoka, Japan.,Department of Neurology, Brain and Nerve Center, Fukuoka Central Hospital, International University of Health and Welfare, Fukuoka, Japan
| |
Collapse
|
12
|
Makkawi S, Yonbawi F, Qari Y, Aljinaid M. Combined Central and Peripheral Demyelinating Disease With Good Response to B-Cell Depleting Therapy. Cureus 2021; 13:e14690. [PMID: 34055534 PMCID: PMC8153962 DOI: 10.7759/cureus.14690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Combined central and peripheral demyelination (CCPD) is a rare disorder characterized by demyelinating lesions in both the central and peripheral nervous systems. The following case report is of a 29-year-old man who presented with a three-month history of progressive lower and upper limb weakness associated with facial and arm tremor, as well as urinary hesitancy. Brain and spine magnetic resonance imaging showed multiple demyelinating plaques. Nerve conduction studies revealed evidence of demyelination with severe prolongation of distal motor latencies and reduced conduction velocities. The patient received plasmapheresis and high-dose corticosteroids, which lead to clinical improvement. A rituximab infusion protocol was subsequently started, and the patient received two cycles. There was a significant functional improvement upon the use of rituximab. This study reports a rare neurological disease entity and highlights the necessity for conducting larger studies to optimally demonstrate the efficacy of rituximab in CCPD.
Collapse
Affiliation(s)
- Seraj Makkawi
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, SAU.,Medicine, King Abdullah International Medical Research Center, Jeddah, SAU.,Department of Medicine, Ministry of the National Guard-Health Affairs, Jeddah, SAU
| | - Faisal Yonbawi
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, SAU
| | - Yousef Qari
- College of Medicine, King Saud Bin Abdulaziz University for Health Sciences, Jeddah, SAU
| | - Morad Aljinaid
- Department of Medicine, Ministry of the National Guard-Health Affairs, Jeddah, SAU
| |
Collapse
|
13
|
Wang Z, Zhou X, Zhao N, Xie C, Zhu D, Guan Y. Neurofascin antibodies in chronic inflammatory demyelinating polyradiculoneuropathy: from intrinsic genetic background to clinical manifestations. Neurol Sci 2021; 42:2223-2233. [PMID: 33782779 DOI: 10.1007/s10072-021-05220-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 03/23/2021] [Indexed: 12/26/2022]
Abstract
There are bunch of autoantibodies, particularly autoantibodies against proteins located at the node of Ranvier, have been discovered and transformed the clinical management of chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). Neurofascin (NF) plays an important role in both the nodal and paranodal regions of the node of Ranvier. In this review, we focus on the two characteristic forms of neurofascin: NF186 and NF155, comparing the similarities and differences between them, reviewing the current knowledge on genetic backgrounds, pathogenesis, clinical manifestations, and management of patients with anti-neurofascin positive CIDP. Autoantibodies against neurofascin were mainly IgG4 isotype. Mutation of NFASC gene in human causes severe neurodevelopment disorders, and HLA DRB1*15 may be a strong risk factor for the development of anti-NF155 antibodies. Motor impairment, sensory ataxia, and tremor were the typical presentations of patients with anti-NF155+ CIDP, while tetraplegia and cranial nerve involvement were more common in patients with anti-NF186+ CIDP. Recent studies have depicted a relatively clear picture of anti-NF155+ CIDP, and the strong clinical correlation of NF186 with CIDP remains unclear. The genetic background of neurofascin will assist in future explorations.
Collapse
Affiliation(s)
- Ze Wang
- Department of Neurology, Renji Hospital Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Xiajun Zhou
- Department of Neurology, Renji Hospital Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Nan Zhao
- Department of Neurology, Renji Hospital Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Chong Xie
- Department of Neurology, Renji Hospital Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Desheng Zhu
- Department of Neurology, Renji Hospital Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China
| | - Yangtai Guan
- Department of Neurology, Renji Hospital Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Shanghai, 200127, China.
| |
Collapse
|
14
|
Xie C, Wang Z, Zhao N, Zhu D, Zhou X, Ding J, Wu Y, Yu H, Guan Y. From PNS to CNS: characteristics of anti-neurofascin 186 neuropathy in 16 cases. Neurol Sci 2021; 42:4673-4681. [PMID: 33723708 DOI: 10.1007/s10072-021-05101-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 01/28/2021] [Indexed: 10/21/2022]
Abstract
INTRODUCTION Neurofascin (NF) is critical for the formation and maintenance of Ranvier nodes. NF186, the neuronal form of NF, localizes in the initial segment of axon and Ranvier node. NF186 antibody has been detected in demyelinating diseases of both central nervous system (CNS) and peripheral nervous system (PNS). AIMS To evaluate the clinical features of patients with anti-NF186 IgG neuropathy. METHODS Sixteen patients (16/138) with serum-positive anti-NF186 IgG were included and divided into groups of either CNS or PNS-involved according to their clinical manifestations. Anti-NF186 IgG was detected by cell-based assays. RESULTS In 7 patients who were confirmed to have CNS involvement, the most frequent symptoms were dizziness (57%) and vision impairment (43%); lesions in centrum semiovale, cerebellum, and meninges were shown by magnetic resonance imaging (MRI). In comparison, limb weakness (78%) and numbness (78%) were the most common symptoms in PNS-involved patients; axonal loss and demyelination were confirmed by nerve conduction examinations. Elevated level of cerebrospinal fluid (CSF) protein was found in 12 cases without statistically significant difference between the CNS and PNS groups. Meanwhile, CSF white blood cell counts were found significantly elevated in CNS-involved patients compared with patients of PNS group. Thirteen patients received immunomodulating treatments, and patients with chronic onset and progressive course showed poor response to the therapies. CONCLUSIONS Patients with anti-NF186 IgG neuropathy showed no specific symptoms or signs. It is worth noting that quite a few patients show CNS-impaired signs only, and cranial MRI is essential for the screening of CNS involvement.
Collapse
Affiliation(s)
- Chong Xie
- Department of Neurology, Renji Hospital, Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Pudong, Shanghai, 200127, China
| | - Ze Wang
- Department of Neurology, Renji Hospital, Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Pudong, Shanghai, 200127, China
| | - Nan Zhao
- Department of Neurology, Renji Hospital, Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Pudong, Shanghai, 200127, China
| | - Desheng Zhu
- Department of Neurology, Renji Hospital, Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Pudong, Shanghai, 200127, China
| | - Xiajun Zhou
- Department of Neurology, Renji Hospital, Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Pudong, Shanghai, 200127, China
| | - Jie Ding
- Department of Neurology, Renji Hospital, Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Pudong, Shanghai, 200127, China
| | - Yifan Wu
- Department of Neurology, Renji Hospital, Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Pudong, Shanghai, 200127, China
| | - Haojun Yu
- Department of Neurology, Renji Hospital, Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Pudong, Shanghai, 200127, China
| | - Yangtai Guan
- Department of Neurology, Renji Hospital, Shanghai Jiaotong University School of Medicine, 160 Pujian Road, Pudong, Shanghai, 200127, China.
| |
Collapse
|
15
|
Bame M, McInnis MG, O'Shea KS. MicroRNA Alterations in Induced Pluripotent Stem Cell-Derived Neurons from Bipolar Disorder Patients: Pathways Involved in Neuronal Differentiation, Axon Guidance, and Plasticity. Stem Cells Dev 2020; 29:1145-1159. [PMID: 32438891 PMCID: PMC7469698 DOI: 10.1089/scd.2020.0046] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 05/21/2020] [Indexed: 12/17/2022] Open
Abstract
Bipolar disorder (BP) is a complex psychiatric condition characterized by severe fluctuations in mood for which underlying pathological mechanisms remain unclear. Family and twin studies have identified a hereditary component to the disorder, but a single causative gene (or set of genes) has not been identified. MicroRNAs (miRNAs) are small, noncoding RNAs ∼20 nucleotides in length, that are responsible for the posttranslational regulation of multiple genes. They have been shown to play important roles in neural development as well as in the adult brain, and several miRNAs have been reported to be dysregulated in postmortem brain tissue isolated from bipolar patients. Because there are no viable cellular models to study BP, we have taken advantage of the recent discovery that somatic cells can be reprogrammed to pluripotency then directed to form the full complement of neural cells. Analysis of RNAs extracted from Control and BP patient-derived neurons identified 58 miRNAs that were differentially expressed between the two groups. Using quantitative polymerase chain reaction we validated six miRNAs that were elevated and two miRNAs that were expressed at lower levels in BP-derived neurons. Analysis of the targets of the miRNAs indicate that they may regulate a number of cellular pathways, including axon guidance, Mapk, Ras, Hippo, Neurotrophin, and Wnt signaling. Many are involved in processes previously implicated in BP, such as cell migration, axon guidance, dendrite and synapse development, and function. We have validated targets of several different miRNAs, including AXIN2, BDNF, RELN, and ANK3 as direct targets of differentially expressed miRNAs using luciferase assays. Identification of pathways altered in patient-derived neurons suggests that disruption of these regulatory networks that may contribute to the complex phenotypes in BP.
Collapse
Affiliation(s)
- Monica Bame
- Department of Psychiatry, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Melvin G. McInnis
- Department of Psychiatry, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - K. Sue O'Shea
- Department of Psychiatry, University of Michigan Medical School, Ann Arbor, Michigan, USA
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, Michigan, USA
| |
Collapse
|
16
|
Chataigner LMP, Leloup N, Janssen BJC. Structural Perspectives on Extracellular Recognition and Conformational Changes of Several Type-I Transmembrane Receptors. Front Mol Biosci 2020; 7:129. [PMID: 32850948 PMCID: PMC7427315 DOI: 10.3389/fmolb.2020.00129] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 06/02/2020] [Indexed: 12/19/2022] Open
Abstract
Type-I transmembrane proteins represent a large group of 1,412 proteins in humans with a multitude of functions in cells and tissues. They are characterized by an extracellular, or luminal, N-terminus followed by a single transmembrane helix and a cytosolic C-terminus. The domain composition and structures of the extracellular and intercellular segments differ substantially amongst its members. Most of the type-I transmembrane proteins have roles in cell signaling processes, as ligands or receptors, and in cellular adhesion. The extracellular segment often determines specificity and can control signaling and adhesion. Here we focus on recent structural understanding on how the extracellular segments of several diverse type-I transmembrane proteins engage in interactions and can undergo conformational changes for their function. Interactions at the extracellular side by proteins on the same cell or between cells are enhanced by the transmembrane setting. Extracellular conformational domain rearrangement and structural changes within domains alter the properties of the proteins and are used to regulate signaling events. The combination of structural properties and interactions can support the formation of larger-order assemblies on the membrane surface that are important for cellular adhesion and intercellular signaling.
