Effect of unsaturated fatty acids on myocardial performance, metabolism and morphology
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Medical and Biological Research |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000200019 |
Resumo: | Diets rich in saturated fatty acids are one of the most important causes of atherosclerosis in men, and have been replaced with diets rich in unsaturated fatty acids (UFA) for the prevention of this disorder. However, the effect of UFA on myocardial performance, metabolism and morphology has not been completely characterized. The objective of the present investigation was to evaluate the effects of a UFA-rich diet on cardiac muscle function, oxidative stress, and morphology. Sixty-day-old male Wistar rats were fed a control (N = 8) or a UFA-rich diet (N = 8) for 60 days. Myocardial performance was studied in isolated papillary muscle by isometric and isotonic contractions under basal conditions after calcium chloride (5.2 mM) and ß-adrenergic stimulation with 1.0 µM isoproterenol. Fragments of the left ventricle free wall were used to study oxidative stress and were analyzed by light microscopy, and the myocardial ultrastructure was examined in left ventricle papillary muscle. After 60 days the UFA-rich diet did not change myocardial function. However, it caused high lipid hydroperoxide (176 ± 5 vs 158 ± 5, P < 0.0005) and low catalase (7 ± 1 vs 9 ± 1, P < 0.005) and superoxide-dismutase (18 ± 2 vs 27 ± 5, P < 0.005) levels, and discrete morphological changes in UFA-rich diet hearts such as lipid deposits and mitochondrial membrane alterations compared to control rats. These data show that a UFA-rich diet caused myocardial oxidative stress and mild structural alterations, but did not change mechanical function. |
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Effect of unsaturated fatty acids on myocardial performance, metabolism and morphologyFatty acidsCardiac functionOxidative stressMorphologyCatalaseSuperoxide dismutaseDiets rich in saturated fatty acids are one of the most important causes of atherosclerosis in men, and have been replaced with diets rich in unsaturated fatty acids (UFA) for the prevention of this disorder. However, the effect of UFA on myocardial performance, metabolism and morphology has not been completely characterized. The objective of the present investigation was to evaluate the effects of a UFA-rich diet on cardiac muscle function, oxidative stress, and morphology. Sixty-day-old male Wistar rats were fed a control (N = 8) or a UFA-rich diet (N = 8) for 60 days. Myocardial performance was studied in isolated papillary muscle by isometric and isotonic contractions under basal conditions after calcium chloride (5.2 mM) and ß-adrenergic stimulation with 1.0 µM isoproterenol. Fragments of the left ventricle free wall were used to study oxidative stress and were analyzed by light microscopy, and the myocardial ultrastructure was examined in left ventricle papillary muscle. After 60 days the UFA-rich diet did not change myocardial function. However, it caused high lipid hydroperoxide (176 ± 5 vs 158 ± 5, P < 0.0005) and low catalase (7 ± 1 vs 9 ± 1, P < 0.005) and superoxide-dismutase (18 ± 2 vs 27 ± 5, P < 0.005) levels, and discrete morphological changes in UFA-rich diet hearts such as lipid deposits and mitochondrial membrane alterations compared to control rats. These data show that a UFA-rich diet caused myocardial oxidative stress and mild structural alterations, but did not change mechanical function.Associação Brasileira de Divulgação Científica2006-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000200019Brazilian Journal of Medical and Biological Research v.39 n.2 2006reponame:Brazilian Journal of Medical and Biological Researchinstname:Associação Brasileira de Divulgação Científica (ABDC)instacron:ABDC10.1590/S0100-879X2006000200019info:eu-repo/semantics/openAccessPinotti,M.F.Silva,M.D.P.Sugizaki,M.M.Diniz,Y.S.Sant'Ana,L.S.Aragon,F.F.Padovani,C.R.Novelli,E.L.B.Cicogna,A.C.eng2006-05-04T00:00:00Zoai:scielo:S0100-879X2006000200019Revistahttps://www.bjournal.org/https://old.scielo.br/oai/scielo-oai.phpbjournal@terra.com.br||bjournal@terra.com.br1414-431X0100-879Xopendoar:2006-05-04T00:00Brazilian Journal of Medical and Biological Research - Associação Brasileira de Divulgação Científica (ABDC)false |
