Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases

Autores
Díaz Gómez, Andrea Romina; Nolly, Mariela Beatriz; Massarutti, Carolina; Casarini, María J.; Garciarena, Carolina Denis; Ennis, Irene Lucia; Cingolani, Horacio Eugenio; Perez, Nestor Gustavo
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Background/Aims: This study aimed to identify the signaling pathway for the proposed link between phosphodiesterase-5A (PDE5A) inhibition and decreased cardiac Na + /H + exchanger (NHE-1) activity. Methods: NHE-1 activity was assessed in rat isolated papillary muscles by the Na + -dependent initial pH i recovery from a sustained acidosis (ammonium prepulse). ERK1/2, p90RSK and NHE-1 phosphorylation state during acidosis was determined. Results: PDE5A inhibition (1 μmol/L sildenafil, SIL) did not modify basal pH i but significantly blunted pH i recovery after sustained acidosis. Although preventing ERK1/2- p90RSK signaling pathway (10 μmol/L U0126) mimicked SIL effect, SIL did not blunt the acidosis-mediated increase in kinases activation. SIL+U0126 did not show additive effect on NHE-1 activity. Then, we hypothesized that SIL could be activating phophasatases (PP1 and/or PP2A) to directly dephosphorylate NHE-1 despite preserved ERK1/2-p90RSK activation. Non-specific phosphatases inhibition (1 μmol/L okadaic acid) canceled SIL effect on pH i recovery from acidosis. Same result was observed by inhibiting PP2A either with a lower dose of okadaic acid (1 nmol/L) or, more specifically, with 100 μmol/L endothall. Consistently, NHE-1 phosphorylation at Ser703 increased after acidosis, SIL prevented this effect and PP2A inhibition (endothall) reverted SIL effect. Conclusion: We suggest that PDE5A inhibitors decrease NHE-1 phosphorylation and activity through a mechanism that involves PP2A activation. © 2010 S. Karger AG Basel.
Fil: Díaz Gómez, Andrea Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Fil: Nolly, Mariela Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Fil: Massarutti, Carolina. Universidad Nacional de La Plata. Facultad de Ciencias Médicas; Argentina
Fil: Casarini, María J.. Universidad Nacional de La Plata. Facultad de Ciencias Médicas; Argentina
Fil: Garciarena, Carolina Denis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Fil: Ennis, Irene Lucia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Fil: Cingolani, Horacio Eugenio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Fil: Perez, Nestor Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Materia
NHE-1
PHOSPHODIESTERASE 5A
PROTEIN KINASE G
PROTEIN PHOSPHATASE 2A
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:11336/143094
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/143094
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatasesDíaz Gómez, Andrea RominaNolly, Mariela BeatrizMassarutti, CarolinaCasarini, María J.Garciarena, Carolina DenisEnnis, Irene LuciaCingolani, Horacio EugenioPerez, Nestor GustavoNHE-1PHOSPHODIESTERASE 5APROTEIN KINASE GPROTEIN PHOSPHATASE 2Ahttps://purl.org/becyt/ford/3.1https://purl.org/becyt/ford/3Background/Aims: This study aimed to identify the signaling pathway for the proposed link between phosphodiesterase-5A (PDE5A) inhibition and decreased cardiac Na + /H + exchanger (NHE-1) activity. Methods: NHE-1 activity was assessed in rat isolated papillary muscles by the Na + -dependent initial pH i recovery from a sustained acidosis (ammonium prepulse). ERK1/2, p90RSK and NHE-1 phosphorylation state during acidosis was determined. Results: PDE5A inhibition (1 μmol/L sildenafil, SIL) did not modify basal pH i but significantly blunted pH i recovery after sustained acidosis. Although preventing ERK1/2- p90RSK signaling pathway (10 μmol/L U0126) mimicked SIL effect, SIL did not blunt the acidosis-mediated increase in kinases activation. SIL+U0126 did not show additive effect on NHE-1 activity. Then, we hypothesized that SIL could be activating phophasatases (PP1 and/or PP2A) to directly dephosphorylate NHE-1 despite preserved ERK1/2-p90RSK activation. Non-specific phosphatases inhibition (1 μmol/L okadaic acid) canceled SIL effect on pH i recovery from acidosis. Same result was observed by inhibiting PP2A either with a lower dose of okadaic acid (1 nmol/L) or, more specifically, with 100 μmol/L endothall. Consistently, NHE-1 phosphorylation at Ser703 increased after acidosis, SIL prevented this effect and PP2A inhibition (endothall) reverted SIL effect. Conclusion: We suggest that PDE5A inhibitors decrease NHE-1 phosphorylation and activity through a mechanism that involves PP2A activation. © 