Collapse
Affiliation(s)
- Lucas M. P. Chataigner
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Utrecht University, Utrecht, Netherlands
| | - Nadia Leloup
- Structural Biology and Protein Biochemistry, Morphic Therapeutic, Waltham, MA, United States
| | - Bert J. C. Janssen
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Utrecht University, Utrecht, Netherlands
| |
Collapse
|
17
|
Hu B, Wang C, Chang Q, Yang W, Wu Z, Meng M, Qu F, Chen P, Zhang C, Zhang Y. NF155-overexpression promotes remyelination and functional restoration in a hypoxic-ischemic mixed neonatal rat forebrain cell culture system. Neurosci Lett 2020; 718:134743. [PMID: 31917235 DOI: 10.1016/j.neulet.2020.134743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 12/31/2019] [Accepted: 01/03/2020] [Indexed: 01/24/2023]
Abstract
White matter injury caused by perinatal hypoxia-ischemia is characterized by myelination disorders; however, its pathophysiological mechanisms are not fully elucidated. The neurofascin 155 (NF155) protein, expressed in oligodendrocytes, is critical for myelination. Previous findings suggest that NF155 participates in the pathological mechanisms of developmental myelination disorders in hypoxic-ischemic cerebral white matter lesions, and it might regulate cytoskeletal changes. Therefore, we hypothesized that increased NF155 expression during the early stages of hypoxic oligodendrocyte injury helps normalize myelin sheath development and consequently improves neural function by repairing paranodal structures of myelin sheaths and regulating cytoskeletal changes. To test this hypothesis, we established a hypoxic-ischemic, mixed neonatal rat forebrain cell culture model. When NF155 expression was upregulated, synergistic effects occurred between this protein and the paranodal proteins CASPR and contactin. In addition, the expression of Rho GTPase family proteins that regulate key cytoskeletal pathways, myelin sheath structures, and functions were restored, and axonal structures acquired a clear and transparent appearance. These results suggest that NF155 may enable myelin sheath repair by repairing paranodal region structures and regulating oligodendrocyte cytoskeletal mechanisms. Overall, the present study provides new insights into the pathogenesis of hypoxic-ischemic cerebral white matter lesions.
Collapse
Affiliation(s)
- Bin Hu
- Department of Pediatrics, The Second Affiliated Hospital of the Army Medical University, Chongqing 400037, China
| | - Chengju Wang
- Department of Pediatrics, The Second Affiliated Hospital of the Army Medical University, Chongqing 400037, China
| | - Qin Chang
- Department of Pediatrics, The Second Affiliated Hospital of the Army Medical University, Chongqing 400037, China
| | - Wang Yang
- Department of Pediatrics, The Second Affiliated Hospital of the Army Medical University, Chongqing 400037, China
| | - Zhifeng Wu
- Department of Pediatrics, The Second Affiliated Hospital of the Army Medical University, Chongqing 400037, China
| | - Meng Meng
- Department of Pediatrics, The Second Affiliated Hospital of the Army Medical University, Chongqing 400037, China
| | - Fuxiang Qu
- Department of Pediatrics, The Second Affiliated Hospital of the Army Medical University, Chongqing 400037, China
| | - Penghui Chen
- Department of Neurobiology, School of Basic Medical Sciences, Army Medical University, Chongqing 400038, China
| | - Chunqing Zhang
- Department of Neurosurgery, The Second Affiliated Hospital of the Army Medical University, Chongqing 400037, China
| | - Yuping Zhang
- Department of Pediatrics, The Second Affiliated Hospital of the Army Medical University, Chongqing 400037, China.
| |
Collapse
|
18
|
Iijima T, Yoshimura T. A Perspective on the Role of Dynamic Alternative RNA Splicing in the Development, Specification, and Function of Axon Initial Segment. Front Mol Neurosci 2019; 12:295. [PMID: 31866821 PMCID: PMC6906172 DOI: 10.3389/fnmol.2019.00295] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 11/15/2019] [Indexed: 11/13/2022] Open
Abstract
Alternative splicing is a powerful mechanism for molecular and functional diversification. In neurons, alternative splicing extensively controls various developmental steps as well as the plasticity and remodeling of neuronal activity in the adult brain. The axon initial segment (AIS) is the specialized compartment of proximal axons that initiates action potential (AP). At the AIS, the ion channels and cell adhesion molecules (CAMs) required for AP initiation are densely clustered via the scaffolding and cytoskeletal proteins. Notably, recent studies have elucidated that multiple AIS proteins are controlled by extensive alternative splicing in developing and adult brains. Here, we argue the potential role of dynamic regulation of alternative splicing in the development, specification, and functions of the AIS. In particular, we propose the novel concept that alternative splicing potentially modulates the structural and functional plasticity at the AIS.
Collapse
Affiliation(s)
- Takatoshi Iijima
- Department of Molecular Life Science, Division of Basic Medical Science and Molecular Medicine, School of Medicine, Tokai University, Isehara, Japan
| | - Takeshi Yoshimura
- Department of Child Development and Molecular Brain Science, United Graduate School of Child Development, Osaka University, Suita, Japan
| |
Collapse
|
19
|
Kvarnung M, Shahsavani M, Taylan F, Moslem M, Breeuwsma N, Laan L, Schuster J, Jin Z, Nilsson D, Lieden A, Anderlid BM, Nordenskjöld M, Syk Lundberg E, Birnir B, Dahl N, Nordgren A, Lindstrand A, Falk A. Ataxia in Patients With Bi-Allelic NFASC Mutations and Absence of Full-Length NF186. Front Genet 2019; 10:896. [PMID: 31608123 PMCID: PMC6769111 DOI: 10.3389/fgene.2019.00896] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 08/23/2019] [Indexed: 01/29/2023] Open
Abstract
The etiology of hereditary ataxia syndromes is heterogeneous, and the mechanisms underlying these disorders are often unknown. Here, we utilized exome sequencing in two siblings with progressive ataxia and muscular weakness and identified a novel homozygous splice mutation (c.3020-1G > A) in neurofascin (NFASC). In RNA extracted from fibroblasts, we showed that the mutation resulted in inframe skipping of exon 26, with a deprived expression of the full-length transcript that corresponds to NFASC isoform NF186. To further investigate the disease mechanisms, we reprogrammed fibroblasts from one affected sibling to induced pluripotent stem cells, directed them to neuroepithelial stem cells and finally differentiated to neurons. In early neurogenesis, differentiating cells with selective depletion of the NF186 isoform showed significantly reduced neurite outgrowth as well as fewer emerging neurites. Furthermore, whole-cell patch-clamp recordings of patient-derived neuronal cells revealed a lower threshold for openings, indicating altered Na+ channel kinetics, suggesting a lower threshold for openings as compared to neuronal cells without the NFASC mutation. Taken together, our results suggest that loss of the full-length NFASC isoform NF186 causes perturbed neurogenesis and impaired neuronal biophysical properties resulting in a novel early-onset autosomal recessive ataxia syndrome.
Collapse
Affiliation(s)
- Malin Kvarnung
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Mansoureh Shahsavani
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden.,Department of Neuroscience, Karolinska Institutet, Biomedicum, Stockholm, Sweden
| | - Fulya Taylan
- Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Mohsen Moslem
- Department of Neuroscience, Karolinska Institutet, Biomedicum, Stockholm, Sweden
| | - Nicole Breeuwsma
- Department of Neuroscience, Karolinska Institutet, Biomedicum, Stockholm, Sweden
| | - Loora Laan
- Department of Immunology, Genetics, and Pathology, Science for Life Laboratory, Biomedical Centre, Uppsala University, Uppsala, Sweden
| | - Jens Schuster
- Department of Immunology, Genetics, and Pathology, Science for Life Laboratory, Biomedical Centre, Uppsala University, Uppsala, Sweden
| | - Zhe Jin
- Department of Neuroscience, Biomedical Centre, Uppsala University, Uppsala, Sweden
| | - Daniel Nilsson
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Agne Lieden
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Britt-Marie Anderlid
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Magnus Nordenskjöld
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Elisabeth Syk Lundberg
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Bryndis Birnir
- Department of Neuroscience, Biomedical Centre, Uppsala University, Uppsala, Sweden
| | - Niklas Dahl
- Department of Immunology, Genetics, and Pathology, Science for Life Laboratory, Biomedical Centre, Uppsala University, Uppsala, Sweden
| | - Ann Nordgren
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Anna Lindstrand
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Anna Falk
- Department of Neuroscience, Karolinska Institutet, Biomedicum, Stockholm, Sweden
| |
Collapse
|
20
|
Stengel H, Vural A, Brunder AM, Heinius A, Appeltshauser L, Fiebig B, Giese F, Dresel C, Papagianni A, Birklein F, Weis J, Huchtemann T, Schmidt C, Körtvelyessy P, Villmann C, Meinl E, Sommer C, Leypoldt F, Doppler K. Anti-pan-neurofascin IgG3 as a marker of fulminant autoimmune neuropathy. NEUROLOGY-NEUROIMMUNOLOGY & NEUROINFLAMMATION 2019; 6:6/5/e603. [PMID: 31454780 PMCID: PMC6705632 DOI: 10.1212/nxi.0000000000000603] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 06/25/2019] [Indexed: 12/31/2022]
Abstract
Objective To identify and characterize patients with autoantibodies against different neurofascin (NF) isoforms. Methods Screening of a large cohort of patient sera for anti-NF autoantibodies by ELISA and further characterization by cell-based assays, epitope mapping, and complement binding assays. Results Two different clinical phenotypes became apparent in this study: The well-known clinical picture of subacute-onset severe sensorimotor neuropathy with tremor that is known to be associated with IgG4 autoantibodies against the paranodal isoform NF-155 was found in 2 patients. The second phenotype with a dramatic course of disease with tetraplegia and almost locked-in syndrome was associated with IgG3 autoantibodies against nodal and paranodal isoforms of NF in 3 patients. The epitope against which these autoantibodies were directed in this second phenotype was the common Ig domain found in all 3 NF isoforms. In contrast, anti–NF-155 IgG4 were directed against the NF-155–specific Fn3Fn4 domain. The description of a second phenotype of anti–NF-associated neuropathy is in line with some case reports of similar patients that were published in the last year. Conclusions Our results indicate that anti–pan-NF-associated neuropathy differs from anti–NF-155-associated neuropathy, and epitope and subclass play a major role in the pathogenesis and severity of anti–NF-associated neuropathy and should be determined to correctly classify patients, also in respect to possible differences in therapeutic response.
