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Trends Biochem Sci. 2008 Oct;33(10):474-81. doi: 10.1016/j.tibs.2008.06.008. Epub 2008 Sep 5.

Circular reasoning: microRNAs and cell-cycle control.

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  • 1McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.


MicroRNAs (miRNAs) have attracted considerable attention because of their important roles in development, normal physiology, and disease states including cancer. Recent studies have identified specific miRNAs that regulate the cell cycle and have documented that the loss or gain of miRNA-mediated cell-cycle control contributes to malignancy. miRNAs regulate classic cell-cycle control pathways by directly targeting proteins such as E2F transcription factors, cyclin-dependent kinases (Cdks), cyclins and Cdk inhibitors. Moreover, from recent findings, it has been suggested that miRNAs themselves might be subject to cell-cycle dependent regulation. Together, these observations indicate that the reciprocal control of RNA silencing and the metazoan cell cycle impacts cellular behavior and disease.

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