Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors

Autores
German, Olga Lorena; Monaco, Sandra Tanya; Agnolazza, Daniela Luciana; Rotstein, Nora Patricia; Politi, Luis Enrique
Año de publicación
2011
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Docosahexaenoic acid (DHA), the major omega-3 polyunsaturated fatty acid in the retina, promotes the survival of rat retina photoreceptors (PR) during early development in vitro and upon oxidative stress by activating the ERK/MAPK signaling pathway. We investigated if DHA activates this pathway by direct activation of tyrosine kinase receptors (TRK) or of retinoid nuclear receptors (RXR). Using retinal neuronal cultures we determined that DHA prevented PR apoptosis at early culture times in spite of the presence of a TRK inhibitor (K252a), implying TRK are not involved in its effects. On the contrary, RXR antagonists (HX531 or PA452) inhibited DHA protection during early development in vitro and upon paraquat and H2O2-induced apoptosis. Moreover, RXR agonists (HX630 or PA024) decreased ROS production in H2O2-treated neuronal cultures, as we previously showed for DHA. To evaluate whether DHA has to be released from phospholipids to exert its protective effect, DHA-supplemented cultures were treated with a phospholipase A2 inhibitor (BEL) prior to H2O2 treatment; BEL addition blocked DHA protection on PR upon oxidative stress. These results suggest a new pathway for DHA actions in PR: it is first released from phospholipids and then activates RXR to promote PR survival
Fil: German, Olga Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
Fil: Monaco, Sandra Tanya. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
Fil: Agnolazza, Daniela Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
Fil: Rotstein, Nora Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
Fil: Politi, Luis Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
XXVI Congreso Anual de la Sociedad Argentina de Investigación en Neurociencia
Huerta Grande
Argentina
Sociedad Argentina de Investigación en Neurociencia
Materia
PHOTORECEPTORS
DOCOSAHEXAENOIC ACID
RXR
APOPTOSIS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/223180
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptorsGerman, Olga LorenaMonaco, Sandra TanyaAgnolazza, Daniela LucianaRotstein, Nora PatriciaPoliti, Luis EnriquePHOTORECEPTORSDOCOSAHEXAENOIC ACIDRXRAPOPTOSIShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Docosahexaenoic acid (DHA), the major omega-3 polyunsaturated fatty acid in the retina, promotes the survival of rat retina photoreceptors (PR) during early development in vitro and upon oxidative stress by activating the ERK/MAPK signaling pathway. We investigated if DHA activates this pathway by direct activation of tyrosine kinase receptors (TRK) or of retinoid nuclear receptors (RXR). Using retinal neuronal cultures we determined that DHA prevented PR apoptosis at early culture times in spite of the presence of a TRK inhibitor (K252a), implying TRK are not involved in its effects. On the contrary, RXR antagonists (HX531 or PA452) inhibited DHA protection during early development in vitro and upon paraquat and H2O2-induced apoptosis. Moreover, RXR agonists (HX630 or PA024) decreased ROS production in H2O2-treated neuronal cultures, as we previously showed for DHA. To evaluate whether DHA has to be released from phospholipids to exert its protective effect, DHA-supplemented cultures were treated with a phospholipase A2 inhibitor (BEL) prior to H2O2 treatment; BEL addition blocked DHA protection on PR upon oxidative stress. These results suggest a new pathway for DHA actions in PR: it is first released from phospholipids and then activates RXR to promote PR survivalFil: German, Olga Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; ArgentinaFil: Monaco, Sandra Tanya. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; ArgentinaFil: Agnolazza, Daniela Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; ArgentinaFil: Rotstein, Nora Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; ArgentinaFil: Politi, Luis Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; ArgentinaXXVI Congreso Anual de la Sociedad Argentina de Investigación en NeurocienciaHuerta GrandeArgentinaSociedad Argentina de Investigación en NeurocienciaSociedad Argentina de Investigación en Neurociencia2011info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/mswordapplication/mswordapplication/pdfhttp://hdl.handle.net/11336/223180Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors; XXVI Congreso Anual de la Sociedad Argentina de Investigación en Neurociencia; Huerta Grande; Argentina; 2011; 90-90CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://saneurociencias.org.ar/congresos-san-2/Nacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:18:57Zoai:ri.conicet.gov.ar:11336/223180instacron: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 10:18:57.564CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors
title Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors
spellingShingle Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors
German, Olga Lorena
PHOTORECEPTORS
DOCOSAHEXAENOIC ACID
RXR
APOPTOSIS
title_short Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors
title_full Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors
