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Bocchetta M, Todd EG, Bouzigues A, Cash DM, Nicholas JM, Convery RS, Russell LL, Thomas DL, Malone IB, Iglesias JE, van Swieten JC, Jiskoot LC, Seelaar H, Borroni B, Galimberti D, Sanchez-Valle R, Laforce R, Moreno F, Synofzik M, Graff C, Masellis M, Tartaglia MC, Rowe JB, Vandenberghe R, Finger E, Tagliavini F, de Mendonça A, Santana I, Butler CR, Ducharme S, Gerhard A, Danek A, Levin J, Otto M, Sorbi S, Le Ber I, Pasquier F, Rohrer JD, Esteve AS, Nelson A, Heller C, Greaves CV, Benotmane H, Zetterberg H, Swift IJ, Samra K, Shafei R, Timberlake C, Cope T, Rittman T, Benussi A, Premi E, Gasparotti R, Archetti S, Gazzina S, Cantoni V, Arighi A, Fenoglio C, Scarpini E, Fumagalli G, Borracci V, Rossi G, Giaccone G, Di Fede G, Caroppo P, Tiraboschi P, Prioni S, Redaelli V, Tang-Wai D, Rogaeva E, Castelo-Branco M, Freedman M, Keren R, Black S, Mitchell S, Shoesmith C, Bartha R, Rademakers R, Poos J, Papma JM, Giannini L, van Minkelen R, Pijnenburg Y, Nacmias B, Ferrari C, Polito C, Lombardi G, Bessi V, Veldsman M, Andersson C, Thonberg H, Öijerstedt L, Jelic V, Thompson P, Langheinrich T, Lladó A, Antonell A, Olives J, Balasa M, Bargalló N, Borrego-Ecija S, Verdelho A, Maruta C, Ferreira CB, Miltenberger G, do Couto FS, Gabilondo A, Gorostidi A, Villanua J, Cañada M, Tainta M, Zulaica M, Barandiaran M, Alves P, Bender B, Wilke C, Graf L, Vogels A, Vandenbulcke M, Van Damme P, Bruffaerts R, Poesen K, Rosa-Neto P, Gauthier S, Camuzat A, Brice A, Bertrand A, Funkiewiez A, Rinaldi D, Saracino D, Colliot O, Sayah S, Prix C, Wlasich E, Wagemann O, Loosli S, Schönecker S, Hoegen T, Lombardi J, Anderl-Straub S, Rollin A, Kuchcinski G, Bertoux M, Lebouvier T, Deramecourt V, Santiago B, Duro D, Leitão MJ, Almeida MR, Tábuas-Pereira M, Afonso S. Structural MRI predicts clinical progression in presymptomatic genetic frontotemporal dementia: findings from the GENetic Frontotemporal dementia Initiative (GENFI) cohort. Brain Commun 2023; 5:fcad061. [PMID: 36970046 PMCID: PMC10036293 DOI: 10.1093/braincomms/fcad061] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/22/2022] [Accepted: 03/08/2023] [Indexed: 03/12/2023] Open
Abstract
Abstract
Biomarkers that can predict disease progression in individuals with genetic frontotemporal dementia are urgently needed. We aimed to identify whether baseline MRI-based grey and white matter abnormalities are associated with different clinical progression profiles in presymptomatic mutation carriers in the GENetic Frontotemporal dementia Initiative.
387 mutation carriers were included (160 GRN, 160 C9orf72, 67 MAPT), together with 240 non-carrier cognitively normal controls. Cortical and subcortical grey matter volumes were generated using automated parcellation methods on volumetric 3 T T1-weighted MRI scans, while white matter characteristics were estimated using diffusion tensor imaging. Mutation carriers were divided into two disease stages based on their global CDR®+NACC-FTLD score: presymptomatic (0 or 0.5) and fully symptomatic (1 or greater). W-scores in each grey matter volumes and white matter diffusion measures were computed to quantify the degree of abnormality compared to controls for each presymptomatic carrier, adjusting for their age, sex, total intracranial volume, and scanner type. Presymptomatic carriers were classified as “normal” or “abnormal” based on whether their grey matter volume and white matter diffusion measure w-scores were above or below the cut point corresponding to the 10th percentile of the controls. We then compared the change in disease severity between baseline and one year later in both the “normal” and “abnormal” groups within each genetic subtype, as measured by the CDR®+NACC-FTLD sum-of-boxes score and revised Cambridge Behavioural Inventory total score.
Overall, presymptomatic carriers with normal regional w-scores at baseline did not progress clinically as much as those with abnormal regional w-scores. Having abnormal grey or white matter measures at baseline was associated with a statistically significant increase in the CDR®+NACC-FTLD of up to 4 points in C9orf72 expansion carriers, and 5 points in the GRN group as well as a statistically significant increase in the revised Cambridge Behavioural Inventory of up to 11 points in MAPT, 10 points in GRN, and 8 points in C9orf72 mutation carriers.
Baseline regional brain abnormalities on MRI in presymptomatic mutation carriers are associated with different profiles of clinical progression over time. These results may be helpful to inform stratification of participants in future trials.
