Differential effects of dexamethasone on arterial stiffness, myocardial remodeling and blood pressure between normotensive and spontaneously hypertensive rats

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Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorTardelli, Lidieli P. [UNESP]-
Autor(es): dc.creatorDuchatsch, Francine [UNESP]-
Autor(es): dc.creatorHerrera, Naiara A. [UNESP]-
Autor(es): dc.creatorVicentini, Carlos Alberto [UNESP]-
Autor(es): dc.creatorOkoshi, Katashi [UNESP]-
Autor(es): dc.creatorAmaral, Sandra L. [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:49:59Z-
Data de disponibilização: dc.date.available2022-02-22T00:49:59Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/jat.4155-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/207358-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/207358-
Descrição: dc.descriptionDexamethasone (DEX)-induced hypertension is observed in normotensive rats, but little is known about the effects of DEX on spontaneously hypertensive animals (SHR). This study aimed to evaluate the effects of DEX on hemodynamics, cardiac hypertrophy and arterial stiffness in normotensive and hypertensive rats. Wistar rats and SHR were treated with DEX (50 μg/kg s.c., 14 d) or saline. Pulse wave velocity (PWV), echocardiographic parameters, blood pressure (BP), autonomic modulation and histological analyses of heart and thoracic aorta were performed. SHR had higher BP compared with Wistar, associated with autonomic unbalance to the heart. Echocardiographic changes in SHR (vs. Wistar) were suggestive of cardiac remodeling: higher relative wall thickness (RWT, +28%) and left ventricle mass index (LVMI, +26%) and lower left ventricle systolic diameter (LVSD, −19%) and LV diastolic diameter (LVDD, −10%), with slightly systolic dysfunction and preserved diastolic dysfunction. Also, SHR had lower myocardial capillary density and similar collagen deposition area. PWV was higher in SHR due to higher aortic collagen deposition. DEX-treated Wistar rats presented higher BP (~23%) and autonomic unbalance. DEX did not change cardiac structure in Wistar, but PWV (+21%) and aortic collagen deposition area (+21%) were higher compared with control. On the other side, DEX did not change BP or autonomic balance to the heart in SHR, but reduced RWT and LV collagen deposition area (−12% vs. SHRCT). In conclusion, the results suggest a differential effect of dexamethasone on arterial stiffness, myocardial remodeling and blood pressure between normotensive and spontaneously hypertensive rats.-
Descrição: dc.descriptionJoint Graduate Program in Physiological Sciences PIPGCF UFSCar/UNESP-
Descrição: dc.descriptionDepartment of Biology School of Sciences São Paulo State University (UNESP)-
Descrição: dc.descriptionDepartment of Medical Clinic Botucatu Medical School São Paulo State University (UNESP)-
Descrição: dc.descriptionDepartment of Physical Education School of Sciences São Paulo State University (UNESP)-
Descrição: dc.descriptionJoint Graduate Program in Physiological Sciences PIPGCF UFSCar/UNESP-
Descrição: dc.descriptionDepartment of Biology School of Sciences São Paulo State University (UNESP)-
Descrição: dc.descriptionDepartment of Medical Clinic Botucatu Medical School São Paulo State University (UNESP)-
Descrição: dc.descriptionDepartment of Physical Education School of Sciences São Paulo State University (UNESP)-
Idioma: dc.languageen-
Relação: dc.relationJournal of Applied Toxicology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectcardiac hypertrophy-
Palavras-chave: dc.subjectcollagen-
Palavras-chave: dc.subjectglucocorticoids-
Palavras-chave: dc.subjectheart rate variability-
Palavras-chave: dc.subjecthypertension-
Palavras-chave: dc.subjectvessel remodeling-
Título: dc.titleDifferential effects of dexamethasone on arterial stiffness, myocardial remodeling and blood pressure between normotensive and spontaneously hypertensive rats-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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