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ZFIN ID: ZDB-PUB-110207-26
CTCF Promotes Muscle Differentiation by Modulating the Activity of Myogenic Regulatory Factors
Delgado-Olguin, P., Brand-Arzamendi, K., Scott, I.C., Jungblut, B., Stainier, D.Y., Bruneau, B.G., and Recillas-Targa, F.
Date: 2011
Source: The Journal of biological chemistry   286(14): 12483-94 (Journal)
Registered Authors: Jungblut, Benno, Scott, Ian, Stainier, Didier
Keywords: Cell differentiation, Gene expression, Gene regulation, Skeletal muscle, Transcription regulation, CTCF, MyoD
MeSH Terms:
  • Animals
  • Cell Differentiation/genetics
  • Cell Differentiation/physiology
  • Cell Line
  • Chromatin Immunoprecipitation
  • Embryo, Mammalian/metabolism
  • Embryo, Nonmammalian/metabolism
  • Immunoprecipitation
  • In Situ Hybridization
  • Mice
  • Muscle Development/genetics
  • Muscle Development/physiology*
  • MyoD Protein/genetics
  • MyoD Protein/metabolism
  • Myogenic Regulatory Factors/genetics
  • Myogenic Regulatory Factors/metabolism*
  • Myogenin/genetics
  • Myogenin/metabolism
  • Protein Binding/genetics
  • Protein Binding/physiology
  • RNA, Small Interfering
  • Repressor Proteins/genetics
  • Repressor Proteins/metabolism*
  • Reverse Transcriptase Polymerase Chain Reaction
  • Somites/metabolism
  • Wnt Proteins/genetics
  • Wnt Proteins/metabolism
  • Zebrafish
  • Zebrafish Proteins/genetics
  • Zebrafish Proteins/metabolism
PubMed: 21288905 Full text @ J. Biol. Chem.
CTCF nuclear factor regulates many aspects of gene expression, largely as a transcriptional repressor or via insulator function. Its roles in cellular differentiation are not clear. Here we show an unexpected role for CTCF in myogenesis. Ctcf is expressed in myogenic structures during mouse and zebrafish development. Gain and loss-of-function approaches in C2C12 cells revealed CTCF as a modulator of myogenesis by regulating muscle-specific gene expression. We addressed the functional connection between CTCF and myogenic regulatory factors (MRFs). CTCF enhances the myogenic potential of MyoD and Myogenin and establishes direct interactions with MyoD, indicating that CTCF regulates MRF-mediated muscle differentiation. Indeed, CTCF modulates functional interactions between MyoD and Myogenin in co-activation of muscle-specific gene expression, and facilitates MyoD recruitment to a muscle-specific promoter. Finally, ctcf loss-of-function experiments in zebrafish embryos revealed a critical role of CTCF in myogenic development and link CTCF to broader aspects of development via regulation of Wnt signaling. We conclude that CTCF modulates MRF functional interactions in the orchestration of myogenesis.