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Adam A, Robison J, Lu J, Jose R, Badran N, Vivas-Buitrago T, Rigamonti D, Sattar A, Omoush O, Hammad M, Dawood M, Maghaslah M, Belcher T, Carson K, Hoffberger J, Jusué Torres I, Foley S, Yasar S, Thai QA, Wemmer J, Klinge P, Al-Mutawa L, Al-Ghamdi H, Carson KA, Asgari M, de Zélicourt D, Kurtcuoglu V, Garnotel S, Salmon S, Balédent O, Lokossou A, Page G, Balardy L, Czosnyka Z, Payoux P, Schmidt EA, Zitoun M, Sevestre MA, Alperin N, Baudracco I, Craven C, Matloob S, Thompson S, Haylock Vize P, Thorne L, Watkins LD, Toma AK, Bechter K, Pong AC, Jugé L, Bilston LE, Cheng S, Bradley W, Hakim F, Ramón JF, Cárdenas MF, Davidson JS, García C, González D, Bermúdez S, Useche N, Mejía JA, Mayorga P, Cruz F, Martinez C, Matiz MC, Vallejo M, Ghotme K, Soto HA, Riveros D, Buitrago A, Mora M, Murcia L, Bermudez S, Cohen D, Dasgupta D, Curtis C, Domínguez L, Remolina AJ, Grijalba MA, Whitehouse KJ, Edwards RJ, Eleftheriou A, Lundin F, Fountas KN, Kapsalaki EZ, Smisson HF, Robinson JS, Fritsch MJ, Arouk W, Garzon M, Kang M, Sandhu K, Baghawatti D, Aquilina K, James G, Thompson D, Gehlen M, Schmid Daners M, Eklund A, Malm J, Gomez D, Guerra M, Jara M, Flores M, Vío K, Moreno I, Rodríguez S, Ortega E, Rodríguez EM, McAllister JP, Guerra MM, Morales DM, Sival D, Jimenez A, Limbrick DD, Ishikawa M, Yamada S, Yamamoto K, Junkkari A, Häyrinen A, Rauramaa T, Sintonen H, Nerg O, Koivisto AM, Roine RP, Viinamäki H, Soininen H, Luikku A, Jääskeläinen JE, Leinonen V, Kehler U, Lilja-Lund O, Kockum K, Larsson EM, Riklund K, Söderström L, Hellström P, Laurell K, Kojoukhova M, Sutela A, Vanninen R, Vanha KI, Timonen M, Rummukainen J, Korhonen V, Helisalmi S, Solje E, Remes AM, Huovinen J, Paananen J, Hiltunen M, Kurki M, Martin B, Loth F, Luciano M, Luikku AJ, Hall A, Herukka SK, Mattila J, Lötjönen J, Alafuzoff I, Jurjević I, Miyajima M, Nakajima M, Murai H, Shin T, Kawaguchi D, Akiba C, Ogino I, Karagiozov K, Arai H, Reis RC, Teixeira MJ, Valêncio CG, da Vigua D, Almeida-Lopes L, Mancini MW, Pinto FCG, Maykot RH, Calia G, Tornai J, Silvestre SSS, Mendes G, Sousa V, Bezerra B, Dutra P, Modesto P, Oliveira MF, Petitto CE, Pulhorn H, Chandran A, McMahon C, Rao AS, Jumaly M, Solomon D, Moghekar A, Relkin N, Hamilton M, Katzen H, Williams M, Bach T, Zuspan S, Holubkov R, Rigamonti A, Clemens G, Sharkey P, Sanyal A, Sankey E, Rigamonti K, Naqvi S, Hung A, Schmidt E, Ory-Magne F, Gantet P, Guenego A, Januel AC, Tall P, Fabre N, Mahieu L, Cognard C, Gray L, Buttner-Ennever JA, Takagi K, Onouchi K, Thompson SD, Thorne LD, Tully HM, Wenger TL, Kukull WA, Doherty D, Dobyns WB, Moran D, Vakili S, Patel MA, Elder B, Goodwin CR, Crawford JA, Pletnikov MV, Xu J, Blitz A, Herzka DA, Guerrero-Cazares H, Quiñones-Hinojosa A, Mori S, Saavedra P, Treviño H, Maitani K, Ziai WC, Eslami V, Nekoovaght-Tak S, Dlugash R, Yenokyan G, McBee N, Hanley DF. Abstracts from Hydrocephalus 2016. Fluids Barriers CNS 2017;14:15. [PMID: 28929972 PMCID: PMC5471936 DOI: 10.1186/s12987-017-0054-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open

Affiliation(s)

