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Updated: Nov 5, 2025

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
06:09

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Cul4b Promotes Progression of Malignant Cutaneous Melanoma Patients by Regulating CDKN2A

Chao Zhang1, Can Cao1, Xiu-Li Liu2

  • 1Department of Dermatology, The Second Affiliated Hospital of Shandong First Medical University.

The Tohoku Journal of Experimental Medicine
|May 20, 2021
PubMed

Insights

High Cul4b expression correlates with poor prognosis in cutaneous melanoma patients. Reducing Cul4b inhibits melanoma cell proliferation, suggesting Cul4b as a potential therapeutic target for this skin cancer.

Area of Science:

  • Oncology
  • Dermatology
  • Molecular Biology

Background:

  • Cutaneous melanoma prognosis remains challenging despite advances in targeted therapy and immunotherapy.
  • Cul4b is implicated in the progression of various cancers by influencing cell proliferation.
  • The prognostic significance of Cul4b in malignant cutaneous melanoma is currently unevaluated.

Purpose of the Study:

  • To investigate the expression of Cul4b in cutaneous melanoma.
  • To determine the prognostic value of Cul4b in cutaneous melanoma patients.
  • To elucidate the role of Cul4b in melanoma cell proliferation.

Main Methods:

  • Immunohistochemistry was utilized to assess Cul4b expression in a patient cohort.
  • Univariate and multivariate analyses were performed to evaluate prognostic significance.
  • Cul4b was downregulated in a melanoma cell line to assess its functional role.

Main Results:

  • Cul4b was found to be highly expressed in a subset of cutaneous malignant melanoma.
  • High Cul4b expression significantly correlated with poorer melanoma-specific overall survival and disease-free survival.
  • Cul4b expression levels were associated with established prognostic factors including Breslow category, Clark level, and Ki67 expression.

Conclusions:

  • Cul4b serves as an independent prognostic risk factor for cutaneous melanoma.
  • Downregulation of Cul4b suppressed melanoma cell proliferation and reduced CDKN2A expression.
  • Cul4b plays a critical role in cutaneous melanoma progression and represents a potential therapeutic target.
Keywords:
CDKN2ACul4bcutaneous melanomaproliferation

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