Collapse
Affiliation(s)
- Helena Stengel
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Atay Vural
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Anna-Michelle Brunder
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Annika Heinius
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Luise Appeltshauser
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Bianca Fiebig
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Florian Giese
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Christian Dresel
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Aikaterini Papagianni
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Frank Birklein
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Joachim Weis
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Tessa Huchtemann
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Christian Schmidt
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Peter Körtvelyessy
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Carmen Villmann
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Edgar Meinl
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Claudia Sommer
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Frank Leypoldt
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey
| | - Kathrin Doppler
- From the Department of Neurology (H.S., A.M.B., L.A., B.F., A.P., C.S., K.D.), University Hospital Würzburg; Institute of Clinical Neuroimmunology (A.V., E.M.), Biomedical Center, University Hospitals, Ludwig-Maximilians-Universität München, Planegg-Martinsried; Universitätsklinikum Schleswig-Holstein Campus Kiel (A.H., F.L.), Neuroimmunology Section, Institute of Clinical Chemistry, Kiel/Lübeck; Department of Neurology (F.G.), University Hospital Halle; Department of Neurology (C.D., F.B.), University Hospital Mainz, Mainz; University Hospital Aachen (J.W.), Institute of Neuropathology, Aachen; Department of Neurology (T.H., P.K.), University Hospital Magdeburg; Institute for Pharmacology and Toxicology (C.S.), Otto-von-Guericke University; German Center for Neurodegenerative Diseases (P.K.), Magdeburg; Institute for Clinical Neurobiology (C.V.), University Hospital Würzburg; Department of Neurology (F.L.), Universitätsklinikum Schleswig-Holstein, Kiel, Germany; and Research Center for Translational Medicine (A.V), Koç University, Istanbul, Turkey.
| |
Collapse
|
21
|
Cross-Talk between Fibroblast Growth Factor Receptors and Other Cell Surface Proteins. Cells 2019; 8:cells8050455. [PMID: 31091809 PMCID: PMC6562592 DOI: 10.3390/cells8050455] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 05/08/2019] [Accepted: 05/13/2019] [Indexed: 12/14/2022] Open
Abstract
Fibroblast growth factors (FGFs) and their receptors (FGFRs) constitute signaling circuits that transmit signals across the plasma membrane, regulating pivotal cellular processes like differentiation, migration, proliferation, and apoptosis. The malfunction of FGFs/FGFRs signaling axis is observed in numerous developmental and metabolic disorders, and in various tumors. The large diversity of FGFs/FGFRs functions is attributed to a great complexity in the regulation of FGFs/FGFRs-dependent signaling cascades. The function of FGFRs is modulated at several levels, including gene expression, alternative splicing, posttranslational modifications, and protein trafficking. One of the emerging ways to adjust FGFRs activity is through formation of complexes with other integral proteins of the cell membrane. These proteins may act as coreceptors, modulating binding of FGFs to FGFRs and defining specificity of elicited cellular response. FGFRs may interact with other cell surface receptors, like G-protein-coupled receptors (GPCRs) or receptor tyrosine kinases (RTKs). The cross-talk between various receptors modulates the strength and specificity of intracellular signaling and cell fate. At the cell surface FGFRs can assemble into large complexes involving various cell adhesion molecules (CAMs). The interplay between FGFRs and CAMs affects cell–cell interaction and motility and is especially important for development of the central nervous system. This review summarizes current stage of knowledge about the regulation of FGFRs by the plasma membrane-embedded partner proteins and highlights the importance of FGFRs-containing membrane complexes in pathological conditions, including cancer.
Collapse
|
22
|
Monfrini E, Straniero L, Bonato S, Monzio Compagnoni G, Bordoni A, Dilena R, Rinchetti P, Silipigni R, Ronchi D, Corti S, Comi GP, Bresolin N, Duga S, Di Fonzo A. Neurofascin (NFASC) gene mutation causes autosomal recessive ataxia with demyelinating neuropathy. Parkinsonism Relat Disord 2019; 63:66-72. [PMID: 30850329 DOI: 10.1016/j.parkreldis.2019.02.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 01/10/2019] [Accepted: 02/25/2019] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Neurofascin, encoded by NFASC, is a transmembrane protein that plays an essential role in nervous system development and node of Ranvier function. Anti-Neurofascin autoantibodies cause a specific type of chronic inflammatory demyelinating polyneuropathy (CIDP) often characterized by cerebellar ataxia and tremor. Recently, homozygous NFASC mutations were recently associated with a neurodevelopmental disorder in two families. METHODS A combined approach of linkage analysis and whole-exome sequencing was performed to find the genetic cause of early-onset cerebellar ataxia and demyelinating neuropathy in two siblings from a consanguineous Italian family. Functional studies were conducted on neurons from induced pluripotent stem cells (iPSCs) generated from the patients. RESULTS Genetic analysis revealed a homozygous p.V1122E mutation in NFASC. This mutation, affecting a highly conserved hydrophobic transmembrane domain residue, led to significant loss of Neurofascin protein in the iPSC-derived neurons of affected siblings. CONCLUSIONS The identification of NFASC mutations paves the way for genetic research in the developing field of nodopathies, an emerging pathological entity involving the nodes of Ranvier, which are associated for the first time with a hereditary ataxia syndrome with neuropathy.
Collapse
Affiliation(s)
- Edoardo Monfrini
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy; Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Letizia Straniero
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy; Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Sara Bonato
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy; Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Giacomo Monzio Compagnoni
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy; Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Andreina Bordoni
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy; Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Robertino Dilena
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurofisiopatologia Pediatrica, UOC Neurofisiopatologia, Milan, Italy
| | - Paola Rinchetti
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy; Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Rosamaria Silipigni
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Laboratory of Medical Genetics, Milan, Italy
| | - Dario Ronchi
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy; Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Stefania Corti
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy; Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Giacomo P Comi
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy; Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Nereo Bresolin
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy; Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Stefano Duga
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy; Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Alessio Di Fonzo
- Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy; Dino Ferrari Center, Neuroscience Section, Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
| |
Collapse
|
23
|
Kira JI, Yamasaki R, Ogata H. Anti-neurofascin autoantibody and demyelination. Neurochem Int 2018; 130:104360. [PMID: 30582947 DOI: 10.1016/j.neuint.2018.12.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 11/30/2018] [Accepted: 12/21/2018] [Indexed: 12/24/2022]
Abstract
Demyelination diseases involving the central and peripheral nervous systems are etiologically heterogeneous with both cell-mediated and humoral immunities playing pathogenic roles. Recently, autoantibodies against nodal and paranodal proteins, such as neurofascin186 (NF186), neurofascin155 (NF155), contactin-1 (CNTN1), contactin-associated protein 1 (CASPR1) and gliomedin, have been discovered in not only chronic demyelinating conditions, such as multiple sclerosis (MS) and chronic inflammatory demyelinating polyradiculoneuropathy, but also in acute demyelinating conditions, such as Guillain-Barré syndrome. Only a minority of these patients harbor anti-nodal/paranodal protein antibodies; however, these autoantibodies, especially IgG4 subclass autoantibodies to paranodal proteins, are associated with unique features and these conditions are collectively termed nodopathy or paranodopathy. Establishing a concept of IgG4-related nodopathy/paranodopathy contributes to diagnosis and treatment strategy because IgG4 autoantibody-related neurological diseases are often refractory to conventional immunotherapies. IgG4 does not fix complements, or internalize the target antigens, because IgG4 exists in a monovalent bispecific form in vivo. IgG4 autoantibodies can bock protein-protein interaction. Thus, the primary role of IgG4 anti-paranodal protein antibodies may be blockade of interactions between NF155 and CNTN1/CASPR1, leading to conduction failure, which is consistent with the sural nerve pathology presenting paranodal terminal loop detachment from axons with intact internodes in the absence of inflammation. However, it still remains to be elucidated how these autoantibodies belonging to the same IgG4 subclass can cause each IgG4 autoantibody-specific manifestation. Another important issue is to clarify the mechanism by which IgG4 antibodies to nodal/paranodal proteins emerge. IgG4 antibodies develop on chronic antigenic stimulation and can block antibodies that alleviate allergic inflammation by interfering with the binding of allergen-specific IgE to allergens. Thus, environmental antigens cross-reacting with nodal and paranodal proteins may warrant future study.
Collapse
Affiliation(s)
- Jun-Ichi Kira
- Department of Neurology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Ryo Yamasaki
- Department of Neurology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Hidenori Ogata
- Department of Neurology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| |
Collapse
|
24
|
Najafi H, Hosseini SM, Tavallaie M, Soltani BM. A Predicted Molecular Model for Development of Human Intelligence. NEUROCHEM J+ 2018. [DOI: 10.1134/s1819712418030091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
25
|
Stevens AJ, Rucklidge JJ, Darling KA, Eggleston MJ, Pearson JF, Kennedy MA. Methylomic changes in response to micronutrient supplementation and MTHFR genotype. Epigenomics 2018; 10:1201-1214. [PMID: 30182732 DOI: 10.2217/epi-2018-0029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Exposure times and dosage required for dietary components to modify DNA methylation patterns are largely unknown. AIM This exploratory research represents the first genome-wide analysis of DNA methylation changes during a randomized-controlled-trial (RCT) for dietary supplementation with broad spectrum vitamins, minerals and amino acids in humans. METHODS Genome-wide changes in methylation from paired, peripheral blood samples were assessed using the Infinium Methylation EPIC 850 K array. RESULTS Methylation increased at 84% of the most significant differentially methylated CpGs; however, none showed significance after adjustment for genome-wide testing. CONCLUSION Micronutrient supplementation is unlikely to have a substantial biological effect on DNA methylation over 10 weeks; however, the trend toward hypermethylation that we observed is likely to become more marked with longer exposure periods.
