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Updated: Apr 27, 2026

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

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RAB7 controls melanoma progression by exploiting a lineage-specific wiring of the endolysosomal pathway

Direna Alonso-Curbelo1, Erica Riveiro-Falkenbach1, Eva Pérez-Guijarro1

  • 1Melanoma Laboratory, Molecular Oncology Programme, Spanish National Cancer Research Centre (CNIO), Madrid 28029, Spain.

Cancer Cell
|July 2, 2014
PubMed

Insights

Melanoma cells depend on RAB7, a lysosomal protein, for tumor progression and metastasis. This dependency is regulated by SOX10 and MYC, offering new therapeutic targets for melanoma.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Common cancer hallmarks are known, but lineage-restricted oncogenes in melanoma are less understood.
  • Melanoma exhibits unique genetic dependencies distinct from over 35 other tumor types.

Purpose of the Study:

  • To investigate the role of lineage-restricted oncogenes in melanoma.
  • To identify key regulators of melanoma progression and metastatic risk.

Main Methods:

  • Analysis of human melanoma cells, clinical specimens, and mouse models.
  • Investigated the function of the small GTPase RAB7 in melanoma.
  • Examined the regulatory relationship between RAB7, SOX10, and MYC.

Main Results:

  • Melanoma cells show an inherent dependency on the small GTPase RAB7, located in a lysosomal gene cluster.
  • RAB7 acts as an early melanoma driver, influencing tumor invasion and metastatic risk.
  • RAB7 regulation is independent of MITF, relying instead on SOX10 and MYC.

Conclusions:

  • Melanoma exploits a unique lysosomal pathway wiring involving RAB7 for tumor progression.
  • RAB7, regulated by SOX10 and MYC, represents a novel therapeutic target for melanoma.

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