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4 - MicroRNAs in limb development

from I - Discovery of microRNAs in various organisms

Published online by Cambridge University Press:  22 August 2009

Danielle M. Maatouk
Affiliation:
Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA
Jason R. Rock
Affiliation:
Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA
Brian D. Harfe
Affiliation:
Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA
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Summary

Introduction

The vertebrate limb is a highly organized structure that must be patterned along three axes during development: anteroposterior, dorsoventral, and proximodistal (Tickle, 2003). For decades, the limb has served as a choice model system for developmental biologists because of the ease with which it can be manipulated and an organism's ability to survive with abnormal or absent limbs. Despite years of intense investigation, many of the molecules responsible for limb pattern formation are still not known.

Recently, a class of non-coding RNAs, the microRNAs (miRNAs), have been implicated in limb development. These molecules are ~22 nt in their mature form and can bind to mRNAs, leading to their degradation or inhibition of protein production (McManus and Sharp, 2002). The first miRNA to be discovered, lin-4, was identified in a forward genetic screen aimed at identifying developmental timing defects in C. elegans (Lee et al., 1993). Nearly a decade after the discovery of lin-4 in nematodes, a second miRNA, let-7, was identified in organisms ranging from C. elegans to humans (Pasquinelli et al., 2000; Reinhart et al., 2000). In the years since, at least 326 miRNAs have been validated in humans and 249 in mouse (Griffiths-Jones, 2004). Only a few of these miRNAs have known functions (reviewed in Harfe (2005)). Our lab is interested in the role miRNAs play in patterning the vertebrate limb.

MicroRNA processing

Mature miRNAs are produced through two cleavage events by members of the RNaseIII family of nucleases (Bernstein et al., 2001; Hutvagner et al., 2001; Ketting et al., 2001; Lee et al. 2003).

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  • MicroRNAs in limb development
    • By Danielle M. Maatouk, Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA, Jason R. Rock, Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA, Brian D. Harfe, Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA
  • Edited by Krishnarao Appasani
  • Foreword by Sidney Altman, Victor R. Ambros
  • Book: MicroRNAs
  • Online publication: 22 August 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511541766.007
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  • MicroRNAs in limb development
    • By Danielle M. Maatouk, Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA, Jason R. Rock, Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA, Brian D. Harfe, Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA
  • Edited by Krishnarao Appasani
  • Foreword by Sidney Altman, Victor R. Ambros
  • Book: MicroRNAs
  • Online publication: 22 August 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511541766.007
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • MicroRNAs in limb development
    • By Danielle M. Maatouk, Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA, Jason R. Rock, Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA, Brian D. Harfe, Department of Molecular Genetics & Microbiology, University of Florida College of Medicine 1600 SW Archer Road Gainesville, FL 32610-0266 USA
  • Edited by Krishnarao Appasani
  • Foreword by Sidney Altman, Victor R. Ambros
  • Book: MicroRNAs
  • Online publication: 22 August 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511541766.007
Available formats
×