Collapse
Affiliation(s)
- Aaron J Stevens
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, P.O. Box 4345, Christchurch, New Zealand
| | - Julia J Rucklidge
- Department of Psychology, University of Canterbury, Christchurch, New Zealand
| | - Kathryn A Darling
- Department of Psychology, University of Canterbury, Christchurch, New Zealand
| | - Matthew Jf Eggleston
- Department of Psychological Medicine, University of Otago, Christchurch, P.O. Box 4345, Christchurch, New Zealand
| | - John F Pearson
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, P.O. Box 4345, Christchurch, New Zealand
| | - Martin A Kennedy
- Department of Pathology and Biomedical Science, University of Otago, Christchurch, P.O. Box 4345, Christchurch, New Zealand
| |
Collapse
|
26
|
Yan X, Uronen RL, Huttunen HJ. The interaction of α-synuclein and Tau: A molecular conspiracy in neurodegeneration? Semin Cell Dev Biol 2018; 99:55-64. [PMID: 29738880 DOI: 10.1016/j.semcdb.2018.05.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 02/06/2018] [Accepted: 05/04/2018] [Indexed: 12/18/2022]
Abstract
α-synuclein and Tau are proteins prone to pathological misfolding and aggregation that are normally found in the presynaptic and axonal compartments of neurons. Misfolding initiates a homo-oligomerization and aggregation cascade culminating in cerebral accumulation of aggregated α-synuclein and Tau in insoluble protein inclusions in multiple neurodegenerative diseases. Traditionally, α-synuclein-containing Lewy bodies have been associated with Parkinson's disease and Tau-containing neurofibrillary tangles with Alzheimer's disease and various frontotemporal dementia syndromes. However, there is significant overlap and co-occurrence of α-synuclein and Tau pathologies in a spectrum of neurodegenerative diseases. Importantly, α-synuclein and Tau can interact in cells, and their pathological conformations are capable of templating further misfolding and aggregation of each other. They also share a number of protein interactors indicating that network perturbations may contribute to chronic proteotoxic stress and neuronal dysfunction in synucleinopathies and tauopathies, some of which share similarities in both neuropathological and clinical manifestations. In this review, we focus on the protein interactions of these two pathologically important proteins and consider a network biology perspective towards neurodegenerative diseases.
Collapse
Affiliation(s)
- Xu Yan
- Neuroscience Center, Helsinki Institute of Life Science (HiLIFE), University of Helsinki, 00014 Helsinki, Finland
| | - Riikka-Liisa Uronen
- Neuroscience Center, Helsinki Institute of Life Science (HiLIFE), University of Helsinki, 00014 Helsinki, Finland
| | - Henri J Huttunen
- Neuroscience Center, Helsinki Institute of Life Science (HiLIFE), University of Helsinki, 00014 Helsinki, Finland.
| |
Collapse
|
27
|
Saha R, Kriebel M, Volkmer H, Richter-Levin G, Albrecht A. Neurofascin Knock Down in the Basolateral Amygdala Mediates Resilience of Memory and Plasticity in the Dorsal Dentate Gyrus Under Stress. Mol Neurobiol 2018; 55:7317-7326. [DOI: 10.1007/s12035-018-0930-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 01/24/2018] [Indexed: 11/24/2022]
|
28
|
Duits FH, Brinkmalm G, Teunissen CE, Brinkmalm A, Scheltens P, Van der Flier WM, Zetterberg H, Blennow K. Synaptic proteins in CSF as potential novel biomarkers for prognosis in prodromal Alzheimer's disease. ALZHEIMERS RESEARCH & THERAPY 2018; 10:5. [PMID: 29370833 PMCID: PMC6389073 DOI: 10.1186/s13195-017-0335-x] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 12/20/2017] [Indexed: 12/30/2022]
Abstract
BACKGROUND We investigated whether a panel of 12 potential novel biomarkers consisting of proteins involved in synapse functioning and immunity would be able to distinguish patients with Alzheimer's disease (AD) and patients with mild cognitive impairment (MCI) from control subjects. METHODS We included 40 control subjects, 40 subjects with MCI, and 40 subjects with AD from the Amsterdam Dementia Cohort who were matched for age and sex (age 65 ± 5 years, 19 [48%] women). The mean follow-up of patients with MCI was 3 years. Two or three tryptic peptides per protein were analyzed in cerebrospinal fluid using parallel reaction monitoring mass spectrometry. Corresponding stable isotope-labeled peptides were added and used as reference peptides. Multilevel generalized estimating equations (GEEs) with peptides clustered per subject and per protein (as within-subject variables) were used to assess differences between diagnostic groups. To assess differential effects of individual proteins, we included the diagnosis × protein interaction in the model. Separate GEE analyses were performed to assess differences between stable patients and patients with progressive MCI (MCI-AD). RESULTS There was a main effect for diagnosis (p < 0.01) and an interaction between diagnosis and protein (p < 0.01). Analysis stratified according to protein showed higher levels in patients with MCI for most proteins, especially in patients with MCI-AD. Chromogranin A, secretogranin II, neurexin 3, and neuropentraxin 1 showed the largest effect sizes; β values ranged from 0.53 to 0.78 for patients with MCI versus control subjects or patients with AD, and from 0.67 to 0.98 for patients with MCI-AD versus patients with stable MCI. In contrast, neurosecretory protein VGF was lower in patients with AD than in patients with MCI (ß = -0.93 [SE 0.22]) and control subjects (ß = 0.46 [SE 0.19]). CONCLUSIONS Our results suggest that several proteins involved in vesicular transport and synaptic stability are elevated in patients with MCI, especially in patients with MCI progressing to AD dementia. This may reflect early events in the AD pathophysiological cascade. These proteins may be valuable as disease stage or prognostic markers in an early symptomatic stage of the disease.
Collapse
Affiliation(s)
- Flora H Duits
- Alzheimer Center and Department of Neurology, Amsterdam Neuroscience, VU University Medical Center, P.O. Box 7057, 1007MB, Amsterdam, The Netherlands.
| | - Gunnar Brinkmalm
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Charlotte E Teunissen
- Alzheimer Center and Department of Neurology, Amsterdam Neuroscience, VU University Medical Center, P.O. Box 7057, 1007MB, Amsterdam, The Netherlands.,Neurochemistry Laboratory and Biobank, Department of Clinical Chemistry, Amsterdam Neuroscience, VU University Medical Center, Amsterdam, The Netherlands
| | - Ann Brinkmalm
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Philip Scheltens
- Alzheimer Center and Department of Neurology, Amsterdam Neuroscience, VU University Medical Center, P.O. Box 7057, 1007MB, Amsterdam, The Netherlands
| | - Wiesje M Van der Flier
- Alzheimer Center and Department of Neurology, Amsterdam Neuroscience, VU University Medical Center, P.O. Box 7057, 1007MB, Amsterdam, The Netherlands.,Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, The Netherlands
| | - Henrik Zetterberg
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden.,Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, UK.,UK Dementia Research Institute at UCL, University College London, London, UK
| | - Kaj Blennow
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| |
Collapse
|
29
|
Hoshino M, Suzuki Y, Akiyama H, Yamada K, Shima S, Mutoh T, Hasegawa Y. [Efficacy of high-dose steroid pulse therapy for anti-galactocerebroside antibody-positive combined central and peripheral demyelination]. Rinsho Shinkeigaku 2017; 57:747-752. [PMID: 29187683 DOI: 10.5692/clinicalneurol.cn-000977] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A 59-year-old man had been admitted to another hospital because of diplopia and thirst at the beginning of March and was diagnosed with diabetic ketoacidosis. He was referred to our hospital because he had limb weakness, dysarthria, and bilateral sensory impairment of the upper limbs, which worsened rapidly from the middle of March, although plasma glucose had been well controlled after the initiation of insulin therapy in the previous hospital. Contrast spinal MRI in our hospital revealed hyperintense lesions at the level of C4 to C5 and T10. The level of myelin basic protein was high (1,260 pg/ml) in the cerebrospinal fluid and serum anti-neurofascin antibody was negative. Nerve conduction study showed typical findings of demyelination at least 2 regions. Although anti-neurofascin antibody was negative, he was diagnosed with combined central and peripheral demyelination (CCPD) based on these clinical findings. After the repeated methylprednisolone pulse therapy for five times, the hyperintense lesions of the spinal cord disappeared gradually. He was bedridden at the beginning of his hospitalization but could ambulate with a cane on discharge 2 months after the admission. Then we received the result of anti-galactocerebroside antibody test as positive. This case suggested that high-dose steroid pulse therapy is safe and may be effective for anti-galactocerebroside antibody-positive CCPD.
Collapse
Affiliation(s)
- Masashi Hoshino
- Department of Internal Medicine, Division of Neurology, St Marianna University School of Medicine
| | - Yu Suzuki
- Department of Internal Medicine, Division of Neurology, St Marianna University School of Medicine
| | - Hisanao Akiyama
- Department of Internal Medicine, Division of Neurology, St Marianna University School of Medicine
| | - Kouji Yamada
- Department of Internal Medicine, Division of Neurology, St Marianna University School of Medicine
| | - Sayuri Shima
- Department of Neurology, Fujita Health University School of Medicine
| | - Tatsuro Mutoh
- Department of Neurology, Fujita Health University School of Medicine
| | - Yasuhiro Hasegawa
- Department of Internal Medicine, Division of Neurology, St Marianna University School of Medicine
| |
Collapse
|
30
|
Brinkmalm G, Sjödin S, Simonsen AH, Hasselbalch SG, Zetterberg H, Brinkmalm A, Blennow K. A Parallel Reaction Monitoring Mass Spectrometric Method for Analysis of Potential CSF Biomarkers for Alzheimer's Disease. Proteomics Clin Appl 2017; 12. [PMID: 29028155 DOI: 10.1002/prca.201700131] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Indexed: 01/04/2023]
Abstract
SCOPE The aim of this study was to develop and evaluate a parallel reaction monitoring mass spectrometry (PRM-MS) assay consisting of a panel of potential protein biomarkers in cerebrospinal fluid (CSF). EXPERIMENTAL DESIGN Thirteen proteins were selected based on their association with neurodegenerative diseases and involvement in synaptic function, secretory vesicle function, or innate immune system. CSF samples were digested and two to three peptides per protein were quantified using stable isotope-labeled peptide standards. RESULTS Coefficients of variation were generally below 15%. Clinical evaluation was performed on a cohort of 10 patients with Alzheimer's disease (AD) and 15 healthy subjects. Investigated proteins of the granin family exhibited the largest difference between the patient groups. Secretogranin-2 (p<0.005) and neurosecretory protein VGF (p<0.001) concentrations were lowered in AD. For chromogranin A, two of three peptides had significantly lowered AD concentrations (p<0.01). The concentrations of the synaptic proteins neurexin-1 and neuronal pentraxin-1, as well as neurofascin were also significantly lowered in AD (p<0.05). The other investigated proteins, β2-microglobulin, cystatin C, amyloid precursor protein, lysozyme C, neurexin-2, neurexin-3, and neurocan core protein, were not significantly altered. CONCLUSION AND CLINICAL RELEVANCE PRM-MS of protein panels is a valuable tool to evaluate biomarker candidates for neurodegenerative disorders.
