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Regulating the Regulators: Mechanisms Controlling the Maturation of MicroRNAs

Overview
Specialty Biochemistry
Date 2008 Nov 18
PMID 19012978
Citations 39
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Abstract

MicroRNAs (miRNAs) are small noncoding RNAs that control diverse cellular and developmental events through repression of large sets of target mRNAs. Regulated transcription of the genes encoding miRNAs by RNA polymerase II promotes specific expression patterns of individual miRNAs. However, recent studies have established that substantial regulation of mature miRNA accumulation also occurs after transcription. Here, we review the mechanisms of such post-transcriptional regulation, with a particular focus on examples where molecular mechanisms or physiological principles are beginning to emerge. Elucidating these mechanisms will increase our understanding of gene regulation and provide new insights into causes of miRNA misexpression in diseases such as cancer.

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