ArticleFrontiers in cell and developmental biology2025
Estrogen-induced FXR1 promotes endocrine resistance and bone metastasis in breast cancer via BCL2 and GPX4.
Article in Frontiers in cell and developmental biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Targeting ZNF570 activates ferroptosis to reverse tamoxifen resistance in ER + breast cancer cells.Naunyn-Schmiedeberg's archives of pharmacology · 2026Article
- The Role of Se-Containing Glutathione Peroxidases and Thioredoxin Reductases in Oncogenesis: Expression Paradoxes and Therapeutic Prospects.Antioxidants (Basel, Switzerland) · 2026Review
- Research Progress on Signaling Pathways in Breast Cancer Bone Metastasis.Oncology research · 2026Review
- Natural Compounds as Modulators of Ferroptosis: Mechanistic Insights and Therapeutic Prospects in Breast Cancer.Biomolecules · 2025Review
- Anesthesia-Induced Ferroptosis: Bidirectional Regulation and Molecular Mechanisms in Cardio-Cerebral Injury.Journal of inflammation research · 2025Review
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Authors and funding
15 authors.
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Abstract
Estrogen signaling dysregulation plays a critical role in the development of anti-estrogen resistance and bone metastasis of ER+ mammary carcinoma. Using quantitative proteomic screening, we identified FXR1 as an estrogen-regulated RNA-binding protein associated with anti-estrogen resistance. Mechanistically, estrogen and IGF1 facilitate FXR1 protein translation via the PI3K/AKT/mTOR/EIF4E pathway. FXR1 enhances cellular resistance to apoptosis and ferroptosis by facilitating the maturation of BCL2 pre-mRNA and stabilizing GPX4 mRNA, respectively. Anti-estrogen resistant cells exhibit elevated FXR1 expression, and FXR1 depletion restores their sensitivity to tamoxifen. Moreover, combining FXR1 depletion with a ferroptosis inducer induces synergistic lethal in anti-estrogen resistant cells. Finally, we provide proof-of-concept evidence supporting FXR1 antagonism as a potential treatment for bone metastases in ER+ breast cancer. Our findings highlight FXR1 as a promising therapeutic target to improve existing therapeutic regimes for ER+ breast cancer patients.
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