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Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
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CEACAM1 is a direct SOX10 target and inhibits melanoma immune infiltration and stemness

John Abou-Hamad1,2, Jonathan J Hodgins1,3, Christiano T de Souza1

  • 1Centre for Cancer Therapeutics, Ottawa Hospital Research Institute, 501 Smyth Road, Ottawa, ON K1H 8L6, Canada.

Iscience
|November 28, 2022
PubMed

Insights

SOX10, a key melanoma regulator, influences T-cell infiltration and cancer stem cell (CSC) properties. This study reveals SOX10 directly controls CEACAM1, impacting tumor growth through both pro- and anti-tumorigenic roles.

Area of Science:

  • Oncology
  • Molecular Biology
  • Immunology

Background:

  • SOX10 is a critical regulator in melanoma development.
  • SOX10 influences melanocytic differentiation and tumor progression.
  • Melanoma cell lines with SOX10 loss maintain in vivo growth.

Purpose of the Study:

  • To investigate the role of SOX10 in melanoma progression.
  • To identify downstream targets of SOX10.
  • To elucidate the dual role of SOX10 in tumor immunity and stemness.

Main Methods:

  • Identification of SOX10-deficient melanoma cell lines.
  • Analysis of SOX10's effect on T-cell infiltration and cancer stem cell (CSC) properties.
  • Investigation of SOX10 binding to the CEACAM1 promoter using ChIP assays.
  • Assessment of the SOX10-CEACAM1 axis on tumor growth.

Main Results:

  • SOX10 regulates CEACAM1, a protein involved in immune modulation.
  • SOX10 directly binds to a distal promoter region of CEACAM1.
  • The SOX10-CEACAM1 interaction suppresses CD8+ T-cell infiltration and reduces the CSC pool.
  • SOX10 exhibits both pro- and anti-tumorigenic functions in melanoma.

Conclusions:

  • SOX10 directly regulates CEACAM1 expression in melanoma.
  • The SOX10-CEACAM1 axis plays a significant role in modulating the tumor microenvironment.
  • SOX10 presents a complex role in melanoma, influencing tumor growth, immune response, and stem cell characteristics.
Keywords:
Cell biologyImmunologyStem cells research

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