dc.title.none.fl_str_mv |
Effect of unsaturated fatty acids on myocardial performance, metabolism and morphology |
title |
Effect of unsaturated fatty acids on myocardial performance, metabolism and morphology |
spellingShingle |
Effect of unsaturated fatty acids on myocardial performance, metabolism and morphology Pinotti,M.F. Fatty acids Cardiac function Oxidative stress Morphology Catalase Superoxide dismutase |
title_short |
Effect of unsaturated fatty acids on myocardial performance, metabolism and morphology |
title_full |
Effect of unsaturated fatty acids on myocardial performance, metabolism and morphology |
title_fullStr |
Effect of unsaturated fatty acids on myocardial performance, metabolism and morphology |
title_full_unstemmed |
Effect of unsaturated fatty acids on myocardial performance, metabolism and morphology |
title_sort |
Effect of unsaturated fatty acids on myocardial performance, metabolism and morphology |
author |
Pinotti,M.F. |
author_facet |
Pinotti,M.F. Silva,M.D.P. Sugizaki,M.M. Diniz,Y.S. Sant'Ana,L.S. Aragon,F.F. Padovani,C.R. Novelli,E.L.B. Cicogna,A.C. |
author_role |
author |
author2 |
Silva,M.D.P. Sugizaki,M.M. Diniz,Y.S. Sant'Ana,L.S. Aragon,F.F. Padovani,C.R. Novelli,E.L.B. Cicogna,A.C. |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Pinotti,M.F. Silva,M.D.P. Sugizaki,M.M. Diniz,Y.S. Sant'Ana,L.S. Aragon,F.F. Padovani,C.R. Novelli,E.L.B. Cicogna,A.C. |
dc.subject.por.fl_str_mv |
Fatty acids Cardiac function Oxidative stress Morphology Catalase Superoxide dismutase |
topic |
Fatty acids Cardiac function Oxidative stress Morphology Catalase Superoxide dismutase |
description |
Diets rich in saturated fatty acids are one of the most important causes of atherosclerosis in men, and have been replaced with diets rich in unsaturated fatty acids (UFA) for the prevention of this disorder. However, the effect of UFA on myocardial performance, metabolism and morphology has not been completely characterized. The objective of the present investigation was to evaluate the effects of a UFA-rich diet on cardiac muscle function, oxidative stress, and morphology. Sixty-day-old male Wistar rats were fed a control (N = 8) or a UFA-rich diet (N = 8) for 60 days. Myocardial performance was studied in isolated papillary muscle by isometric and isotonic contractions under basal conditions after calcium chloride (5.2 mM) and ß-adrenergic stimulation with 1.0 µM isoproterenol. Fragments of the left ventricle free wall were used to study oxidative stress and were analyzed by light microscopy, and the myocardial ultrastructure was examined in left ventricle papillary muscle. After 60 days the UFA-rich diet did not change myocardial function. However, it caused high lipid hydroperoxide (176 ± 5 vs 158 ± 5, P < 0.0005) and low catalase (7 ± 1 vs 9 ± 1, P < 0.005) and superoxide-dismutase (18 ± 2 vs 27 ± 5, P < 0.005) levels, and discrete morphological changes in UFA-rich diet hearts such as lipid deposits and mitochondrial membrane alterations compared to control rats. These data show that a UFA-rich diet caused myocardial oxidative stress and mild structural alterations, but did not change mechanical function. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-02-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000200019 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000200019 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0100-879X2006000200019 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Divulgação Científica |
publisher.none.fl_str_mv |
Associação Brasileira de Divulgação Científica |
dc.source.none.fl_str_mv |
Brazilian Journal of Medical and Biological Research v.39 n.2 2006 reponame:Brazilian Journal of Medical and Biological Research instname:Associação Brasileira de Divulgação Científica (ABDC) instacron:ABDC |
instname_str |
Associação Brasileira de Divulgação Científica (ABDC) |
instacron_str |
ABDC |
institution |
ABDC |
reponame_str |
Brazilian Journal of Medical and Biological Research |
collection |
Brazilian Journal of Medical and Biological Research |
repository.name.fl_str_mv |
Brazilian Journal of Medical and Biological Research - Associação Brasileira de Divulgação Científica (ABDC) |
repository.mail.fl_str_mv |
bjournal@terra.com.br||bjournal@terra.com.br |
_version_ |
1754302934313598976 |