Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle
- Autores
- Silva, Guillermo Benjamin; Juncos, Luis Isaias; Baigorria, S. T.; Garcia, Nestor Horacio
- Año de publicación
- 2013
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Dehydration and acute reductions of blood pressure increases ADH and Ang II levels. These hormones increase transport along the distal nephron. In the thick ascending limb (TAL) ADH increases transport via cAMP, while Ang II acts via superoxide (O2-). However, the mechanism of interaction of these hormones in this segment remains unclear. The aim of this study was to explore ADH/Ang II interactions on TAL transport. For this, we measured the effects of ADH/Ang II, added sequentially to TAL suspensions from Wistar rats, on oxygen consumption (QO2) -as a transport index-, cAMP and O2-. Basal QO2 was 112+-5 nmol O2/min/mg protein. Addition of ADH (1nM) increased QO2 by 227 percent. In the presence of ADH, Ang II (1nM) elicited a QO2 transient response. During an initial 3.1+-0.7 minutes after adding Ang II, QO2 decreased 58 percent (p less than 0.03 initial vs. ADH) and then rose by 188 percent (p less than 0.03 late vs initial Ang II). We found that Losartan blocked the initial effects of Ang II and the latter blocked ADH and forskolin-stimulated cAMP. The NOS inhibitor L-NAME or the AT2 receptor antagonist PD123319 showed no effect on transported related oxygen consumption. Then, we assessed the late period after adding Ang II. The O2- scavenger tempol blocked the late Ang II effects on QO2, while Ang II increased O2- production during this period. We conclude that 1) Ang II has a transient effect on ADH-stimulated transport; 2) this effect is mediated by AT1 receptors; 3) the initial period is mediated by decreased cAMP and 4) the late period is mediated by O2-.
Fil: Silva, Guillermo Benjamin. Universidad Catolica de Córdoba. Facultad de Ciencias Químicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Juncos, Luis Isaias. Fundacion J. Robert Cade; Argentina
Fil: Baigorria, S. T.. Fundacion J. Robert Cade; Argentina
Fil: Garcia, Nestor Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Ciencias de la Salud. Universidad Nacional de Córdoba. Instituto de Investigaciones en Ciencias de la Salud; Argentina - Materia
-
Camp
Superoxide
Ang Ii
Tubular Transport - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/23700
Ver los metadatos del registro completo
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Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of HenleSilva, Guillermo BenjaminJuncos, Luis IsaiasBaigorria, S. T.Garcia, Nestor HoracioCampSuperoxideAng IiTubular Transporthttps://purl.org/becyt/ford/3.1https://purl.org/becyt/ford/3Dehydration and acute reductions of blood pressure increases ADH and Ang II levels. These hormones increase transport along the distal nephron. In the thick ascending limb (TAL) ADH increases transport via cAMP, while Ang II acts via superoxide (O2-). However, the mechanism of interaction of these hormones in this segment remains unclear. The aim of this study was to explore ADH/Ang II interactions on TAL transport. For this, we measured the effects of ADH/Ang II, added sequentially to TAL suspensions from Wistar rats, on oxygen consumption (QO2) -as a transport index-, cAMP and O2-. Basal QO2 was 112+-5 nmol O2/min/mg protein. Addition of ADH (1nM) increased QO2 by 227 percent. In the presence of ADH, Ang II (1nM) elicited a QO2 transient response. During an initial 3.1+-0.7 minutes after adding Ang II, QO2 decreased 58 percent (p less than 0.03 initial vs. ADH) and then rose by 188 percent (p less than 0.03 late vs initial Ang II). We found that Losartan blocked the initial effects of Ang II and the latter blocked ADH and forskolin-stimulated cAMP. The NOS inhibitor L-NAME or the AT2 receptor antagonist PD123319 showed no effect on transported related oxygen consumption. Then, we assessed the late period after adding Ang II. The O2- scavenger tempol blocked the late Ang II effects on QO2, while Ang II increased O2- production during this period. We conclude that 1) Ang II has a transient effect on ADH-stimulated transport; 2) this effect is mediated by AT1 receptors; 3) the initial period is mediated by decreased cAMP and 4) the late period is mediated by O2-.Fil: Silva, Guillermo Benjamin. Universidad Catolica de Córdoba. Facultad de Ciencias Químicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Juncos, Luis Isaias. Fundacion J. Robert Cade; ArgentinaFil: Baigorria, S. T.. Fundacion J. Robert Cade; ArgentinaFil: Garcia, Nestor Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Ciencias de la Salud. Universidad Nacional de Córdoba. Instituto de Investigaciones en Ciencias de la Salud; ArgentinaBiolife Sas2013-07info: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/11336/23700Silva, Guillermo Benjamin; Juncos, Luis Isaias; Baigorria, S. T.; Garcia, Nestor Horacio; Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle; Biolife Sas; Journal Of Biological Regulators And Homeostatic Agents; 27; 2; 7-2013; 569-5780393-974XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.biolifesas.org/contentsJBRHA.htminfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:50:43Zoai:ri.conicet.gov.ar:11336/23700instacron: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 09:50:43.939CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle |
title |
Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle |
spellingShingle |
Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle Silva, Guillermo Benjamin Camp Superoxide Ang Ii Tubular Transport |
title_short |
Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle |
title_full |
Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle |
title_fullStr |
Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle |
title_full_unstemmed |
Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle |
title_sort |
Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle |
dc.creator.none.fl_str_mv |
Silva, Guillermo Benjamin Juncos, Luis Isaias Baigorria, S. T. Garcia, Nestor Horacio |
author |
Silva, Guillermo Benjamin |
author_facet |
Silva, Guillermo Benjamin Juncos, Luis Isaias Baigorria, S. T. Garcia, Nestor Horacio |
author_role |
author |
author2 |
Juncos, Luis Isaias Baigorria, S. T. Garcia, Nestor Horacio |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Camp Superoxide Ang Ii Tubular Transport |
topic |
Camp Superoxide Ang Ii Tubular Transport |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/3.1 https://purl.org/becyt/ford/3 |
dc.description.none.fl_txt_mv |
Dehydration and acute reductions of blood pressure increases ADH and Ang II levels. These hormones increase transport along the distal nephron. In the thick ascending limb (TAL) ADH increases transport via cAMP, while Ang II acts via superoxide (O2-). However, the mechanism of interaction of these hormones in this segment remains unclear. The aim of this study was to explore ADH/Ang II interactions on TAL transport. For this, we measured the effects of ADH/Ang II, added sequentially to TAL suspensions from Wistar rats, on oxygen consumption (QO2) -as a transport index-, cAMP and O2-. Basal QO2 was 112+-5 nmol O2/min/mg protein. Addition of ADH (1nM) increased QO2 by 227 percent. In the presence of ADH, Ang II (1nM) elicited a QO2 transient response. During an initial 3.1+-0.7 minutes after adding Ang II, QO2 decreased 58 percent (p less than 0.03 initial vs. ADH) and then rose by 188 percent (p less than 0.03 late vs initial Ang II). We found that Losartan blocked the initial effects of Ang II and the latter blocked ADH and forskolin-stimulated cAMP. The NOS inhibitor L-NAME or the AT2 receptor antagonist PD123319 showed no effect on transported related oxygen consumption. Then, we assessed the late period after adding Ang II. The O2- scavenger tempol blocked the late Ang II effects on QO2, while Ang II increased O2- production during this period. We conclude that 1) Ang II has a transient effect on ADH-stimulated transport; 2) this effect is mediated by AT1 receptors; 3) the initial period is mediated by decreased cAMP and 4) the late period is mediated by O2-. Fil: Silva, Guillermo Benjamin. Universidad Catolica de Córdoba. Facultad de Ciencias Químicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Juncos, Luis Isaias. Fundacion J. Robert Cade; Argentina Fil: Baigorria, S. T.. Fundacion J. Robert Cade; Argentina Fil: Garcia, Nestor Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Ciencias de la Salud. Universidad Nacional de Córdoba. Instituto de Investigaciones en Ciencias de la Salud; Argentina |
description |
Dehydration and acute reductions of blood pressure increases ADH and Ang II levels. These hormones increase transport along the distal nephron. In the thick ascending limb (TAL) ADH increases transport via cAMP, while Ang II acts via superoxide (O2-). However, the mechanism of interaction of these hormones in this segment remains unclear. The aim of this study was to explore ADH/Ang II interactions on TAL transport. For this, we measured the effects of ADH/Ang II, added sequentially to TAL suspensions from Wistar rats, on oxygen consumption (QO2) -as a transport index-, cAMP and O2-. Basal QO2 was 112+-5 nmol O2/min/mg protein. Addition of ADH (1nM) increased QO2 by 227 percent. In the presence of ADH, Ang II (1nM) elicited a QO2 transient response. During an initial 3.1+-0.7 minutes after adding Ang II, QO2 decreased 58 percent (p less than 0.03 initial vs. ADH) and then rose by 188 percent (p less than 0.03 late vs initial Ang II). We found that Losartan blocked the initial effects of Ang II and the latter blocked ADH and forskolin-stimulated cAMP. The NOS inhibitor L-NAME or the AT2 receptor antagonist PD123319 showed no effect on transported related oxygen consumption. Then, we assessed the late period after adding Ang II. The O2- scavenger tempol blocked the late Ang II effects on QO2, while Ang II increased O2- production during this period. We conclude that 1) Ang II has a transient effect on ADH-stimulated transport; 2) this effect is mediated by AT1 receptors; 3) the initial period is mediated by decreased cAMP and 4) the late period is mediated by O2-. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-07 |
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/11336/23700 Silva, Guillermo Benjamin; Juncos, Luis Isaias; Baigorria, S. T.; Garcia, Nestor Horacio; Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle; Biolife Sas; Journal Of Biological Regulators And Homeostatic Agents; 27; 2; 7-2013; 569-578 0393-974X CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/23700 |
identifier_str_mv |
Silva, Guillermo Benjamin; Juncos, Luis Isaias; Baigorria, S. T.; Garcia, Nestor Horacio; Angiotensin II inhibits ADH-stimulated cAMP: role on O2- and transport-related oxygen consumption in the loop of Henle; Biolife Sas; Journal Of Biological Regulators And Homeostatic Agents; 27; 2; 7-2013; 569-578 0393-974X CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/http://www.biolifesas.org/contentsJBRHA.htm |
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 |
Biolife Sas |
publisher.none.fl_str_mv |
Biolife Sas |
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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1844613563310669824 |
score |
13.070432 |