Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate
- Autores
- Lopez, Cecilia Ines; Pelletán, Leonardo Enuar; Suhaiman, Laila; de Blas, Gerardo Andrés; Vitale, Nicolas; Mayorga, Luis Segundo; Belmonte, Silvia Alejandra
- Año de publicación
- 2012
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Acrosomal exocytosis involves a massive fusion between the outer acrosomal and the plasma membranes of the spermatozoon triggered by stimuli that open calcium channels at the plasma membrane. Diacylglycerol has been implicated in the activation of these calcium channels. Here we report that this lipid promotes the efflux of intraacrosomal calcium and triggers exocytosis in permeabilized human sperm, implying that diacylglycerol activates events downstream of the opening of plasma membrane channels. Furthermore, we show that calcium and diacylglycerol converge in a signaling pathway leading to the production of phosphatidylinositol 4,5-bisphosphate (PIP2). Addition of diacylglycerol promotes the PKC-dependent activation of PLD1. Rescue experiments adding phosphatidic acid or PIP2 and direct measurement of lipid production suggest that both PKC and PLD1 promote PIP2 synthesis. Inhibition of different steps of the pathway was reverted by adenophostin, an agonist of IP3-sensitive calcium channels, indicating that PIP2 is necessary to keep these channels opened. However, phosphatidic acid, PIP2, or adenophostin could not trigger exocytosis by themselves, indicating that diacylglycerol must also activate another factor. We found that diacylglycerol and phorbol ester stimulate the accumulation of the GTP-bound form of Rab3A. Together our results indicate that diacylglycerol promotes acrosomal exocytosis by i) maintaining high levels of IP3 – an effect that depends on a positive feedback loop leading to the production of PIP2 – and ii) stimulating the activation of Rab3A, which in turn initiates a cascade of protein interactions leading to the assembly of SNARE complexes and membrane fusion.
Fil: Lopez, Cecilia Ines. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina
Fil: Pelletán, Leonardo Enuar. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina
Fil: Suhaiman, Laila. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina
Fil: de Blas, Gerardo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; Argentina
Fil: Vitale, Nicolas. Université de Strasbourg; Francia. Centre National de la Recherche Scientifique; Francia
Fil: Mayorga, Luis Segundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; Argentina
Fil: Belmonte, Silvia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; Argentina - Materia
-
ACROSOMAL EXOCYTOSIS
DIACYLGLYCEROL
PHOSPHATIDIC ACID
PHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATE
PHOSPHOLIPASE D
REGULATED EXOCYTOSIS - 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:11336/144976
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/144976 |
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CONICET Digital (CONICET) |
spelling |
Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphateLopez, Cecilia InesPelletán, Leonardo EnuarSuhaiman, Lailade Blas, Gerardo AndrésVitale, NicolasMayorga, Luis SegundoBelmonte, Silvia AlejandraACROSOMAL EXOCYTOSISDIACYLGLYCEROLPHOSPHATIDIC ACIDPHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATEPHOSPHOLIPASE DREGULATED EXOCYTOSIShttps://purl.org/becyt/ford/3.1https://purl.org/becyt/ford/3Acrosomal exocytosis involves a massive fusion between the outer acrosomal and the plasma membranes of the spermatozoon triggered by stimuli that open calcium channels at the plasma membrane. Diacylglycerol has been implicated in the activation of these calcium channels. Here we report that this lipid promotes the efflux of intraacrosomal calcium and triggers exocytosis in permeabilized human sperm, implying that diacylglycerol activates events downstream of the opening of plasma membrane channels. Furthermore, we show that calcium and diacylglycerol converge in a signaling pathway leading to the production of phosphatidylinositol 4,5-bisphosphate (PIP2). Addition of diacylglycerol promotes the PKC-dependent activation of PLD1. Rescue experiments adding phosphatidic acid or PIP2 and direct measurement of lipid production suggest that both PKC and PLD1 promote PIP2 synthesis. Inhibition of different steps of the pathway was reverted by adenophostin, an agonist of IP3-sensitive calcium channels, indicating that PIP2 is necessary to keep these channels opened. However, phosphatidic acid, PIP2, or adenophostin could not trigger exocytosis by themselves, indicating that diacylglycerol must also activate another factor. We found that diacylglycerol and phorbol ester stimulate the accumulation of the GTP-bound form of Rab3A. Together our results indicate that diacylglycerol promotes acrosomal exocytosis by i) maintaining high levels of IP3 – an effect that depends on a positive feedback loop leading to the production of PIP2 – and ii) stimulating the activation of Rab3A, which in turn initiates a cascade of protein interactions leading to the assembly of SNARE complexes and membrane fusion.Fil: Lopez, Cecilia Ines. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; ArgentinaFil: Pelletán, Leonardo Enuar. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; ArgentinaFil: Suhaiman, Laila. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; ArgentinaFil: de Blas, Gerardo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; ArgentinaFil: Vitale, Nicolas. Université de Strasbourg; Francia. Centre National de la Recherche Scientifique; FranciaFil: Mayorga, Luis Segundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; ArgentinaFil: Belmonte, Silvia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; ArgentinaElsevier Science2012-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/144976Lopez, Cecilia Ines; Pelletán, Leonardo Enuar; Suhaiman, Laila; de Blas, Gerardo Andrés; Vitale, Nicolas; et al.; Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate; Elsevier Science; Biochimica Et Biophysica Acta - Molecular and Cell Biology of Lipids; 1821; 9; 9-2012; 1186-11991388-1981CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.bbalip.2012.05.001info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S138819811200090Xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:18:06Zoai:ri.conicet.gov.ar:11336/144976instacron: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 10:18:07.222CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate |
title |
Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate |
spellingShingle |
Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate Lopez, Cecilia Ines ACROSOMAL EXOCYTOSIS DIACYLGLYCEROL PHOSPHATIDIC ACID PHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATE PHOSPHOLIPASE D REGULATED EXOCYTOSIS |
title_short |
Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate |
title_full |
Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate |
title_fullStr |
Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate |
title_full_unstemmed |
Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate |
title_sort |
Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate |
dc.creator.none.fl_str_mv |
Lopez, Cecilia Ines Pelletán, Leonardo Enuar Suhaiman, Laila de Blas, Gerardo Andrés Vitale, Nicolas Mayorga, Luis Segundo Belmonte, Silvia Alejandra |
author |
Lopez, Cecilia Ines |
author_facet |
Lopez, Cecilia Ines Pelletán, Leonardo Enuar Suhaiman, Laila de Blas, Gerardo Andrés Vitale, Nicolas Mayorga, Luis Segundo Belmonte, Silvia Alejandra |
author_role |
author |
author2 |
Pelletán, Leonardo Enuar Suhaiman, Laila de Blas, Gerardo Andrés Vitale, Nicolas Mayorga, Luis Segundo Belmonte, Silvia Alejandra |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
ACROSOMAL EXOCYTOSIS DIACYLGLYCEROL PHOSPHATIDIC ACID PHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATE PHOSPHOLIPASE D REGULATED EXOCYTOSIS |
topic |
ACROSOMAL EXOCYTOSIS DIACYLGLYCEROL PHOSPHATIDIC ACID PHOSPHATIDYLINOSITOL 4,5-BISPHOSPHATE PHOSPHOLIPASE D REGULATED EXOCYTOSIS |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/3.1 https://purl.org/becyt/ford/3 |
dc.description.none.fl_txt_mv |
Acrosomal exocytosis involves a massive fusion between the outer acrosomal and the plasma membranes of the spermatozoon triggered by stimuli that open calcium channels at the plasma membrane. Diacylglycerol has been implicated in the activation of these calcium channels. Here we report that this lipid promotes the efflux of intraacrosomal calcium and triggers exocytosis in permeabilized human sperm, implying that diacylglycerol activates events downstream of the opening of plasma membrane channels. Furthermore, we show that calcium and diacylglycerol converge in a signaling pathway leading to the production of phosphatidylinositol 4,5-bisphosphate (PIP2). Addition of diacylglycerol promotes the PKC-dependent activation of PLD1. Rescue experiments adding phosphatidic acid or PIP2 and direct measurement of lipid production suggest that both PKC and PLD1 promote PIP2 synthesis. Inhibition of different steps of the pathway was reverted by adenophostin, an agonist of IP3-sensitive calcium channels, indicating that PIP2 is necessary to keep these channels opened. However, phosphatidic acid, PIP2, or adenophostin could not trigger exocytosis by themselves, indicating that diacylglycerol must also activate another factor. We found that diacylglycerol and phorbol ester stimulate the accumulation of the GTP-bound form of Rab3A. Together our results indicate that diacylglycerol promotes acrosomal exocytosis by i) maintaining high levels of IP3 – an effect that depends on a positive feedback loop leading to the production of PIP2 – and ii) stimulating the activation of Rab3A, which in turn initiates a cascade of protein interactions leading to the assembly of SNARE complexes and membrane fusion. Fil: Lopez, Cecilia Ines. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina Fil: Pelletán, Leonardo Enuar. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina Fil: Suhaiman, Laila. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina Fil: de Blas, Gerardo Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; Argentina Fil: Vitale, Nicolas. Université de Strasbourg; Francia. Centre National de la Recherche Scientifique; Francia Fil: Mayorga, Luis Segundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; Argentina Fil: Belmonte, Silvia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos. Universidad Nacional de Cuyo. Facultad de Ciencias Médicas. Instituto de Histología y Embriología de Mendoza Dr. Mario H. Burgos; Argentina |
description |
Acrosomal exocytosis involves a massive fusion between the outer acrosomal and the plasma membranes of the spermatozoon triggered by stimuli that open calcium channels at the plasma membrane. Diacylglycerol has been implicated in the activation of these calcium channels. Here we report that this lipid promotes the efflux of intraacrosomal calcium and triggers exocytosis in permeabilized human sperm, implying that diacylglycerol activates events downstream of the opening of plasma membrane channels. Furthermore, we show that calcium and diacylglycerol converge in a signaling pathway leading to the production of phosphatidylinositol 4,5-bisphosphate (PIP2). Addition of diacylglycerol promotes the PKC-dependent activation of PLD1. Rescue experiments adding phosphatidic acid or PIP2 and direct measurement of lipid production suggest that both PKC and PLD1 promote PIP2 synthesis. Inhibition of different steps of the pathway was reverted by adenophostin, an agonist of IP3-sensitive calcium channels, indicating that PIP2 is necessary to keep these channels opened. However, phosphatidic acid, PIP2, or adenophostin could not trigger exocytosis by themselves, indicating that diacylglycerol must also activate another factor. We found that diacylglycerol and phorbol ester stimulate the accumulation of the GTP-bound form of Rab3A. Together our results indicate that diacylglycerol promotes acrosomal exocytosis by i) maintaining high levels of IP3 – an effect that depends on a positive feedback loop leading to the production of PIP2 – and ii) stimulating the activation of Rab3A, which in turn initiates a cascade of protein interactions leading to the assembly of SNARE complexes and membrane fusion. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-09 |
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/11336/144976 Lopez, Cecilia Ines; Pelletán, Leonardo Enuar; Suhaiman, Laila; de Blas, Gerardo Andrés; Vitale, Nicolas; et al.; Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate; Elsevier Science; Biochimica Et Biophysica Acta - Molecular and Cell Biology of Lipids; 1821; 9; 9-2012; 1186-1199 1388-1981 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/144976 |
identifier_str_mv |
Lopez, Cecilia Ines; Pelletán, Leonardo Enuar; Suhaiman, Laila; de Blas, Gerardo Andrés; Vitale, Nicolas; et al.; Diacylglycerol stimulates acrosomal exocytosis by feeding into a PKC- and PLD1-dependent positive loop that continuously supplies phosphatidylinositol 4,5-bisphosphate; Elsevier Science; Biochimica Et Biophysica Acta - Molecular and Cell Biology of Lipids; 1821; 9; 9-2012; 1186-1199 1388-1981 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.bbalip.2012.05.001 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S138819811200090X |
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 |
dc.publisher.none.fl_str_mv |
Elsevier Science |
publisher.none.fl_str_mv |
Elsevier Science |
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 |
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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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1844614139911077888 |
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13.070432 |