Hyperactivity and altered mRNA isoform expression of the Cl¯/HCO3¯ anion-exchanger in the hypertrophied myocardium
- Autores
- Chiappe de Cingolani, Gladys Ethel; Morgan, Patricio Eduardo; Mundiña-Weilenmann, Cecilia; Casey, Joseph; Fujinaga, Jocelyne; Camilión de Hurtado, María Cristina; Cingolani, Horacio Eugenio
- Año de publicación
- 2001
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Objective: The aim was to examine the regulation of the cardiac Na+-independent Cl¯/HCO3¯ exchanger (AE) mRNA isoform expression in association to the enhanced AE activity in the hypertrophied myocardium of spontaneously hypertensive rats (SHR). Methods: AE activity was determined by the initial rates of the pHi recovery from imposed intracellular alkalinization (forward mode of exchange) and the pHi rise induced by Cl¯ removal (reverse mode). Net HCO3¯ (JHCO3¯) efflux and influx were respectively determined. AE mRNA isoforms were analyzed by Northern blot with specific probes to detect AE1, AE2 and AE3 mRNAs. Results: Initial JHCO3¯ efflux after imposed alkaline load (pHi≅7.5) was higher in SHR than in normotensive WKY rats (3.01±0.33, n=7, vs. 0.64±0.29 mM/min, n=5, P<0.05). JHCO3¯ influx induced by Cl¯ deprivation was also increased in SHR, 4.24±0.56 mM/min (n=10) versus 2.31±0.26 (n=10, P<0.05) in WKY. In arbitrary units, the 4.1-kb AE1 mRNA decreased in SHR (0.15±0.01, n=7) compared to WKY (0.29±0.06, n=7, P<0.05), whereas the 3.6-kb mRNA did not change. AE2 mRNAs were similarly expressed in WKY and SHR. Cardiac specific AE3 (cAE3) mRNA decreased in SHR, 1.10±0.16 arbitrary units (n=8) versus 1.79±0.24, (n=8, P<0.05) in WKY. Full length AE3 (flAE3) mRNA increased from 0.69±0.06 (WKY, n=8) to 1.25±0.19 arbitrary units in SHR (n=8, P<0.05). Conclusions: The increase in flAE3 mRNA expression in cardiac tissue from the SHR is an adaptive change of the hypertrophied myocardium that might be in connection with the increased activity of the AE.
Facultad de Ciencias Médicas
Centro de Investigaciones Cardiovasculares - Materia
-
Ciencias Médicas
Gene expression
Hypertension
Hypertrophy
Ion exchangers
Membrane transport - 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:10915/84718
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Hyperactivity and altered mRNA isoform expression of the Cl¯/HCO3¯ anion-exchanger in the hypertrophied myocardiumChiappe de Cingolani, Gladys EthelMorgan, Patricio EduardoMundiña-Weilenmann, CeciliaCasey, JosephFujinaga, JocelyneCamilión de Hurtado, María CristinaCingolani, Horacio EugenioCiencias MédicasGene expressionHypertensionHypertrophyIon exchangersMembrane transportObjective: The aim was to examine the regulation of the cardiac Na<SUP>+</SUP>-independent Cl¯/HCO<SUB>3</SUB>¯ exchanger (AE) mRNA isoform expression in association to the enhanced AE activity in the hypertrophied myocardium of spontaneously hypertensive rats (SHR). Methods: AE activity was determined by the initial rates of the pH<SUB>i</SUB> recovery from imposed intracellular alkalinization (forward mode of exchange) and the pH<SUB>i</SUB> rise induced by Cl¯ removal (reverse mode). Net HCO<SUB>3</SUB>¯ (J<sub>HCO<SUB>3</SUB>¯</sub>) efflux and influx were respectively determined. AE mRNA isoforms were analyzed by Northern blot with specific probes to detect AE1, AE2 and AE3 mRNAs. Results: Initial J<sub>HCO<SUB>3</SUB>¯</sub> efflux after imposed alkaline load (pH<SUB>i</SUB>≅7.5) was higher in SHR than in normotensive WKY rats (3.01±0.33, n=7, vs. 0.64±0.29 mM/min, n=5, P<0.05). J<sub>HCO<SUB>3</SUB>¯</sub> influx induced by Cl¯ deprivation was also increased in SHR, 4.24±0.56 mM/min (n=10) versus 2.31±0.26 (n=10, P<0.05) in WKY. In arbitrary units, the 4.1-kb AE1 mRNA decreased in SHR (0.15±0.01, n=7) compared to WKY (0.29±0.06, n=7, P<0.05), whereas the 3.6-kb mRNA did not change. AE2 mRNAs were similarly expressed in WKY and SHR. Cardiac specific AE3 (cAE3) mRNA decreased in SHR, 1.10±0.16 arbitrary units (n=8) versus 1.79±0.24, (n=8, P<0.05) in WKY. Full length AE3 (flAE3) mRNA increased from 0.69±0.06 (WKY, n=8) to 1.25±0.19 arbitrary units in SHR (n=8, P<0.05). Conclusions: The increase in flAE3 mRNA expression in cardiac tissue from the SHR is an adaptive change of the hypertrophied myocardium that might be in connection with the increased activity of the AE.Facultad de Ciencias MédicasCentro de Investigaciones Cardiovasculares2001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf71-79http://sedici.unlp.edu.ar/handle/10915/84718enginfo:eu-repo/semantics/altIdentifier/issn/0008-6363info:eu-repo/semantics/altIdentifier/doi/10.1016/S0008-6363(01)00276-0info: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:UNLP2025-09-29T11:16:19Zoai:sedici.unlp.edu.ar:10915/84718Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:20.084SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Hyperactivity and altered mRNA isoform expression of the Cl¯/HCO3¯ anion-exchanger in the hypertrophied myocardium |
title |
Hyperactivity and altered mRNA isoform expression of the Cl¯/HCO3¯ anion-exchanger in the hypertrophied myocardium |
spellingShingle |
Hyperactivity and altered mRNA isoform expression of the Cl¯/HCO3¯ anion-exchanger in the hypertrophied myocardium Chiappe de Cingolani, Gladys Ethel Ciencias Médicas Gene expression Hypertension Hypertrophy Ion exchangers Membrane transport |
title_short |
Hyperactivity and altered mRNA isoform expression of the Cl¯/HCO3¯ anion-exchanger in the hypertrophied myocardium |
title_full |
Hyperactivity and altered mRNA isoform expression of the Cl¯/HCO3¯ anion-exchanger in the hypertrophied myocardium |
title_fullStr |
Hyperactivity and altered mRNA isoform expression of the Cl¯/HCO3¯ anion-exchanger in the hypertrophied myocardium |
title_full_unstemmed |
Hyperactivity and altered mRNA isoform expression of the Cl¯/HCO3¯ anion-exchanger in the hypertrophied myocardium |
title_sort |
Hyperactivity and altered mRNA isoform expression of the Cl¯/HCO3¯ anion-exchanger in the hypertrophied myocardium |
dc.creator.none.fl_str_mv |
Chiappe de Cingolani, Gladys Ethel Morgan, Patricio Eduardo Mundiña-Weilenmann, Cecilia Casey, Joseph Fujinaga, Jocelyne Camilión de Hurtado, María Cristina Cingolani, Horacio Eugenio |
author |
Chiappe de Cingolani, Gladys Ethel |
author_facet |
Chiappe de Cingolani, Gladys Ethel Morgan, Patricio Eduardo Mundiña-Weilenmann, Cecilia Casey, Joseph Fujinaga, Jocelyne Camilión de Hurtado, María Cristina Cingolani, Horacio Eugenio |
author_role |
author |
author2 |
Morgan, Patricio Eduardo Mundiña-Weilenmann, Cecilia Casey, Joseph Fujinaga, Jocelyne Camilión de Hurtado, María Cristina Cingolani, Horacio Eugenio |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
Ciencias Médicas Gene expression Hypertension Hypertrophy Ion exchangers Membrane transport |
topic |
Ciencias Médicas Gene expression Hypertension Hypertrophy Ion exchangers Membrane transport |
dc.description.none.fl_txt_mv |
