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Resveratrol and prostate cancer: Promising role for microRNAs

✍ Scribed by Swati Dhar; Chindo Hicks; Anait S. Levenson

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
440 KB
Volume
55
Category
Article
ISSN
1613-4125

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Scope: Resveratrol (Res) has anticancer activity in prostate cancer (PCa), which can be attributed to modulation of microRNAs (miRNAs/miRs). miRNAs/miRs are small non‐coding RNAs that negatively regulate gene expression. We have analyzed differential miRNA expression in PCa cells treated with Res.

Methods and results: Using miRNA microarrays we found that 23 miRNAs were significantly down‐regulated and 28 miRNAs were significantly up‐regulated after Res treatment. The down‐regulated miRs included miR‐17‐92 and miR‐106ab clusters with well recognized oncogenic properties while the up‐regulated miRs included several tumor suppressors. Selected miRs were verified by qRT‐PCR, including miR‐17, miR‐20a, miR‐20b, miR‐106a and miR106b. Since these miRNAs target PTEN (phosphatase and tensin homolog deleted on chromosome 10), we performed Western blot to confirm up‐regulation of PTEN in PCa cells. In addition, using TargetScan database, we have identified putative mRNA targets for Res‐induced down‐ and up‐regulated miRs. Using a bioinformatics approach, we generated gene networks specifically altered by Res‐regulated miRNAs.

Conclusion: Our results indicate that the dietary compound Res may play an important role in prostate carcinogenesis through modulation of miRNA expression: Res down‐regulated oncogenic miRs and up‐regulated tumor suppressor miRs in PCa cells. Further in‐depth studies are necessary in order to fully recognize the beneficial miRNA‐mediated effects of Res in PCa.

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