eIF4A controls translation of estrogen receptor alpha and is a therapeutic target in advanced breast cancer Journal Article


Authors: Boyer, J. A.; Rosen, E. Y.; Sharma, M.; Dorso, M. A.; Mai, N.; Amor, C.; Reiter, J. M.; Kannan, R.; Gadal, S.; Xu, J.; Miele, M.; Li, Z.; Chen, X.; Chang, Q.; Pareja, F.; Worland, S.; Warner, D.; Sperry, S.; Chiang, G. G.; Thompson, P. A.; Yang, G.; Ouerfelli, O.; Drilon, A.; de Stanchina, E.; Wendel, H. G.; Chandarlapaty, S.; Rosen, N.
Article Title: eIF4A controls translation of estrogen receptor alpha and is a therapeutic target in advanced breast cancer
Abstract: Most breast cancers depend on hormone-stimulated estrogen receptor alpha (ER) activity and are sensitive to ER inhibition. Resistance can arise from activating mutations in the gene encoding ER (ESR1) or from reactivation of downstream targets. Newer ER antagonists occasionally show efficacy but are largely ineffective as single agents in the long term. Here, we show that ER translation is eIF4E/cap-independent yet sensitive to inhibitors of the translation initiation factor eIF4A. EIF4A inhibition reduces the expression of ER and cell cycle regulators such as cyclin D1. This leads to growth suppression in ligand-independent breast cancer models, including those driven by ER mutants and fusion proteins. Efficacy is enhanced by adding the ER degrader, fulvestrant. The combination further lowers ER expression and blocks tumor growth in vitro and in vivo. In an early clinical trial (NCT04092673), the eIF4A inhibitor zotatifin was combined with either fulvestrant or fulvestrant plus CDK4 inhibitor, abemaciclib, in patients with acquired resistance to these agents. Multiple clinical responses including a handful of durable regressions were observed, with little toxicity. Thus, eIF4A inhibition could be useful for treating ER+ breast cancer resistant to other modalities. © 2025 Elsevier B.V., All rights reserved.
Keywords: immunohistochemistry; controlled study; human tissue; protein expression; unclassified drug; gene mutation; human cell; genetics; flow cytometry; cell proliferation; mass spectrometry; mouse; phenotype; animal; cytology; metabolism; animals; mice; gene; metastasis; reverse transcription polymerase chain reaction; apoptosis; phase 2 clinical trial; breast cancer; gene expression; cell growth; tumor volume; cohort analysis; antineoplastic activity; drug effect; drug screening; pathology; xenograft model antitumor assays; cell line, tumor; breast neoplasms; gene expression regulation; gene expression regulation, neoplastic; genetic transfection; messenger rna; protein synthesis; breast tumor; tumor cell line; initiation factor 4e; initiation factor 4e binding protein 1; protein biosynthesis; tamoxifen; translation; 3' untranslated region; phase 1 clinical trial; estrogen receptor; progesterone receptor; drug therapy; trastuzumab; cyclin d1; half life time; estradiol; initiation factor 4a; mcf-7 cells; cyclin dependent kinase 4; argonaute 1 protein; fulvestrant; polyacrylamide gel electrophoresis; cyclin dependent kinase 6; genetic transcription and translation; beta actin; protein kinase b beta; transcription factor sox9; estrogen receptor alpha; gene ontology; liquid chromatography-mass spectrometry; silvestrol; eukaryotic initiation factor-4a; advanced breast cancer; humans; human; female; article; eif4a; gene expression assay; protein p56; cell viability assay; luciferase assay; ic50; abemaciclib; mcf-7 cell line; hek293t cell line; cell proliferation assay; chemiluminescence immunoassay; rocaglamide a; chromatin immunoprecipitation sequencing; zotatifin; oncogene fusion protein; camizestrant; esr1 protein, human; graphpad prism 8.0; eukaryotic translation initiation factor 4g; mcf7/lcc1 cell line
Journal Title: Proceedings of the National Academy of Sciences of the United States of America
Volume: 122
Issue: 30
ISSN: 0027-8424
Publisher: National Academy of Sciences  
Date Published: 2025-07-29
Start Page: e2424286122
Language: English
DOI: 10.1073/pnas.2424286122
PUBMED: 40690678
PROVIDER: scopus
PMCID: PMC12318197
DOI/URL:
Notes: Article -- MSK Cancer Center Support Grant (P30 CA008748) acknowledged in PubMed and PDF -- MSK corresponding authors are Sarat Chandarlapaty and Neal Rosen -- Source: Scopus
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MSK Authors
  1. Neal Rosen
    427 Rosen
  2. Ouathek Ouerfelli
    104 Ouerfelli
  3. Guangli Yang
    35 Yang
  4. Qing Chang
    38 Chang
  5. Hans Guido Wendel
    103 Wendel
  6. Alexander Edward Drilon
    639 Drilon
  7. Xiaoping Chen
    12 Chen
  8. Jianing Xu
    17 Xu
  9. Ram   Kannan
    8 Kannan
  10. Sunyana   Gadal
    7 Gadal
  11. Matthew M Miele
    20 Miele
  12. Madeline Anne Dorso
    8 Dorso
  13. Zhuoning Li
    23 Li
  14. Ezra Y Rosen
    50 Rosen
  15. Jacob Andrew Boyer
    10 Boyer
  16. Jason Reiter
    3 Reiter
  17. Nicholas Mai
    12 Mai
  18. Malvika Sharma
    4 Sharma