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Type: Artigo de periódico
Title: Decreased Expression Of Stem Cell Markers By Simvastatin In 7,12-dimethylbenz(a)anthracene (dmba)-induced Breast Cancer.
Author: Rennó, André Lisboa
Alves-Júnior, Marcos José
Rocha, Rafael Malagoli
De Souza, Philipi Coutinho
de Souza, Valéria Barbosa
Jampietro, Juliano
Vassallo, José
Hyslop, Stephen
Anhê, Gabriel Forato
de Moraes Schenka, Natália Guimarães
Soares, Fernando Augusto
Schenka, André Almeida
Abstract: Simvastatin, a competitive inhibitor of HMG-CoA reductase widely used in the treatment and prevention of hyperlipidemia-related diseases, has recently been associated to in vitro anticancer stem cell (CSC) actions. However, these effects have not been confirmed in vivo. To assess in vivo anti-CSC effects of simvastatin, female Sprague-Dawley rats with 7,12-dimethyl-benz(a)anthracene (DMBA)-induced mammary cancer and control animals were treated for 14 days with either simvastatin (20 or 40 mg/kg/day) or soybean oil (N = 60). Tumors and normal breast tissues were removed for pathologic examination and immunodetection of CSC markers. At 40 mg/kg/day, simvastatin significantly reduced tumor growth and the expression of most CSC markers. The reduction in tumor growth (80%) could not be explained solely by the decrease in CSCs, since the latter accounted for less than 10% of the neoplasia (differentiated cancer cells were also affected). Stem cells in normal, nonneoplastic breast tissues were not affected by simvastatin. Simvastatin was also associated with a significant decrease in proliferative activity but no increase in cell death. In conclusion, this is the first study to confirm simvastatin anti-CSC actions in vivo, further demonstrating that this effect is specific for neoplastic cells, but not restricted to CSCs, and most likely due to inhibition of cell proliferation.
Subject: Cd133
Cancer Stem Cells
Citation: Toxicologic Pathology. , 2014-Oct.
Rights: fechado
Identifier DOI: 10.1177/0192623314544707
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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