A Adam Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA.,Johns Hopkins Biostatistics Center, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.,Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
J Robison Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
J Lu Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
R Jose Johns Hopkins Aramco Healthcare, Dhahran, Saudi Arabia
N Badran Johns Hopkins Aramco Healthcare, Dhahran, Saudi Arabia
T Vivas-Buitrago Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
D Rigamonti Johns Hopkins University, Baltimore, MD, USA.,Johns Hopkins Aramco Healthcare, Dhahran, Saudi Arabia.,Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA.,Johns Hopkins Hopkins Aramco Healthcare, Dhahran, Saudi Arabia
A Sattar Johns Hopkins Aramco Healthcare, Ras Tanura, Saudi Arabia.,Primary Care, Johns Hopkins Aramco Healthcare, Ras Tanura, Saudi Arabia
O Omoush Johns Hopkins Aramco Healthcare, Ras Tanura, Saudi Arabia.,Primary Care, Johns Hopkins Aramco Healthcare, Ras Tanura, Saudi Arabia
M Hammad Johns Hopkins Aramco Healthcare, Ras Tanura, Saudi Arabia
M Dawood Johns Hopkins Aramco Healthcare, Ras Tanura, Saudi Arabia
M Maghaslah Johns Hopkins Aramco Healthcare, Ras Tanura, Saudi Arabia
T Belcher Johns Hopkins Aramco Healthcare, Ras Tanura, Saudi Arabia
K Carson Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA.,Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
J Hoffberger Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA
I Jusué Torres Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
S Foley Department of Neurosurgery, Rhode Island Hospital, Providence, RI, USA
S Yasar Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA
Q A Thai Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA
J Wemmer Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA
P Klinge Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA
L Al-Mutawa Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA
H Al-Ghamdi Department of Neurosurgery, Rhode Island Hospital, Providence, RI, USA
K A Carson Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
M Asgari The Interface Group, Institute of PhysiologyUniversity of Zurich, Zurich, Switzerland
D de Zélicourt The Interface Group, Institute of PhysiologyUniversity of Zurich, Zurich, Switzerland
V Kurtcuoglu The Interface Group, Institute of PhysiologyUniversity of Zurich, Zurich, Switzerland.,Institute of Physiology, University of Zurich, Zurich, Switzerland.,Neuroscience Center Zurich and the Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
S Garnotel BioFlowImage Laboratory, University of Picardie Jules Verne, Amiens, France.,Reims Mathematics Laboratory, University of Reims Champagne-Ardenne, Reims, France.,Image Processing Laboratory, University Hospital of Amiens-Picardie, Amiens, France.,BioFlowImage Laboratory, Department of Medical Image Processing, University Hospital of Picardie Jules Verne, Amiens, France
S Salmon Reims Mathematics Laboratory, University of Reims Champagne-Ardenne, Reims, France
O Balédent BioFlowImage Laboratory, University of Picardie Jules Verne, Amiens, France.,Image Processing Laboratory, University Hospital of Amiens-Picardie, Amiens, France.,BioFlowImage Laboratory, Department of Medical Image Processing, University Hospital of Picardie Jules Verne, Amiens, France
A Lokossou BioFlowImage Laboratory, Department of Medical Image Processing, University Hospital of Picardie Jules Verne, Amiens, France
G Page BioFlowImage Laboratory, Department of Medical Image Processing, University Hospital of Picardie Jules Verne, Amiens, France
L Balardy Department of Geriatric, University Hospital of Toulouse, Toulouse, France.,Departments of Geriatric, University Hospital of Toulouse, Toulouse, France.,Department of Geriatry, University Hospital Toulouse, Toulouse, France
Z Czosnyka Neurosciences department, University of Cambridge, Cambridge, UK.,Brain Physics Lab, Academic Neurosurgery, University of Cambridge, Cambridge, UK
P Payoux Department of Nuclear Medicine, University Hospital of Toulouse, Toulouse, France.,Department of Nuclear Medicine, University Hospital Toulouse, Toulouse, France.,INSER TONIC 1014, Toulouse Neuroimaging Center, Toulouse, France
E A Schmidt UMR 1214-INSERM/UPS-TONIC Toulouse Neuro-Imaging Center, Toulouse, France.,Department of Neurosurgery, University Hospital of Toulouse, Toulouse, France.,Department of Neurosurgery, University Hospital Toulouse, Toulouse, France
M Zitoun BioFlowImage, University Hospital of Picardie Jules Verne, Amiens, France
M A Sevestre BioFlowImage, University Hospital of Picardie Jules Verne, Amiens, France
N Alperin University of Miami Health System, Miami, FL, USA
I Baudracco Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK
C Craven Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK
S Matloob Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK
S Thompson Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK
P Haylock Vize Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK
L Thorne Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK
L D Watkins Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK.,The National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
A K Toma Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK.,The National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
Karl Bechter Department Psychiatry II/Bezirkskliniken, Ulm University, Günzburg, Germany
A C Pong Neuroscience Research Australia, Randwick, Australia.,School of Medical Sciences, University of New South Wales, Kensington, Australia
L Jugé Neuroscience Research Australia, Randwick, Australia.,School of Medical Sciences, University of New South Wales, Kensington, Australia
L E Bilston Neuroscience Research Australia, Randwick, Australia.,Prince of Wales Clinical School, University of New South Wales, Kensington, Australia
S Cheng Neuroscience Research Australia, Randwick, Australia.,Department of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, Australia
W Bradley Department of Radiology, University of California San Diego Health System, San Diego, CA, USA
F Hakim Department of Surgery, Section of Neurosurgery, Fundación Santa Fe de Bogotá, Bogotá, Colombia.,Neurosurgery Department, Hospital Universitario, Fundación Santafe de Bogota, Bogota, Colombia
J F Ramón Department of Surgery, Section of Neurosurgery, Fundación Santa Fe de Bogotá, Bogotá, Colombia.,Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia.,Neurosurgery Department, Hospital Universitario, Fundación Santafe de Bogota, Bogota, Colombia
M F Cárdenas Department of Surgery, Section of Neurosurgery, Fundación Santa Fe de Bogotá, Bogotá, Colombia
J S Davidson Department of Surgery, Section of Neurosurgery, Fundación Santa Fe de Bogotá, Bogotá, Colombia