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Affiliation(s)
- Martina Bocchetta
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London , London , United Kingdom
- Centre for Cognitive and Clinical Neuroscience, Division of Psychology, Department of Life Sciences, College of Health, Medicine and Life Sciences, Brunel University London , London , United Kingdom
| | - Emily G Todd
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London , London , United Kingdom
| | - Arabella Bouzigues
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London , London , United Kingdom
| | - David M Cash
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London , London , United Kingdom
- Centre for Medical Image Computing, Department of Medical Physics and Biomedical Engineering, University College London , London , United Kingdom
| | - Jennifer M Nicholas
- Department of Medical Statistics, London School of Hygiene and Tropical Medicine , London , United Kingdom
| | - Rhian S Convery
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London , London , United Kingdom
| | - Lucy L Russell
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London , London , United Kingdom
| | - David L Thomas
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London , London , United Kingdom
- Neuroradiological Academic Unit, Department of Brain Repair and Rehabilitation, UCL Queen Square Institute of Neurology, University College London , London , United Kingdom
| | - Ian B Malone
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London , London , United Kingdom
| | - Juan Eugenio Iglesias
- Centre for Medical Image Computing, Department of Medical Physics and Biomedical Engineering, University College London , London , United Kingdom
- Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School , Charlestown, MA , USA
- Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology , Cambridge, MA , USA
| | - John C van Swieten
- Department of Neurology and Alzheimer center, Erasmus Medical Center Rotterdam , Rotterdam , the Netherlands
| | - Lize C Jiskoot
- Department of Neurology and Alzheimer center, Erasmus Medical Center Rotterdam , Rotterdam , the Netherlands
| | - Harro Seelaar
- Department of Neurology and Alzheimer center, Erasmus Medical Center Rotterdam , Rotterdam , the Netherlands
| | - Barbara Borroni
- Centre for Neurodegenerative Disorders, Neurology Unit, Department of Clinical and Experimental Sciences, University of Brescia , Brescia , Italy
| | - Daniela Galimberti
- Department of Biomedical, Surgical and Dental Sciences, University of Milan , Milan , Italy
- Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico , Milan , Italy
| | - Raquel Sanchez-Valle
- Neurology Department, Hospital Clinic, Institut d’Investigacions Biomèdiques , Barcelona , Spain
| | - Robert Laforce
- Clinique Interdisciplinaire de Mémoire, Département des Sciences Neurologiques, CHU de Québec, Faculté de Médecine, Université Laval , Québec , Canada
| | - Fermin Moreno
- Hospital Universitario Donostia , San Sebastian , Spain
| | - Matthis Synofzik
- Division Translational Genomics of Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research (HIH), University of Tübingen , Tübingen , Germany
- German Center for Neurodegenerative Diseases (DZNE) , Tübingen , Germany
| | - Caroline Graff
- Karolinska Institutet, Department NVS, Division of Neurogeriatrics , Stockholm , Sweden
- Unit for Hereditary Dementia, Theme Aging, Karolinska University Hospital-Solna Stockholm , Stockholm , Sweden
| | - Mario Masellis
- Campbell Cognitive Neurology Research Unit, Sunnybrook Research Institute , Toronto, ON , Canada
| | - Maria Carmela Tartaglia
- Toronto Western Hospital, Tanz Centre for Research in Neurodegenerative Disease , Toronto, ON , Canada
| | - James B Rowe
- Department of Clinical Neurosciences and Cambridge University Hospitals NHS Trust and Medical Research Council Cognition and brain Sciences Unit, University of Cambridge , Cambridge , United Kingdom
| | - Rik Vandenberghe
- Laboratory for Cognitive Neurology, Department of Neurosciences , KU Leuven, Leuven , Belgium
| | - Elizabeth Finger
- Department of Clinical Neurological Sciences, University of Western Ontario , London, ON , Canada
| | - Fabrizio Tagliavini
- Fondazione Istituto di Ricovero e Cura a Carattere Scientifico, Istituto Neurologico Carlo Besta , Milan , Italy
| | | | - Isabel Santana
- Neurology Department, Centro Hospitalar e Universitário de Coimbra , Coimbra , Portugal
| | - Chris R Butler
- Department of Clinical Neurology, University of Oxford , Oxford , United Kingdom
| | - Simon Ducharme
- Department of Neurology and Neurosurgery, McGill University , Montreal, Quebec , Canada
| | - Alexander Gerhard
- Division of Neuroscience and Experimental Psychology, Wolfson Molecular Imaging Centre, University of Manchester , Manchester , United Kingdom
- Departments of Geriatric Medicine and Nuclear Medicine, University of Duisburg-Essen , Essen , Germany
| | - Adrian Danek
- Neurologische Klinik und Poliklinik, Ludwig-Maximilians-Universität, Munich; German Center for Neurodegenerative Diseases (DZNE) , Munich; Munich Cluster of Systems Neurology, Munich , Germany
| | - Johannes Levin