title_fullStr Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors
title_full_unstemmed Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors
title_sort Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors
dc.creator.none.fl_str_mv German, Olga Lorena
Monaco, Sandra Tanya
Agnolazza, Daniela Luciana
Rotstein, Nora Patricia
Politi, Luis Enrique
author German, Olga Lorena
author_facet German, Olga Lorena
Monaco, Sandra Tanya
Agnolazza, Daniela Luciana
Rotstein, Nora Patricia
Politi, Luis Enrique
author_role author
author2 Monaco, Sandra Tanya
Agnolazza, Daniela Luciana
Rotstein, Nora Patricia
Politi, Luis Enrique
author2_role author
author
author
author
dc.subject.none.fl_str_mv PHOTORECEPTORS
DOCOSAHEXAENOIC ACID
RXR
APOPTOSIS
topic PHOTORECEPTORS
DOCOSAHEXAENOIC ACID
RXR
APOPTOSIS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Docosahexaenoic acid (DHA), the major omega-3 polyunsaturated fatty acid in the retina, promotes the survival of rat retina photoreceptors (PR) during early development in vitro and upon oxidative stress by activating the ERK/MAPK signaling pathway. We investigated if DHA activates this pathway by direct activation of tyrosine kinase receptors (TRK) or of retinoid nuclear receptors (RXR). Using retinal neuronal cultures we determined that DHA prevented PR apoptosis at early culture times in spite of the presence of a TRK inhibitor (K252a), implying TRK are not involved in its effects. On the contrary, RXR antagonists (HX531 or PA452) inhibited DHA protection during early development in vitro and upon paraquat and H2O2-induced apoptosis. Moreover, RXR agonists (HX630 or PA024) decreased ROS production in H2O2-treated neuronal cultures, as we previously showed for DHA. To evaluate whether DHA has to be released from phospholipids to exert its protective effect, DHA-supplemented cultures were treated with a phospholipase A2 inhibitor (BEL) prior to H2O2 treatment; BEL addition blocked DHA protection on PR upon oxidative stress. These results suggest a new pathway for DHA actions in PR: it is first released from phospholipids and then activates RXR to promote PR survival
Fil: German, Olga Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
Fil: Monaco, Sandra Tanya. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
Fil: Agnolazza, Daniela Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
Fil: Rotstein, Nora Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
Fil: Politi, Luis Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Bioquímicas de Bahía Blanca. Universidad Nacional del Sur. Instituto de Investigaciones Bioquímicas de Bahía Blanca; Argentina
XXVI Congreso Anual de la Sociedad Argentina de Investigación en Neurociencia
Huerta Grande
Argentina
Sociedad Argentina de Investigación en Neurociencia
description Docosahexaenoic acid (DHA), the major omega-3 polyunsaturated fatty acid in the retina, promotes the survival of rat retina photoreceptors (PR) during early development in vitro and upon oxidative stress by activating the ERK/MAPK signaling pathway. We investigated if DHA activates this pathway by direct activation of tyrosine kinase receptors (TRK) or of retinoid nuclear receptors (RXR). Using retinal neuronal cultures we determined that DHA prevented PR apoptosis at early culture times in spite of the presence of a TRK inhibitor (K252a), implying TRK are not involved in its effects. On the contrary, RXR antagonists (HX531 or PA452) inhibited DHA protection during early development in vitro and upon paraquat and H2O2-induced apoptosis. Moreover, RXR agonists (HX630 or PA024) decreased ROS production in H2O2-treated neuronal cultures, as we previously showed for DHA. To evaluate whether DHA has to be released from phospholipids to exert its protective effect, DHA-supplemented cultures were treated with a phospholipase A2 inhibitor (BEL) prior to H2O2 treatment; BEL addition blocked DHA protection on PR upon oxidative stress. These results suggest a new pathway for DHA actions in PR: it is first released from phospholipids and then activates RXR to promote PR survival
publishDate 2011
dc.date.none.fl_str_mv 2011
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/223180
Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors; XXVI Congreso Anual de la Sociedad Argentina de Investigación en Neurociencia; Huerta Grande; Argentina; 2011; 90-90
CONICET Digital
CONICET
url http://hdl.handle.net/11336/223180
identifier_str_mv Activation of a retinoid orphan receptor is required for docosahexaenoic acid protection of photoreceptors; XXVI Congreso Anual de la Sociedad Argentina de Investigación en Neurociencia; Huerta Grande; Argentina; 2011; 90-90
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://saneurociencias.org.ar/congresos-san-2/
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/msword
application/msword
application/pdf
dc.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Sociedad Argentina de Investigación en Neurociencia
publisher.none.fl_str_mv Sociedad Argentina de Investigación en Neurociencia
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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instname_str 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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