Collapse
Affiliation(s)
- Gunnar Brinkmalm
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, The Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Simon Sjödin
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, The Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Anja Hviid Simonsen
- Danish Dementia Research Centre, Rigshospitalet, Copenhagen University, Copenhagen, Denmark
| | | | - Henrik Zetterberg
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, The Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden.,Department of Molecular Neuroscience, University College London Institute of Neurology, Queen Square, London, UK.,UK Dementia Research Institute, London, UK
| | - Ann Brinkmalm
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, The Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Kaj Blennow
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, The Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| |
Collapse
|
31
|
Suzuki S, Ayukawa N, Okada C, Tanaka M, Takekoshi S, Iijima Y, Iijima T. Spatio-temporal and dynamic regulation of neurofascin alternative splicing in mouse cerebellar neurons. Sci Rep 2017; 7:11405. [PMID: 28900163 PMCID: PMC5595909 DOI: 10.1038/s41598-017-11319-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 08/22/2017] [Indexed: 12/13/2022] Open
Abstract
Alternative splicing is crucial for molecular diversification, which greatly contributes to the complexity and specificity of neural functions in the central nervous system (CNS). Neurofascin (NF) is a polymorphic cell surface protein that has a number of splicing isoforms. As the alternative splicing of the neurofascin gene (Nfasc) is developmentally regulated, NF isoforms have distinct functions in immature and mature brains. However, the molecular mechanisms underlying the alternative splicing of Nfasc in neurons are not yet understood. Here, we demonstrate that, alongside developmental regulation, Nfasc alternative splicing is spatially controlled in the mouse brain. We then identified distinct Nfasc splicing patterns at the cell-type level in the cerebellum, with Nfasc186 being expressed in Purkinje cells and absent from granule cells (GCs). Furthermore, we show that high K+-induced depolarization triggers a shift in splicing from Nfasc140 to Nfasc186 in cerebellar GCs. Finally, we identified a neural RNA-binding protein, Rbfox, as a key player in neural NF isoform selection, specifically controlling splicing at exons 26−29. Together, our results show that Nfasc alternative splicing is spatio-temporally and dynamically regulated in cerebellar neurons. Our findings provide profound insight into the mechanisms underlying the functional diversity of neuronal cell-adhesive proteins in the mammalian CNS.
Collapse
Affiliation(s)
- Satoko Suzuki
- Tokai University Institute of Innovative Science and Technology, 143 Shimokasuya, Isehara City, Kanagawa 259-1193, Japan; and 411 Kitakaname, Hiratsuka City, Kanagawa, 259-1292, Japan
| | - Noriko Ayukawa
- Tokai University Institute of Innovative Science and Technology, 143 Shimokasuya, Isehara City, Kanagawa 259-1193, Japan; and 411 Kitakaname, Hiratsuka City, Kanagawa, 259-1292, Japan
| | - Chisa Okada
- Support Center for Medical Research and Education, Tokai University, 143 Shimokasuya, Isehara City, Kanagawa, 259-1193, Japan
| | - Masami Tanaka
- Tokai University Institute of Innovative Science and Technology, 143 Shimokasuya, Isehara City, Kanagawa 259-1193, Japan; and 411 Kitakaname, Hiratsuka City, Kanagawa, 259-1292, Japan
| | - Susumu Takekoshi
- Department of Cell Biology, Division of Host Defense Mechanism, School of Medicine, Tokai University, 143 Shimokasuya, Isehara City, Kanagawa, 259-1193, Japan
| | - Yoko Iijima
- Tokai University Institute of Innovative Science and Technology, 143 Shimokasuya, Isehara City, Kanagawa 259-1193, Japan; and 411 Kitakaname, Hiratsuka City, Kanagawa, 259-1292, Japan
| | - Takatoshi Iijima
- Tokai University Institute of Innovative Science and Technology, 143 Shimokasuya, Isehara City, Kanagawa 259-1193, Japan; and 411 Kitakaname, Hiratsuka City, Kanagawa, 259-1292, Japan.
| |
Collapse
|
32
|
Vascak M, Sun J, Baer M, Jacobs KM, Povlishock JT. Mild Traumatic Brain Injury Evokes Pyramidal Neuron Axon Initial Segment Plasticity and Diffuse Presynaptic Inhibitory Terminal Loss. Front Cell Neurosci 2017. [PMID: 28634442 PMCID: PMC5459898 DOI: 10.3389/fncel.2017.00157] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The axon initial segment (AIS) is the site of action potential (AP) initiation, thus a crucial regulator of neuronal activity. In excitatory pyramidal neurons, the high density of voltage-gated sodium channels (NaV1.6) at the distal AIS regulates AP initiation. A surrogate AIS marker, ankyrin-G (ankG) is a structural protein regulating neuronal functional via clustering voltage-gated ion channels. In neuronal circuits, changes in presynaptic input can alter postsynaptic output via AIS structural-functional plasticity. Recently, we showed experimental mild traumatic brain injury (mTBI) evokes neocortical circuit disruption via diffuse axonal injury (DAI) of excitatory and inhibitory neuronal systems. A key finding was that mTBI-induced neocortical electrophysiological changes involved non-DAI/ intact excitatory pyramidal neurons consistent with AIS-specific alterations. In the current study we employed Thy1-yellow fluorescent protein (YFP)-H mice to test if mTBI induces AIS structural and/or functional plasticity within intact pyramidal neurons 2 days after mTBI. We used confocal microscopy to assess intact YFP+ pyramidal neurons in layer 5 of primary somatosensory barrel field (S1BF), whose axons were continuous from the soma of origin to the subcortical white matter (SCWM). YFP+ axonal traces were superimposed on ankG and NaV1.6 immunofluorescent profiles to determine AIS position and length. We found that while mTBI had no effect on ankG start position, the length significantly decreased from the distal end, consistent with the site of AP initiation at the AIS. However, NaV1.6 structure did not change after mTBI, suggesting uncoupling from ankG. Parallel quantitative analysis of presynaptic inhibitory terminals along the postsynaptic perisomatic domain of these same intact YFP+ excitatory pyramidal neurons revealed a significant decrease in GABAergic bouton density. Also within this non-DAI population, patch-clamp recordings of intact YFP+ pyramidal neurons showed AP acceleration decreased 2 days post-mTBI, consistent with AIS functional plasticity. Simulations of realistic pyramidal neuron computational models using experimentally determined AIS lengths showed a subtle decrease is NaV1.6 density is sufficient to attenuate AP acceleration. Collectively, these findings highlight the complexity of mTBI-induced neocortical circuit disruption, involving changes in extrinsic/presynaptic inhibitory perisomatic input interfaced with intrinsic/postsynaptic intact excitatory neuron AIS output.
Collapse
Affiliation(s)
- Michal Vascak
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of MedicineRichmond, VA, United States
| | - Jianli Sun
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of MedicineRichmond, VA, United States
| | - Matthew Baer
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of MedicineRichmond, VA, United States
| | - Kimberle M Jacobs
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of MedicineRichmond, VA, United States
| | - John T Povlishock
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of MedicineRichmond, VA, United States
| |
Collapse
|
33
|
Samulin Erdem J, Arnoldussen YJ, Skaug V, Haugen A, Zienolddiny S. Copy number variation, increased gene expression, and molecular mechanisms of neurofascin in lung cancer. Mol Carcinog 2017; 56:2076-2085. [PMID: 28418179 PMCID: PMC6084301 DOI: 10.1002/mc.22664] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 03/31/2017] [Accepted: 04/13/2017] [Indexed: 12/21/2022]
Abstract
Metastasis and cell adhesion are key aspects of cancer progression. Neurofascin (NFASC) is a member of the immunoglobulin superfamily of adhesion molecules and, while studies on NFASC are inadequate, other members have been indicated pivotal roles in cancer progression and metastasis. This study aimed at increasing the knowledge on the involvement of adhesion molecules in lung cancer progression by studying the regulation and role of NFASC in non‐small cell lung cancer (NSCLC). Here, copy number variations in the NFASC gene were analyzed in tumor and non‐tumorous lung tissues of 204 NSCLC patients. Frequent gene amplifications (OR = 4.50, 95%CI: 2.27‐8.92, P ≤ 0.001) and increased expression of NFASC (P = 0.034) were identified in tumors of NSCLC patients. Furthermore, molecular mechanisms of NFASC in lung cancer progression were evaluated by investigating the effects of NFASC silencing on cell proliferation, viability, migration, and invasion using siRNA technology in four NSCLC cell lines. Silencing of NFASC did not affect cell proliferation or viability but rather decreased NSCLC cell migration (P ≤ 0.001) and led to morphological changes, rearrangements in the actin cytoskeleton and changes in F‐actin networks in migrating NSCLC cell lines. This study is the first to report frequent copy number gain and increased expression of NFASC in NSCLC. Moreover, these data suggest that NFASC is a novel regulator of NSCLC cell motility and support a role of NFASC in the regulation of NSCLC progression.
