作者
Pasquale Sansone,Claudio Ceccarelli,Marjan Berishaj,Qing Chang,Vinagolu K. Rajasekhar,Fabiana Perna,Robert L. Bowman,Michele Vidone,Laura Daly,Jennifer Nnoli,Donatella Santini,Mario Taffurelli,Natalie Shih,Michael Feldman,Jun J. Mao,Christopher Colameco,Jinbo Chen,Angela DeMichele,Nicola Fabbri,John H. Healey,Monica Cricca,Giuseppe Gasparre,David Lyden,Massimiliano Bonafè,Jacqueline Bromberg
摘要
Abstract The mechanisms of metastatic progression from hormonal therapy (HT) are largely unknown in luminal breast cancer. Here we demonstrate the enrichment of CD133 hi /ER lo cancer cells in clinical specimens following neoadjuvant endocrine therapy and in HT refractory metastatic disease. We develop experimental models of metastatic luminal breast cancer and demonstrate that HT can promote the generation of HT-resistant, self-renewing CD133 hi /ER lo /IL6 hi cancer stem cells (CSCs). HT initially abrogates oxidative phosphorylation (OXPHOS) generating self-renewal-deficient cancer cells, CD133 hi /ER lo /OXPHOS lo . These cells exit metabolic dormancy via an IL6-driven feed-forward ER lo -IL6 hi -Notch hi loop, activating OXPHOS, in the absence of ER activity. The inhibition of IL6R/IL6-Notch pathways switches the self-renewal of CD133 hi CSCs, from an IL6/Notch-dependent one to an ER-dependent one, through the re-expression of ER. Thus, HT induces an OXPHOS metabolic editing of luminal breast cancers, paradoxically establishing HT-driven self-renewal of dormant CD133 hi /ER lo cells mediating metastatic progression, which is sensitive to dual targeted therapy.