miRNA goes nuclear

RNA Biol. 2012 Mar;9(3):269-73. doi: 10.4161/rna.19354. Epub 2012 Mar 1.

Abstract

microRNAs (miRNAs), defined as 21-24 nucleotide non-coding RNAs, are important regulators of gene expression. Initially, the functions of miRNAs were recognized as post-transcriptional regulators on mRNAs that result in mRNA degradation and/or translational repression. It is becoming evident that miRNAs are not only restricted to function in the cytoplasm, they can also regulate gene expression in other cellular compartments by a spectrum of targeting mechanisms via coding regions, 5' and 3'untransalated regions (UTRs), promoters, and gene termini. In this point-of-view, we will specifically focus on the nuclear functions of miRNAs and discuss examples of miRNA-directed transcriptional gene regulation identified in recent years.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Review

MeSH terms

  • Active Transport, Cell Nucleus*
  • Animals
  • Argonaute Proteins / metabolism
  • Cell Nucleus / metabolism*
  • Cyclin B1 / genetics
  • Gene Expression Regulation
  • Humans
  • MicroRNAs / metabolism*
  • Promoter Regions, Genetic

Substances

  • Argonaute Proteins
  • Cyclin B1
  • MicroRNAs