NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane
- Autores
- Melamud, Luciana; Fernandez, Juan; Rivarola, Valeria; Di Giusto, Gisela; Ford, Paula; Villa, Andres; Capurro, Claudia Graciela
- Año de publicación
- 2012
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- NMO-IgG autoantibody selectively binds to Aquaporin-4 (AQP4), the most abundant water channel in the central nervous system, and is now considered an useful serum biomarker of neuromyelitis optica (NMO). A series of clinical and pathological observations suggest that NMO-IgG may play a central role in NMO physiopathology. In the current study we evaluated, in well-differentiated astrocytes cultures, the consequences of NMO-IgG binding on the expression pattern of AQP4 and on plasma membrane water permeability. To avoid or to facilitate AQP4 down-regulation cells were exposed to inactivated sera in two different situations (1 hour at 4°C or 12 hours at 37°C). AQP4 expression was detected by immunofluorescence studies, using a polyclonal anti-AQP4 or a human anti-IgG antibody and the water permeability coefficient was evaluated by a videomicroscopy technique. Our results showed that at low temperatures, cell exposure to either control or NMO-IgG sera does not affect neither AQP4 expression nor plasma membrane water permeability, indicating that the simple binding of NMO-IgG does not affect the water channel´s activity. However, at 37 °C, long-term exposure to NMO-IgG induced a loss of human IgG signal from the plasma membrane along with M1-AQP4 isoform removal and a significant reduction of water permeability. These results suggest that binding of NMO-IgG to cell membranes expressing AQP4 is a specific mechanism that may account for at least part of the pathogenic process.
Fil: Melamud, Luciana. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Centro Universitario de Neurologia "dr. Jose Maria Ramos Mejia".; Argentina
Fil: Fernandez, Juan. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina
Fil: Rivarola, Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina
Fil: Di Giusto, Gisela. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Ford, Paula. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Villa, Andres. Universidad de Buenos Aires. Facultad de Medicina. Centro Universitario de Neurologia "dr. Jose Maria Ramos Mejia".; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina
Fil: Capurro, Claudia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina - Materia
-
NEUROMIELITIS OPTICA
ACUAPORINA 4
PERMEABILIDAD AL AGUA
ASTROCITOS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/105642
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NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma MembraneMelamud, LucianaFernandez, JuanRivarola, ValeriaDi Giusto, GiselaFord, PaulaVilla, AndresCapurro, Claudia GracielaNEUROMIELITIS OPTICAACUAPORINA 4PERMEABILIDAD AL AGUAASTROCITOShttps://purl.org/becyt/ford/3.1https://purl.org/becyt/ford/3NMO-IgG autoantibody selectively binds to Aquaporin-4 (AQP4), the most abundant water channel in the central nervous system, and is now considered an useful serum biomarker of neuromyelitis optica (NMO). A series of clinical and pathological observations suggest that NMO-IgG may play a central role in NMO physiopathology. In the current study we evaluated, in well-differentiated astrocytes cultures, the consequences of NMO-IgG binding on the expression pattern of AQP4 and on plasma membrane water permeability. To avoid or to facilitate AQP4 down-regulation cells were exposed to inactivated sera in two different situations (1 hour at 4°C or 12 hours at 37°C). AQP4 expression was detected by immunofluorescence studies, using a polyclonal anti-AQP4 or a human anti-IgG antibody and the water permeability coefficient was evaluated by a videomicroscopy technique. Our results showed that at low temperatures, cell exposure to either control or NMO-IgG sera does not affect neither AQP4 expression nor plasma membrane water permeability, indicating that the simple binding of NMO-IgG does not affect the water channel´s activity. However, at 37 °C, long-term exposure to NMO-IgG induced a loss of human IgG signal from the plasma membrane along with M1-AQP4 isoform removal and a significant reduction of water permeability. These results suggest that binding of NMO-IgG to cell membranes expressing AQP4 is a specific mechanism that may account for at least part of the pathogenic process.Fil: Melamud, Luciana. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Centro Universitario de Neurologia "dr. Jose Maria Ramos Mejia".; ArgentinaFil: Fernandez, Juan. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; ArgentinaFil: Rivarola, Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; ArgentinaFil: Di Giusto, Gisela. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Ford, Paula. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Villa, Andres. Universidad de Buenos Aires. Facultad de Medicina. Centro Universitario de Neurologia "dr. Jose Maria Ramos Mejia".; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; ArgentinaFil: Capurro, Claudia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; ArgentinaWiley-liss, Div John Wiley & Sons Inc2012-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/105642Melamud, Luciana; Fernandez, Juan; Rivarola, Valeria; Di Giusto, Gisela; Ford, Paula; et al.; NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane; Wiley-liss, Div John Wiley & Sons Inc; Journal of Neuroscience Research; 90; 1-2012; 1240-12480360-4012CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/jnr.22822info:eu-repo/semantics/altIdentifier/doi/10.1002/jnr.22822info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:45:58Zoai:ri.conicet.gov.ar:11336/105642instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:45:59.01CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane |
title |
NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane |
spellingShingle |
NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane Melamud, Luciana NEUROMIELITIS OPTICA ACUAPORINA 4 PERMEABILIDAD AL AGUA ASTROCITOS |
