Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease

Autores
Mariángelo, Juan Ignacio Elio; Di Marzio, Gabriel Darío; Gonano, Luis Alberto; Said, Maria Matilde; Mundiña, Cecilia Beatriz
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Aim: Cardiac alternans is a dynamical phenomenon linked to the genesis of severe arrhythmias and sudden cardiac death. It has been proposed that alternans is caused by alterations in Ca2+ handling by the sarcoplasmic reticulum (SR), in both the SR Ca2+ uptake and release processes. The hypertrophic myocardium is particularly prone to alternans, but the precise mechanisms underlying its increased vulnerability are not known. Methods: Mechanical alternans (intact hearts) and Ca2+ alternans (cardiac myocytes) were studied in spontaneously hypertensive rats (SHR) during the first year of age after the onset of hypertension and compared with age-matched normotensive rats. Subcellular Ca2+ alternans, T-tubule organization, SR Ca2+ uptake, and Ca2+ release refractoriness were measured. Results: The increased susceptibility of SHR to high-frequency-induced mechanical and Ca2+ alternans appeared when the hypertrophy developed, associated with an adverse remodeling of the T-tubule network (6 mo). At the subcellular level, Ca2+ discordant alternans was also observed. From 6 mo of age, SHR myocytes showed a prolongation of Ca2+ release refractoriness without alterations in the capacity of SR Ca2+ removal, measured by the frequency-dependent acceleration of relaxation. Sensitizing SR Ca2+ release channels (RyR2) by a low dose of caffeine or by an increase in extracellular Ca2+ concentration, shortened refractoriness of SR Ca2+ release, and reduced alternans in SHR hearts. Conclusions: The tuning of SR Ca2+ release refractoriness is a crucial target to prevent cardiac alternans in a hypertrophic myocardium with an adverse T-tubule remodeling.
Fil: Mariángelo, Juan Ignacio Elio. 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: Di Marzio, Gabriel Darío. 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: Gonano, Luis Alberto. 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: Said, Maria Matilde. 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: Mundiña, Cecilia 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
Materia
ALTERNANS REVERSAL
CALCIUM RELEASE REFRACTORINESS
CARDIAC ALTERNANS
HYPERTENSIVE HYPERTROPHY
T-TUBULE ORGANIZATION
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:11336/227355
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/227355
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart diseaseMariángelo, Juan Ignacio ElioDi Marzio, Gabriel DaríoGonano, Luis AlbertoSaid, Maria MatildeMundiña, Cecilia BeatrizALTERNANS REVERSALCALCIUM RELEASE REFRACTORINESSCARDIAC ALTERNANSHYPERTENSIVE HYPERTROPHYT-TUBULE ORGANIZATIONhttps://purl.org/becyt/ford/3.1https://purl.org/becyt/ford/3Aim: Cardiac alternans is a dynamical phenomenon linked to the genesis of severe arrhythmias and sudden cardiac death. It has been proposed that alternans is caused by alterations in Ca2+ handling by the sarcoplasmic reticulum (SR), in both the SR Ca2+ uptake and release processes. The hypertrophic myocardium is particularly prone to alternans, but the precise mechanisms underlying its increased vulnerability are not known. Methods: Mechanical alternans (intact hearts) and Ca2+ alternans (cardiac myocytes) were studied in spontaneously hypertensive rats (SHR) during the first year of age after the onset of hypertension and compared with age-matched normotensive rats. Subcellular Ca2+ alternans, T-tubule organization, SR Ca2+ uptake, and Ca2+ release refractoriness were measured. Results: The increased susceptibility of SHR to high-frequency-induced mechanical and Ca2+ alternans appeared when the hypertrophy developed, associated with an adverse remodeling of the T-tubule network (6 mo). At the subcellular level, Ca2+ discordant alternans was also observed. From 6 mo of age, SHR myocytes showed a prolongation of Ca2+ release refractoriness without alterations in the capacity of SR Ca2+ removal, measured by the frequency-dependent acceleration of relaxation. Sensitizing SR Ca2+ release channels (RyR2) by a low dose of caffeine or by an increase in extracellular Ca2+ concentration, shortened refractoriness of SR Ca2+ release, and reduced alternans in SHR hearts. Conclusions: The tuning of SR Ca2+ release refractoriness is a crucial target to prevent cardiac alternans in a hypertrophic myocardium with an adverse T-tubule remodeling.Fil: Mariángelo, Juan Ignacio Elio. 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: Di Marzio, Gabriel Darío. 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: Gonano, Luis Alberto. 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: Said, Maria Matilde. 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: Mundiña, Cecilia 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"; ArgentinaWiley Blackwell Publishing, Inc2023-03info: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/11336/227355Mariángelo, Juan Ignacio Elio; Di Marzio, Gabriel Darío; Gonano, Luis Alberto; Said, Maria Matilde; Mundiña, Cecilia Beatriz; Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease; Wiley Blackwell Publishing, Inc; Acta Physiologica; 238; 2; 3-2023; 1-301748-1708CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1111/apha.13969info:eu-repo/semantics/altIdentifier/doi/10.1111/apha.13969info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:34:19Zoai:ri.conicet.gov.ar:11336/227355instacron: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:34982025-10-15 15:34:19.5CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease
title Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease
spellingShingle Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease
Mariángelo, Juan Ignacio Elio
ALTERNANS REVERSAL
CALCIUM RELEASE REFRACTORINESS
CARDIAC ALTERNANS
HYPERTENSIVE HYPERTROPHY
T-TUBULE ORGANIZATION
title_short Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease
title_full Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease
title_fullStr Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease
title_full_unstemmed Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease
title_sort Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease
dc.creator.none.fl_str_mv Mariángelo, Juan Ignacio Elio
Di Marzio, Gabriel Darío
Gonano, Luis Alberto
Said, Maria Matilde
Mundiña, Cecilia Beatriz
author Mariángelo, Juan Ignacio Elio
author_facet Mariángelo, Juan Ignacio Elio
Di Marzio, Gabriel Darío
Gonano, Luis Alberto
Said, Maria Matilde
Mundiña, Cecilia Beatriz
author_role author
author2 Di Marzio, Gabriel Darío
Gonano, Luis Alberto
Said, Maria Matilde
Mundiña, Cecilia Beatriz
author2_role author
author
author
author
dc.subject.none.fl_str_mv ALTERNANS REVERSAL
CALCIUM RELEASE REFRACTORINESS
CARDIAC ALTERNANS
HYPERTENSIVE HYPERTROPHY
T-TUBULE ORGANIZATION
topic ALTERNANS REVERSAL
CALCIUM RELEASE REFRACTORINESS
CARDIAC ALTERNANS
HYPERTENSIVE HYPERTROPHY
T-TUBULE ORGANIZATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/3.1
https://purl.org/becyt/ford/3
dc.description.none.fl_txt_mv Aim: Cardiac alternans is a dynamical phenomenon linked to the genesis of severe arrhythmias and sudden cardiac death. It has been proposed that alternans is caused by alterations in Ca2+ handling by the sarcoplasmic reticulum (SR), in both the SR Ca2+ uptake and release processes. The hypertrophic myocardium is particularly prone to alternans, but the precise mechanisms underlying its increased vulnerability are not known. Methods: Mechanical alternans (intact hearts) and Ca2+ alternans (cardiac myocytes) were studied in spontaneously hypertensive rats (SHR) during the first year of age after the onset of hypertension and compared with age-matched normotensive rats. Subcellular Ca2+ alternans, T-tubule organization, SR Ca2+ uptake, and Ca2+ release refractoriness were measured. Results: The increased susceptibility of SHR to high-frequency-induced mechanical and Ca2+ alternans appeared when the hypertrophy developed, associated with an adverse remodeling of the T-tubule network (6 mo). At the subcellular level, Ca2+ discordant alternans was also observed. From 6 mo of age, SHR myocytes showed a prolongation of Ca2+ release refractoriness without alterations in the capacity of SR Ca2+ removal, measured by the frequency-dependent acceleration of relaxation. Sensitizing SR Ca2+ release channels (RyR2) by a low dose of caffeine or by an increase in extracellular Ca2+ concentration, shortened refractoriness of SR Ca2+ release, and reduced alternans in SHR hearts. Conclusions: The tuning of SR Ca2+ release refractoriness is a crucial target to prevent cardiac alternans in a hypertrophic myocardium with an adverse T-tubule remodeling.
Fil: Mariángelo, Juan Ignacio Elio. 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: Di Marzio, Gabriel Darío. 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: Gonano, Luis Alberto. 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: Said, Maria Matilde. 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: Mundiña, Cecilia 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
description Aim: Cardiac alternans is a dynamical phenomenon linked to the genesis of severe arrhythmias and sudden cardiac death. It has been proposed that alternans is caused by alterations in Ca2+ handling by the sarcoplasmic reticulum (SR), in both the SR Ca2+ uptake and release processes. The hypertrophic myocardium is particularly prone to alternans, but the precise mechanisms underlying its increased vulnerability are not known. Methods: Mechanical alternans (intact hearts) and Ca2+ alternans (cardiac myocytes) were studied in spontaneously hypertensive rats (SHR) during the first year of age after the onset of hypertension and compared with age-matched normotensive rats. Subcellular Ca2+ alternans, T-tubule organization, SR Ca2+ uptake, and Ca2+ release refractoriness were measured. Results: The increased susceptibility of SHR to high-frequency-induced mechanical and Ca2+ alternans appeared when the hypertrophy developed, associated with an adverse remodeling of the T-tubule network (6 mo). At the subcellular level, Ca2+ discordant alternans was also observed. From 6 mo of age, SHR myocytes showed a prolongation of Ca2+ release refractoriness without alterations in the capacity of SR Ca2+ removal, measured by the frequency-dependent acceleration of relaxation. Sensitizing SR Ca2+ release channels (RyR2) by a low dose of caffeine or by an increase in extracellular Ca2+ concentration, shortened refractoriness of SR Ca2+ release, and reduced alternans in SHR hearts. Conclusions: The tuning of SR Ca2+ release refractoriness is a crucial target to prevent cardiac alternans in a hypertrophic myocardium with an adverse T-tubule remodeling.
publishDate 2023
dc.date.none.fl_str_mv 2023-03
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/11336/227355
Mariángelo, Juan Ignacio Elio; Di Marzio, Gabriel Darío; Gonano, Luis Alberto; Said, Maria Matilde; Mundiña, Cecilia Beatriz; Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease; Wiley Blackwell Publishing, Inc; Acta Physiologica; 238; 2; 3-2023; 1-30
1748-1708
CONICET Digital
CONICET
url http://hdl.handle.net/11336/227355
identifier_str_mv Mariángelo, Juan Ignacio Elio; Di Marzio, Gabriel Darío; Gonano, Luis Alberto; Said, Maria Matilde; Mundiña, Cecilia Beatriz; Prolonged Ca2+ release refractoriness and T-tubule disruption as determinants of increased propensity to cardiac alternans in the hypertensive heart disease; Wiley Blackwell Publishing, Inc; Acta Physiologica; 238; 2; 3-2023; 1-30
1748-1708
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://onlinelibrary.wiley.com/doi/10.1111/apha.13969
info:eu-repo/semantics/altIdentifier/doi/10.1111/apha.13969
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 Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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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score 13.22299

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