Objective: The aim was to examine the regulation of the cardiac Na<SUP>+</SUP>-independent Cl¯/HCO<SUB>3</SUB>¯ exchanger (AE) mRNA isoform expression in association to the enhanced AE activity in the hypertrophied myocardium of spontaneously hypertensive rats (SHR). Methods: AE activity was determined by the initial rates of the pH<SUB>i</SUB> recovery from imposed intracellular alkalinization (forward mode of exchange) and the pH<SUB>i</SUB> rise induced by Cl¯ removal (reverse mode). Net HCO<SUB>3</SUB>¯ (J<sub>HCO<SUB>3</SUB>¯</sub>) efflux and influx were respectively determined. AE mRNA isoforms were analyzed by Northern blot with specific probes to detect AE1, AE2 and AE3 mRNAs. Results: Initial J<sub>HCO<SUB>3</SUB>¯</sub> efflux after imposed alkaline load (pH<SUB>i</SUB>≅7.5) was higher in SHR than in normotensive WKY rats (3.01±0.33, n=7, vs. 0.64±0.29 mM/min, n=5, P<0.05). J<sub>HCO<SUB>3</SUB>¯</sub> influx induced by Cl¯ deprivation was also increased in SHR, 4.24±0.56 mM/min (n=10) versus 2.31±0.26 (n=10, P<0.05) in WKY. In arbitrary units, the 4.1-kb AE1 mRNA decreased in SHR (0.15±0.01, n=7) compared to WKY (0.29±0.06, n=7, P<0.05), whereas the 3.6-kb mRNA did not change. AE2 mRNAs were similarly expressed in WKY and SHR. Cardiac specific AE3 (cAE3) mRNA decreased in SHR, 1.10±0.16 arbitrary units (n=8) versus 1.79±0.24, (n=8, P<0.05) in WKY. Full length AE3 (flAE3) mRNA increased from 0.69±0.06 (WKY, n=8) to 1.25±0.19 arbitrary units in SHR (n=8, P<0.05). Conclusions: The increase in flAE3 mRNA expression in cardiac tissue from the SHR is an adaptive change of the hypertrophied myocardium that might be in connection with the increased activity of the AE. Facultad de Ciencias Médicas Centro de Investigaciones Cardiovasculares |
description |
Objective: The aim was to examine the regulation of the cardiac Na<SUP>+</SUP>-independent Cl¯/HCO<SUB>3</SUB>¯ exchanger (AE) mRNA isoform expression in association to the enhanced AE activity in the hypertrophied myocardium of spontaneously hypertensive rats (SHR). Methods: AE activity was determined by the initial rates of the pH<SUB>i</SUB> recovery from imposed intracellular alkalinization (forward mode of exchange) and the pH<SUB>i</SUB> rise induced by Cl¯ removal (reverse mode). Net HCO<SUB>3</SUB>¯ (J<sub>HCO<SUB>3</SUB>¯</sub>) efflux and influx were respectively determined. AE mRNA isoforms were analyzed by Northern blot with specific probes to detect AE1, AE2 and AE3 mRNAs. Results: Initial J<sub>HCO<SUB>3</SUB>¯</sub> efflux after imposed alkaline load (pH<SUB>i</SUB>≅7.5) was higher in SHR than in normotensive WKY rats (3.01±0.33, n=7, vs. 0.64±0.29 mM/min, n=5, P<0.05). J<sub>HCO<SUB>3</SUB>¯</sub> influx induced by Cl¯ deprivation was also increased in SHR, 4.24±0.56 mM/min (n=10) versus 2.31±0.26 (n=10, P<0.05) in WKY. In arbitrary units, the 4.1-kb AE1 mRNA decreased in SHR (0.15±0.01, n=7) compared to WKY (0.29±0.06, n=7, P<0.05), whereas the 3.6-kb mRNA did not change. AE2 mRNAs were similarly expressed in WKY and SHR. Cardiac specific AE3 (cAE3) mRNA decreased in SHR, 1.10±0.16 arbitrary units (n=8) versus 1.79±0.24, (n=8, P<0.05) in WKY. Full length AE3 (flAE3) mRNA increased from 0.69±0.06 (WKY, n=8) to 1.25±0.19 arbitrary units in SHR (n=8, P<0.05). Conclusions: The increase in flAE3 mRNA expression in cardiac tissue from the SHR is an adaptive change of the hypertrophied myocardium that might be in connection with the increased activity of the AE. |
publishDate |
2001 |
dc.date.none.fl_str_mv |
2001 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo 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://sedici.unlp.edu.ar/handle/10915/84718 |
url |
http://sedici.unlp.edu.ar/handle/10915/84718 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0008-6363 info:eu-repo/semantics/altIdentifier/doi/10.1016/S0008-6363(01)00276-0 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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