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Updated: Jul 27, 2025

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
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Epigenetic suppression of PGC1α (PPARGC1A) causes collateral sensitivity to HMGCR-inhibitors within BRAF-treatment

Jiaxin Liang1,2, Deyang Yu1,2, Chi Luo1,2,3

  • 1Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA, USA.

Nature Communications
|June 5, 2023
PubMed

Insights

Targeted BRAF therapy resistance in melanoma can be linked to suppressed PGC1α. Statins, a type of HMGCR inhibitor, show promise in treating these aggressive, recurring melanomas by targeting metabolic vulnerabilities.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Targeted BRAF(V600E) therapies improve melanoma survival but acquired resistance leads to recurrence.
  • Epigenetic suppression of PGC1α (peroxisome proliferator-activated receptor gamma coactivator 1-alpha) is associated with aggressive, treatment-resistant melanomas.

Purpose of the Study:

  • To investigate the role of PGC1α suppression in BRAF-inhibitor resistant melanoma.
  • To identify pharmacological vulnerabilities in PGC1α-suppressed melanoma.
  • To evaluate statins as a potential treatment strategy for recurrent melanoma.

Main Methods:

  • Metabolism-centered pharmacological screening to identify drug sensitivities in PGC1α-suppressed melanoma cells.
  • Analysis of gene expression (RAB6B, RAB27A) and protein prenylation.
  • Assessment of integrin-FAK signaling and extracellular matrix interactions.

Main Results:

  • Epigenetic suppression of PGC1α defines an aggressive subset of BRAF-inhibitor resistant melanomas.
  • Statins (HMGCR inhibitors) represent a collateral vulnerability in these resistant melanomas.
  • Reduced PGC1α leads to decreased RAB6B and RAB27A expression, increased integrin-FAK signaling, and enhanced metastatic potential; statin treatment reverses this by inhibiting prenylation.

Conclusions:

  • Chronic adaptation to BRAF-targeted therapies induces novel metabolic vulnerabilities in melanoma.
  • HMGCR inhibitors (statins) may offer a therapeutic strategy for melanomas with suppressed PGC1α.
  • Re-expression of RAB6B and RAB27A can reverse statin sensitivity, highlighting a potential resistance mechanism.

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