NR2F1 and mTORC1 provide the bridge between melanoma dormancy and therapeutic resistance

J Clin Invest. 2025 Sep 16;135(18):e197764. doi: 10.1172/JCI197764.

Abstract

Cutaneous melanoma (CM) is known for its aggressive behavior, high metastatic potential, and poor prognosis. Mutations in the BRAF gene are common in CM, and patients with BRAF-mutant melanoma often respond well to combined inhibition of BRAF and MEK (BRAFi + MEKi). Although BRAFi + MEKi therapy provides clinical efficacy, the response durability is limited by persistent drug-tolerant residual cells, culminating in relapse. In this issue of the JCI, Tiago et al. confirmed that NR2F1, a dormancy-associated transcription factor, is a key determinant of therapeutic resistance in melanoma. NR2F1 expression was elevated in transcriptomic datasets from patients with minimal residual disease, and in murine and human melanoma models, NR2F1 overexpression reduced therapeutic efficacy and suppressed tumor proliferation and invasion while sustaining mechanistic target of rapamycin complex 1 (mTORC1) transcriptional regulation of relevant genes. Combining BRAFi + MEKi with the mTORC1 inhibitor rapamycin effectively targeted these resistant melanoma cells, suggesting a potential path forward for targeting NR2F1 and mTORC1 signaling in patients with CM.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • COUP Transcription Factor I* / genetics
  • COUP Transcription Factor I* / metabolism
  • Drug Resistance, Neoplasm*
  • Humans
  • Mechanistic Target of Rapamycin Complex 1* / genetics
  • Mechanistic Target of Rapamycin Complex 1* / metabolism
  • Melanoma* / drug therapy
  • Melanoma* / genetics
  • Melanoma* / metabolism
  • Melanoma* / pathology
  • Mice
  • Neoplasm Proteins* / genetics
  • Neoplasm Proteins* / metabolism
  • Skin Neoplasms* / drug therapy
  • Skin Neoplasms* / genetics
  • Skin Neoplasms* / metabolism
  • Skin Neoplasms* / pathology

Substances

  • Mechanistic Target of Rapamycin Complex 1
  • COUP Transcription Factor I
  • NR2F1 protein, human
  • Neoplasm Proteins