Negative regulation of tumor suppressor p53 by microRNA miR-504.
Negative regulation of tumor suppressor p53 by microRNA miR-504.
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DOI:
10.1016/j.molcel.2010.05.027
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发表时间:
2010-06-11
期刊:
影响因子:
16
通讯作者:
Feng Z
中科院分区:
文献类型:
--
作者:
Hu W;Chan CS;Wu R;Zhang C;Sun Y;Song JS;Tang LH;Levine AJ;Feng Z
Tumor suppressor p53 plays a central role in tumor prevention. p53 protein levels and activity are under a tight and complex regulation in cells to maintain the proper function of p53. microRNAs play a key role in the regulation of gene expression. Here we report the regulation of p53 through microRNA miR-504. miR-504 acts as a negative regulator of human p53 through its direct binding to two sites in p53 3′-UTR. Overexpression of miR-504 decreases p53 protein levels and functions in cells, including p53 transcriptional activity, p53-mediated apoptosis and cell cycle arrest in response to stress, and furthermore, promotes tumorigenecity of cells in vivo. These results demonstrate the direct negative regulation of p53 by miR-504 as a mechanism for p53 regulation in cells, which highlights the importance of microRNAs in tumorigenesis.
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