- Neurologische Klinik und Poliklinik, Ludwig-Maximilians-Universität, Munich; German Center for Neurodegenerative Diseases (DZNE) , Munich; Munich Cluster of Systems Neurology, Munich , Germany
| | - Markus Otto
- Department of Neurology, University Hospital Ulm , Ulm , Germany
| | - Sandro Sorbi
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence , Florence , Italy
- IRCCS Fondazione Don Carlo Gnocchi , Florence , Italy
| | - Isabelle Le Ber
- Sorbonne Université, Paris Brain Institute – Institut du Cerveau– ICM , Inserm U1127, CNRS UMR 7225, AP-HP - Hôpital Pitié-Salpêtrière, Paris , France
- Centre deréférence des démences rares ou précoces , IM2A, Département de Neurologie, AP-HP - Hôpital Pitié-Salpêtrière, Paris , France
- Département de Neurologie, AP-HP - Hôpital Pitié-Salpêtrière , Paris , France
| | - Florence Pasquier
- Univ Lille , Lille , France
- Inserm 1172 , Lille , France
- CHU, CNR-MAJ, Labex Distalz, LiCENDLille , Lille , France
| | - Jonathan D Rohrer
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London , London , United Kingdom
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Bouzigues A, Russell LL, Peakman G, Bocchetta M, Greaves CV, Convery RS, Todd E, Rowe JB, Borroni B, Galimberti D, Tiraboschi P, Masellis M, Tartaglia MC, Finger E, van Swieten JC, Seelaar H, Jiskoot L, Sorbi S, Butler CR, Graff C, Gerhard A, Langheinrich T, Laforce R, Sanchez-Valle R, de Mendonça A, Moreno F, Synofzik M, Vandenberghe R, Ducharme S, Le Ber I, Levin J, Danek A, Otto M, Pasquier F, Santana I, Rohrer JD, Nelson A, Bouzigues A, Heller C, Greaves CV, Cash D, Thomas DL, Todd E, Benotmane H, Zetterberg H, Swift IJ, Nicholas J, Samra K, Russell LL, Bocchetta M, Shafei R, Convery RS, Timberlake C, Cope T, Rittman T, Benussi A, Premi E, Gasparotti R, Archetti S, Gazzina S, Cantoni V, Arighi A, Fenoglio C, Scarpini E, Fumagalli G, Borracci V, Rossi G, Giaccone G, Caroppo P, Tiraboschi P, Prioni S, Redaelli V, Tang-Wai D, Rogaeva E, Castelo-Branco M, Keren R, Black S, Mitchell S, Shoesmith C, Bartha R, Rademakers R, Poos J, Papma JM, Giannini L, Minkelen R, Pijnenburg Y, Nacmias B, Ferrari C, Polito C, Lombardi G, Bessi V, Veldsman M, Andersson C, Thonberg H, Öijerstedt L, Jelic V, Thompson P, Langheinrich T, Lladó A, Antonell A, Olives J, Balasa M, Bargalló N, Borrego-Ecija S, Verdelho A, Maruta C, Ferreira CB, Miltenberger G, do Couto FS, Gabilondo A, Gorostidi A, Villanua J, Cañada M, Tainta M, Zulaica M, Barandiaran M, Alves P, Bender B, Wilke C, Graf L, Vogels A, Vandenbulcke M, Van Damme P, Bruffaerts R, Poesen K, Rosa-Neto P, Gauthier S, Camuzat A, Brice A, Bertrand A, Funkiewiez A, Rinaldi D, Saracino D, Colliot O, Sayah S, Prix C, Wlasich E, Wagemann O, Loosli S, Schönecker S, Hoegen T, Lombardi J, Anderl-Straub S, Rollin A, Kuchcinski G, Bertoux M, Lebouvier T, Deramecourt V, Santiago B, Duro D, Leitão MJ, Almeida MR, Tábuas-Pereira M, Afonso S, Engel A, Polyakova M. Anomia is present pre-symptomatically in frontotemporal dementia due to MAPT mutations. J Neurol 2022; 269:4322-4332. [PMID: 35348856 PMCID: PMC9294015 DOI: 10.1007/s00415-022-11068-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 03/04/2022] [Accepted: 03/06/2022] [Indexed: 11/29/2022]
Abstract
INTRODUCTION A third of frontotemporal dementia (FTD) is caused by an autosomal-dominant genetic mutation in one of three genes: microtubule-associated protein tau (MAPT), chromosome 9 open reading frame 72 (C9orf72) and progranulin (GRN). Prior studies of prodromal FTD have identified impaired executive function and social cognition early in the disease but few have studied naming in detail. METHODS We investigated performance on the Boston Naming Test (BNT) in the GENetic Frontotemporal dementia Initiative cohort of 499 mutation carriers and 248 mutation-negative controls divided across three genetic groups: C9orf72, MAPT and GRN. Mutation carriers were further divided into 3 groups according to their global CDR plus NACC FTLD score: 0 (asymptomatic), 0.5 (prodromal) and 1 + (fully symptomatic). Groups were compared using a bootstrapped linear regression model, adjusting for age, sex, language and education. Finally, we identified neural correlates of anomia within carriers of each genetic group using a voxel-based morphometry analysis. RESULTS All symptomatic groups performed worse on the BNT than controls with the MAPT symptomatic group scoring the worst. Furthermore, MAPT asymptomatic and prodromal groups performed significantly worse than controls. Correlates of anomia in MAPT mutation carriers included bilateral anterior temporal lobe regions and the anterior insula. Similar bilateral anterior temporal lobe involvement was seen in C9orf72 mutation carriers as well as more widespread left frontal atrophy. In GRN mutation carriers, neural correlates were limited to the left hemisphere, and involved frontal, temporal, insula and striatal regions. CONCLUSION This study suggests the development of early anomia in MAPT mutation carriers, likely to be associated with impaired semantic knowledge. Clinical trials focused on the prodromal period within individuals with MAPT mutations should use language tasks, such as the BNT for patient stratification and as outcome measures.