C García Department of Surgery, Section of Neurosurgery, Fundación Santa Fe de Bogotá, Bogotá, Colombia
D González Department of Surgery, Section of Neurosurgery, Fundación Santa Fe de Bogotá, Bogotá, Colombia
S Bermúdez Department of Diagnostic Imaging, Section of Neuroradiology, Fundación Santa Fe de Bogotá, Bogotá, Colombia
N Useche Department of Diagnostic Imaging, Section of Neuroradiology, Fundación Santa Fe de Bogotá, Bogotá, Colombia
J A Mejía Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
P Mayorga Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
F Cruz Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
C Martinez Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
M C Matiz Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
M Vallejo Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
K Ghotme Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
H A Soto Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
D Riveros Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
A Buitrago Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
M Mora Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
L Murcia Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
S Bermudez Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
D Cohen Grupo de Hidrocefalia con Presión Normal, Hospital Universitario Fundación Santa Fe de Bogotá, Bogotá, Colombia
D Dasgupta Victor Horsley Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK
C Curtis Department of Microbiology, University College London Hospital NHS Foundation Trust, London, UK
L Domínguez Neurosurgery Department, Cartagena University, Cartagena de Indias, Colombia
A J Remolina Neurosurgery Department, Cartagena University, Cartagena de Indias, Colombia
M A Grijalba Neurosurgery Department, Cartagena University, Cartagena de Indias, Colombia
K J Whitehouse Department of Paediatric Neurosurgery, Bristol Royal Hospital for Children, Bristol, UK
R J Edwards Department of Paediatric Neurosurgery, Bristol Royal Hospital for Children, Bristol, UK
A Eleftheriou Department of Neurology, University Hospital, Linköping, Sweden
F Lundin Division of Neuroscience, Department of Clinical and Experimental Medicine (IKE), Linköping University, Linköping, Sweden
K N Fountas Department of Neurosurgery, School of Medicine, University of Thessaly, Larisa, Greece
E Z Kapsalaki Department of Diagnostic Radiology, School of Medicine, University of Thessaly, Larisa, Greece
H F Smisson Department of Neurosurgery, Georgia Neurosurgical Institute, Macon, GA, USA
J S Robinson Department of Neurosurgery, Georgia Neurosurgical Institute, Macon, GA, USA
M J Fritsch Klinik für Neurochirurgie, Dietrich-Bonhoeffer-Klinikum, Neubrandenburg, Germany
W Arouk Klinik für Neurochirurgie, Dietrich-Bonhoeffer-Klinikum, Neubrandenburg, Germany
M Garzon Great Ormond Street Hospital, London, UK
M Kang Great Ormond Street Hospital, London, UK
K Sandhu Great Ormond Street Hospital, London, UK
D Baghawatti Great Ormond Street Hospital, London, UK
K Aquilina Great Ormond Street Hospital, London, UK
G James Great Ormond Street Hospital, London, UK
D Thompson Great Ormond Street Hospital, London, UK
M Gehlen Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland.,Institute of Physiology, University of Zurich, Zurich, Switzerland
M Schmid Daners Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
A Eklund Department of Radiation Sciences, Umeå University, Umeå, Sweden
J Malm Department of Pharmacology and Clinical Neuroscience, Umeå University, Umeå, Sweden
D Gomez Neurosurgery Department, Hospital Universitario, Fundación Santafe de Bogota, Bogota, Colombia
M Guerra Instituto de Anatomía, Histología y Patología, Facultad de Medicina, UACh, Valdivia, Chile
M Jara Instituto de Anatomía, Histología y Patología, Facultad de Medicina, UACh, Valdivia, Chile
M Flores Laboratorio de Polímeros, Facultad de Ciencias, UACh, Valdivia, Chile
K Vío Instituto de Anatomía, Histología y Patología, Facultad de Medicina, UACh, Valdivia, Chile
I Moreno Laboratorio de Polímeros, Facultad de Ciencias, UACh, Valdivia, Chile
S Rodríguez Instituto de Anatomía, Histología y Patología, Facultad de Medicina, UACh, Valdivia, Chile
E Ortega Instituto de Neurociencias Clínicas, Facultad de Medicina, UACh, Valdivia, Chile
E M Rodríguez Instituto de Anatomía, Histología y Patología, Facultad de Medicina, UACh, Valdivia, Chile.,Instituto de Histologia y Patologia, Facultad de Medicina, Universidad Austral de Chile, Valdivia, Chile
J P McAllister Department of Neurosurgery, St. Louis Children's Hospital, St. Louis, MO, USA
M M Guerra Instituto de Histologia y Patologia, Facultad de Medicina, Universidad Austral de Chile, Valdivia, Chile
D M Morales Department of Neurosurgery, St. Louis Children's Hospital, St. Louis, MO, USA
D Sival Department of Pediatrics Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
A Jimenez Departamento de Biología Celular, Genética y Fisiología Facultad de Ciencias, Universidad de Malaga, Malaga, Spain
D D Limbrick Department of Neurosurgery, St. Louis Children's Hospital, St. Louis, MO, USA.,Department of Pediatrics, St. Louis Children's Hospital, St. Louis, MO, USA
M Ishikawa Rakuwa Villa Ilios, Kyoto, Japan.,Normal Pressure Hydrocephalus Center, Otowa Hospital, Kyoto, Japan
S Yamada Normal Pressure Hydrocephalus Center, Otowa Hospital, Kyoto, Japan.,Department of Neurosurgery, Otowa Hospital, Kyoto, Japan
K Yamamoto Department of Neurosurgery, Otowa Hospital, Kyoto, Japan
A Junkkari Neurosurgery of NeuroCenter, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland.,Neurosurgery of NeuroCenter, Kuopio University Hospital, Kuopio, Finland
A Häyrinen Neurosurgery of NeuroCenter, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
T Rauramaa Department of Pathology, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland.,Department of Pathology, Kuopio University Hospital, Kuopio, Finland.,Institute of Clinical Medicine-Pathology, University of Eastern Finland, Kuopio, Finland
H Sintonen Department of Public Health, University of Helsinki, Helsinki, Finland
O Nerg Neurology of NeuroCenter, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland.,Neurology of NeuroCenter, Kuopio University Hospital, Kuopio, Finland.,Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland
A M Koivisto Neurology of NeuroCenter, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland.,Unit of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.,Neurology of NeuroCenter, Kuopio University Hospital, Kuopio, Finland.,Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland.,Department of Neurology, Kuopio University Hospital, Kuopio, Finland
