Abstract
Triple-negative breast cancer (TNBC) patients have the worst prognosis and distant metastasis-free survival among all major subtypes of breast cancer. The poor clinical outlook is further exacerbated by a lack of effective targeted therapies for TNBC. Here we show that ectopic expression and therapeutic delivery of the secreted protein Tubulointerstitial nephritis antigen-like 1 (Tinagl1) suppresses TNBC progression and metastasis through direct binding to integrin α5β1, αvβ1, and epidermal growth factor receptor (EGFR), and subsequent simultaneous inhibition of focal adhesion kinase (FAK) and EGFR signaling pathways. Moreover, Tinagl1 protein level is associated with good prognosis and reversely correlates with FAK and EGFR activation status in TNBC. Our results suggest Tinagl1 as a candidate therapeutic agent for TNBC by dual inhibition of integrin/FAK and EGFR signaling pathways.
Original language | English (US) |
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Pages (from-to) | 64-80.e7 |
Journal | Cancer Cell |
Volume | 35 |
Issue number | 1 |
DOIs | |
State | Published - Jan 14 2019 |
All Science Journal Classification (ASJC) codes
- Oncology
- Cancer Research
Keywords
- EGFR
- FAK
- Tinagl1
- extracellular matrix
- integrin
- metastasis
- triple-negative breast cancer
- tumor-stromal interaction