IFIT1 and lip and oral cavity carcinoma: We found that exosomes from J1.1 cells stimulated significant expression of TLR3-responsive, ISGs IFIT1 and IFNB114,25,26 as well as an EGF-inducible DEFB103 which encodes human β-defensin-3 (hBD-3) that is produced by proliferating oral cancer cells and involved in macrophage trafficking in tumors27 (Fig. 3g).