R P Roine University of Eastern Finland, Kuopio Finland and Helsinki and Uusimaa Hospital DistrictGroup Administration, Helsinki, Finland
H Viinamäki Department of Psychiatry, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
H Soininen Department of Neurology, University of Eastern Finland, Kuopio, Finland.,Unit of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.,Neurology of NeuroCenter, Kuopio University Hospital, Kuopio, Finland.,Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland.,Department of Neurology, Kuopio University Hospital, Kuopio, Finland
A Luikku Neurology of NeuroCenter, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
J E Jääskeläinen Neurosurgery of NeuroCenter, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland.,Department of Neurosurgery, Kuopio University Hospital, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.,Neurosurgery of NeuroCenter, Kuopio University Hospital, Kuopio, Finland
V Leinonen Neurosurgery of NeuroCenter, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland.,Department of Neurosurgery, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland.,Department of Neurosurgery, Kuopio University Hospital, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.,Neurosurgery of NeuroCenter, Kuopio University Hospital, Kuopio, Finland
U Kehler Neurosurgical Department, Asklepios Klinik Hamburg Altona, Hamburg, Germany
O Lilja-Lund Department of Pharmacology and Clinical Neuroscience, Unit of Neurology, Östersund, Umeå University, Umeå, Sweden
K Kockum Department of Pharmacology and Clinical Neuroscience, Unit of Neurology, Östersund, Umeå University, Umeå, Sweden
E M Larsson Department of Radiology, Uppsala University, Uppsala, Sweden
K Riklund Department of Radiation Sciences, Umeå University, Umeå, Sweden
L Söderström Department of Pharmacology and Clinical Neuroscience, Unit of Neurology, Östersund, Umeå University, Umeå, Sweden
P Hellström Hydrocephalus Research Unit, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
K Laurell Department of Pharmacology and Clinical Neuroscience, Unit of Neurology, Östersund, Umeå University, Umeå, Sweden
M Kojoukhova Neurosurgery of NeuroCenter, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland.,Neurosurgery of NeuroCenter, Kuopio University Hospital, Kuopio, Finland.,Department of Radiology, Kuopio University Hospital, Kuopio, Finland
A Sutela Department of Radiology, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland.,Department of Radiology, Kuopio University Hospital, Kuopio, Finland
R Vanninen Department of Radiology, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
K I Vanha Neurosurgery of NeuroCenter, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
M Timonen Neurosurgery of NeuroCenter, Kuopio University Hospital and University of Eastern Finland, Kuopio, Finland
J Rummukainen Department of Pathology, Kuopio University Hospital, Kuopio, Finland
V Korhonen Department of Neurosurgery, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
S Helisalmi Unit of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.,Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland.,Department of Neurology, Kuopio University Hospital, Kuopio, Finland
E Solje Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland.,Department of Neurology, Kuopio University Hospital, Kuopio, Finland
A M Remes Unit of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.,Neurology of NeuroCenter, Kuopio University Hospital, Kuopio, Finland.,Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland.,Department of Neurology, Kuopio University Hospital, Kuopio, Finland
J Huovinen Department of Neurosurgery, Kuopio University Hospital, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
J Paananen Unit of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.,Department of Neurology, Kuopio University Hospital, Kuopio, Finland.,Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
M Hiltunen Unit of Neurology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.,Neurology of NeuroCenter, Kuopio University Hospital, Kuopio, Finland.,Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland.,Department of Neurology, Kuopio University Hospital, Kuopio, Finland.,Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
M Kurki Department of Neurosurgery, Kuopio University Hospital, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland.,Analytical and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.,Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA.,Stanley Center for Psychiatric Research, Broad Institute for Harvard and MIT, Cambridge, MA, USA
B Martin Biological Engineering, University of Idaho, Moscow, ID, USA
F Loth Mechanical Engineering, University of Akron, Akron, Ohio, USA
M Luciano Neurosurgery, Johns Hopkins University, Baltimore, MA, USA.,Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, MD, USA
A J Luikku Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland.,Neurosurgery of NeuroCenter, Kuopio University Hospital, Kuopio, Finland
A Hall Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland
S K Herukka Neurology of NeuroCenter, Kuopio University Hospital, Kuopio, Finland.,Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland
J Mattila VTT Technical Research Centre of Finland, Tampere, Finland.,Combinostics Ltd, Tampere, Finland
J Lötjönen VTT Technical Research Centre of Finland, Tampere, Finland.,Combinostics Ltd, Tampere, Finland
I Alafuzoff Institute of Clinical Medicine-Neurology, University of Eastern Finland, Kuopio, Finland.,Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.,Department of Pathology and Cytology, Uppsala University Hospital, Uppsala, Sweden
I Jurjević Department of Neurosurgery, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Department of Pharmacology and Department of Neurology, University of Zagreb School of Medicine, Zagreb, Croatia
M Miyajima Department of Neurosurgery, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan
M Nakajima Department of Neurosurgery, Graduate School of Medicine, Juntendo University, Tokyo, Japan.,Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan
H Murai Department of Neurosurgery, Graduate School of Medicine, Chiba University, Chiba, Japan
T Shin Department of Neurosurgery, Graduate School of Medicine, Chiba University, Chiba, Japan
D Kawaguchi Department of Neurosurgery, Graduate School of Medicine, Chiba University, Chiba, Japan
C Akiba Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan
I Ogino Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan
K Karagiozov Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan
H Arai Department of Neurosurgery, Juntendo University School of Medicine, Tokyo, Japan
R C Reis Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
