Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart
- Autores
- Bell, James R.; Raaijmakers, Antonia J.A.; Curl, Claire L.; Reichelt, Melissa E.; Harding, Tristan W.; Bei, Aier; Ng, Dominic C.H.; Erickson, Jeffrey R.; Vila Petroff, Martin Gerarde; Harrap, Stephen B.; Delbridge, Lea M.D.
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- BACKGROUND: Ischemia-related arrhythmic incidence is generally lower in females (vs males), though risk is selectively increased in women with underlying cardiopathology. Ca(2+)/calmodulin dependent kinase II (CaMKII) has been implicated in ischemia/reperfusion arrhythmias, yet the role of CaMKII in the ischemic female heart has not been determined. The aim of this study was to define the role and molecular mechanism of CaMKII activation in reperfusion arrhythmias in male/female hearts. METHODS AND RESULTS: Male and female rat hearts and cardiomyocytes were subjected to multiple arrhythmogenic challenges. An increased capacity to upregulate autophosphorylated CaMKII (P-CaMKII) in Ca(2+)-challenged female hearts was associated with an enhanced ability to maintain diastolic function. In ischemia/reperfusion, female hearts (vs male) exhibited less arrhythmias (59 ± 18 vs 548 ± 9, s, p<0.05), yet had augmented P-CaMKII (2.69 ± 0.30 vs 1.50 ± 0.14, rel. units, p<0.05) and downstream phosphorylation of phospholamban (1.71 ± 0.42 vs 0.90 ± 0.10, p<0.05). In contrast, hypertrophic female hearts had more reperfusion arrhythmias and lower phospholamban phosphorylation. Isolated myocyte experiments (fura-2) confirmed Ca(2+)-handling arrhythmogenic involvement. Molecular analysis showed target specificity of CaMKII was determined by post-translational modification, with CaMKIIδB and CaMKIIδC splice variants selectively co-localized with autophosphorylation and oxidative modifications of CaMKII respectively. CONCLUSIONS: This study provides new mechanistic evidence that CaMKIIδ splice variants are selectively susceptible to autophosphorylation/oxidation, and that augmented generation of P-CaMKIIδB(Thr287) is associated with arrhythmia suppression in the female heart. Collectively these findings indicate that therapeutic approaches based on selective CaMKII splice form targeting may have potential benefit, and that sex-selective CaMKII intervention strategies may be valid.
Fil: Bell, James R.. The University Of Melbourne; Australia
Fil: Raaijmakers, Antonia J.A.. The University Of Melbourne; Australia
Fil: Curl, Claire L.. The University Of Melbourne; Australia
Fil: Reichelt, Melissa E.. The University Of Melbourne; Australia
Fil: Harding, Tristan W.. The University Of Melbourne; Australia
Fil: Bei, Aier. The University Of Melbourne; Australia
Fil: Ng, Dominic C.H.. The University Of Melbourne; Australia
Fil: Erickson, Jeffrey R.. University Of Otago; Nueva Zelanda
Fil: Vila Petroff, Martin Gerarde. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico la Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Médicas; Argentina
Fil: Harrap, Stephen B.. The University Of Melbourne; Australia
Fil: Delbridge, Lea M.D.. The University Of Melbourne; Australia - Materia
-
Ca(2+) Regulation
Cardiac Myocytes
Ischemia/Reperfusion
Sex-Specific
Ventricular Arrhythmia - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/12023
Ver los metadatos del registro completo
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oai:ri.conicet.gov.ar:11336/12023 |
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Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heartBell, James R.Raaijmakers, Antonia J.A.Curl, Claire L.Reichelt, Melissa E.Harding, Tristan W.Bei, AierNg, Dominic C.H.Erickson, Jeffrey R.Vila Petroff, Martin GerardeHarrap, Stephen B.Delbridge, Lea M.D.Ca(2+) RegulationCardiac MyocytesIschemia/ReperfusionSex-SpecificVentricular Arrhythmiahttps://purl.org/becyt/ford/3.1https://purl.org/becyt/ford/3BACKGROUND: Ischemia-related arrhythmic incidence is generally lower in females (vs males), though risk is selectively increased in women with underlying cardiopathology. Ca(2+)/calmodulin dependent kinase II (CaMKII) has been implicated in ischemia/reperfusion arrhythmias, yet the role of CaMKII in the ischemic female heart has not been determined. The aim of this study was to define the role and molecular mechanism of CaMKII activation in reperfusion arrhythmias in male/female hearts. METHODS AND RESULTS: Male and female rat hearts and cardiomyocytes were subjected to multiple arrhythmogenic challenges. An increased capacity to upregulate autophosphorylated CaMKII (P-CaMKII) in Ca(2+)-challenged female hearts was associated with an enhanced ability to maintain diastolic function. In ischemia/reperfusion, female hearts (vs male) exhibited less arrhythmias (59 ± 18 vs 548 ± 9, s, p<0.05), yet had augmented P-CaMKII (2.69 ± 0.30 vs 1.50 ± 0.14, rel. units, p<0.05) and downstream phosphorylation of phospholamban (1.71 ± 0.42 vs 0.90 ± 0.10, p<0.05). In contrast, hypertrophic female hearts had more reperfusion arrhythmias and lower phospholamban phosphorylation. Isolated