Effects of chronic anabolic steroid treatment on tonic and reflex cardiovascular control in male rats

Effects of chronic anabolic steroid treatment on tonic and reflex cardiovascular control in male rats

Autor Beutel, A. Google Scholar
Bergamaschi, C. T. Google Scholar
Campos, R. R. Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Resumo The aim of this study was to analyze the cardiovascular effects of chronic stanozolol administration in male rats. the rats were randomly assigned to one of three groups: (1) control (n=12), (2) chronic treatment with low dose of stanozolol (LD, n = 18, 5 mg/kg week) and; (3) treatment with high dose of stanozolol (HD, n = 28, 20 mg/kg week). Mean arterial pressure (MAP) was higher in both HD (128 +/- 2.2 mmHg) and LD (126 +/- 2.5 mmHg) than control (116 2 mmHg). the LD group showed an increase in cardiac output (control 121 +/- 2.5, LD 154 +/- 5.9 ml/min), whereas in the HD group total peripheral resistance increased (control 1.03 +/- 0.07, HD 1.26 +/- 0.07 mmHg/ml/min). Acute sympathetic blockade caused a similar decrease in MAP in all groups. in conscious rats, the baroreflex index for bradyeardia (control -3.7 +/- 0.4, LD -2.0 +/- 0.1 beat/mmHg) and tachycardia (control -3.6 +/- 0.3, LD -4.7 +/- 0.2 beat/mmHg) responses changed only in the LD group. Cardiac hypertrophy was observed in both treated groups (P < 0.05). in conclusion, hypertension with differential hemodynamic changes and alterations in the reflex control in heart rate is seen at different stanozolol doses, which may be important variables in the cardiovascular effects of anabolic steroids. (c) 2004 Elsevier B.V. All rights reserved.
Palavra-chave baroreflex
blood pressure
cardiac output
Idioma Inglês
Data de publicação 2005-01-01
Publicado em Journal of Steroid Biochemistry and Molecular Biology. Oxford: Pergamon-Elsevier B.V., v. 93, n. 1, p. 43-48, 2005.
ISSN 0960-0760 (Sherpa/Romeo, fator de impacto)
Publicador Elsevier B.V.
Extensão 43-48
Fonte http://dx.doi.org/10.1016/j.jsbmb.2004.11.003
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000227933000005
Endereço permanente http://repositorio.unifesp.br/handle/11600/28083

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