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Affiliation(s)
- Arabella Bouzigues
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Lucy L Russell
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Georgia Peakman
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Martina Bocchetta
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Caroline V Greaves
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Rhian S Convery
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Emily Todd
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - James B Rowe
- Trust and Medical Research Council Cognition and Brain Sciences Unit, Department of Clinical Neurosciences and Cambridge University Hospitals NHS, University of Cambridge, Cambridge, UK
| | - Barbara Borroni
- Centre for Neurodegenerative Disorders, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
| | - Daniela Galimberti
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy.,Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | | | - Mario Masellis
- Sunnybrook Health Sciences Centre, Sunnybrook Research Institute, University of Toronto, Toronto, Canada
| | - Maria Carmela Tartaglia
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, Canada
| | - Elizabeth Finger
- Department of Clinical Neurological Sciences, University of Western Ontario, London, ON, Canada
| | | | - Harro Seelaar
- Department of Neurology, Erasmus Medical Centre, Rotterdam, Netherlands
| | - Lize Jiskoot
- Department of Neurology, Erasmus Medical Centre, Rotterdam, Netherlands
| | - Sandro Sorbi
- Department of Neurofarba, University of Florence, Florence, Italy.,IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy
| | - Chris R Butler
- Nuffield Department of Clinical Neurosciences, Medical Sciences Division, University of Oxford, Oxford, UK.,Department of Brain Sciences, Imperial College London, London, UK
| | - Caroline Graff
- Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Bioclinicum, Karolinska Institutet, Solna, Sweden.,Unit for Hereditary Dementias, Theme Aging, Karolinska University Hospital, Solna, Sweden
| | - Alexander Gerhard
- Division of Neuroscience and Experimental Psychology, Wolfson Molecular Imaging Centre, University of Manchester, Manchester, UK.,Departments of Geriatric Medicine and Nuclear Medicine, University of Duisburg, Essen, Germany
| | - Tobias Langheinrich
- Division of Neuroscience and Experimental Psychology, Wolfson Molecular Imaging Centre, University of Manchester, Manchester, UK.,Cerebral Function Unit, Manchester Centre for Clinical Neurosciences, Salford Royal NHS Foundation Trust, Salford, UK
| | - Robert Laforce
- Département Des Sciences Neurologiques, Clinique Interdisciplinaire de Mémoire, CHU de Québec, and Faculté de Médecine, Université Laval, Québec, QC, Canada
| | - Raquel Sanchez-Valle
- Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Service, Hospital Clínic, Institut d'Investigacións Biomèdiques August Pi I Sunyer, University of Barcelona, Barcelona, Spain
| | | | - Fermin Moreno
- Cognitive Disorders Unit, Department of Neurology, Donostia University Hospital, San Sebastian, Gipuzkoa, Spain.,Neuroscience Area, Biodonostia Health Research Institute, Gipuzkoa, San Sebastian, Spain
| | - Matthis Synofzik
- Department of Neurodegenerative Diseases, Hertie-Institute for Clinical Brain Research and Center of Neurology, University of Tübingen, Tübingen, Germany.,Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Rik Vandenberghe
- Laboratory for Cognitive Neurology, Department of Neurosciences, KU Leuven, Leuven, Belgium.,Neurology Service, University Hospitals Leuven, Leuven, Belgium.,Leuven Brain Institute, KU Leuven, Leuven, Belgium
| | - Simon Ducharme
- Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montreal, Canada.,Department of Neurology & Neurosurgery, McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Isabelle Le Ber
- Paris Brain Institute - Institut du Cerveau - ICM, Inserm U1127, CNRS UMR 7225, Sorbonne Université, AP-HP - Hôpital Pitié-Salpêtrière, Paris, France.,Centre de Référence Des Démences Rares Ou Précoces, IM2A, Département de Neurologie, AP-HP - Hôpital Pitié-Salpêtrière, Paris, France.,Département de Neurologie, AP-HP - Hôpital Pitié-Salpêtrière, Paris, France
| | - Johannes Levin
- Neurologische Klinik Und Poliklinik, Ludwig-Maximilians-Universität, Munich, Germany.,Center for Neurodegenerative Diseases (DZNE), Munich, Germany.,Munich Cluster of Systems Neurology, Munich, Germany
| | - Adrian Danek
- Neurologische Klinik Und Poliklinik, Ludwig-Maximilians-Universität, Munich, Germany
| | - Markus Otto
- Department of Neurology, University of Ulm, Ulm, Germany
| | - Florence Pasquier
- Univ Lille, Lille, France.,Inserm 1172, Lille, France.,CHU, CNR-MAJ, Labex Distalz, LiCEND Lille, Lille, France
| | - Isabel Santana
- Neurology Service, Faculty of Medicine, University Hospital of Coimbra (HUC), University of Coimbra, Coimbra, Portugal.,Center for Neuroscience and Cell Biology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Jonathan D Rohrer
- Department of Neurodegenerative Disease, Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK.
