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Updated: Feb 10, 2026

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RIPK4 function interferes with melanoma cell adhesion and metastasis.

Norbert Wronski1,2, Sławomir Lasota3, Ewelina Madej1

  • 1Department of Biophysics and Cancer Biology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland.

Molecular Oncology
|February 9, 2026
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Summary

Receptor-interacting protein kinase 4 (RIPK4) drives melanoma metastasis. Loss of RIPK4 significantly reduces pulmonary metastasis by reprogramming melanoma cell adhesion and motility, establishing RIPK4 as a key regulator in melanoma progression.

Keywords:
RIPK4amoeboid migrationlung metastasismelanomareprogramming

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Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Receptor-interacting protein kinase 4 (RIPK4) is implicated in various cancers.
  • RIPK4 acts as a tumor suppressor in nonmelanoma skin cancer but as an oncogene in melanoma.
  • Elevated RIPK4 levels in metastatic melanoma suggest a role in disease progression.

Purpose of the Study:

  • To investigate the role of RIPK4 in melanoma cell invasion and metastasis.
  • To understand the molecular mechanisms by which RIPK4 influences melanoma cell phenotype.
  • To assess the therapeutic potential of targeting RIPK4 in melanoma.

Main Methods:

  • Integrated analysis of clinical samples and in vivo xenograft models.
  • Transcriptomic analysis using next-generation sequencing.
  • Functional validation using 3D spheroid and collagen-based invasion assays.

Main Results:

  • RIPK4 deletion significantly reduced pulmonary metastasis formation in vivo.
  • RIPK4 loss led to transcriptional reprogramming of adhesion- and motility-related genes.
  • RIPK4 knockout cells showed impaired motility and invasion, despite some amoeboid phenotype features.
  • Re-expression of RIPK4 restored mesenchymal morphology and migratory capacity.

Conclusions:

  • RIPK4 is a critical regulator of melanoma invasion and metastasis.
  • RIPK4 influences late-stage metastatic events, including extravasation and colonization.
  • Loss of RIPK4 function induces compensatory cellular changes that do not fully restore invasive potential.