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The Negative Regulator CXXC5: Making WNT Look a Little Less Dishevelled

Dongwon Kim1, Luis A Garza1

  • 1Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.

The Journal of Investigative Dermatology
|October 3, 2017
PubMed

Insights

Wingless-related integration site (WNT)/β-catenin signaling is crucial for tissue regeneration. Researchers identified CXXC-type zinc finger protein 5 (CXXC5) as a key inhibitor of this pathway in hair follicle regeneration.

Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Regenerative Medicine

Background:

  • Wingless-related integration site (WNT)/β-catenin signaling is a fundamental pathway regulating cell growth, differentiation, and tissue regeneration.
  • Dysregulation of WNT signaling is implicated in various developmental disorders and diseases, highlighting the need for understanding its regulatory mechanisms.
  • Identifying negative regulators of WNT signaling is crucial for therapeutic interventions in regenerative processes, such as hair follicle regeneration.

Purpose of the Study:

  • To investigate the role of CXXC-type zinc finger protein 5 (CXXC5) as a negative regulator of WNT/β-catenin signaling.
  • To elucidate the interaction between CXXC5 and Dishevelled (DVL) in the context of hair follicle regeneration.
  • To understand the molecular mechanisms by which CXXC5 modulates WNT signaling during hair follicle development and regeneration.

Main Methods:

  • Molecular cloning and protein expression of CXXC5 and DVL.
  • Co-immunoprecipitation assays to confirm the interaction between CXXC5 and DVL.
  • Western blotting to analyze WNT/β-catenin signaling pathway components.
  • Hair follicle regeneration assays in vivo and in vitro.

Main Results:

  • CXXC5 directly interacts with Dishevelled (DVL).
  • This interaction inhibits WNT/β-catenin signaling.
  • CXXC5 acts as a negative regulator of hair follicle regeneration by suppressing WNT signaling.

Conclusions:

  • CXXC5 is a novel negative regulator of WNT/β-catenin signaling.
  • The interaction between CXXC5 and DVL is critical for controlling WNT pathway activity in hair follicle regeneration.
  • Targeting the CXXC5-DVL interaction may offer a therapeutic strategy for enhancing hair follicle regeneration.

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