Book contents
- Frontmatter
- Contents
- List of contributors
- Foreword by Sidney Altman
- Foreword by Victor R. Ambros
- Introduction
- I Discovery of microRNAs in various organisms
- II MicroRNA functions and RNAi-mediated pathways
- III Computational biology of microRNAs
- IV Detection and quantitation of microRNAs
- V MicroRNAs in disease biology
- VI MicroRNAs in stem cell development
- 33 MicroRNAs in the stem cells of the mouse blastocyst
- 34 The role of miRNA in hematopoiesis
- 35 MicroRNAs in embryonic stem cell differentiation and prediction of their targets
- 36 Generation of single cell microRNA expression profile
- 37 Piwi-interacting RNAs (piRNAs)
- 38 MicroRNAs in immunology, cardiology, diabetes, and unicellular organisms
- Index
- Plate section
- References
34 - The role of miRNA in hematopoiesis
from VI - MicroRNAs in stem cell development
Published online by Cambridge University Press: 22 August 2009
- Frontmatter
- Contents
- List of contributors
- Foreword by Sidney Altman
- Foreword by Victor R. Ambros
- Introduction
- I Discovery of microRNAs in various organisms
- II MicroRNA functions and RNAi-mediated pathways
- III Computational biology of microRNAs
- IV Detection and quantitation of microRNAs
- V MicroRNAs in disease biology
- VI MicroRNAs in stem cell development
- 33 MicroRNAs in the stem cells of the mouse blastocyst
- 34 The role of miRNA in hematopoiesis
- 35 MicroRNAs in embryonic stem cell differentiation and prediction of their targets
- 36 Generation of single cell microRNA expression profile
- 37 Piwi-interacting RNAs (piRNAs)
- 38 MicroRNAs in immunology, cardiology, diabetes, and unicellular organisms
- Index
- Plate section
- References
Summary
Introduction
RNA interference (RNAi) represents a highly conserved cellular mechanism to specifically regulate eukaryotic gene expression either by inducing sequence- specific degradation of complementary mRNA or by inhibiting its translation (reviewed in Hannon, 2002; Hutvagner & Zamore, 2002). RNAi is triggered by two classes of small RNAs: one class, called siRNA (small interfering RNA), can be derived from longer double-stranded RNAs that are transcribed from different kinds of vector or introduced directly into cells by transfection, whereas the second class, miRNA (microRNA), is processed from stem-loop precursors that are encoded within the host genome (Elbashir et al., 2001; Ambros et al., 2003).
Non-coding miRNAs negatively regulate the expression of genes at the post-transcriptional level through the RNAi pathway (Bartel, 2004). The first miRNA, lin-4, was discovered in 1993 by Ambros and colleagues (Lee et al., 1993) in a study of developmental timing in the nematode worm C. elegans and soon led to the identification of the first miRNA target lin-14 (Wightman et al., 1993). The second miRNA discovered, let-7, is involved in regulation of intracellular signal transduction and has recently been shown to inhibit expression of let-60, the nematode RAS homolog (Johnson et al., 2005). Hundreds of miRNAs have been identified in flies, worms, plants, fish, and mammals by cloning of size-fractionated RNAs or bioinformatic prediction strategies (Lagos-Quintana et al., 2001; Llave et al., 2002; Lim et al., 2003a, 2003b; Watanabe et al., 2005).
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- Chapter
- Information
- MicroRNAsFrom Basic Science to Disease Biology, pp. 467 - 475Publisher: Cambridge University PressPrint publication year: 2007