| Added by | Cavailles |
|---|---|
| Group name | EquipeVC |
| Item Type | Journal Article |
| Title | Increased expression of the HDAC9 gene is associated with antiestrogen resistance of breast cancers |
| Creator | Linares et al. |
| Author | Aurélien Linares |
| Author | Said Assou |
| Author | Marion Lapierre |
| Author | Erwan Thouennon |
| Author | Céline Duraffourd |
| Author | Carole Fromaget |
| Author | Abdelhay Boulahtouf |
| Author | Gao Tian |
| Author | Jiafu Ji |
| Author | Ozgur Sahin |
| Author | Eric Badia |
| Author | Nathalie Boulle |
| Author | Vincent Cavaillès |
| Abstract | Estrogens play a pivotal role in breast cancer etiology, and endocrine therapy remains the main first line treatment for estrogen receptor-alpha (ER?)-positive breast cancer. ER are transcription factors whose activity is finely regulated by various regulatory complexes, including histone deacetylases (HDACs). Here, we investigated the role of HDAC9 in ER? signaling and response to antiestrogens in breast cancer cells. Various Michigan Cancer Foundation-7 (MCF7) breast cancer cell lines that overexpress class IIa HDAC9 or that are resistant to the partial antiestrogen 4-hydroxy-tamoxifen (OHTam) were used to study phenotypic changes in response to ER ligands by using transcriptomic and gene set enrichment analyses. Kaplan-Meier survival analyses were performed using public transcriptomic datasets from human breast cancer biopsies. In MCF7 breast cancer cells, HDAC9 decreased ER? mRNA and protein expression and inhibited its transcriptional activity. Conversely, HDAC9 mRNA was strongly overexpressed in OHTam-resistant MCF7 cells and in ER?-negative breast tumor cell lines. Moreover, HDAC9-overexpressing cells were less sensitive to OHTam antiproliferative effects compared with parental MCF7 cells. Several genes (including MUC1, SMC3 and S100P) were similarly deregulated in OHTam-resistant and in HDAC9-overexpressing MCF7 cells. Finally, HDAC9 expression was positively associated with genes upregulated in endocrine therapy-resistant breast cancers and high HDAC9 levels were associated with worse prognosis in patients treated with OHTam. These results demonstrate the complex interactions of class IIa HDAC9 with ER? signaling in breast cancer cells and its effect on the response to hormone therapy. |
| Publication | Molecular Oncology |
| Volume | 13 |
| Issue | 7 |
| Pages | 1534-1547 |
| Date | 2019-07 |
| Journal Abbr | Mol Oncol |
| Language | eng |
| DOI | 10.1002/1878-0261.12505 |
| ISSN | 1878-0261 |
| Library Catalog | PubMed |
| Extra | PMID: 31099456 PMCID: PMC6599838 |
| Tags | antiestrogen resistance, Antineoplastic Agents, Hormonal, breast cancer, Breast Neoplasms, Drug Resistance, Neoplasm, Estrogen Antagonists, estrogen receptor, Estrogen Receptor alpha, Female, first-last-corresponding, histone deacetylase, Histone Deacetylases, Humans, MCF-7 Cells, original, own, Repressor Proteins, top, Transcriptome, Up-Regulation |
| Date Added | 2019/10/22 - 10:07:02 |
| Date Modified | 2023/11/21 - 14:18:26 |
| Notes and Attachments | PubMed entry (Attachment) PubMed entry (Attachment) Texte intégral (Attachment) Texte intégral (Attachment) |
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