Journal
MOLECULAR CELL
Volume 36, Issue 2, Pages 340-347Publisher
CELL PRESS
DOI: 10.1016/j.molcel.2009.08.017
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology
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Steroid hormones and their cognate nuclear receptors exert a wide spectrum of biological actions through regulation of transcriptional and posttranscriptional processes. However, the underlying molecular mechanism by which steroid hormones control posttranscriptional processes is largely unknown. We now report that estrogen receptor alpha (ER alpha) inhibits the maturation of a particular microRNA (miRNA) and thereby stabilizes the mRNA of an ER alpha target gene through the 3'UTR. Estrogen-bound ER alpha downregulated expression of a set of miRNAs in both animals and cultured cells. Activated ER alpha attenuated the processing of primary miRNAs into pre-miRNAs through estrogen-dependent association with the Drosha complex, resulting in stabilization of the transcript of an ER alpha target gene through its 3'UTR. Thus, a steroid hormone achieves posttranscriptional control by regulating the maturation of miRNA.
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