Tachycardia during the onset of one-kidney, one-clip renal hypertension: role of the renin-angiotensin system and AV3V tissue
Autor(a) principal: | |
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Data de Publicação: | 1988 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/0006-8993(88)90888-8 http://hdl.handle.net/11449/223909 |
Resumo: | We have previously demonstrated a transitory tachycardia during the early phase of one kidney, one clip (1K1C) hypertension in the rat, when the basal heart rate (HR) is measured daily under resting conditions. In the present study, in control rats, marked tachycardia (406 ± 11 vs 320 ± 4 bpm during the control period) was observed on the first day of electrolytic lesion of the anteroventral third ventricle (AV3V) region. The basal HR declined progressively thereafter and was normal 14 days after AV3V lesion. The peak of tachycardia (388 ± 12 bpm) observed 7 days after clipping in sham-lesioned rats did not occur in 1K1C AV3V-lesioned rats (318 ± 5 bpm). However, hypertension was only partially (65%) abolished in the lesioned animals (135 ± 4 vs 160 ± 3 mm Hg in the sham-lesioned 1K1C). Captopril administered per os (30 mg/kg/day) for up to 20 days produced no change in the basal HR of sham-operated rats but abolished the initial tachycardia in 1K1C rats during the development of hypertension. Captopril also delayed the onset of renal hypertension, with mean arterial pressure reaching hypertensive levels only 2 weeks after clipping. These data indicate that integrity of the AV3V region is necessary for the occurrence of tachycardia during the onset of 1K1C hypertension. Since captopril abolished the tachycardia, the activity of converting enzyme seems to be important for the appearance of this phenomenon. © 1988. |
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Tachycardia during the onset of one-kidney, one-clip renal hypertension: role of the renin-angiotensin system and AV3V tissueAngiotensin IIBaroreflexBasal heart rateBlood pressure regulationCaptoprilConverting enzyme inhibitorSympathetic nervous systemWe have previously demonstrated a transitory tachycardia during the early phase of one kidney, one clip (1K1C) hypertension in the rat, when the basal heart rate (HR) is measured daily under resting conditions. In the present study, in control rats, marked tachycardia (406 ± 11 vs 320 ± 4 bpm during the control period) was observed on the first day of electrolytic lesion of the anteroventral third ventricle (AV3V) region. The basal HR declined progressively thereafter and was normal 14 days after AV3V lesion. The peak of tachycardia (388 ± 12 bpm) observed 7 days after clipping in sham-lesioned rats did not occur in 1K1C AV3V-lesioned rats (318 ± 5 bpm). However, hypertension was only partially (65%) abolished in the lesioned animals (135 ± 4 vs 160 ± 3 mm Hg in the sham-lesioned 1K1C). Captopril administered per os (30 mg/kg/day) for up to 20 days produced no change in the basal HR of sham-operated rats but abolished the initial tachycardia in 1K1C rats during the development of hypertension. Captopril also delayed the onset of renal hypertension, with mean arterial pressure reaching hypertensive levels only 2 weeks after clipping. These data indicate that integrity of the AV3V region is necessary for the occurrence of tachycardia during the onset of 1K1C hypertension. Since captopril abolished the tachycardia, the activity of converting enzyme seems to be important for the appearance of this phenomenon. © 1988.Department of Physiology, School of Medicine of Ribeirao Preto, Ribeirao PretoDepartment of Physiology and Pathology, Faculty of Dentistry, UNESP, AraraquaraHeart Institute, University Hosital Medical School, USP, São PauloDepartment of Physiology and Pathology, Faculty of Dentistry, UNESP, AraraquaraUniversidade Estadual Paulista (UNESP)Universidade de São Paulo (USP)Menani, JoséV. [UNESP]Machado, Benedito H.Krieger, Eduardo M.Salgado, Hélio C.2022-04-28T19:53:46Z2022-04-28T19:53:46Z1988-04-19info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article295-302http://dx.doi.org/10.1016/0006-8993(88)90888-8Brain Research, v. 446, n. 2, p. 295-302, 1988.0006-8993http://hdl.handle.net/11449/22390910.1016/0006-8993(88)90888-82-s2.0-0023898643Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrain Researchinfo:eu-repo/semantics/openAccess2022-04-28T19:53:47Zoai:repositorio.unesp.br:11449/223909Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:22:25.252898Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Tachycardia during the onset of one-kidney, one-clip renal hypertension: role of the renin-angiotensin system and AV3V tissue |
