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Abstract Title:

Sulforaphane Inhibits c-Myc-Mediated Prostate Cancer Stem-Like Traits.

Abstract Source:

J Cell Biochem. 2016 Mar 15. Epub 2016 Mar 15. PMID: 26990292

Abstract Author(s):

Avani R Vyas, Michelle B Moura, Eun-Ryeong Hahm, Krishna Beer Singh, Shivendra V Singh

Article Affiliation:

Avani R Vyas

Abstract:

Preventive and therapeutic efficiencies of dietary sulforaphane (SFN) against human prostate cancer have been demonstrated in vivo, but the underlying mechanism(s) by which this occurs is poorly understood. Here, we show that the prostate cancer stem cell (pCSC)-like traits, such as accelerated activity of aldehyde dehydrogenase 1 (ALDH1), enrichment of CD49f+ fraction, and sphere forming efficiency, are attenuated by SFN treatment. Interestingly, the expression of c-Myc, an oncogenic transcription factor that is frequently deregulated in prostate cancer cells, was markedly suppressed by SFN both in vitro and in vivo. This is biologically relevant, because the lessening of pCSC-like phenotypes mediated by SFN was attenuated when c-Myc was overexpressed. Naturally-occurring thio, sulfinyl, and sulfonyl analogs of SFN were also effective in causing suppression of c-Myc protein level. However, basal glycolysis, a basic metabolic pathway that can also be promoted by c-Myc overexpression, was not largely suppressed by SFN, implying that, in addition to c-Myc, there might be another SFN-sensitive cellular factor, which is not directly involved in basal glycolysis, but cooperates with c-Myc to sustain pCSC-like phenotypes. Our study suggests that oncogenic c-Myc is a target of SFN to prevent and eliminate the onset of human prostate cancer. This article is protected by copyright. All rights reserved.

Study Type : Animal Study, In Vitro Study

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