Collapse
Affiliation(s)
- Johanna Samulin Erdem
- Department of Chemical and Biological Work Environment, National Institute of Occupational Health, Oslo, Norway
| | - Yke Jildouw Arnoldussen
- Department of Chemical and Biological Work Environment, National Institute of Occupational Health, Oslo, Norway
| | - Vidar Skaug
- Department of Chemical and Biological Work Environment, National Institute of Occupational Health, Oslo, Norway
| | - Aage Haugen
- Department of Chemical and Biological Work Environment, National Institute of Occupational Health, Oslo, Norway
| | - Shanbeh Zienolddiny
- Department of Chemical and Biological Work Environment, National Institute of Occupational Health, Oslo, Norway
| |
Collapse
|
34
|
Saha R, Knapp S, Chakraborty D, Horovitz O, Albrecht A, Kriebel M, Kaphzan H, Ehrlich I, Volkmer H, Richter-Levin G. GABAergic Synapses at the Axon Initial Segment of Basolateral Amygdala Projection Neurons Modulate Fear Extinction. Neuropsychopharmacology 2017; 42:473-484. [PMID: 27634356 PMCID: PMC5399240 DOI: 10.1038/npp.2016.205] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 08/18/2016] [Accepted: 08/22/2016] [Indexed: 11/09/2022]
Abstract
Inhibitory synaptic transmission in the amygdala has a pivotal role in fear learning and its extinction. However, the local circuits formed by GABAergic inhibitory interneurons within the amygdala and their detailed function in shaping these behaviors are not well understood. Here we used lentiviral-mediated knockdown of the cell adhesion molecule neurofascin in the basolateral amygdala (BLA) to specifically remove inhibitory synapses at the axon initial segment (AIS) of BLA projection neurons. Quantitative analysis of GABAergic synapse markers and measurement of miniature inhibitory postsynaptic currents in BLA projection neurons after neurofascin knockdown ex vivo confirmed the loss of GABAergic input. We then studied the impact of this manipulation on anxiety-like behavior and auditory cued fear conditioning and its extinction as BLA related behavioral paradigms, as well as on long-term potentiation (LTP) in the ventral subiculum-BLA pathway in vivo. BLA knockdown of neurofascin impaired ventral subiculum-BLA-LTP. While this manipulation did not affect anxiety-like behavior and fear memory acquisition and consolidation, it specifically impaired extinction. Our findings indicate that modification of inhibitory synapses at the AIS of BLA projection neurons is sufficient to selectively impair extinction behavior. A better understanding of the role of distinct GABAergic synapses may provide novel and more specific targets for therapeutic interventions in extinction-based therapies.
Collapse
Affiliation(s)
- Rinki Saha
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Stephanie Knapp
- Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany,Centre for Integrative Neuroscience, University of Tübingen, Tübingen, Germany,Graduate School for Neural and Behavioral Science, University of Tübingen, Tübingen, Germany
| | | | - Omer Horovitz
- Department of Psychology, University of Haifa, Haifa, Israel
| | - Anne Albrecht
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel,The Institute for the Study of Affective Neuroscience, University of Haifa, Haifa, Israel
| | - Martin Kriebel
- NMI Natural and Medical Sciences Institute, University of Tübingen, Reutlingen, Germany
| | - Hanoch Kaphzan
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel
| | - Ingrid Ehrlich
- Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany,Centre for Integrative Neuroscience, University of Tübingen, Tübingen, Germany
| | - Hansjürgen Volkmer
- NMI Natural and Medical Sciences Institute, University of Tübingen, Reutlingen, Germany
| | - Gal Richter-Levin
- Sagol Department of Neurobiology, University of Haifa, Haifa, Israel,Department of Psychology, University of Haifa, Haifa, Israel,The Institute for the Study of Affective Neuroscience, University of Haifa, Haifa, Israel,Sagol Department of Neurobiology, University of Haifa, Abba Khoushy Avenue 199, Haifa 31905, Israel, Tel: +972 48240962, Fax: +972 48288578, E-mail:
| |
Collapse
|
35
|
Murphy E, Benítez-Burraco A. Bridging the Gap between Genes and Language Deficits in Schizophrenia: An Oscillopathic Approach. Front Hum Neurosci 2016; 10:422. [PMID: 27601987 PMCID: PMC4993770 DOI: 10.3389/fnhum.2016.00422] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 08/08/2016] [Indexed: 12/11/2022] Open
Abstract
Schizophrenia is characterized by marked language deficits, but it is not clear how these deficits arise from the alteration of genes related to the disease. The goal of this paper is to aid the bridging of the gap between genes and schizophrenia and, ultimately, give support to the view that the abnormal presentation of language in this condition is heavily rooted in the evolutionary processes that brought about modern language. To that end we will focus on how the schizophrenic brain processes language and, particularly, on its distinctive oscillatory profile during language processing. Additionally, we will show that candidate genes for schizophrenia are overrepresented among the set of genes that are believed to be important for the evolution of the human faculty of language. These genes crucially include (and are related to) genes involved in brain rhythmicity. We will claim that this translational effort and the links we uncover may help develop an understanding of language evolution, along with the etiology of schizophrenia, its clinical/linguistic profile, and its high prevalence among modern populations.
Collapse
Affiliation(s)
- Elliot Murphy
- Division of Psychology and Language Sciences, University College London London, UK
| | | |
Collapse
|
36
|
Palavicini JP, Wang C, Chen L, Ahmar S, Higuera JD, Dupree JL, Han X. Novel molecular insights into the critical role of sulfatide in myelin maintenance/function. J Neurochem 2016; 139:40-54. [PMID: 27417284 DOI: 10.1111/jnc.13738] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 06/17/2016] [Accepted: 06/22/2016] [Indexed: 01/19/2023]
Abstract
Cerebroside sulfotransferase (CST) catalyzes the production of sulfatide, a major class of myelin-specific lipids. CST knockout (CST(-/-) ) mice in which sulfatide is completely depleted are born healthy, but display myelin abnormalities and progressive tremors starting at 4-6 weeks of age. Although these phenotypes suggest that sulfatide plays a critical role in myelin maintenance/function, the underlying mechanisms remain largely unknown. We analyzed the major CNS myelin proteins and the major lipids enriched in the myelin in a spatiotemporal manner. We found a one-third reduction of the major compact myelin proteins (myelin basic protein, myelin basic protein, and proteolipid protein, PLP) and an equivalent post-developmental loss of myelin lipids, providing the molecular basis behind the thinner myelin sheaths. Our lipidomics data demonstrated that the observed global reduction of myelin lipid content was not because of an increase of lipid degradation but rather to the reduction of their synthesis by oligodendrocytes. We also showed that sulfatide depletion leads to region-specific effects on non-compact myelin, dramatically affecting the paranode (neurofascin 155) and the major inner tongue myelin protein (myelin-associated glycoprotein). Moreover, we demonstrated that sulfatide promotes the interaction between adjacent PLP extracellular domains, evidenced by a progressive decline of high molecular weight PLP complexes in CST(-/-) mice, providing an explanation at a molecular level regarding the uncompacted myelin sheaths. Finally, we proposed that the dramatic losses of neurofascin 155 and PLP interactions are responsible for the progressive tremors and eventual ataxia. In summary, we unraveled novel molecular insights into the critical role of sulfatide in myelin maintenance/function. Cerebroside sulfotransferase (CST) catalyzes the production of sulfatide, a major class of myelin-specific lipids. CST knockout (CST(-/-) ) mice in which sulfatide is completely depleted are born healthy, but display myelin abnormalities We show in our study that sulfatide depletion leads to losses of myelin proteins and lipids, and impairment of myelin functions, unraveling novel molecular insights into the critical role of sulfatide in myelin maintenance/function.
Collapse
Affiliation(s)
- Juan Pablo Palavicini
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida, USA
| | - Chunyan Wang
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida, USA
| | - Linyuan Chen
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida, USA
| | - Sareen Ahmar
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida, USA
| | - Juan Diego Higuera
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida, USA
| | - Jeffrey L Dupree
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, Virginia, USA.,Research Division, McGuire Veterans Affairs Medical Center, Richmond, Virginia, USA
| | - Xianlin Han
- Center for Metabolic Origins of Disease, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida, USA.
| |
Collapse
|
37
|
Selvan LDN, Sreenivasamurthy SK, Kumar S, Yelamanchi SD, Madugundu AK, Anil AK, Renuse S, Nair BG, Gowda H, Mathur PP, Satishchandra P, Shankar SK, Mahadevan A, Keshava Prasad TS. Characterization of host response to Cryptococcus neoformans through quantitative proteomic analysis of cryptococcal meningitis co-infected with HIV. MOLECULAR BIOSYSTEMS 2016; 11:2529-40. [PMID: 26181685 DOI: 10.1039/c5mb00187k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Cryptococcal meningitis is the most common opportunistic fungal infection causing morbidity and mortality (>60%) in HIV-associated immunocompromised individuals caused by Cryptococcus neoformans. Molecular mechanisms of cryptococcal infection in brain have been studied using experimental animal models and cell lines. There are limited studies for the molecular understanding of cryptococcal meningitis in human brain. The proteins involved in the process of invasion and infection in human brain still remains obscure. To this end we carried out mass spectrometry-based quantitative proteomics of frontal lobe brain tissues from cryptococcal meningitis patients and controls to identify host proteins that are associated with the pathogenesis of cryptococcal meningitis. We identified 317 proteins to be differentially expressed (≥2-fold) from a total of 3423 human proteins. We found proteins involved in immune response and signal transduction to be differentially expressed in response to cryptococcal infection in human brain. Immune response proteins including complement factors, major histocompatibility proteins, proteins previously known to be involved in fungal invasion to brain such as caveolin 1 and actin were identified to be differentially expressed in cryptococcal meningitis brain tissues co-infected with HIV. We also validated the expression status of 5 proteins using immunohistochemistry. Overexpression of major histocompatibility complexes, class I, B (HLA-B), actin alpha 2 smooth muscle aorta (ACTA2) and caveolin 1 (CAV1) and downregulation of peripheral myelin protein 2 (PMP2) and alpha crystallin B chain (CRYAB) in cryptococcal meningitis were confirmed by IHC-based validation experiments. This study provides the brain proteome profile of cryptococcal meningitis co-infected with HIV for a better understanding of the host response associated with the disease.
