Abstract
Elevated expression of non-receptor tyrosine kinase FER is an independent prognosticator that correlates with poor survival of high-grade and basal/triple-negative breast cancer (TNBC) patients. Here, we show that high FER levels are also associated with improved outcomes after adjuvant taxane-based combination chemotherapy in high-risk, HER2-negative patients. In TNBC cells, we observe a causal relation between high FER levels and sensitivity to taxanes. Proteomics and mechanistic studies demonstrate that FER regulates endosomal recycling, a microtubule-dependent process that underpins breast cancer cell invasion. Using chemical genetics, we identify DCTN2 as a FER substrate. Our work indicates that the DCTN2 tyrosine 6 is essential for the development of tubular recycling domains in early endosomes and subsequent propagation of TNBC cell invasion in 3D. In conclusion, we show that high FER expression promotes endosomal recycling and represents a candidate predictive marker for the benefit of adjuvant taxane-containing chemotherapy in high-risk patients, including TNBC patients.
Original language | English |
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Article number | 110584 |
Journal | Cell Reports |
Volume | 39 |
Issue number | 1 |
DOIs | |
Publication status | Published - 5 Apr 2022 |
Externally published | Yes |
Bibliographical note
Funding Information:We thank N. Bovenschen, M. Hadders, B. Levin, K. Shokat, R. Schackmann, I. Ivanova, and S. Boogaard for the experimental support. Also, we thank the Dutch Breast Cancer Research Group (BOOG) for providing clinical data from the BOOG 2005-02 MATADOR study. This research was supported by KWF Kankerbestrijding ( UU2014-7201 ), the Dutch Research Council TOP grant ( NWO-TOP 02007 ), and the European Union’s Horizon 2020 FET Proactive program under grant agreement no. 731957 (MECHANO-CONTROL).
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