myocyte experiments (fura-2) confirmed Ca(2+)-handling arrhythmogenic involvement. Molecular analysis showed target specificity of CaMKII was determined by post-translational modification, with CaMKIIδB and CaMKIIδC splice variants selectively co-localized with autophosphorylation and oxidative modifications of CaMKII respectively. CONCLUSIONS: This study provides new mechanistic evidence that CaMKIIδ splice variants are selectively susceptible to autophosphorylation/oxidation, and that augmented generation of P-CaMKIIδB(Thr287) is associated with arrhythmia suppression in the female heart. Collectively these findings indicate that therapeutic approaches based on selective CaMKII splice form targeting may have potential benefit, and that sex-selective CaMKII intervention strategies may be valid.Fil: Bell, James R.. The University Of Melbourne; AustraliaFil: Raaijmakers, Antonia J.A.. The University Of Melbourne; AustraliaFil: Curl, Claire L.. The University Of Melbourne; AustraliaFil: Reichelt, Melissa E.. The University Of Melbourne; AustraliaFil: Harding, Tristan W.. The University Of Melbourne; AustraliaFil: Bei, Aier. The University Of Melbourne; AustraliaFil: Ng, Dominic C.H.. The University Of Melbourne; AustraliaFil: Erickson, Jeffrey R.. University Of Otago; Nueva ZelandaFil: Vila Petroff, Martin Gerarde. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico la Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Médicas; ArgentinaFil: Harrap, Stephen B.. The University Of Melbourne; AustraliaFil: Delbridge, Lea M.D.. The University Of Melbourne; AustraliaElsevier Ireland2015-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/12023Bell, James R.; Raaijmakers, Antonia J.A.; Curl, Claire L.; Reichelt, Melissa E.; Harding, Tristan W.; et al.; Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart; Elsevier Ireland; International Journal Of Cardiology; 181; 2-2015; 288-2960167-5273enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijcard.2014.11.159info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0167527314023407info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:44:50Zoai:ri.conicet.gov.ar:11336/12023instacron: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 09:44:50.584CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart |
title |
Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart |
spellingShingle |
Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart Bell, James R. Ca(2+) Regulation Cardiac Myocytes Ischemia/Reperfusion Sex-Specific Ventricular Arrhythmia |
title_short |
Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart |
title_full |
Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart |
title_fullStr |
Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart |
title_full_unstemmed |
Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart |
title_sort |
Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart |
dc.creator.none.fl_str_mv |
Bell, James R. Raaijmakers, Antonia J.A. Curl, Claire L. Reichelt, Melissa E. Harding, Tristan W. Bei, Aier Ng, Dominic C.H. Erickson, Jeffrey R. Vila Petroff, Martin Gerarde Harrap, Stephen B. Delbridge, Lea M.D. |
author |
Bell, James R. |
author_facet |
Bell, James R. Raaijmakers, Antonia J.A. Curl, Claire L. Reichelt, Melissa E. Harding, Tristan W. Bei, Aier Ng, Dominic C.H. Erickson, Jeffrey R. Vila Petroff, Martin Gerarde Harrap, Stephen B. Delbridge, Lea M.D. |
author_role |
author |
author2 |
Raaijmakers, Antonia J.A. Curl, Claire L. Reichelt, Melissa E. Harding, Tristan W. Bei, Aier Ng, Dominic C.H. Erickson, Jeffrey R. Vila Petroff, Martin Gerarde Harrap, Stephen B. Delbridge, Lea M.D. |
author2_role |
author author author author author author author author author author |
dc.subject.none.fl_str_mv |
Ca(2+) Regulation Cardiac Myocytes Ischemia/Reperfusion Sex-Specific Ventricular Arrhythmia |
topic |
Ca(2+) Regulation Cardiac Myocytes Ischemia/Reperfusion Sex-Specific Ventricular Arrhythmia |
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: Ischemia-related arrhythmic incidence is generally lower in females (vs males), though risk is selectively increased in women with underlying cardiopathology. Ca(2+)/calmodulin dependent kinase II (CaMKII) has been implicated in ischemia/reperfusion arrhythmias, yet the role of CaMKII in the ischemic female heart has not been determined. The aim of this study was to define the role and molecular mechanism of CaMKII activation in reperfusion arrhythmias in male/female hearts. METHODS AND RESULTS: Male and female rat hearts and cardiomyocytes were subjected to multiple arrhythmogenic challenges. An increased capacity to upregulate autophosphorylated CaMKII (P-CaMKII) in Ca(2+)-challenged female hearts was associated with an enhanced ability to maintain diastolic function. In ischemia/reperfusion, female hearts (vs male) exhibited less arrhythmias (59 ± 18 vs 548 ± 9, s, p<0.05), yet had augmented P-CaMKII (2.69 ± 0.30 vs 1.50 ± 0.14, rel. units, p<0.05) and downstream phosphorylation of phospholamban (1.71 ± 0.42 vs 0.90 ± 