M J Teixeira Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
C G Valêncio Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
D da Vigua Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
L Almeida-Lopes Núcleo de Pesquisa e Ensino de Fototerapia nas Ciências da Saúde (NUPEN), São Carlos, Brazil
M W Mancini Núcleo de Pesquisa e Ensino de Fototerapia nas Ciências da Saúde (NUPEN), São Carlos, Brazil
F C G Pinto Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
R H Maykot Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
G Calia Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
J Tornai Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
S S S Silvestre Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
G Mendes Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
V Sousa Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
B Bezerra Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
P Dutra Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
P Modesto Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
M F Oliveira Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
C E Petitto Group of Cerebral Hydrodynamics, Division of Functional Neurosurgery, Institute of Psychiatry, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
H Pulhorn Department of Neurosurgery, The Walton Centre, Liverpool, UK
A Chandran Department of Neuroradiology, The Walton Centre, Liverpool, UK
C McMahon Department of Neurosurgery, The Walton Centre, Liverpool, UK
A S Rao The Johns Hopkins Hospital, Baltimore, MD, USA
M Jumaly The Johns Hopkins Hospital, Baltimore, MD, USA
D Solomon The Johns Hopkins Hospital, Baltimore, MD, USA.,Neurology, Johns Hopkins Hospital, Baltimore, MD, USA.,Department of Neurology, Johns Hopkins Bayview Medical Center, Baltimore, MD, USA
A Moghekar The Johns Hopkins Hospital, Baltimore, MD, USA
N Relkin Department of Neurology, Weill Cornell Medical College, New York, NY, USA
M Hamilton Department of Neurosurgery, University of Calgary, Alberta, Canada
H Katzen Department of Neurology, University of Miami, Miami, FL, USA
M Williams Department of Neurosurgery, Washington University, Seattle, WA, USA
T Bach Utah Data Collection Center (DCC), University of Utah, Salt Lake City, UT, USA
S Zuspan Utah Data Collection Center (DCC), University of Utah, Salt Lake City, UT, USA
R Holubkov Utah Data Collection Center (DCC), University of Utah, Salt Lake City, UT, USA
A Rigamonti Cornell University, Ithaca, NY, USA
G Clemens Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
P Sharkey School of Business, Loyola University Maryland, Baltimore, MD, USA
A Sanyal Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
E Sankey Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
K Rigamonti Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA
S Naqvi Primary Care, Johns Hopkins Aramco Healthcare, Abqaiq, Saudi Arabia
A Hung Department of Neurosurgery, Johns Hopkins University, Baltimore, MD, USA.,Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
E Schmidt Department of Neurosurgery, University Hospital Toulouse, Toulouse, France
F Ory-Magne Department of Neurology, University Hospital Toulouse, Toulouse, France.,INSER TONIC 1014, Toulouse Neuroimaging Center, Toulouse, France
P Gantet Department of Nuclear Medicine, University Hospital Toulouse, Toulouse, France
A Guenego Department of Neurosurgery, University Hospital Toulouse, Toulouse, France.,Department of Neuroradiology, University Hospital Toulouse, Toulouse, France
A C Januel Department of Neuroradiology, University Hospital Toulouse, Toulouse, France
P Tall Department of Neuroradiology, University Hospital Toulouse, Toulouse, France
N Fabre Department of Neurology, University Hospital Toulouse, Toulouse, France
L Mahieu Department of Ophtalmology, University Hospital Toulouse, Toulouse, France
C Cognard Department of Neuroradiology, University Hospital Toulouse, Toulouse, France
L Gray Department of Physiology, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
J A Buttner-Ennever Anatomy and Cell Biology, Ludwig-Maximilians-University, Munich, Germany
K Takagi Normal Pressure Hydrocephalus Center, Kashiwa-Tanaka Hospital, Kashiwa, Japan
K Onouchi Department of Neurology, Kashiwa-Tanaka Hospital, Kashiwa, Japan
S D Thompson The National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
L D Thorne The National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
H M Tully Department of Neurology, University of Washington, Seattle, WA, USA
T L Wenger Department of Pediatrics, University of Washington, Seattle, WA, USA
W A Kukull Department of Epidemiology, University of Washington, Seattle, WA, USA
D Doherty Department of Pediatrics, University of Washington, Seattle, WA, USA
W B Dobyns Department of Pediatrics, University of Washington, Seattle, WA, USA
D Moran Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
S Vakili Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
M A Patel Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
B Elder Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
C R Goodwin Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
J A Crawford Department of Psychiatry and Behavioral Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
M V Pletnikov Department of Psychiatry and Behavioral Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
J Xu F. M. Kirby Research Center for Functional Brain Imaging at the Kennedy Krieger Institute, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
A Blitz Department of Radiology and Radiological Science, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
D A Herzka Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA
H Guerrero-Cazares Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
A Quiñones-Hinojosa Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA.,Department of Oncology, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
S Mori Department of Radiology-Magnetic Resonance Research, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
P Saavedra Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
H Treviño Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
K Maitani Department of Neurosurgery, Johns Hopkins University, School of Medicine, Baltimore, MD, USA.,Tohoku University School of Medicine, Sendai, Japan
W C Ziai Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
V Eslami Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
S Nekoovaght-Tak Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
R Dlugash Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
G Yenokyan Department of Biostatistics, The Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA
N McBee Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
D F Hanley Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA

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Rajagopal A, Shimony JS, McKinstry RC, Altaye M, Maloney T, Mangano FT, Limbrick DD, Holland SK, Jones BV, Simpson S, Mercer D, Yuan W. White matter microstructural abnormality in children with hydrocephalus detected by probabilistic diffusion tractography. AJNR Am J Neuroradiol 2013;34:2379-85. [PMID: 24072621 DOI: 10.3174/ajnr.a3737] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]

Abstract

BACKGROUND AND PURPOSE

Hydrocephalus is a severe pathologic condition in which WM damage is a major factor associated with poor outcomes. The goal of the study was to investigate tract-based WM connectivity and DTI measurements in children with hydrocephalus by using the probabilistic diffusion tractography method.

MATERIALS AND METHODS

Twelve children with hydrocephalus and 16 age-matched controls were included in the study. Probabilistic diffusion tractography was conducted to generate tract-based connectivity distribution and DTI measures for the genu of the corpus callosum and the connectivity index. Tract-based summary measurements, including the connectivity index and DTI measures (fractional anisotropy, mean diffusivity, axial diffusivity, and radial diffusivity), were calculated and compared between the 2 study groups.

RESULTS

Tract-based summary measurement showed a higher percentage of voxels with lower normalized connectivity index values in the WM tracts in children with hydrocephalus. In the genu of the corpus callosum, the left midsegment of the corticospinal tract, and the right midsegment of the corticospinal tract, the normalized connectivity index value in children with hydrocephalus was found to be significantly lower (P < .05, corrected). The tract-based DTI measures showed that the children with hydrocephalus had significantly higher mean diffusivity, axial diffusivity, and radial diffusivity in the genu of the corpus callosum, left midsegment of the corticospinal tract, and right midsegment of corticospinal tract and lower fractional anisotropy in the genu of the corpus callosum (P < .05, corrected).

CONCLUSIONS

The analysis of WM connectivity showed that the probabilistic diffusion tractography method is a sensitive tool to detect the decreased continuity in WM tracts that are under the direct influence of mechanical distortion and increased intracranial pressure in hydrocephalus. This voxel-based connectivity method can provide quantitative information complementary to the standard DTI summary measures.