title |
Tachycardia during the onset of one-kidney, one-clip renal hypertension: role of the renin-angiotensin system and AV3V tissue |
spellingShingle |
Tachycardia during the onset of one-kidney, one-clip renal hypertension: role of the renin-angiotensin system and AV3V tissue Menani, JoséV. [UNESP] Angiotensin II Baroreflex Basal heart rate Blood pressure regulation Captopril Converting enzyme inhibitor Sympathetic nervous system |
title_short |
Tachycardia during the onset of one-kidney, one-clip renal hypertension: role of the renin-angiotensin system and AV3V tissue |
title_full |
Tachycardia during the onset of one-kidney, one-clip renal hypertension: role of the renin-angiotensin system and AV3V tissue |
title_fullStr |
Tachycardia during the onset of one-kidney, one-clip renal hypertension: role of the renin-angiotensin system and AV3V tissue |
title_full_unstemmed |
Tachycardia during the onset of one-kidney, one-clip renal hypertension: role of the renin-angiotensin system and AV3V tissue |
title_sort |
Tachycardia during the onset of one-kidney, one-clip renal hypertension: role of the renin-angiotensin system and AV3V tissue |
author |
Menani, JoséV. [UNESP] |
author_facet |
Menani, JoséV. [UNESP] Machado, Benedito H. Krieger, Eduardo M. Salgado, Hélio C. |
author_role |
author |
author2 |
Machado, Benedito H. Krieger, Eduardo M. Salgado, Hélio C. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Menani, JoséV. [UNESP] Machado, Benedito H. Krieger, Eduardo M. Salgado, Hélio C. |
dc.subject.por.fl_str_mv |
Angiotensin II Baroreflex Basal heart rate Blood pressure regulation Captopril Converting enzyme inhibitor Sympathetic nervous system |
topic |
Angiotensin II Baroreflex Basal heart rate Blood pressure regulation Captopril Converting enzyme inhibitor Sympathetic nervous system |
description |
We have previously demonstrated a transitory tachycardia during the early phase of one kidney, one clip (1K1C) hypertension in the rat, when the basal heart rate (HR) is measured daily under resting conditions. In the present study, in control rats, marked tachycardia (406 ± 11 vs 320 ± 4 bpm during the control period) was observed on the first day of electrolytic lesion of the anteroventral third ventricle (AV3V) region. The basal HR declined progressively thereafter and was normal 14 days after AV3V lesion. The peak of tachycardia (388 ± 12 bpm) observed 7 days after clipping in sham-lesioned rats did not occur in 1K1C AV3V-lesioned rats (318 ± 5 bpm). However, hypertension was only partially (65%) abolished in the lesioned animals (135 ± 4 vs 160 ± 3 mm Hg in the sham-lesioned 1K1C). Captopril administered per os (30 mg/kg/day) for up to 20 days produced no change in the basal HR of sham-operated rats but abolished the initial tachycardia in 1K1C rats during the development of hypertension. Captopril also delayed the onset of renal hypertension, with mean arterial pressure reaching hypertensive levels only 2 weeks after clipping. These data indicate that integrity of the AV3V region is necessary for the occurrence of tachycardia during the onset of 1K1C hypertension. Since captopril abolished the tachycardia, the activity of converting enzyme seems to be important for the appearance of this phenomenon. © 1988. |
publishDate |
1988 |
dc.date.none.fl_str_mv |
1988-04-19 2022-04-28T19:53:46Z 2022-04-28T19:53:46Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/0006-8993(88)90888-8 Brain Research, v. 446, n. 2, p. 295-302, 1988. 0006-8993 http://hdl.handle.net/11449/223909 10.1016/0006-8993(88)90888-8 2-s2.0-0023898643 |
url |
http://dx.doi.org/10.1016/0006-8993(88)90888-8 http://hdl.handle.net/11449/223909 |
identifier_str_mv |
Brain Research, v. 446, n. 2, p. 295-302, 1988. 0006-8993 10.1016/0006-8993(88)90888-8 2-s2.0-0023898643 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brain Research |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
295-302 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128639030525952 |