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microRNAs join the p53 network — another piece in the tumour-suppression puzzle


Several recent studies have found a conserved microRNA (miRNA) family, the miR-34s, to be direct transcriptional targets of p53. miR-34 activation can recapitulate elements of p53 activity, including induction of cell-cycle arrest and promotion of apoptosis, and loss of miR-34 can impair p53-mediated cell death. These data reinforce the growing awareness that non-coding RNAs are key players in tumour development by placing miRNAs in a central role in a well-known tumour-suppressor network.

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Figure 1: Current model of miRNA biogenesis and post-transcriptional silencing.
Figure 2: A model of the p53–miR-34 network in regulating cell proliferation and cell death.


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I.H. is supported by a K99 grant from the US National Institutes of Health (NIH). X.H. is supported by a predoctoral fellowship from the DOB Breast Cancer Research Program. This work was supported in part by grants from the NIH (S.W.L. and G.J.H.) and a kind gift from Kathryn W. Davis (G.J.H.).

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Correspondence to Gregory J. Hannon.

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He, L., He, X., Lowe, S. et al. microRNAs join the p53 network — another piece in the tumour-suppression puzzle. Nat Rev Cancer 7, 819–822 (2007).

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