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Yuan W, McKinstry RC, Shimony JS, Altaye M, Powell SK, Phillips JM, Limbrick DD, Holland SK, Jones BV, Rajagopal A, Simpson S, Mercer D, Mangano FT. Diffusion tensor imaging properties and neurobehavioral outcomes in children with hydrocephalus. AJNR Am J Neuroradiol 2013;34:439-45. [PMID: 22899790 DOI: 10.3174/ajnr.a3218] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]

Wrede B, Peters O, Kordes U, Kutluk T, Hasselblatt M, Rytting M, Rutkowski S, Mahajan A, Pietsch T, Thall P, Wolff JE, Wolff JE, Thall P, Pfister S, Rytting M, Bingham R, Vats T, Rokes C, Mahajan A, Brown R, Creach KM, Rubin JB, Leonard JR, Limbrick DD, Smyth MD, Dacey RG, Rich KM, Dowling JL, Linette GP, King AA, Michalski JM, Simpson JR, Park TS, Perry A, Mansur DB, Gururangan S, Panandikar AP, Broniscer A, Huang A, Kellie S, Ellison D, Gajjar A, Aguilera D, Goldman S, Tomita T, Fangusaro J, Gururangan S, Fangusaro J, Poussaint TY, Onar A, Gilbertson R, Packer R, McClendon R, Friedman H, Boyett J, Broniscer A, Baker JN, Tagen M, Onar-Thomas A, Gilbertson RJ, Davidoff AM, Pai-Panandiker A, Leung W, Chin TK, Stewart CF, Kocak M, Rowland C, Merchant TE, Kaste S, Gajjar A, Allen J, Donahue B, Mathew J, Kretschmar C, Pollack I, Jakacki R, Massimino M, Biassoni V, Gandola L, Ferroli P, Bongarzone I, Spreafico F, Pecori E, Schiavello E, Modena P, Bach F, Potepan P, Slavc I, Peyrl A, Czech T, Haberler C, Dieckmann K, Brown RJ, Dhall G, Marachelian A, Gozali A, Butturini A, Gilles F, Thompson SJ, Gardner S, Finlay JL, Brown RJ, Dhall G, Goldman S, Eisenstat DD, Gilles F, Evans A, Finlay JL. Pediatrics Clinical Research. Neuro Oncol 2010. [DOI: 10.1093/neuonc/noq116.s11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open

Limbrick DD, Wright NM. Verification of nerve root decompression during minimally-invasive lumbar microdiskectomy: a practical application of surgeon-driven evoked EMG. ACTA ACUST UNITED AC 2006;48:273-7. [PMID: 16320188 DOI: 10.1055/s-2005-915594] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]

Limbrick DD, Sombati S, DeLorenzo RJ. Calcium influx constitutes the ionic basis for the maintenance of glutamate-induced extended neuronal depolarization associated with hippocampal neuronal death. Cell Calcium 2003;33:69-81. [PMID: 12531183 DOI: 10.1016/s0143-4160(02)00054-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]

Abstract

Excessive activation of neuronal glutamate receptors has been implicated in the pathophysiology of stroke, epilepsy, and traumatic brain injury. Previously, it has been demonstrated that excitotoxic glutamate exposure results in the induction of an extended neuronal depolarization (END), as well as protracted elevations in free intracellular calcium ([Ca(2+)](i)). Both END and the prolonged [Ca(2+)](i) elevations were shown to correlate with subsequent neuronal death. In the current study, we used whole-cell current-clamp electrophysiology and fura-ff Ca(2+) imaging to determine the electrophysiological basis of END. We found that removal of extracellular Ca(2+) but not Na(+) in the post-glutamate period resulted in complete reversal of END, allowing neurons to rapidly repolarize to their initial resting membrane potential (RMP). In addition, removal of extracellular Ca(2+) was sufficient to eliminate the protracted [Ca(2+)](i) elevations induced by excitotoxic glutamate exposure. To investigate the mechanism through which extracellular Ca(2+) was effecting these changes, pharmacological antagonists of well-characterized routes of Ca(2+) entry were tested for their effects on END. Antagonists of glutamate receptors and voltage-gated Ca(2+) channels (VGCCs) had no significant effect on the membrane potential of neurons in END. Likewise, inhibitors of the Na(+)/Ca(2+) exchange (NCX) were ineffective. In contrast, addition of 500 microM ZnCl(2) or 100 microM GdCl(3) to control extracellular medium (containing normal levels of extracellular Ca(2+)) in the post-glutamate period resulted in rapid and complete reversal of END. Addition of 1mM CdCl(2) to control medium had only modest effects on END. These data provide the first direct evidence that END induced by excitotoxic glutamate exposure is caused by an influx of extracellular Ca(2+) and demonstrate that the previously irreversible condition of END can be reversed by removing extracellular Ca(2+). In addition, understanding the electrophysiological basis of this novel Ca(2+)-induced extended depolarization may provide an insight into the pathophysiology of stroke, traumatic brain injury, and other forms of neuronal injury.

