High FOXA1 levels induce ER transcriptional reprogramming, a pro-metastatic secretome, and metastasis in endocrine-resistant breast cancer

Xiaoyong Fu, Resel Pereira, Chia Chia Liu, Carmine De Angelis, Martin J. Shea, Sarmistha Nanda, Lanfang Qin, Tamika Mitchell, Maria L. Cataldo, Jamunarani Veeraraghavan, Vidyalakshmi Sethunath, Mario Giuliano, Carolina Gutierrez, Balázs Győrffy, Meghana V. Trivedi, Ofir Cohen, Nikhil Wagle, Agostina Nardone, Rinath Jeselsohn, Mothaffar F. RimawiC. Kent Osborne, Rachel Schiff

Research output: Contribution to journalArticlepeer-review

Abstract

Aberrant activation of the forkhead protein FOXA1 is observed in advanced hormone-related cancers. However, the key mediators of high FOXA1 signaling remain elusive. We demonstrate that ectopic high FOXA1 (H-FOXA1) expression promotes estrogen receptor-positive (ER+) breast cancer (BC) metastasis in a xenograft mouse model. Mechanistically, H-FOXA1 reprograms ER-chromatin binding to elicit a core gene signature (CGS) enriched in ER+ endocrine-resistant (EndoR) cells. We identify Secretome14, a CGS subset encoding ER-dependent cancer secretory proteins, as a strong predictor for poor outcomes of ER+ BC. It is elevated in ER+ metastases vs. primary tumors, irrespective of ESR1 mutations. Genomic ER binding near Secretome14 genes is also increased in mutant ER-expressing or mitogen-treated ER+ BC cells and in ER+ metastatic vs. primary tumors, suggesting a convergent pathway including high growth factor receptor signaling in activating pro-metastatic secretome genes. Our findings uncover H-FOXA1-induced ER reprogramming that drives EndoR and metastasis partly via an H-FOXA1/ER-dependent secretome.

Original languageEnglish
Article number112821
JournalCell Reports
Volume42
Issue number8
DOIs
StatePublished - 29 Aug 2023

Keywords

  • CP: Cancer
  • breast cancer
  • cistrome
  • endocrine resistance
  • enhancer
  • epigenetic
  • estrogen receptor
  • forkhead box protein A1
  • metastasis
  • secretome
  • transcription factor

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology

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