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Updated: Jun 4, 2026

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

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Published on: June 7, 2019

Regulation of NR4A nuclear receptor expression by oncogenic BRAF in melanoma cells

Aaron G Smith1, Wen Lim, Michael Pearen

  • 1Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia. a.smith@imb.uq.edu.au

Pigment Cell & Melanoma Research
|March 3, 2011
PubMed

Insights

Activating mutations in NRAS or BRAF drive melanoma. This study reveals NR4A nuclear receptors are regulated by the MAPK pathway, impacting melanoma cell proliferation, survival, and invasiveness.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Activating mutations in NRAS or BRAF are common in melanomas, activating the MAPK pathway.
  • Understanding downstream targets of this pathway is crucial for melanoma genesis research.

Purpose of the Study:

  • To investigate the regulation of NR4A nuclear receptors by the BRAF-MEK-ERK cascade in melanoma.
  • To identify downstream targets of NR4A nuclear receptors in melanoma cells.

Main Methods:

  • Utilized siRNA to down-regulate NR4A1 and NR4A2 expression in melanoma cells.
  • Performed expression profiling to analyze gene alterations post-NR4A1/2 ablation.

Main Results:

  • NR4A1 and NR4A2 are regulated by the BRAF-MEK-ERK cascade in melanoma.
  • NR4A1/2 ablation altered genes involved in melanoma cell proliferation, survival, and invasiveness.
  • Upregulation of Wnt/β-catenin pathway antagonists (DACT1, CITED1) observed after NR4A1/2 ablation.

Conclusions:

  • Dysregulation of NR4A nuclear receptors by the MAPK pathway may contribute to melanoma tumor development.
  • A potential link between NR4A activity and β-catenin signaling in melanoma cells was identified.

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