Collapse
|
38
|
Kamm C. New clinical insights into combined central and peripheral demyelination (CCPD). J Neurol Sci 2016; 364:27-8. [DOI: 10.1016/j.jns.2016.02.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 02/09/2016] [Indexed: 10/22/2022]
|
39
|
Leshchyns'ka I, Sytnyk V. Reciprocal Interactions between Cell Adhesion Molecules of the Immunoglobulin Superfamily and the Cytoskeleton in Neurons. Front Cell Dev Biol 2016; 4:9. [PMID: 26909348 PMCID: PMC4754453 DOI: 10.3389/fcell.2016.00009] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Accepted: 02/01/2016] [Indexed: 12/04/2022] Open
Abstract
Cell adhesion molecules of the immunoglobulin superfamily (IgSF) including the neural cell adhesion molecule (NCAM) and members of the L1 family of neuronal cell adhesion molecules play important functions in the developing nervous system by regulating formation, growth and branching of neurites, and establishment of the synaptic contacts between neurons. In the mature brain, members of IgSF regulate synapse composition, function, and plasticity required for learning and memory. The intracellular domains of IgSF cell adhesion molecules interact with the components of the cytoskeleton including the submembrane actin-spectrin meshwork, actin microfilaments, and microtubules. In this review, we summarize current data indicating that interactions between IgSF cell adhesion molecules and the cytoskeleton are reciprocal, and that while IgSF cell adhesion molecules regulate the assembly of the cytoskeleton, the cytoskeleton plays an important role in regulation of the functions of IgSF cell adhesion molecules. Reciprocal interactions between NCAM and L1 family members and the cytoskeleton and their role in neuronal differentiation and synapse formation are discussed in detail.
Collapse
Affiliation(s)
- Iryna Leshchyns'ka
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales Sydney, NSW, Australia
| | - Vladimir Sytnyk
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales Sydney, NSW, Australia
| |
Collapse
|
40
|
HDAC1/2-Dependent P0 Expression Maintains Paranodal and Nodal Integrity Independently of Myelin Stability through Interactions with Neurofascins. PLoS Biol 2015; 13:e1002258. [PMID: 26406915 PMCID: PMC4583457 DOI: 10.1371/journal.pbio.1002258] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Accepted: 08/19/2015] [Indexed: 12/16/2022] Open
Abstract
The pathogenesis of peripheral neuropathies in adults is linked to maintenance mechanisms that are not well understood. Here, we elucidate a novel critical maintenance mechanism for Schwann cell (SC)–axon interaction. Using mouse genetics, ablation of the transcriptional regulators histone deacetylases 1 and 2 (HDAC1/2) in adult SCs severely affected paranodal and nodal integrity and led to demyelination/remyelination. Expression levels of the HDAC1/2 target gene myelin protein zero (P0) were reduced by half, accompanied by altered localization and stability of neurofascin (NFasc)155, NFasc186, and loss of Caspr and septate-like junctions. We identify P0 as a novel binding partner of NFasc155 and NFasc186, both in vivo and by in vitro adhesion assay. Furthermore, we demonstrate that HDAC1/2-dependent P0 expression is crucial for the maintenance of paranodal/nodal integrity and axonal function through interaction of P0 with neurofascins. In addition, we show that the latter mechanism is impaired by some P0 mutations that lead to late onset Charcot-Marie-Tooth disease. The well-studied Schwann cell protein P0 is revealed to have an unsuspected function critical for the stability of paranodes and nodes in adult nerves. This function is specifically impaired by P0 mutations that lead to late-onset forms of Charcot-Marie-Tooth disease. Peripheral nerves consist mainly of axons and Schwann cells, which form myelin sheaths around axons. Peripheral neuropathies primarily affect axons, their myelin, or both. Etiologies are multiple: they can be inherited, autoimmune, infectious, metabolic (e.g., diabetes), or be due to tumors or toxic agents. However, the pathogenesis mechanisms of these disorders are not well understood. Here, we elucidate a novel critical mechanism in peripheral nerves for the stability of two adjacent structures of major importance for axonal function, the paranodes and nodes of Ranvier. We find that disruption of these structures causes a form of peripheral neuropathy. Ablation of the transcriptional regulators histone deacetylases (HDAC)1 and 2 in adult Schwann cells results in motor and sensory dysfunction, disruption of paranodal/nodal integrity, and loss of myelin. Expression of the HDAC1/2 target gene myelin protein zero (P0) was reduced by half, leading to altered localization of paranodal and nodal neurofascins, loss of paranodal Caspr, and impairment of axon–Schwann cell interaction in paranodal/nodal regions. We demonstrate that P0, the most abundant protein of peripheral compact myelin, extends to paranodes/nodes to maintain their stability by binding neurofascins. P0–neurofascins binding is affected by P0 mutations responsible for late onset forms of the inherited peripheral neuropathy Charcot-Marie-Tooth disease, identifying a pathogenesis mechanism of these disorders.
Collapse
|
41
|
Abstract
Parkinson's disease (PD) is an age-dependent neurodegenerative disease that often occurs in those over age 60. Although rodents and small animals have been used widely to model PD and investigate its pathology, their short life span makes it difficult to assess the aging-related pathology that is likely to occur in PD patient brains. Here, we used brain tissues from rhesus monkeys at 2-3, 7-8, and >15 years of age to examine the expression of Parkin, PINK1, and α-synuclein, which are known to cause PD via loss- or gain-of-function mechanisms. We found that α-synuclein is increased in the older monkey brains, whereas Parkin and PINK1 are decreased or remain unchanged. Because of the gain of toxicity of α-synuclein, we performed stereotaxic injection of lentiviral vectors expressing mutant α-synuclein (A53T) into the substantia nigra of monkeys and found that aging also increases the accumulation of A53T in neurites and its associated neuropathology. A53T also causes more extensive reactive astrocytes and axonal degeneration in monkey brain than in mouse brain. Using monkey brain tissues, we found that A53T interacts with neurofascin, an adhesion molecule involved in axon subcellular targeting and neurite outgrowth. Aged monkey brain tissues show an increased interaction of neurofascin with A53T. Overexpression of A53T causes neuritic toxicity in cultured neuronal cells, which can be attenuated by transfected neurofascin. These findings from nonhuman primate brains reveal age-dependent pathological and molecular changes that could contribute to the age-dependent neuropathology in PD.
Collapse
|
42
|
Nonaka T, Fujimoto T, Eguchi K, Fukuda Y, Yoshimura T. [A case of combined central and peripheral demyelination]. Rinsho Shinkeigaku 2015; 55:389-94. [PMID: 26103810 DOI: 10.5692/clinicalneurol.cn-000616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A 22-year-old man had had difficulty running fast since about he was 10 years old. In June 2011, he was referred to us because of worsened unsteady gait. A neurological examination revealed mild ataxic speech, weakness of the four limbs, with spasticity, and pes cavus. Magnetic resonance T2-weighted images showed multiple high-intensity lesions in the bilateral periventricular white matter, brainstem, and thoracic spinal cord. Peripheral nerve conduction studies revealed marked motor conduction velocities were markedly reduced and sensory nerve velocities were not evoked in the upper and lower limbs. A sural nerve biopsy showed highly active demyelinating lesions. The patient was treated with high-dose steroid therapy (intravenous methylprednisolone, 1,000 mg/day × 3 days) followed by self-injection of interferon β. With these treatments, his symptoms gradually improved. In this case, we could not detect the causative factors, and all autoantibodies tested, except for the anti-neurofascin antibody, were negative. The anti-neurofascin antibody might induce demyelination in the central and peripheral nervous systems. However, in the literature, the evidence of an association between this antibody and these clinical characteristics is not conclusive. We need more studies on the pathogenesis of combined central and peripheral demyelination to establish more effective therapies.
Collapse
|
43
|
Benítez-Burraco A, Boeckx C. Possible functional links among brain- and skull-related genes selected in modern humans. Front Psychol 2015; 6:794. [PMID: 26136701 PMCID: PMC4468360 DOI: 10.3389/fpsyg.2015.00794] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 05/26/2015] [Indexed: 12/12/2022] Open
Abstract
The sequencing of the genomes from extinct hominins has revealed that changes in some brain-related genes have been selected after the split between anatomically-modern humans and Neanderthals/Denisovans. To date, no coherent view of these changes has been provided. Following a line of research we initiated in Boeckx and Benítez-Burraco (2014a), we hypothesize functional links among most of these genes and their products, based on the existing literature for each of the gene discussed. The genes we focus on are found mutated in different cognitive disorders affecting modern populations and their products are involved in skull and brain morphology, and neural connectivity. If our hypothesis turns out to be on the right track, it means that the changes affecting most of these proteins resulted in a more globular brain and ultimately brought about modern cognition, with its characteristic generativity and capacity to form and exploit cross-modular concepts, properties most clearly manifested in language.
Collapse
Affiliation(s)
| | - Cedric Boeckx
- Catalan Institute for Research and Advanced Studies , Barcelona, Spain ; Department of Linguistics, Universitat de Barcelona , Barcelona, Spain
| |
Collapse
|
44
|
Dentate Gyrus Local Circuit is Implicated in Learning Under Stress--a Role for Neurofascin. Mol Neurobiol 2014; 53:842-850. [PMID: 25511445 DOI: 10.1007/s12035-014-9044-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 12/02/2014] [Indexed: 02/01/2023]
Abstract
The inhibitory synapses at the axon initial segment (AIS) of dentate gyrus granular cells are almost exclusively innervated by the axo-axonic chandelier interneurons. However, the role of chandelier neurons in local circuitry is poorly understood and controversially discussed. The cell adhesion molecule neurofascin is specifically expressed at the AIS. It is crucially required for the stabilization of axo-axonic synapses. Knockdown of neurofascin is therefore a convenient tool to interfere with chandelier input at the AIS of granular neurons of the dentate gyrus. In the current study, feedback and feedforward inhibition of granule cells was measured in the dentate gyrus after knockdown of neurofascin and concomitant reduction of axo-axonic input. Results show increased feedback inhibition as a result of neurofascin knockdown, while feedforward inhibition remained unaffected. This suggests that chandelier neurons are predominantly involved in feedback inhibition. Neurofascin knockdown rats also exhibited impaired learning under stress in the two-way shuttle avoidance task. Remarkably, this learning impairment was not accompanied by differences in electrophysiological measurements of dentate gyrus LTP. This indicates that the local circuit may be involved in (certain types) of learning.
Collapse
|
45
|
Boeckx C, Benítez-Burraco A. Globularity and language-readiness: generating new predictions by expanding the set of genes of interest. Front Psychol 2014; 5:1324. [PMID: 25505436 PMCID: PMC4243498 DOI: 10.3389/fpsyg.2014.01324] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 10/31/2014] [Indexed: 12/30/2022] Open
Abstract
This study builds on the hypothesis put forth in Boeckx and Benítez-Burraco (2014), according to which the developmental changes expressed at the levels of brain morphology and neural connectivity that resulted in a more globular braincase in our species were crucial to understand the origins of our language-ready brain. Specifically, this paper explores the links between two well-known 'language-related' genes like FOXP2 and ROBO1 implicated in vocal learning and the initial set of genes of interest put forth in Boeckx and Benítez-Burraco (2014), with RUNX2 as focal point. Relying on the existing literature, we uncover potential molecular links that could be of interest to future experimental inquiries into the biological foundations of language and the testing of our initial hypothesis. Our discussion could also be relevant for clinical linguistics and for the interpretation of results from paleogenomics.
