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CCN2/CTGF binds to fibroblast growth factor receptor 2 and modulates its signaling

Eriko Aoyama1, Satoshi Kubota, Masaharu Takigawa

  • 1Biodental Research Center, Dental School, Okayama University, Okayama, Japan.

FEBS Letters
|November 13, 2012
PubMed

Insights

Cellular communication protein CCN2 binds to fibroblast growth factor receptors (FGFRs), particularly FGFR2, influencing bone cell development and signaling pathways crucial for bone metabolism.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Skeletal Biology

Background:

  • Connective tissue growth factor (CCN2) is vital for mesenchymal tissue development, including cartilage and bone.
  • CCN2 signaling is regulated by its interactions with cytokines and cellular receptors.

Purpose of the Study:

  • To investigate the binding interaction between CCN2 and fibroblast growth factor receptors (FGFRs).
  • To elucidate the functional consequences of CCN2-FGFR binding on bone cell biology and signaling.

Main Methods:

  • Protein array screening to identify CCN2-binding partners.
  • Co-immunoprecipitation assays to confirm CCN2-FGFR2 binding.
  • Analysis of ERK phosphorylation and osteoblastic cell differentiation.

Main Results:

  • CCN2 demonstrated binding affinity for FGFR2 and FGFR3, with a preference for FGFR2.
  • CCN2 enhanced the binding of FGF2 and FGF4 to FGFR2.
  • CCN2 and FGF2 synergistically promoted ERK phosphorylation and osteoblastic cell differentiation.

Conclusions:

  • CCN2 directly binds to FGFR2, modulating its interaction with FGFs.
  • The CCN2-FGFR2 interaction plays a significant role in regulating osteoblastic cell differentiation and bone metabolism.

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