A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdio
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0066-782X2005000200005 http://hdl.handle.net/11449/68127 |
Resumo: | Objective: To assess the effect of growth hormone (GH) on myocardial remodeling in infarcted rats. Methods: This study comprised 24 Wistar rats divided into 3 groups as follows: 1) AMI-GH group - comprising 8 rats that underwent infarction and were treated with GH; 2) AMI group - comprising 8 rats that underwent infarction and received only the diluent of the GH solution; and 3) control group (C group) - comprising 8 rats that underwent simulated infarction. After 30 days, the animals underwent functional study through echocardiography, and the changes in myocardial contractility of the isolated left ventricular (LV) papillary muscle were studied. Results: The echocardiography identified an increase in the diastolic (C=7.32±0.49; AMI=8.50±0.73; AMI-GH=9.34±0.73; P<0.05) and systolic (C=3.38±0.47, AMI=5.16±1.24; AMI-GH=5.96±1.54; P<0.05) diameters (mm) in the LV of the infarcted animals. The AMI-GH group animals had a lower ejection fraction (%) (C=0.9±0.03; AMI=0.76±0.12; AMI-GH=0.72± 0.14; P<0.05 for C vs AMI-GH) compared with those in controls. The study of the isolated left ventricular papillary muscle showed that the AMI-GH group had changes (C=1.50±0.59; AMI= 1.28±0.38; AMI-GH=1.98±0.41; P<0.05 for C vs AMI-GH) only in the tension at rest (TR - g/mm2) and in the time delta for a 50% decrease in the tension developed (TR50, ms) after stimulation with calcium (C=23.75±9.16; AMI=-16.56±14.82; AMI-GH=-4.69±8.39; P<0.05 for C vs AMI-GH) and in the delta of tension developed (TD, g/mm2) after stimulation with isoproterenol (C=0.99±0.17; AMI=0.54±0.62; AMI-GH=0.08±0.75; P<0.05 for C vs AMI-GH) compared with those in control animals. Conclusion: The early administration of GH in the experimental infarction model in rats may result in adverse effects on the process of ventricular remodeling. |
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A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdioThe early administration of growth hormone results in deleterious effects on ventricular remodeling after acute myocardial infarctionEchocardiographyHypertrophyPapillary muscleVentricular functioncalciumgrowth hormoneisoprenalineacute heart infarctionanimal experimentanimal modelanimal tissuecontrolled studydiastoledrug effectdrug utilizationechocardiographyheart left ventricle ejection fractionheart left ventricle muscleheart muscle contractilityheart muscle tensionheart papillary muscleheart ventricle remodelinghormone actionmalemuscle excitationnonhumanratrat strainsystoleAnimalsDisease Models, AnimalGrowth HormoneMaleMyocardial InfarctionRatsRats, WistarVentricular Function, LeftVentricular RemodelingObjective: To assess the effect of growth hormone (GH) on myocardial remodeling in infarcted rats. Methods: This study comprised 24 Wistar rats divided into 3 groups as follows: 1) AMI-GH group - comprising 8 rats that underwent infarction and were treated with GH; 2) AMI group - comprising 8 rats that underwent infarction and received only the diluent of the GH solution; and 3) control group (C group) - comprising 8 rats that underwent simulated infarction. After 30 days, the animals underwent functional study through echocardiography, and the changes in myocardial contractility of the isolated left ventricular (LV) papillary muscle were studied. Results: The echocardiography identified an increase in the diastolic (C=7.32±0.49; AMI=8.50±0.73; AMI-GH=9.34±0.73; P<0.05) and systolic (C=3.38±0.47, AMI=5.16±1.24; AMI-GH=5.96±1.54; P<0.05) diameters (mm) in the LV of the infarcted animals. The AMI-GH group animals had a lower ejection fraction (%) (C=0.9±0.03; AMI=0.76±0.12; AMI-GH=0.72± 0.14; P<0.05 for C vs AMI-GH) compared with those in controls. The study of the isolated left ventricular papillary muscle showed that the