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Nelson A, Russell LL, Peakman G, Convery RS, Bouzigues A, Greaves CV, Bocchetta M, Cash DM, van Swieten JC, Jiskoot L, Moreno F, Sanchez-Valle R, Laforce R, Graff C, Masellis M, Tartaglia MC, Rowe JB, Borroni B, Finger E, Synofzik M, Galimberti D, Vandenberghe R, de Mendonça A, Butler CR, Gerhard A, Ducharme S, Le Ber I, Santana I, Pasquier F, Levin J, Otto M, Sorbi S, Rohrer JD, Almeida MR, Anderl‐Straub S, Andersson C, Antonell A, Archetti S, Arighi A, Balasa M, Barandiaran M, Bargalló N, Bartha R, Bender B, Benussi A, Bertoux M, Bertrand A, Bessi V, Black S, Bocchetta M, Borrego‐Ecija S, Bras J, Brice A, Bruffaerts R, Camuzat A, Cañada M, Cantoni V, Caroppo P, Cash D, Castelo‐Branco M, Colliot O, Cope T, Deramecourt V, Arriba M, Di Fede G, Díez A, Duro D, Fenoglio C, Ferrari C, Ferreira CB, Fox N, Freedman M, Fumagalli G, Funkiewiez A, Gabilondo A, Gasparotti R, Gauthier S, Gazzina S, Giaccone G, Gorostidi A, Greaves C, Guerreiro R, Heller C, Hoegen T, Indakoetxea B, Jelic V, Karnath H, Keren R, Kuchcinski G, Langheinrich T, Lebouvier T, Leitão MJ, Lladó A, Lombardi G, Loosli S, Maruta C, Mead S, Meeter L, Miltenberger G, Minkelen R, Mitchell S, Moore K, Nacmias B, Nelson A, Öijerstedt L, Olives J, Ourselin S, Padovani A, Panman J, Papma JM, Pijnenburg Y, Polito C, Premi E, Prioni S, Prix C, Rademakers R, Redaelli V, Rinaldi D, Rittman T, Rogaeva E, Rollin A, Rosa‐Neto P, Rossi G, Rossor M, Santiago B, Saracino D, Sayah S, Scarpini E, Schönecker S, Seelaar H, Semler E, Shafei R, Shoesmith C, Swift I, Tábuas‐Pereira M, Tainta M, Taipa R, Tang‐Wai D, Thomas DL, Thompson P, Thonberg H, Timberlake C, Tiraboschi P, Todd E, Van Damme P, Vandenbulcke M, Veldsman M, Verdelho A, Villanua J, Warren J, Wilke C, Wlasich E, Zetterberg H, Zulaica M. The CBI-R detects early behavioural impairment in genetic frontotemporal dementia. Ann Clin Transl Neurol 2022; 9:644-658. [PMID: 35950369 PMCID: PMC9082390 DOI: 10.1002/acn3.51544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/23/2022] [Accepted: 02/25/2022] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Behavioural dysfunction is a key feature of genetic frontotemporal dementia (FTD) but validated clinical scales measuring behaviour are lacking at present. METHODS We assessed behaviour using the revised version of the Cambridge Behavioural Inventory (CBI-R) in 733 participants from the Genetic FTD Initiative study: 466 mutation carriers (195 C9orf72, 76 MAPT, 195 GRN) and 267 non-mutation carriers (controls). All mutation carriers were stratified according to their global CDR plus NACC FTLD score into three groups: asymptomatic (CDR = 0), prodromal (CDR = 0.5) and symptomatic (CDR = 1+). Mixed-effects models adjusted for age, education, sex and family clustering were used to compare between the groups. Neuroanatomical correlates of the individual domains were assessed within each genetic group. RESULTS CBI-R total scores were significantly higher in all CDR 1+ mutation carrier groups compared with controls [C9orf72 mean 70.5 (standard deviation 27.8), GRN 56.2 (33.5), MAPT 62.1 (36.9)] as well as their respective CDR 0.5 groups [C9orf72 13.5 (14.4), GRN 13.3 (13.5), MAPT 9.4 (10.4)] and CDR 0 groups [C9orf72 6.0 (7.9), GRN 3.6 (6.0), MAPT 8.5 (13.3)]. The C9orf72 and GRN 0.5 groups scored significantly higher than the controls. The greatest impairment was seen in the Motivation domain for the C9orf72 and GRN symptomatic groups, whilst in the symptomatic MAPTgroup, the highest-scoring domains were Stereotypic and Motor Behaviours and Memory and Orientation. Neural correlates of each CBI-R domain largely overlapped across the different mutation carrier groups. CONCLUSIONS The CBI-R detects early behavioural change in genetic FTD, suggesting that it could be a useful measure within future clinical trials.
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Affiliation(s)
- Annabel Nelson
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK.,Department of Medical Statistics, London School of Hygiene and Tropical Medicine, London, UK
| | - Lucy L Russell
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - Georgia Peakman
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - Rhian S Convery
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - Arabella Bouzigues
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - Caroline V Greaves
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - Martina Bocchetta
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | - David M Cash
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
| | | | - Lize Jiskoot
- Department of Neurology, Erasmus Medical Centre, Rotterdam, Netherlands
| | - Fermin Moreno
- Cognitive Disorders Unit, Department of Neurology, Donostia Universitary Hospital, San Sebastian, Spain.,Neuroscience Area, Biodonostia Health Research Institute, San Sebastian, Gipuzkoa, Spain
| | - Raquel Sanchez-Valle
- Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Service, Hospital Clínic, Institut d'Investigacións Biomèdiques August Pi I Sunyer, University of Barcelona, Barcelona, Spain
| | - Robert Laforce
- Clinique Interdisciplinaire de Mémoire, Département des Sciences Neurologiques, CHU de Québec, and Faculté de Médecine, Université Laval, Québec, Canada
| | - Caroline Graff
- Center for Alzheimer Research, Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Bioclinicum, Karolinska Institutet, Solna, Sweden.,Unit for Hereditary Dementias, Theme Aging, Karolinska University Hospital, Solna, Sweden
