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Updated: Jan 23, 2026

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Revisiting the role of autophagy in melanoma

Shun Li1, Ying Song1, Christine Quach1

  • 1Department of Molecular Microbiology and Immunology, University of Southern California , Los Angeles , CA , USA.

Autophagy
|June 27, 2019
PubMed

Insights

Oncogenic BRAF signaling drives melanoma growth and therapy resistance by inactivating TFEB, a key regulator of the autophagy-lysosome pathway. This study reveals crucial mechanisms in cancer reprogramming.

Area of Science:

  • Oncology
  • Cell Biology
  • Molecular Biology

Background:

  • Alterations in the autophagy-lysosome pathway are common in cancer, but the underlying mechanisms and functional significance remain unclear.
  • Autophagic and lysosomal reprogramming plays a role in cancer progression and treatment resistance.
  • The specific role of oncogenic BRAF signaling in regulating this pathway in melanoma is an area of active investigation.

Purpose of the Study:

  • To elucidate the mechanisms by which oncogenic BRAF signaling influences the autophagy-lysosome pathway in melanoma.
  • To investigate the role of TFEB (transcription factor EB) in mediating BRAF-driven melanoma growth and therapy resistance.
  • To understand how BRAF-induced suppression of the autophagy-lysosome gene network contributes to cancer progression.

Main Methods:

  • Investigated the phosphorylation and functional inactivation of TFEB by oncogenic BRAF signaling.
  • Analyzed the impact of BRAF signaling on the autophagy-lysosome gene network.
  • Utilized models of BRAF-driven melanoma to assess tumor growth and response to BRAF-targeted therapy.

Main Results:

  • Demonstrated that oncogenic BRAF signaling phosphorylates and inactivates TFEB.
  • Showed that TFEB inactivation leads to the suppression of the autophagy-lysosome gene network.
  • Confirmed that this suppression promotes melanoma growth and resistance to BRAF-targeted therapy.

Conclusions:

  • Oncogenic BRAF signaling is a key driver of melanoma progression and therapy resistance through TFEB inactivation and autophagy-lysosome pathway suppression.
  • Understanding these mechanisms offers new insights into cancer prevention and treatment strategies.
  • This study highlights the critical role of the autophagy-lysosome pathway in BRAF-driven melanoma biology.
Keywords:
AutophagyBRAFTFEBlysosomemelanoma

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