The autocrine/paracrine loop after myocardial stretch: mineralocorticoid receptor activation
- Autores
- Ennis, Irene Lucía; Aiello, Ernesto Alejandro; Cingolani, Horacio Eugenio; Pérez, Néstor Gustavo
- Año de publicación
- 2013
- Idioma
- español castellano
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The stretch of cardiac muscle increases developed force in two phases. The first phase, which occurs rapidly, constitutes the well-known Frank-Starling mechanism and it is generally attributed to enhanced myofilament responsiveness to Ca2+. The second phase or slow force response (SFR) occurs gradually and is due to an increase in the calcium transient amplitude as a result of a stretch-triggered autocrine/paracrine mechanism. We previously showed that Ca2+ entry through reverse Na+ /Ca2+ exchange underlies the SFR, as the final step of an autocrine/paracrine cascade involving release of angiotensin II/endothelin, and a Na+ /H+ exchanger (NHE-1) activation-mediated rise in Na+ . In the present review we mainly focus on our three latest contributions to the understanding of this signalling pathway triggered by myocardial stretch: 1) The finding that an increased production of reactive oxygen species (ROS) from mitochondrial origin is critical in the activation of the NHE-1 and therefore in the genesis of the SFR; 2) the demonstration of a key role played by the transactivation of the epidermal growth factor receptor; and 3) the involvement of mineralocorticoid receptors (MR) activation in the stretch-triggered cascade leading to the SFR. Among these novel contributions, the critical role played by the MR is perhaps the most important one. This finding may conceivably provide a mechanistic explanation to the recently discovered strikingly beneficial effects of MR antagonism in humans with cardiac hypertrophy and failure.
Centro de Investigaciones Cardiovasculares - Materia
-
Ciencias Médicas
Myocardial stretch
Slow force response
Anrep effect
Mineralocorticoid receptor
Reactive oxygen species
Na+ /H+ exchanger activation - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/106483
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The autocrine/paracrine loop after myocardial stretch: mineralocorticoid receptor activationEnnis, Irene LucíaAiello, Ernesto AlejandroCingolani, Horacio EugenioPérez, Néstor GustavoCiencias MédicasMyocardial stretchSlow force responseAnrep effectMineralocorticoid receptorReactive oxygen speciesNa+ /H+ exchanger activationThe stretch of cardiac muscle increases developed force in two phases. The first phase, which occurs rapidly, constitutes the well-known Frank-Starling mechanism and it is generally attributed to enhanced myofilament responsiveness to Ca2+. The second phase or slow force response (SFR) occurs gradually and is due to an increase in the calcium transient amplitude as a result of a stretch-triggered autocrine/paracrine mechanism. We previously showed that Ca2+ entry through reverse Na+ /Ca2+ exchange underlies the SFR, as the final step of an autocrine/paracrine cascade involving release of angiotensin II/endothelin, and a Na+ /H+ exchanger (NHE-1) activation-mediated rise in Na+ . In the present review we mainly focus on our three latest contributions to the understanding of this signalling pathway triggered by myocardial stretch: 1) The finding that an increased production of reactive oxygen species (ROS) from mitochondrial origin is critical in the activation of the NHE-1 and therefore in the genesis of the SFR; 2) the demonstration of a key role played by the transactivation of the epidermal growth factor receptor; and 3) the involvement of mineralocorticoid receptors (MR) activation in the stretch-triggered cascade leading to the SFR. Among these novel contributions, the critical role played by the MR is perhaps the most important one. This finding may conceivably provide a mechanistic explanation to the recently discovered strikingly beneficial effects of MR antagonism in humans with cardiac hypertrophy and failure.Centro de Investigaciones Cardiovasculares2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf230-240http://sedici.unlp.edu.ar/handle/10915/106483spainfo:eu-repo/semantics/altIdentifier/url/http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC3780348&blobtype=pdfinfo:eu-repo/semantics/altIdentifier/issn/1875-6557info:eu-repo/semantics/altIdentifier/pmid/23909633info:eu-repo/semantics/altIdentifier/doi/10.2174/1573403x113099990034info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:23:52Zoai:sedici.unlp.edu.ar:10915/106483Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:23:53.022SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
The autocrine/paracrine loop after myocardial stretch: mineralocorticoid receptor activation |
title |
The autocrine/paracrine loop after myocardial stretch: mineralocorticoid receptor activation |
