Fibroblast growth factor receptor signaling modulates cholesterol storage in a SOAT1-dependent manner to promote mammary tumor cell invasion

Breast Cancer Res. 2025 Jul 15;27(1):132. doi: 10.1186/s13058-025-02084-9.

Abstract

Signaling by fibroblast growth factor receptors (FGFRs) is active in up to 85% of breast cancers and results in enhanced proliferation, migration, and invasion of tumor cells. Here, we show that FGFR signaling regulates cholesterol metabolism in breast cancer. Specifically, we demonstrate that FGFR activation promotes cellular cholesterol storage by upregulating expression of the enzyme sterol O-acyltransferase 1 (SOAT1). Moreover, we demonstrate that inhibition of SOAT1 attenuates FGFR-driven colony formation and invasion in tumor cells, which correlates with reduced expression of matrix metalloproteinase expression. Furthermore, genetic knockdown of SOAT1 decreases mammary tumor growth in vivo. Taken together, these findings suggest a largely undiscovered metabolic role for FGFR signaling in regulating cholesterol metabolism in breast cancer and present a therapeutic vulnerability that could be targeted in FGFR-driven cancers.

Keywords: Cholesterol metabolism; Cholesterol storage; Fibroblast growth factor; Triple-negative breast cancer.

MeSH terms

  • Animals
  • Breast Neoplasms* / genetics
  • Breast Neoplasms* / metabolism
  • Breast Neoplasms* / pathology
  • Cell Line, Tumor
  • Cell Movement
  • Cell Proliferation
  • Cholesterol* / metabolism
  • Female
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Mice
  • Neoplasm Invasiveness
  • Receptors, Fibroblast Growth Factor* / genetics
  • Receptors, Fibroblast Growth Factor* / metabolism
  • Signal Transduction
  • Sterol O-Acyltransferase* / genetics
  • Sterol O-Acyltransferase* / metabolism

Substances

  • Cholesterol
  • Receptors, Fibroblast Growth Factor
  • Sterol O-Acyltransferase
  • sterol O-acyltransferase 1