2010 S. Karger AG Basel.Fil: Díaz Gómez, Andrea Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; ArgentinaFil: Nolly, Mariela Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; ArgentinaFil: Massarutti, Carolina. Universidad Nacional de La Plata. Facultad de Ciencias Médicas; ArgentinaFil: Casarini, María J.. Universidad Nacional de La Plata. Facultad de Ciencias Médicas; ArgentinaFil: Garciarena, Carolina Denis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; ArgentinaFil: Ennis, Irene Lucia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; ArgentinaFil: Cingolani, Horacio Eugenio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; ArgentinaFil: Perez, Nestor Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; ArgentinaCell Physiol Biochem Press2010-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/143094Díaz Gómez, Andrea Romina; Nolly, Mariela Beatriz; Massarutti, Carolina; Casarini, María J.; Garciarena, Carolina Denis; et al.; Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases; Cell Physiol Biochem Press; Cellular Physiology and Biochemistry; 26; 4-5; 10-2010; 531-5401015-89871421-9778CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.karger.com/Article/Abstract/322321info:eu-repo/semantics/altIdentifier/doi/10.1159/000322321info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:27:10Zoai:ri.conicet.gov.ar:11336/143094instacron: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:34982025-10-22 11:27:11.208CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases
title Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases
spellingShingle Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases
Díaz Gómez, Andrea Romina
NHE-1
PHOSPHODIESTERASE 5A
PROTEIN KINASE G
PROTEIN PHOSPHATASE 2A
title_short Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases
title_full Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases
title_fullStr Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases
title_full_unstemmed Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases
title_sort Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases
dc.creator.none.fl_str_mv Díaz Gómez, Andrea Romina
Nolly, Mariela Beatriz
Massarutti, Carolina
Casarini, María J.
Garciarena, Carolina Denis
Ennis, Irene Lucia
Cingolani, Horacio Eugenio
Perez, Nestor Gustavo
author Díaz Gómez, Andrea Romina
author_facet Díaz Gómez, Andrea Romina
Nolly, Mariela Beatriz
Massarutti, Carolina
Casarini, María J.
Garciarena, Carolina Denis
Ennis, Irene Lucia
Cingolani, Horacio Eugenio
Perez, Nestor Gustavo
author_role author
author2 Nolly, Mariela Beatriz
Massarutti, Carolina
Casarini, María J.
Garciarena, Carolina Denis
Ennis, Irene Lucia
Cingolani, Horacio Eugenio
Perez, Nestor Gustavo
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv NHE-1
PHOSPHODIESTERASE 5A
PROTEIN KINASE G
PROTEIN PHOSPHATASE 2A
topic NHE-1
PHOSPHODIESTERASE 5A
PROTEIN KINASE G
PROTEIN PHOSPHATASE 2A
purl_subject.fl_str_mv https://purl.org/becyt/ford/3.1
https://purl.org/becyt/ford/3
dc.description.none.fl_txt_mv Background/Aims: This study aimed to identify the signaling pathway for the proposed link between phosphodiesterase-5A (PDE5A) inhibition and decreased cardiac Na + /H + exchanger (NHE-1) activity. Methods: NHE-1 activity was assessed in rat isolated papillary muscles by the Na + -dependent initial pH i recovery from a sustained acidosis (ammonium prepulse). ERK1/2, p90RSK and NHE-1 phosphorylation state during acidosis was determined. Results: PDE5A inhibition (1 μmol/L sildenafil, SIL) did not modify basal pH i but significantly blunted pH i recovery after sustained acidosis. Although preventing ERK1/2- p90RSK signaling pathway (10 μmol/L U0126) mimicked SIL effect, SIL did not blunt the acidosis-mediated increase in kinases activation. SIL+U0126 did not show additive effect on NHE-1 activity. Then, we hypothesized that SIL could be activating phophasatases (PP1 and/or PP2A) to directly dephosphorylate NHE-1 despite preserved ERK1/2-p90RSK activation. Non-specific phosphatases inhibition (1 μmol/L okadaic acid) canceled SIL effect on pH i recovery from acidosis. Same result was observed by inhibiting PP2A either with a lower dose of okadaic acid (1 nmol/L) or, more specifically, with 100 μmol/L endothall. Consistently, NHE-1 phosphorylation at Ser703 increased after acidosis, SIL prevented this effect and PP2A inhibition (endothall) reverted SIL effect. Conclusion: We suggest that PDE5A inhibitors decrease NHE-1 phosphorylation and activity through a mechanism that involves PP2A activation. © 2010 S. Karger AG Basel.