spellingShingle |
The autocrine/paracrine loop after myocardial stretch: mineralocorticoid receptor activation Ennis, Irene Lucía Ciencias Médicas Myocardial stretch Slow force response Anrep effect Mineralocorticoid receptor Reactive oxygen species Na+ /H+ exchanger activation |
title_short |
The autocrine/paracrine loop after myocardial stretch: mineralocorticoid receptor activation |
title_full |
The autocrine/paracrine loop after myocardial stretch: mineralocorticoid receptor activation |
title_fullStr |
The autocrine/paracrine loop after myocardial stretch: mineralocorticoid receptor activation |
title_full_unstemmed |
The autocrine/paracrine loop after myocardial stretch: mineralocorticoid receptor activation |
title_sort |
The autocrine/paracrine loop after myocardial stretch: mineralocorticoid receptor activation |
dc.creator.none.fl_str_mv |
Ennis, Irene Lucía Aiello, Ernesto Alejandro Cingolani, Horacio Eugenio Pérez, Néstor Gustavo |
author |
Ennis, Irene Lucía |
author_facet |
Ennis, Irene Lucía Aiello, Ernesto Alejandro Cingolani, Horacio Eugenio Pérez, Néstor Gustavo |
author_role |
author |
author2 |
Aiello, Ernesto Alejandro Cingolani, Horacio Eugenio Pérez, Néstor Gustavo |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Ciencias Médicas Myocardial stretch Slow force response Anrep effect Mineralocorticoid receptor Reactive oxygen species Na+ /H+ exchanger activation |
topic |
Ciencias Médicas Myocardial stretch Slow force response Anrep effect Mineralocorticoid receptor Reactive oxygen species Na+ /H+ exchanger activation |
dc.description.none.fl_txt_mv |
The stretch of cardiac muscle increases developed force in two phases. The first phase, which occurs rapidly, constitutes the well-known Frank-Starling mechanism and it is generally attributed to enhanced myofilament responsiveness to Ca2+. The second phase or slow force response (SFR) occurs gradually and is due to an increase in the calcium transient amplitude as a result of a stretch-triggered autocrine/paracrine mechanism. We previously showed that Ca2+ entry through reverse Na+ /Ca2+ exchange underlies the SFR, as the final step of an autocrine/paracrine cascade involving release of angiotensin II/endothelin, and a Na+ /H+ exchanger (NHE-1) activation-mediated rise in Na+ . In the present review we mainly focus on our three latest contributions to the understanding of this signalling pathway triggered by myocardial stretch: 1) The finding that an increased production of reactive oxygen species (ROS) from mitochondrial origin is critical in the activation of the NHE-1 and therefore in the genesis of the SFR; 2) the demonstration of a key role played by the transactivation of the epidermal growth factor receptor; and 3) the involvement of mineralocorticoid receptors (MR) activation in the stretch-triggered cascade leading to the SFR. Among these novel contributions, the critical role played by the MR is perhaps the most important one. This finding may conceivably provide a mechanistic explanation to the recently discovered strikingly beneficial effects of MR antagonism in humans with cardiac hypertrophy and failure. Centro de Investigaciones Cardiovasculares |
description |
The stretch of cardiac muscle increases developed force in two phases. The first phase, which occurs rapidly, constitutes the well-known Frank-Starling mechanism and it is generally attributed to enhanced myofilament responsiveness to Ca2+. The second phase or slow force response (SFR) occurs gradually and is due to an increase in the calcium transient amplitude as a result of a stretch-triggered autocrine/paracrine mechanism. We previously showed that Ca2+ entry through reverse Na+ /Ca2+ exchange underlies the SFR, as the final step of an autocrine/paracrine cascade involving release of angiotensin II/endothelin, and a Na+ /H+ exchanger (NHE-1) activation-mediated rise in Na+ . In the present review we mainly focus on our three latest contributions to the understanding of this signalling pathway triggered by myocardial stretch: 1) The finding that an increased production of reactive oxygen species (ROS) from mitochondrial origin is critical in the activation of the NHE-1 and therefore in the genesis of the SFR; 2) the demonstration of a key role played by the transactivation of the epidermal growth factor receptor; and 3) the involvement of mineralocorticoid receptors (MR) activation in the stretch-triggered cascade leading to the SFR. Among these novel contributions, the critical role played by the MR is perhaps the most important one. This finding may conceivably provide a mechanistic explanation to the recently discovered strikingly beneficial effects of MR antagonism in humans with cardiac hypertrophy and failure. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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