ZFIN ID: ZDB-PUB-050818-12
TAZ, a transcriptional modulator of mesenchymal stem cell differentiation
Hong, J.H., Hwang, E.S., McManus, M.T., Amsterdam, A., Tian, Y., Kalmukova, R., Mueller, E., Benjamin, T., Spiegelman, B.M., Sharp, P.A., Hopkins, N., and Yaffe, M.B.
Date: 2005
Source: Science (New York, N.Y.)   309(5737): 1074-1078 (Journal)
Registered Authors: Amsterdam, Adam, Hopkins, Nancy
Keywords: none
MeSH Terms:
  • Adipocytes/cytology*
  • Animals
  • Bone Morphogenetic Protein 2
  • Bone Morphogenetic Proteins/pharmacology
  • Cell Differentiation
  • Cell Line
  • Core Binding Factor Alpha 1 Subunit
  • Gene Expression Regulation, Developmental
  • Humans
  • Mesenchymal Stem Cells/cytology*
  • Mesenchymal Stem Cells/physiology
  • Mice
  • Neoplasm Proteins/metabolism
  • Oligonucleotides, Antisense
  • Osteoblasts/cytology*
  • Osteocalcin/genetics
  • Osteogenesis
  • PPAR gamma/metabolism
  • Promoter Regions, Genetic
  • Protein Structure, Tertiary
  • Proteins/chemistry
  • Proteins/genetics
  • Proteins/physiology*
  • RNA, Small Interfering
  • Transcription Factors/chemistry
  • Transcription Factors/genetics
  • Transcription Factors/metabolism
  • Transcription Factors/physiology*
  • Transcriptional Activation
  • Transfection
  • Transforming Growth Factor beta/pharmacology
  • Zebrafish
  • Zebrafish Proteins/genetics
  • Zebrafish Proteins/physiology
PubMed: 16099986 Full text @ Science
ABSTRACT
Mesenchymal stem cells (MSCs) are a pluripotent cell type that can differentiate into several distinct lineages. Two key transcription factors, Runx2 and peroxisome proliferator-activated receptor gamma (PPARgamma), drive MSCs to differentiate into either osteoblasts or adipocytes, respectively. How these two transcription factors are regulated in order to specify these alternate cell fates remains a pivotal question. Here we report that a 14-3-3-binding protein, TAZ (transcriptional coactivator with PDZ-binding motif), coactivates Runx2-dependent gene transcription while repressing PPARgamma-dependent gene transcription. By modulating TAZ expression in model cell lines, mouse embryonic fibroblasts, and primary MSCs in culture and in zebrafish in vivo, we observed alterations in osteogenic versus adipogenic potential. These results indicate that TAZ functions as a molecular rheostat that modulates MSC differentiation.
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