Glioblastoma (GBM) is highly refractory to therapy and associated with poor clinical outcome. Here, we reveal a critical function of the promitotic and adhesion-mediating discoidin domain receptor 1 (DDR1) in modulating GBM therapy resistance. In GBM cultures and clinical samples, we show a DDR1 and GBM stem cell marker co-expression that correlates with patient outcome. We demonstrate that inhibition of DDR1 in combination with radiochemotherapy with temozolomide in GBM models enhances sensitivity and prolongs survival superior to conventional therapy. We identify a 14-3-3-Beclin-1-Akt1 protein complex assembling with DDR1 to be required for prosurvival Akt and mTOR signaling and regulation of autophagy-associated therapy sensitivity. Our results uncover a mechanism driven by DDR1 that controls GBM therapy resistance and provide a rationale target for the development of therapy-sensitizing agents.
Interaction of Discoidin Domain Receptor 1 with a 14-3-3-Beclin-1-Akt1 Complex Modulates Glioblastoma Therapy Sensitivity.
A. Vehlow,E. Klapproth,Sha Jin,Ricarda Hannen,Maria Hauswald,J. Bartsch,C. Nimsky,A. Temme,B. Leitinger,N. Cordes
Published 2019 in Cell Reports
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- Publication year
2019
- Venue
Cell Reports
- Publication date
2019-03-26
- Fields of study
Biology, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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