Fig. 6From: Tumor-derived exosomal ADAM17 promotes pre-metastatic niche formation by enhancing vascular permeability in colorectal cancerADAM17 selective inhibitor JG26 and oral inhibitor aderbasib effectively reduce colorectal cancer (CRC) metastasis in vivo. (a) Schematic illustration of the tumor metastasis experiments used to assess EMT-HCT116-Exo-treated mice that were administered ADAM17 selective inhibitor JG26 (3 mg/kg, IV) and ADAM17 oral inhibitor aderbasib (30 mg/kg, PO). (b) Representative immunohistochemistry staining for VE-cadherin and immunofluorescence staining of CD34/VE-cadherin at the invasive front in mice with CRC (black scale bar = 50 μm, white scale bar = 25 μm). (c) Relative VE-cadherin level at the invasive front (n = 10) and CTC counts (n = 20) in EMT-HCT116-Exo-treated mice (3 mg/kg JG26, IV; 30 mg/kg aderbasib, PO). (d) Representative H&E staining results of lung sections from EMT-HCT116-Exo-treated mice (3 mg/kg JG26, IV; 30 mg/kg aderbasib, PO). Arrows indicate tumor nodules. Scale bar = 250 μm. (e) Evans blue accumulation in the lung parenchyma (n = 8). (f) Percentage of mice with lung metastasis, alongside the number and maximal diameter of metastatic nodules in the lungs of EMT-HCT116-Exo-treated mice (3 mg/kg JG26, IV; 30 mg/kg aderbasib, PO). (g) Representative H&E staining results of liver sections from EMT-HCT116-Exo-treated mice (3 mg/kg JG26, IV; 30 mg/kg aderbasib, PO). Arrows indicate tumor nodules. Scale bar = 250 μm. (h) Evans blue accumulation in the liver parenchyma (n = 8). (i) Percentage of mice with liver metastasis, alongside the number and maximal diameter of metastatic nodules in the liver of EMT-HCT116-Exo-treated mice (3 mg/kg JG26, IV; 30 mg/kg aderbasib, PO). Data are expressed as mean ± standard deviation. *P < 0.05, **P < 0.01, compared with the control group; #P < 0.05, ##P < 0.01, compared with the EMT-HCT116-Exo groupBack to article page