Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/5244
Title: Anabolic steroid- and exercise-induced cardiac stress protein (HSP72) in the rat.
Authors: Lunz, Wellington
Oliveira, Emerson Cruz de
Neves, Marco Túlio David das
Fontes, Elizabeth Pacheco Batista
Dias, Cristina Maria Ganns Chaves
Natali, Antônio José
Keywords: Physical activity
Nandrolone
Myocardium
Heat shock protein
Issue Date: 2006
Citation: LUNZ, W. et al. Anabolic steroid- and exercise-induced cardiac stress protein (HSP72) in the rat. Brazilian Journal of Medical and Biological Research, Ribeirão Preto - SP, v. 39, n.7, p. 889-893, 2006. Disponível em:< http://www.scielo.br/scielo.php?pid=S0100-879X2006000700006&script=sci_arttext> . Acesso em: 16 mar. 2015.
Abstract: The present study investigated the effects of exercise and anabolicandrogenic steroids on cardiac HSP72 expression. Male Wistar rats were divided into experimental groups: nandrolone exercise (NE, N = 6), control exercise (CE, N = 6), nandrolone sedentary (NS, N = 6), and control sedentary (CS, N = 6). Animals in the NE and NS groups received a weekly intramuscular injection (6.5 mg/kg of body weight) of nandrolone decanoate, while those in the CS and CE groups received mineral oil as vehicle. Animals in the NE and CE groups were submitted to a progressive running program on a treadmill, for 8 weeks. Fragments of the left ventricle were collected at sacrifice and the relative immunoblot contents of HSP72 were determined. Heart weight to body weight ratio was higher in exercised than in sedentary animals (P < 0.05, 4.65 ± 0.38 vs 4.20 ± 0.47 mg/g, respectively), independently of nandrolone, and in nandrolone-treated than untreated animals (P < 0.05, 4.68 ± 0.47 vs 4.18 ± 0.32 mg/g, respectively), independently of exercise. Cardiac HSP72 accumulation was higher in exercised than in sedentary animals (P < 0.05, 677.16 ± 129.14 vs 246.24 ± 46.30 relative unit, respectively), independently of nandrolone, but not different between nandrolone-treated and untreated animals (P > 0.05, 560.88 ± 127.53 vs 362.52 ± 95.97 relative unit, respectively) independently of exercise. Exercise-induced HSP72 expression was not affected by nandrolone. These levels of HSP72 expression in response to nandrolone administration suggest either a low intracellular stress or a possible less protection to the myocardium.
URI: http://www.repositorio.ufop.br/handle/123456789/5244
ISSN: 1414431X
metadata.dc.rights.license: No permission is required from the authors or the publishers download, reuse, reprint, modify, distribute, and/or copy articles published in the BJMBR, as long as the original authors and source are cited. Fonte: Brazilian Journal of Medical and Biological Research <http://www.bjournal.com.br/index.php?option=com_content&view=article&id=185&Itemid=139>. Acesso em: 21 jan. 2014.
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