Collapse
Affiliation(s)
- Cedric Boeckx
- Catalan Institute for Advanced Studies and Research (ICREA)Barcelona, Spain
- Department of Linguistics, Universitat de BarcelonaBarcelona, Spain
| | | |
Collapse
|
46
|
Hsu WCJ, Nilsson CL, Laezza F. Role of the axonal initial segment in psychiatric disorders: function, dysfunction, and intervention. Front Psychiatry 2014; 5:109. [PMID: 25191280 PMCID: PMC4139700 DOI: 10.3389/fpsyt.2014.00109] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Accepted: 08/06/2014] [Indexed: 12/22/2022] Open
Abstract
The progress of developing effective interventions against psychiatric disorders has been limited due to a lack of understanding of the underlying cellular and functional mechanisms. Recent research findings focused on exploring novel causes of psychiatric disorders have highlighted the importance of the axonal initial segment (AIS), a highly specialized neuronal structure critical for spike initiation of the action potential. In particular, the role of voltage-gated sodium channels, and their interactions with other protein partners in a tightly regulated macromolecular complex has been emphasized as a key component in the regulation of neuronal excitability. Deficits and excesses of excitability have been linked to the pathogenesis of brain disorders. Identification of the factors and regulatory pathways involved in proper AIS function, or its disruption, can lead to the development of novel interventions that target these mechanistic interactions, increasing treatment efficacy while reducing deleterious off-target effects for psychiatric disorders.
Collapse
Affiliation(s)
- Wei-Chun Jim Hsu
- Department of Biochemistry and Molecular Biology, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
- Graduate Program in Biochemistry and Molecular Biology, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
- M.D.–Ph.D. Combined Degree Program, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
| | - Carol Lynn Nilsson
- Department of Pharmacology and Toxicology, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
- Sealy Center for Molecular Medicine, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
| | - Fernanda Laezza
- Department of Pharmacology and Toxicology, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
- Center for Addiction Research, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
- Center for Biomedical Engineering, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
- Mitchell Center for Neurodegenerative Diseases, The University of Texas Medical Branch at Galveston, Galveston, TX, USA
| |
Collapse
|
47
|
Riksen EA, Landin MA, Reppe S, Nakamura Y, Lyngstadaas SP, Reseland JE. Enamel matrix derivative promote primary human pulp cell differentiation and mineralization. Int J Mol Sci 2014; 15:7731-49. [PMID: 24857913 PMCID: PMC4057702 DOI: 10.3390/ijms15057731] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 03/26/2014] [Accepted: 04/14/2014] [Indexed: 11/16/2022] Open
Abstract
Enamel matrix derivative (EMD) has been found to induce reactive dentin formation; however the molecular mechanisms involved are unclear. The effect of EMD (5–50 μg/mL) on primary human pulp cells were compared to untreated cells and cells incubated with 10−8 M dexamethasone (DEX) for 1, 2, 3, 7, and 14 days in culture. Expression analysis using Affymetrix microchips demonstrated that 10 μg/mL EMD regulated several hundred genes and stimulated the gene expression of proteins involved in mesenchymal proliferation and differentiation. Both EMD and DEX enhanced the expression of amelogenin (amel), and the dentinogenic markers dentin sialophosphoprotein (DSSP) and dentin matrix acidic phosphoprotein 1 (DMP1), as well as the osteogenic markers osteocalcin (OC, BGLAP) and collagen type 1 (COL1A1). Whereas, only EMD had effect on alkaline phosphatase (ALP) mRNA expression, the stimulatory effect were verified by enhanced secretion of OC and COL1A from EMD treated cells, and increased ALP activity in cell culture medium after EMD treatment. Increased levels of interleukin-6 (IL-6), interleukin-8 (IL-8), and monocyte chemoattractant proteins (MCP-1) in the cell culture medium were also found. Consequently, the suggested effect of EMD is to promote differentiation of pulp cells and increases the potential for pulpal mineralization to favor reactive dentine formation.
Collapse
Affiliation(s)
- Elisabeth Aurstad Riksen
- Department of Biomaterials, Institute for Clinical Dentistry, University of Oslo, Blindern, N-0317 Oslo, Norway.
| | - Maria A Landin
- Department of Biomaterials, Institute for Clinical Dentistry, University of Oslo, Blindern, N-0317 Oslo, Norway.
| | - Sjur Reppe
- Department of Medical Biochemistry, Oslo University Hospital, N-0450 Oslo, Norway.
| | - Yukio Nakamura
- Department of Biomaterials, Institute for Clinical Dentistry, University of Oslo, Blindern, N-0317 Oslo, Norway.
| | - Ståle Petter Lyngstadaas
- Department of Biomaterials, Institute for Clinical Dentistry, University of Oslo, Blindern, N-0317 Oslo, Norway.
| | - Janne E Reseland
- Department of Biomaterials, Institute for Clinical Dentistry, University of Oslo, Blindern, N-0317 Oslo, Norway.
| |
Collapse
|
48
|
Lucchese G, Capone G, Kanduc D. Peptide sharing between influenza A H1N1 hemagglutinin and human axon guidance proteins. Schizophr Bull 2014; 40:362-75. [PMID: 23378012 PMCID: PMC3932078 DOI: 10.1093/schbul/sbs197] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Epidemiologic data suggest that maternal microbial infections may cause fetal neurodevelopmental disorders, potentially increasing susceptibility to heavy psychopathologies such as schizophrenia, schizophreniform disorder, autism, pervasive developmental disorders, bipolar disorders, psychosis, epilepsy, language and speech disorders, and cognitive impairment in adult offspring. However, the molecular pathomechanisms underlying such a relationship are not clear. Here we analyze the potential role of the maternal immune response to viral infection in determining fetal brain injuries that increase the risk of neurological disorders in the adult. We use influenza infection as a disease model and human axon guidance pathway, a key process in the formation of neural network during midgestation, as a potential fetal target of immune insults. Specifically, we examined influenza A H1N1 hemagglutinin (HA), an antigenic viral protein, for amino acid sequence similarity to a random library of 188 axon guidance proteins. We obtain the results that (1) contrary to any theoretical expectations, 45 viral pentapeptide matches are distributed throughout a subset of 36 guidance molecules; (2) in 24 guidance proteins, the peptide sharing with HA antigen involves already experimentally validated influenza HA epitopes; and (3) most of the axon guidance vs HA peptide overlap is conserved among influenza A viral strains and subsets. Taken together, our data indicate that immune cross-reactivity between influenza HA and axon guidance molecules is possible and may well represent a pathologic mechanism capable of determining neurodevelopmental disruption in the fetus.
Collapse
Affiliation(s)
- Guglielmo Lucchese
- To whom correspondence should be addressed; tel: +39.080.544.3321, fax: +39.080.544.3317, e-mail:
| | - Giovanni Capone
- Department of Biosciences, Biotechnologies and Pharmacological Sciences, University of Bari, Bari, Italy
| | - Darja Kanduc
- Department of Biosciences, Biotechnologies and Pharmacological Sciences, University of Bari, Bari, Italy,To whom correspondence should be addressed; tel: +39.080.544.3321, fax: +39.080.544.3317, e-mail:
| |
Collapse
|
49
|
Akane H, Saito F, Shiraki A, Imatanaka N, Akahori Y, Itahashi M, Wang L, Shibutani M. Gene expression profile of brain regions reflecting aberrations in nervous system development targeting the process of neurite extension of rat offspring exposed developmentally to glycidol. J Appl Toxicol 2014; 34:1389-99. [DOI: 10.1002/jat.2971] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Revised: 11/07/2013] [Accepted: 11/07/2013] [Indexed: 01/09/2023]
Affiliation(s)
- Hirotoshi Akane
- Laboratory of Veterinary Pathology; Tokyo University of Agriculture and Technology; 3-5-8 Saiwai-cho, Fuchu-shi Tokyo 183-8509 Japan
| | - Fumiyo Saito
- Chemicals Evaluation and Research Institute; Japan, 1-4-25 Koraku, Bunkyo-ku Tokyo 112-0004 Japan
| | - Ayako Shiraki
- Laboratory of Veterinary Pathology; Tokyo University of Agriculture and Technology; 3-5-8 Saiwai-cho, Fuchu-shi Tokyo 183-8509 Japan
- Pathogenetic Veterinary Science, United Graduate School of Veterinary Sciences; Gifu University; 1-1 Yanagido, Gifu-shi Gifu 501-1193 Japan
| | - Nobuya Imatanaka
- Chemicals Evaluation and Research Institute; Japan, 1-4-25 Koraku, Bunkyo-ku Tokyo 112-0004 Japan
| | - Yumi Akahori
- Chemicals Evaluation and Research Institute; Japan, 1-4-25 Koraku, Bunkyo-ku Tokyo 112-0004 Japan
| | - Megu Itahashi
- Laboratory of Veterinary Pathology; Tokyo University of Agriculture and Technology; 3-5-8 Saiwai-cho, Fuchu-shi Tokyo 183-8509 Japan
- Pathogenetic Veterinary Science, United Graduate School of Veterinary Sciences; Gifu University; 1-1 Yanagido, Gifu-shi Gifu 501-1193 Japan
| | - Liyun Wang
- Laboratory of Veterinary Pathology; Tokyo University of Agriculture and Technology; 3-5-8 Saiwai-cho, Fuchu-shi Tokyo 183-8509 Japan
| | - Makoto Shibutani
- Laboratory of Veterinary Pathology; Tokyo University of Agriculture and Technology; 3-5-8 Saiwai-cho, Fuchu-shi Tokyo 183-8509 Japan
| |
Collapse
|
50
|
Ebel J, Beuter S, Wuchter J, Kriebel M, Volkmer H. Organisation and Control of Neuronal Connectivity and Myelination by Cell Adhesion Molecule Neurofascin. ADVANCES IN NEUROBIOLOGY 2014; 8:231-47. [DOI: 10.1007/978-1-4614-8090-7_10] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|