AMI-GH group had changes (C=1.50±0.59; AMI= 1.28±0.38; AMI-GH=1.98±0.41; P<0.05 for C vs AMI-GH) only in the tension at rest (TR - g/mm2) and in the time delta for a 50% decrease in the tension developed (TR50, ms) after stimulation with calcium (C=23.75±9.16; AMI=-16.56±14.82; AMI-GH=-4.69±8.39; P<0.05 for C vs AMI-GH) and in the delta of tension developed (TD, g/mm2) after stimulation with isoproterenol (C=0.99±0.17; AMI=0.54±0.62; AMI-GH=0.08±0.75; P<0.05 for C vs AMI-GH) compared with those in control animals. Conclusion: The early administration of GH in the experimental infarction model in rats may result in adverse effects on the process of ventricular remodeling.Universidade Federal de Vitoria Faculdade de Medicina, BotucatuFM - Clinica Medica - s/n, Cep 8618-000 Botucatu - SPUniversidade Federal do Espírito Santo (UFES)Universidade Estadual Paulista (Unesp)Mill, José G.Zornoff, Leonardo A. M.Okoshi, Marina P.Okoshi, KatashiPadovani, Carlos R.Sugisaki, MárioLeite, Cláudia M.Cicogna, Antônio C.2014-05-27T11:21:16Z2014-05-27T11:21:16Z2005-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article115-121application/pdfhttp://dx.doi.org/10.1590/S0066-782X2005000200005Arquivos Brasileiros de Cardiologia, v. 84, n. 2, p. 115-121, 2005.0066-782Xhttp://hdl.handle.net/11449/6812710.1590/S0066-782X2005000200005S0066-782X20050002000052-s2.0-152443539112-s2.0-15244353911.pdf15909715763094200000-0001-8980-8839Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporArquivos Brasileiros de Cardiologia1.318info:eu-repo/semantics/openAccess2023-11-13T06:12:15Zoai:repositorio.unesp.br:11449/68127Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-13T06:12:15Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdio The early administration of growth hormone results in deleterious effects on ventricular remodeling after acute myocardial infarction |
title |
A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdio |
spellingShingle |
A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdio Mill, José G. Echocardiography Hypertrophy Papillary muscle Ventricular function calcium growth hormone isoprenaline acute heart infarction animal experiment animal model animal tissue controlled study diastole drug effect drug utilization echocardiography heart left ventricle ejection fraction heart left ventricle muscle heart muscle contractility heart muscle tension heart papillary muscle heart ventricle remodeling hormone action male muscle excitation nonhuman rat rat strain systole Animals Disease Models, Animal Growth Hormone Male Myocardial Infarction Rats Rats, Wistar Ventricular Function, Left Ventricular Remodeling |
title_short |
A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdio |
title_full |
A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdio |
title_fullStr |
A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdio |
title_full_unstemmed |
A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdio |
title_sort |
A administração precoce de hormônio de crescimento resulta em efeitos deletérios na remodelação ventricular após o infarto agudo do miocárdio |
author |
Mill, José G. |
author_facet |
Mill, José G. Zornoff, Leonardo A. M. Okoshi, Marina P. Okoshi, Katashi Padovani, Carlos R. Sugisaki, Mário Leite, Cláudia M. Cicogna, Antônio C. |
author_role |
author |
author2 |
Zornoff, Leonardo A. M. Okoshi, Marina P. Okoshi, Katashi Padovani, Carlos R. Sugisaki, Mário Leite, Cláudia M. Cicogna, Antônio C. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal do Espírito Santo (UFES) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Mill, José G. Zornoff, Leonardo A. M. Okoshi, Marina P. Okoshi, Katashi Padovani, Carlos R. Sugisaki, Mário Leite, Cláudia M. Cicogna, Antônio C. |
dc.subject.por.fl_str_mv |