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Limbrick DD, Pal S, DeLorenzo RJ. Hippocampal neurons exhibit both persistent Ca2+ influx and impairment of Ca2+ sequestration/extrusion mechanisms following excitotoxic glutamate exposure. Brain Res 2001;894:56-67. [PMID: 11245815 DOI: 10.1016/s0006-8993(00)03303-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]

Abstract

Exposure of neurons to glutamate is an essential element of neuronal function, producing transient elevations in free intracellular calcium ([Ca2+]i) that are required for normal physiological processes. However, prolonged elevations in [Ca2+]i have been observed following glutamate excitotoxicity and have been implicated in the pathophysiology of delayed neuronal cell death. In the current study, we utilized indo-1 and fura-2ff Ca2+ imaging techniques to determine if glutamate-induced prolonged elevations in [Ca2+]i were due to persistent influx of extracellular Ca2+ or from impairment of neuronal Ca2+ extrusion/sequestration mechanisms. By experimentally removing Ca2+ from the extracellular solution following glutamate exposure, influx of Ca2+ into the neurons was severely attenuated. We observed that brief glutamate exposures (<5 min, 50 microM glutamate) resulted in a Ca2+ influx that continued after the removal of glutamate. The Ca2+ influx was reversible, and the cell was able to effectively restore [Ca2+]i to resting levels. Longer, excitotoxic glutamate exposures (> or = 5 min) generated a Ca2+ influx that continued for the duration of the recording period (>1 h). This persistent Ca2+ influx was not primarily mediated through traditionally recognized Ca2+ channels such as glutamate receptor-operated channels or voltage-gated Ca2+ channels. In addition to the persistent Ca2+ influx, longer glutamate exposures also produced a lasting disruption of Ca2+ extrusion/sequestration mechanisms, impairing the ability of the neuron to restore resting [Ca2+]i. These data suggest that glutamate-induced protracted [Ca2+]i elevations result from at least two independent, simultaneously occurring alterations in neuronal Ca2+ physiology, including a persistent Ca2+ influx and damage to Ca2+ regulation mechanisms.

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Pal S, Limbrick DD, Rafiq A, DeLorenzo RJ. Induction of spontaneous recurrent epileptiform discharges causes long-term changes in intracellular calcium homeostatic mechanisms. Cell Calcium 2000;28:181-93. [PMID: 11020380 DOI: 10.1054/ceca.2000.0146] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]

Abstract

Calcium and calcium-dependent systems have been long implicated in the induction of epilepsy. We have previously observed that intracellular calcium ([Ca2+]i) levels remain elevated in cells undergoing epileptogenesis in the hippocampal neuronal culture (HNC) model. In this study, we employed the hippocampal neuronal culture (HNC) model of in vitro 'epilepsy' which produces spontaneous recurrent epileptiform discharges (SREDs) for the life of the neurons in culture to investigate alterations in [Ca2+]i homeostatic mechanisms that may be associated with the 'epileptic' phenotype. [Ca2+]i imaging fluorescence microscopy was performed on control and 'epileptic' neurons with two different fluorescent dyes ranging from high to low affinities for [Ca2+]i. We measured baseline [Ca2+]i levels and the ability to restore resting [Ca2+]i levels after a brief 2-min exposure to the excitatory amino acid glutamate in control neurons and neurons with SREDs. Neurons manifesting SREDs had statistically significantly higher baseline [Ca2+]i levels that persisted for the life of the culture. In addition, the 'epileptic' phenotype was associated with an inability to rapidly restore [Ca2+]i levels to baseline following a glutamate induced [Ca2+]i load. The use of the low affinity dye Fura-FF demonstrated that the difference in restoring baseline [Ca2+]i levels was not due to saturation of the high affinity dye Indo-1, which was utilized for evaluating the [Ca2+]i kinetics at lower [Ca2+]i levels. Peak [Ca2+]i levels in response to glutamate were the same in both 'epileptic' and control neurons. While [Ca2+]i levels recovered in approximately 30 min in control cells, it took more than 90 min to reach baseline levels in cells manifesting SREDs. Alterations of [Ca2+]i homeostatic mechanisms observed with the 'epileptic' phenotype were shown to be independent of the presence of continuous SREDs and persisted for the life of the neurons in culture. Epileptogenesis was shown not to affect the degree or duration of glutamate induced neuronal depolarization in comparing control and 'epileptic' neurons. The results indicate that epileptogenesis in this in vitro model produced long-lasting alterations in [Ca2+]i regulation that may underlie the 'epileptic' phenotype and contribute to the persistent neuroplasticity changes associated with epilepsy.

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Pal S, Sombati S, Limbrick DD, DeLorenzo RJ. In vitro status epilepticus causes sustained elevation of intracellular calcium levels in hippocampal neurons. Brain Res 1999;851:20-31. [PMID: 10642824 DOI: 10.1016/s0006-8993(99)02035-1] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]

Limbrick DD, Churn SB, Sombati S, DeLorenzo RJ. Inability to restore resting intracellular calcium levels as an early indicator of delayed neuronal cell death. Brain Res 1995;690:145-56. [PMID: 8535831 DOI: 10.1016/0006-8993(95)00552-2] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]