| | - Mario Masellis
- Sunnybrook Health Sciences Centre, Sunnybrook Research Institute, University of Toronto, Toronto, Canada
| | - Maria Carmela Tartaglia
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, Ontario, Canada
| | - James B Rowe
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Barbara Borroni
- Neurology Unit, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
| | - Elizabeth Finger
- Department of Clinical Neurological Sciences, University of Western Ontario, London, Ontario, Canada
| | - Matthis Synofzik
- Department of Neurodegenerative Diseases, Hertie-Institute for Clinical Brain Research and Center of Neurology, University of Tübingen, Tübingen, Germany.,Center for Neurodegenerative Diseases (DZNE, Tübingen, Germany
| | - Daniela Galimberti
- Fondazione Ca' Granda, IRCCS Ospedale Policlinico, Milan, Italy.,University of Milan, Centro Dino Ferrari, Milan, Italy
| | - Rik Vandenberghe
- Laboratory for Cognitive Neurology, Department of Neurosciences, KU Leuven, Leuven, Belgium.,Neurology Service, University Hospitals Leuven, Leuven, Belgium.,Leuven Brain Institute, KU Leuven, Leuven, Belgium
| | | | - Chris R Butler
- Nuffield Department of Clinical Neurosciences, Medical Sciences Division, University of Oxford, Oxford, UK.,Department of Brain Sciences, Imperial College London, London, UK
| | - Alexander Gerhard
- Division of Neuroscience and Experimental Psychology, Wolfson Molecular Imaging Centre, University of Manchester, Manchester, UK.,Departments of Geriatric Medicine and Nuclear Medicine, University of Duisburg-Essen, Duisburg, Germany
| | - Simon Ducharme
- Department of Psychiatry, McGill University Health Centre, McGill University, Montreal, QC, Canada.,McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, QC, Canada
| | - Isabelle Le Ber
- Sorbonne Université, Paris Brain Institute - Institut du Cerveau - ICM, Inserm U1127, CNRS UMR 7225, AP-HP - Hôpital Pitié-Salpêtrière, Paris, France.,Département de Neurologie, Centre de référence des démences rares ou précoces, IM2A, AP-HP - Hôpital Pitié-Salpêtrière, Paris, France.,Département de Neurologie, AP-HP - Hôpital Pitié-Salpêtrière, Paris, France.,Reference Network for Rare Neurological Diseases (ERN-RND), European Union
| | - Isabel Santana
- University Hospital of Coimbra (HUC), Neurology Service, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Center for Neuroscience and Cell Biology, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Florence Pasquier
- Univ Lille, Lille, France.,Inserm 1172, Lille, France.,CHU, CNR-MAJ, Labex Distalz, LiCEND Lille, Lille, France
| | - Johannes Levin
- Department of Neurology, Ludwig-Maximilians Universität München, Munich, Germany.,German Center for Neurodegenerative Diseases (DZNE), Munich, Germany.,Munich Cluster of Systems Neurology (SyNergy), Munich, Germany
| | - Markus Otto
- Department of Neurology, University of Ulm, Ulm, Germany
| | - Sandro Sorbi
- Department of Neurofarba, University of Florence, Florence, Italy.,IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy
| | - Jonathan D Rohrer
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, London, UK
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Le Blanc G, Jetté Pomerleau V, McCarthy J, Borroni B, Swieten J, Galimberti D, Sanchez‐Valle R, LaForce R, Moreno F, Synofzik M, Graff C, Masellis M, Tartaglia MC, Rowe JB, Vandenberghe R, Finger E, Tagliavini F, Mendonça A, Santana I, Butler C, Gerhard A, Danek A, Levin J, Otto M, Frisoni G, Sorbi S, Rohrer JD, Ducharme S, Almeida MR, Anderl‐Straub S, Andersson C, Antonell A, Arighi A, Balasa M, Barandiaran M, Bargalló N, Bartha R, Bender B, Benussi L, Binetti G, Black S, Bocchetta M, Borrego S, Bras J, Bruffaerts R, Caroppo P, Cash D, Castelo‐Branco M, Convery R, Cope T, Arriba M, Di Fede G, Díaz Z, Dick KM, Duro D, Fenoglio C, Ferreira C, Ferreira CB, Flanagan T, Fox N, Freedman M, Fumagalli G, Gabilondo A, Gauthier S, Ghidoni R, Giaccone G, Gorostidi A, Greaves C, Guerreiro R, Heller C, Hoegen T, Indakoetxea B, Jelic V, Jiskoot L, Karnath H, Keren R, Leitão MJ, Lladó A, Lombardi G, Loosli S, Maruta C, Mead S, Meeter L, Miltenberger G, Minkelen R, Mitchell S, Nacmias B, Neason M, Nicholas J, Öijerstedt L, Olives J, Panman J, Papma J, Patzig M, Pievani M, Pijnenburg Y, Prioni S, Prix C, Rademakers R, Redaelli V, Rittman T, Rogaeva E, Rosa‐Neto P, Rossi G, Rossor M, Santiago B, Scarpini E, Semler E, Shafei R, Shoesmith C, Tábuas‐Pereira M, Tainta M, Tang‐Wai D, Thomas DL, Thonberg H, Timberlake C, Tiraboschi P, Vandamme P, Vandenbulcke M, Veldsman M, Verdelho A, Villanua J, Warren J, Wilke C, Zetterberg H, Zulaica M. Faster Cortical Thinning and Surface Area Loss in Presymptomatic and Symptomatic
C9orf72
Repeat Expansion Adult Carriers. Ann Neurol 2020; 88:113-122. [DOI: 10.1002/ana.25748] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 04/08/2020] [Accepted: 04/10/2020] [Indexed: 12/13/2022]
Affiliation(s)
| | - Vincent Jetté Pomerleau
- Department of Psychiatry McGill University Health Centre, McGill University Montreal Quebec Canada
| | - Jillian McCarthy
- McConnell Brain Imaging Centre Montreal Neurological Institute Montreal Quebec Canada
| | - Barbara Borroni
- Center for Neurodegenerative Disorders, Neurology Unit, Department of Clinical and Experimental Sciences University of Brescia Brescia Italy