Echocardiography Hypertrophy Papillary muscle Ventricular function calcium growth hormone isoprenaline acute heart infarction animal experiment animal model animal tissue controlled study diastole drug effect drug utilization echocardiography heart left ventricle ejection fraction heart left ventricle muscle heart muscle contractility heart muscle tension heart papillary muscle heart ventricle remodeling hormone action male muscle excitation nonhuman rat rat strain systole Animals Disease Models, Animal Growth Hormone Male Myocardial Infarction Rats Rats, Wistar Ventricular Function, Left Ventricular Remodeling |
topic |
Echocardiography Hypertrophy Papillary muscle Ventricular function calcium growth hormone isoprenaline acute heart infarction animal experiment animal model animal tissue controlled study diastole drug effect drug utilization echocardiography heart left ventricle ejection fraction heart left ventricle muscle heart muscle contractility heart muscle tension heart papillary muscle heart ventricle remodeling hormone action male muscle excitation nonhuman rat rat strain systole Animals Disease Models, Animal Growth Hormone Male Myocardial Infarction Rats Rats, Wistar Ventricular Function, Left Ventricular Remodeling |
description |
Objective: To assess the effect of growth hormone (GH) on myocardial remodeling in infarcted rats. Methods: This study comprised 24 Wistar rats divided into 3 groups as follows: 1) AMI-GH group - comprising 8 rats that underwent infarction and were treated with GH; 2) AMI group - comprising 8 rats that underwent infarction and received only the diluent of the GH solution; and 3) control group (C group) - comprising 8 rats that underwent simulated infarction. After 30 days, the animals underwent functional study through echocardiography, and the changes in myocardial contractility of the isolated left ventricular (LV) papillary muscle were studied. Results: The echocardiography identified an increase in the diastolic (C=7.32±0.49; AMI=8.50±0.73; AMI-GH=9.34±0.73; P<0.05) and systolic (C=3.38±0.47, AMI=5.16±1.24; AMI-GH=5.96±1.54; P<0.05) diameters (mm) in the LV of the infarcted animals. The AMI-GH group animals had a lower ejection fraction (%) (C=0.9±0.03; AMI=0.76±0.12; AMI-GH=0.72± 0.14; P<0.05 for C vs AMI-GH) compared with those in controls. The study of the isolated left ventricular papillary muscle showed that the AMI-GH group had changes (C=1.50±0.59; AMI= 1.28±0.38; AMI-GH=1.98±0.41; P<0.05 for C vs AMI-GH) only in the tension at rest (TR - g/mm2) and in the time delta for a 50% decrease in the tension developed (TR50, ms) after stimulation with calcium (C=23.75±9.16; AMI=-16.56±14.82; AMI-GH=-4.69±8.39; P<0.05 for C vs AMI-GH) and in the delta of tension developed (TD, g/mm2) after stimulation with isoproterenol (C=0.99±0.17; AMI=0.54±0.62; AMI-GH=0.08±0.75; P<0.05 for C vs AMI-GH) compared with those in control animals. Conclusion: The early administration of GH in the experimental infarction model in rats may result in adverse effects on the process of ventricular remodeling. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-02-01 2014-05-27T11:21:16Z 2014-05-27T11:21:16Z |
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/10.1590/S0066-782X2005000200005 Arquivos Brasileiros de Cardiologia, v. 84, n. 2, p. 115-121, 2005. 0066-782X http://hdl.handle.net/11449/68127 10.1590/S0066-782X2005000200005 S0066-782X2005000200005 2-s2.0-15244353911 2-s2.0-15244353911.pdf 1590971576309420 0000-0001-8980-8839 |
url |
http://dx.doi.org/10.1590/S0066-782X2005000200005 http://hdl.handle.net/11449/68127 |
identifier_str_mv |
Arquivos Brasileiros de Cardiologia, v. 84, n. 2, p. 115-121, 2005. 0066-782X 10.1590/S0066-782X2005000200005 S0066-782X2005000200005 2-s2.0-15244353911 2-s2.0-15244353911.pdf 1590971576309420 0000-0001-8980-8839 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Arquivos Brasileiros de Cardiologia 1.318 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
115-121 application/pdf |
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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1803046462866587648 |