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Δευτέρα 27 Νοεμβρίου 2017

Small molecule inhibition of Axl targets tumor immune suppression and enhances chemotherapy in pancreatic cancer

Activation of the receptor tyrosine kinase Axl is associated with poor outcomes in pancreatic cancer (PDA), where it coordinately mediates immune evasion and drug resistance. Here we demonstrate that the selective Axl kinase inhibitor BGB324 targets the tumor-immune interface to blunt the aggressive traits of PDA cells in vitro and enhance gemcitibine efficacy in vivo. Axl signaling stimulates the TBK1-NFκB pathway and innate immune suppression in the tumor microenvironment. In tumor cells, BGB324 treatment drove epithelial differentiation, expression of nucleoside transporters affecting gemcitabine response and an immune stimulatory microenvironment. Our results establish a preclinical mechanistic rationale for the clinical development of Axl inhibitors to improve the treatment of PDA patients.

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