0.10, p<0.05). In contrast, hypertrophic female hearts had more reperfusion arrhythmias and lower phospholamban phosphorylation. Isolated myocyte experiments (fura-2) confirmed Ca(2+)-handling arrhythmogenic involvement. Molecular analysis showed target specificity of CaMKII was determined by post-translational modification, with CaMKIIδB and CaMKIIδC splice variants selectively co-localized with autophosphorylation and oxidative modifications of CaMKII respectively. CONCLUSIONS: This study provides new mechanistic evidence that CaMKIIδ splice variants are selectively susceptible to autophosphorylation/oxidation, and that augmented generation of P-CaMKIIδB(Thr287) is associated with arrhythmia suppression in the female heart. Collectively these findings indicate that therapeutic approaches based on selective CaMKII splice form targeting may have potential benefit, and that sex-selective CaMKII intervention strategies may be valid. Fil: Bell, James R.. The University Of Melbourne; Australia Fil: Raaijmakers, Antonia J.A.. The University Of Melbourne; Australia Fil: Curl, Claire L.. The University Of Melbourne; Australia Fil: Reichelt, Melissa E.. The University Of Melbourne; Australia Fil: Harding, Tristan W.. The University Of Melbourne; Australia Fil: Bei, Aier. The University Of Melbourne; Australia Fil: Ng, Dominic C.H.. The University Of Melbourne; Australia Fil: Erickson, Jeffrey R.. University Of Otago; Nueva Zelanda Fil: Vila Petroff, Martin Gerarde. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnológico la Plata. Centro de Investigaciones Cardiovasculares "Dr. Horacio Eugenio Cingolani"; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Médicas; Argentina Fil: Harrap, Stephen B.. The University Of Melbourne; Australia Fil: Delbridge, Lea M.D.. The University Of Melbourne; Australia |
description |
BACKGROUND: Ischemia-related arrhythmic incidence is generally lower in females (vs males), though risk is selectively increased in women with underlying cardiopathology. Ca(2+)/calmodulin dependent kinase II (CaMKII) has been implicated in ischemia/reperfusion arrhythmias, yet the role of CaMKII in the ischemic female heart has not been determined. The aim of this study was to define the role and molecular mechanism of CaMKII activation in reperfusion arrhythmias in male/female hearts. METHODS AND RESULTS: Male and female rat hearts and cardiomyocytes were subjected to multiple arrhythmogenic challenges. An increased capacity to upregulate autophosphorylated CaMKII (P-CaMKII) in Ca(2+)-challenged female hearts was associated with an enhanced ability to maintain diastolic function. In ischemia/reperfusion, female hearts (vs male) exhibited less arrhythmias (59 ± 18 vs 548 ± 9, s, p<0.05), yet had augmented P-CaMKII (2.69 ± 0.30 vs 1.50 ± 0.14, rel. units, p<0.05) and downstream phosphorylation of phospholamban (1.71 ± 0.42 vs 0.90 ± 0.10, p<0.05). In contrast, hypertrophic female hearts had more reperfusion arrhythmias and lower phospholamban phosphorylation. Isolated myocyte experiments (fura-2) confirmed Ca(2+)-handling arrhythmogenic involvement. Molecular analysis showed target specificity of CaMKII was determined by post-translational modification, with CaMKIIδB and CaMKIIδC splice variants selectively co-localized with autophosphorylation and oxidative modifications of CaMKII respectively. CONCLUSIONS: This study provides new mechanistic evidence that CaMKIIδ splice variants are selectively susceptible to autophosphorylation/oxidation, and that augmented generation of P-CaMKIIδB(Thr287) is associated with arrhythmia suppression in the female heart. Collectively these findings indicate that therapeutic approaches based on selective CaMKII splice form targeting may have potential benefit, and that sex-selective CaMKII intervention strategies may be valid. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-02 |
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/11336/12023 Bell, James R.; Raaijmakers, Antonia J.A.; Curl, Claire L.; Reichelt, Melissa E.; Harding, Tristan W.; et al.; Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart; Elsevier Ireland; International Journal Of Cardiology; 181; 2-2015; 288-296 0167-5273 |
url |
http://hdl.handle.net/11336/12023 |
identifier_str_mv |
Bell, James R.; Raaijmakers, Antonia J.A.; Curl, Claire L.; Reichelt, Melissa E.; Harding, Tristan W.; et al.; Cardiac CaMKIIδ splice variants exhibit target signaling specificity and confer sex-selective arrhythmogenic actions in the ischemic-reperfused heart; Elsevier Ireland; International Journal Of Cardiology; 181; 2-2015; 288-296 0167-5273 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ijcard.2014.11.159 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0167527314023407 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier Ireland |
publisher.none.fl_str_mv |
Elsevier Ireland |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
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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1844613410625421312 |
score |
13.070432 |