| | - John Swieten
- Department of Neurology, Erasmus Medical Center Rotterdam the Netherlands
| | - Daniela Galimberti
- Department of Pathophysiology and Transplantation, Dino Ferrari Center University of Milan, Fondazione Cà Granda, IRCCS Ospedale Maggiore Policlinico Milan Italy
| | - Raquel Sanchez‐Valle
- Alzheimer's Disease and Other Cognitive Disorders Unit, Neurology Department Hospital Clinic, Institut d'Investigacions Biomèdiques August Pi I Sunyer, University of Barcelona Barcelona Spain
| | - Robert LaForce
- Clinique Interdisciplinaire de Mémoire, Département des Sciences Neurologiques, CHU de Québec, and Faculté de Médecine Laval University Quebec City Quebec Canada
| | - Fermin Moreno
- Department of Neurology Hospital Universitario Donostia San Sebastian Spain
| | - Matthis Synofzik
- Department of Cognitive Neurology, Center for Neurology and Hertie Institute for Clinical Brain Research Tübingen Germany
| | - Caroline Graff
- Department NVS, Center for Alzheimer Research, Division of Neurogenetics Karolinska Institute Stockholm Sweden
| | - Mario Masellis
- LC Campbell Cognitive Neurology Research Unit, Sunnybrook Research Institute Toronto Ontario Canada
| | - Maria C. Tartaglia
- Toronto Western Hospital, Tanz Centre for Research in Neurodegenerative Disease Toronto Ontario Canada
| | - James B. Rowe
- Department of Clinical Neurosciences University of Cambridge Cambridge United Kingdom
| | - Rik Vandenberghe
- Laboratory for Cognitive Neurology, Department of Neurosciences KU Leuven Leuven Belgium
| | - Elizabeth Finger
- Department of Clinical Neurological Sciences University of Western Ontario London Ontario Canada
| | - Fabrizio Tagliavini
- Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Istituto Neurologico Carlo Besta Milan Italy
| | | | - Isabel Santana
- Neurology Department Centro Hospitalar e Universitário de Coimbra Coimbra Portugal
| | - Chris Butler
- Department of Clinical Neurology University of Oxford Oxford United Kingdom
| | - Alex Gerhard
- Institute of Brain, Behaviour, and Mental Health, University of Manchester, Withington Manchester United Kingdom
| | - Adrian Danek
- Neurologische Klinik und Poliklinik, Ludwig Maximilian University Munich Germany
- German Center for Neurodegenerative Diseases Munich Germany
| | - Johannes Levin
- Department of Neurology University Hospital Ulm Ulm Germany
| | - Markus Otto
- Istituto di Ricovero e Cura a Carattere Scientifico Istituto Centro San Giovanni di Dio Fatebenefratelli Brescia Italy
| | - Giovanni Frisoni
- Istituto di Ricovero e Cura a Carattere Scientifico Istituto Centro San Giovanni di Dio Fatebenefratelli Brescia Italy
- Memory Clinic and LANVIE‐Laboratory of Neuroimaging of Aging, University Hospitals and University of Geneva Geneva Switzerland
| | - Sandro Sorbi
- Department of Neuroscience, Psychology, Drug Research, and Child Health University of Florence Florence Italy
- Istituto di Ricovero e Cura a Carattere Scientifico Fondazione Don Carlo Gnocchi Florence Italy
| | - Jonathan D. Rohrer
- Dementia Research Centre University College London Institute of Neurology London United Kingdom
| | - Simon Ducharme
- Department of Psychiatry McGill University Health Centre, McGill University Montreal Quebec Canada
- McConnell Brain Imaging Centre Montreal Neurological Institute Montreal Quebec Canada
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Feil K, Boettcher N, Lezius F, Habs M, Hoegen T, Huettemann K, Muth C, Eren O, Schoeberl F, Zwergal A, Bayer O, Strupp M. Clinical evaluation of the bed cycling test. Brain Behav 2016; 6:e00445. [PMID: 27096103 PMCID: PMC4829574 DOI: 10.1002/brb3.445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 01/07/2016] [Accepted: 01/08/2016] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVE Additionally to the forearm rolling test to detect mild unilateral upper limb dysfunction, the bed cycling test (BCT) for detection of mild to moderate lower limb dysfunction was developed, evaluated and compared to the leg holding test. METHODS In a prospective observer-blinded study, 60 patients with MRI/CT-proven focal cerebral hemisphere lesions and a mild to moderate unilateral paresis of the lower limb (graduated MRC 3-4/5), and 60 control persons with normal imaging were examined and filmed. Nine observers blinded to the diagnosis evaluated these videos. The sensitivity, specificity and the positive and negative predictive values of the clinical tests were analyzed. RESULTS The observers gave a correct evaluation of BCT in 35.5% of all patients with focal cerebral lesions compared to 26.0% for the leg holding test. On the other hand, observers had false negative results in 29.1% of cases with BCT and 44.7% with leg holding test. In 36.7% of patients, only BCT was pathological while leg holding test was unremarkable. The sensitivity of the combination of both tests was 0.68 (95% CI 0.61-0.75). The BCT is more sensitive (64.3%) than leg holding test (46.2%) while the specificity of leg holding test (85.6%) is higher than of BCT (70.1%) to detect a cerebral lesion affecting the lower limb. The inter-rater variability is high with no differences comparing different types of clinical experience. CONCLUSIONS The BCT is a useful additional clinical bedside test to detect subtle unilateral cerebral lesions. The BCT is easy to perform and can be added to the routine neurological examination.
