Artículo
Tamoxifen resistance in breast cancer is regulated by the EZH2–ERa–GREB1 transcriptional axis
Wu, Yanming; Zhang, Zhao; Cenciarini, Mauro Ezequiel
; Proietti Anastasi, Cecilia Jazmín
; Amasino, Matías Federico
; Hong, Tao; Yang, Mei; Liao, Yiji; Chiang, Huai-Chin; Kaklamani, Virginia G.; Jeselsohn, Rinath; Vadlamudi, Ratna K.; Huang, Tim Hui Ming; Li, Rong; De Angelis, Carmine; Fu, Xiaoyong; Elizalde, Patricia Virginia
; Schiff, Rachel; Brown, Myles; Xu, Kexin
Fecha de publicación:
02/2018
Editorial:
American Association for Cancer Research
Revista:
Cancer Research
ISSN:
0008-5472
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Resistance to cancer treatment can be driven by epigenetic reprogramming of specific transcriptomes in favor of the refractory phenotypes. Here we discover that tamoxifen resistance in breast cancer is driven by a regulatory axis consisting of a master transcription factor, its cofactor, and an epigenetic regulator. The oncogenic histone methyltransferase EZH2 conferred tamoxifen resistance by silencing the expression of the estrogen receptor a (ERa) cofactor GREB1. In clinical specimens, induction of DNA methylation of a particular CpG-enriched region at the GREB1 promoter negatively correlated with GREB1 levels and cell sensitivity to endocrine agents. GREB1 also ensured proper cellular reactions to different ligands by recruiting distinct sets of ERa cofactors to cis-regulatory elements, which explains the contradictory biological effects of GREB1 on breast cancer cell growth in response to estrogen or antiestrogen. In refractory cells, EZH2-dependent repression of GREB1 triggered chromatin reallocation of ERa coregulators, converting the antiestrogen into an agonist. In clinical specimens from patients receiving adjuvant tamoxifen treatment, expression levels of EZH2 and GREB1 were correlated negatively, and taken together better predicted patient responses to endocrine therapy. Overall, our work suggests a new strategy to overcome endocrine resistance in metastatic breast cancer by targeting a particular epigenetic program. Significance: This study suggests a new strategy to overcome endocrine resistance in metastatic breast cancer by targeting a particular epigenetic program defined within.
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Articulos(IBYME)
Articulos de INST.DE BIOLOGIA Y MEDICINA EXPERIMENTAL (I)
Articulos de INST.DE BIOLOGIA Y MEDICINA EXPERIMENTAL (I)
Citación
Wu, Yanming; Zhang, Zhao; Cenciarini, Mauro Ezequiel; Proietti Anastasi, Cecilia Jazmín; Amasino, Matías Federico; et al.; Tamoxifen resistance in breast cancer is regulated by the EZH2–ERa–GREB1 transcriptional axis; American Association for Cancer Research; Cancer Research; 78; 3; 2-2018; 671-684
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