1. Academic Validation
  2. RNF43 inhibits WNT5A-driven signaling and suppresses melanoma invasion and resistance to the targeted therapy

RNF43 inhibits WNT5A-driven signaling and suppresses melanoma invasion and resistance to the targeted therapy

  • Elife. 2021 Oct 27;10:e65759. doi: 10.7554/eLife.65759.
Tomasz Radaszkiewicz 1 Michaela Nosková 1 Kristína Gömöryová 1 Olga Vondálová Blanářová 1 Katarzyna Anna Radaszkiewicz 1 Markéta Picková 1 2 3 Ráchel Víchová 2 Tomáš Gybeľ 1 Karol Kaiser 1 Lucia Demková 4 Lucia Kučerová 4 Tomáš Bárta 1 5 David Potěšil 6 Zbyněk Zdráhal 6 Karel Souček 1 2 3 Vítězslav Bryja 1 2
Affiliations

Affiliations

  • 1 Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
  • 2 Department of Cytokinetics, Institute of Biophysics CAS, Brno, Czech Republic.
  • 3 International Clinical Research Center FNUSA-ICRC, Brno, Czech Republic.
  • 4 Laboratory of Molecular Oncology, Cancer Research Institute, Biomedical Research Center of the Slovak Academy of Sciences, Bratislava, Slovakia.
  • 5 Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
  • 6 Central European Institute of Technology, Masaryk University, Brno, Czech Republic.
Abstract

RNF43 is an E3 ubiquitin Ligase and known negative regulator of Wnt/β-catenin signaling. We demonstrate that RNF43 is also a regulator of noncanonical WNT5A-induced signaling in human cells. Analysis of the RNF43 interactome using BioID and immunoprecipitation showed that RNF43 can interact with the core receptor complex components dedicated to the noncanonical Wnt pathway such as ROR1, ROR2, VANGL1, and VANGL2. RNF43 triggers VANGL2 ubiquitination and proteasomal degradation and clathrin-dependent internalization of ROR1 receptor and inhibits ROR2 activation. These activities of RNF43 are physiologically relevant and block pro-metastatic WNT5A signaling in melanoma. RNF43 inhibits responses to WNT5A, which results in the suppression of invasive properties of melanoma cells. Furthermore, RNF43 prevented WNT5A-assisted development of resistance to BRaf V600E and MEK inhibitors. Next, RNF43 acted as melanoma suppressor and improved response to targeted therapies in vivo. In line with these findings, RNF43 expression decreases during melanoma progression and RNF43-low patients have a worse prognosis. We conclude that RNF43 is a newly discovered negative regulator of WNT5A-mediated biological responses that desensitizes cells to WNT5A.

Keywords

BRAF V600E; RNF43; ROR1; VANGL1; WNT5A; cancer biology; cell biology; human; melanoma; mouse.

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