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Affiliation(s)
- Katharina Feil
- Department of Neurology University Hospital Munich Germany; German Center for Vertigo and Balance Disorders University Hospital Munich Germany
| | - Nicolina Boettcher
- German Center for Vertigo and Balance Disorders University Hospital Munich Germany
| | - Franziska Lezius
- Department of Anesthesiology and Operative Intensive Care Medicine Charité University Berlin Germany
| | - Maximilian Habs
- Department of Neurology University Hospital Munich Germany; German Center for Vertigo and Balance Disorders University Hospital Munich Germany
| | - Tobias Hoegen
- Department of Neurology University Hospital Munich Germany
| | | | - Carolin Muth
- German Center for Vertigo and Balance Disorders University Hospital Munich Germany
| | - Ozan Eren
- German Center for Vertigo and Balance Disorders University Hospital Munich Germany
| | - Florian Schoeberl
- Department of Neurology University Hospital Munich Germany; German Center for Vertigo and Balance Disorders University Hospital Munich Germany
| | - Andreas Zwergal
- Department of Neurology University Hospital Munich Germany; German Center for Vertigo and Balance Disorders University Hospital Munich Germany
| | - Otmar Bayer
- German Center for Vertigo and Balance Disorders University Hospital Munich Germany
| | - Michael Strupp
- Department of Neurology University Hospital Munich Germany; German Center for Vertigo and Balance Disorders University Hospital Munich Germany
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Hoegen T, Tremel N, Klein M, Angele B, Wagner H, Kirschning C, Pfister HW, Fontana A, Hammerschmidt S, Koedel U. The NLRP3 inflammasome contributes to brain injury in pneumococcal meningitis and is activated through ATP-dependent lysosomal cathepsin B release. J Immunol 2011; 187:5440-51. [PMID: 22003197 DOI: 10.4049/jimmunol.1100790] [Citation(s) in RCA: 164] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Streptococcus pneumoniae meningitis causes brain damage through inflammation-related pathways whose identity and mechanisms of action are yet unclear. We previously identified caspase-1, which activates precursor IL-1 type cytokines, as a central mediator of inflammation in pneumococcal meningitis. In this study, we demonstrate that lack of the inflammasome components ASC or NLRP3 that are centrally involved in caspase-1 activation decreases scores of clinical and histological disease severity as well as brain inflammation in murine pneumococcal meningitis. Using specific inhibitors (anakinra and rIL-18-binding protein), we further show that ASC- and NLRP3-dependent pathologic alterations are solely related to secretion of both IL-1β and IL-18. Moreover, using differentiated human THP-1 cells, we demonstrate that the pneumococcal pore-forming toxin pneumolysin is a key inducer of IL-1β expression and inflammasome activation upon pneumococcal challenge. The latter depends on the release of ATP, lysosomal destabilization (but not disruption), and cathepsin B activation. The in vivo importance of this pathway is supported by our observation that the lack of pneumolysin and cathepsin B inhibition is associated with a better clinical course and less brain inflammation in murine pneumococcal meningitis. Collectively, our study indicates a central role of the NLRP3 inflammasome in the pathology of pneumococcal meningitis. Thus, interference with inflammasome activation might be a promising target for adjunctive therapy of this disease.
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Affiliation(s)
- Tobias Hoegen
- Department of Neurology, Clinic of the University of Munich, D-81377 Munich, Germany
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Demel C, Hoegen T, Giese A, Angele B, Pfister HW, Koedel U, Klein M. Reduced spiral ganglion neuronal loss by adjunctive neurotrophin-3 in experimental pneumococcal meningitis. J Neuroinflammation 2011; 8:7. [PMID: 21261959 PMCID: PMC3038911 DOI: 10.1186/1742-2094-8-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Accepted: 01/24/2011] [Indexed: 12/20/2022] Open
Abstract
Background Hearing loss is a frequent long-term complication of pneumococcal meningitis (PM). Its main pathological correlate is damage to the organ of Corti and loss of spiral ganglion neurons. The only current treatment option is cochlear implants which require surviving neurons. Here, we investigated the impact of systemically applied neurotrophin-3 (NT-3) on long-term hearing loss and the survival of neurons. Methods Eighteen hours after infection with S. pneumoniae, C57BL/6 mice were treated with a combination of ceftriaxone with NT-3 or dexamethasone or placebo. Hearing, cochlear damage, and brain damage were assessed by audiometry and histology. Results The main findings from immunohistochemical visualization of neurotrophins (NT-3, BDNF) and their receptors (TrkB, TrkC, and p75) in the cochlea were (i) enhanced staining for the cell survival-promoting receptor TrkB and (ii) increased NT-3 staining in NT-3 treated mice, showing that systemically applied NT-3 reaches the cochlea. The major effects of adjunctive NT-3 treatment were (i) a reduction of meningitis-induced hearing impairment and (ii) a reduction of spiral ganglion neuronal loss. The efficacy of NT-3 therapy was comparable to that of dexamethasone. Conclusion Systemically applied NT-3 might be an interesting candidate to improve hearing outcome after pneumococcal meningitis.
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Affiliation(s)
- Cornelia Demel
- Department of Neurology, Klinikum Grosshadern, Ludwig Maximilians University Munich, Marchioninistrasse 15, 81377 Munich, Germany
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