Fil: Díaz Gómez, Andrea Romina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Fil: Nolly, Mariela Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Fil: Massarutti, Carolina. Universidad Nacional de La Plata. Facultad de Ciencias Médicas; Argentina
Fil: Casarini, María J.. Universidad Nacional de La Plata. Facultad de Ciencias Médicas; Argentina
Fil: Garciarena, Carolina Denis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Fil: Ennis, Irene Lucia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Fil: Cingolani, Horacio Eugenio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
Fil: Perez, Nestor Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani". Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina
description Background/Aims: This study aimed to identify the signaling pathway for the proposed link between phosphodiesterase-5A (PDE5A) inhibition and decreased cardiac Na + /H + exchanger (NHE-1) activity. Methods: NHE-1 activity was assessed in rat isolated papillary muscles by the Na + -dependent initial pH i recovery from a sustained acidosis (ammonium prepulse). ERK1/2, p90RSK and NHE-1 phosphorylation state during acidosis was determined. Results: PDE5A inhibition (1 μmol/L sildenafil, SIL) did not modify basal pH i but significantly blunted pH i recovery after sustained acidosis. Although preventing ERK1/2- p90RSK signaling pathway (10 μmol/L U0126) mimicked SIL effect, SIL did not blunt the acidosis-mediated increase in kinases activation. SIL+U0126 did not show additive effect on NHE-1 activity. Then, we hypothesized that SIL could be activating phophasatases (PP1 and/or PP2A) to directly dephosphorylate NHE-1 despite preserved ERK1/2-p90RSK activation. Non-specific phosphatases inhibition (1 μmol/L okadaic acid) canceled SIL effect on pH i recovery from acidosis. Same result was observed by inhibiting PP2A either with a lower dose of okadaic acid (1 nmol/L) or, more specifically, with 100 μmol/L endothall. Consistently, NHE-1 phosphorylation at Ser703 increased after acidosis, SIL prevented this effect and PP2A inhibition (endothall) reverted SIL effect. Conclusion: We suggest that PDE5A inhibitors decrease NHE-1 phosphorylation and activity through a mechanism that involves PP2A activation. © 2010 S. Karger AG Basel.
publishDate 2010
dc.date.none.fl_str_mv 2010-10
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/11336/143094
Díaz Gómez, Andrea Romina; Nolly, Mariela Beatriz; Massarutti, Carolina; Casarini, María J.; Garciarena, Carolina Denis; et al.; Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases; Cell Physiol Biochem Press; Cellular Physiology and Biochemistry; 26; 4-5; 10-2010; 531-540
1015-8987
1421-9778
CONICET Digital
CONICET
url http://hdl.handle.net/11336/143094
identifier_str_mv Díaz Gómez, Andrea Romina; Nolly, Mariela Beatriz; Massarutti, Carolina; Casarini, María J.; Garciarena, Carolina Denis; et al.; Phosphodiesterase 5A inhibition decreases NHE-1 activity without altering steady state pHi: Role of phosphatases; Cell Physiol Biochem Press; Cellular Physiology and Biochemistry; 26; 4-5; 10-2010; 531-540
1015-8987
1421-9778
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/doi/10.1159/000322321
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/
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dc.publisher.none.fl_str_mv Cell Physiol Biochem Press
publisher.none.fl_str_mv Cell Physiol Biochem Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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reponame_str CONICET Digital (CONICET)
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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