title_short |
NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane |
title_full |
NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane |
title_fullStr |
NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane |
title_full_unstemmed |
NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane |
title_sort |
NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane |
dc.creator.none.fl_str_mv |
Melamud, Luciana Fernandez, Juan Rivarola, Valeria Di Giusto, Gisela Ford, Paula Villa, Andres Capurro, Claudia Graciela |
author |
Melamud, Luciana |
author_facet |
Melamud, Luciana Fernandez, Juan Rivarola, Valeria Di Giusto, Gisela Ford, Paula Villa, Andres Capurro, Claudia Graciela |
author_role |
author |
author2 |
Fernandez, Juan Rivarola, Valeria Di Giusto, Gisela Ford, Paula Villa, Andres Capurro, Claudia Graciela |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
NEUROMIELITIS OPTICA ACUAPORINA 4 PERMEABILIDAD AL AGUA ASTROCITOS |
topic |
NEUROMIELITIS OPTICA ACUAPORINA 4 PERMEABILIDAD AL AGUA ASTROCITOS |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/3.1 https://purl.org/becyt/ford/3 |
dc.description.none.fl_txt_mv |
NMO-IgG autoantibody selectively binds to Aquaporin-4 (AQP4), the most abundant water channel in the central nervous system, and is now considered an useful serum biomarker of neuromyelitis optica (NMO). A series of clinical and pathological observations suggest that NMO-IgG may play a central role in NMO physiopathology. In the current study we evaluated, in well-differentiated astrocytes cultures, the consequences of NMO-IgG binding on the expression pattern of AQP4 and on plasma membrane water permeability. To avoid or to facilitate AQP4 down-regulation cells were exposed to inactivated sera in two different situations (1 hour at 4°C or 12 hours at 37°C). AQP4 expression was detected by immunofluorescence studies, using a polyclonal anti-AQP4 or a human anti-IgG antibody and the water permeability coefficient was evaluated by a videomicroscopy technique. Our results showed that at low temperatures, cell exposure to either control or NMO-IgG sera does not affect neither AQP4 expression nor plasma membrane water permeability, indicating that the simple binding of NMO-IgG does not affect the water channel´s activity. However, at 37 °C, long-term exposure to NMO-IgG induced a loss of human IgG signal from the plasma membrane along with M1-AQP4 isoform removal and a significant reduction of water permeability. These results suggest that binding of NMO-IgG to cell membranes expressing AQP4 is a specific mechanism that may account for at least part of the pathogenic process. Fil: Melamud, Luciana. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Centro Universitario de Neurologia "dr. Jose Maria Ramos Mejia".; Argentina Fil: Fernandez, Juan. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina Fil: Rivarola, Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina Fil: Di Giusto, Gisela. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Ford, Paula. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Villa, Andres. Universidad de Buenos Aires. Facultad de Medicina. Centro Universitario de Neurologia "dr. Jose Maria Ramos Mejia".; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina Fil: Capurro, Claudia Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Ciencias Fisiológicas. Laboratorio de Biomembranas; Argentina |
description |
NMO-IgG autoantibody selectively binds to Aquaporin-4 (AQP4), the most abundant water channel in the central nervous system, and is now considered an useful serum biomarker of neuromyelitis optica (NMO). A series of clinical and pathological observations suggest that NMO-IgG may play a central role in NMO physiopathology. In the current study we evaluated, in well-differentiated astrocytes cultures, the consequences of NMO-IgG binding on the expression pattern of AQP4 and on plasma membrane water permeability. To avoid or to facilitate AQP4 down-regulation cells were exposed to inactivated sera in two different situations (1 hour at 4°C or 12 hours at 37°C). AQP4 expression was detected by immunofluorescence studies, using a polyclonal anti-AQP4 or a human anti-IgG antibody and the water permeability coefficient was evaluated by a videomicroscopy technique. Our results showed that at low temperatures, cell exposure to either control or NMO-IgG sera does not affect neither AQP4 expression nor plasma membrane water permeability, indicating that the simple binding of NMO-IgG does not affect the water channel´s activity. However, at 37 °C, long-term exposure to NMO-IgG induced a loss of human IgG signal from the plasma membrane along with M1-AQP4 isoform removal and a significant reduction of water permeability. These results suggest that binding of NMO-IgG to cell membranes expressing AQP4 is a specific mechanism that may account for at least part of the pathogenic process. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-01 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/105642 Melamud, Luciana; Fernandez, Juan; Rivarola, Valeria; Di Giusto, Gisela; Ford, Paula; et al.; NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane; Wiley-liss, Div John Wiley & Sons Inc; Journal of Neuroscience Research; 90; 1-2012; 1240-1248 0360-4012 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/105642 |
identifier_str_mv |
Melamud, Luciana; Fernandez, Juan; Rivarola, Valeria; Di Giusto, Gisela; Ford, Paula; et al.; NMO-IgG Present in Neuromyelitis Optica Patients Sera Affects AQP4 Expression and Water Permeability of Astrocytes Plasma Membrane; Wiley-liss, Div John Wiley & Sons Inc; Journal of Neuroscience Research; 90; 1-2012; 1240-1248 0360-4012 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/jnr.22822 info:eu-repo/semantics/altIdentifier/doi/10.1002/jnr.22822 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Wiley-liss, Div John Wiley & Sons Inc |
publisher.none.fl_str_mv |
Wiley-liss, Div John Wiley & Sons Inc |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613436663660544 |
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13.070432 |