A. Cytotoxicity assay of gemcitabine in T3M4 WT, WT-MUC4KO (4D3), T3M4 SC and SC-MUC4KO (5D10) cells (mean ± SD, n=5). B and C qRT-PCR analysis of mRNA expression of hENT1 and hCNT3 in T3M4 WT, WT-MUC4KO (4D3), T3M4 SC and SC-MUC4KO (5D10) cells (mean ± SD, n=3). D and E Western blotting of protein expression of hENT1 and hCNT3 in T3M4 WT, WT-MUC4KO (3B4 and 4D3), SC, SC-MUC4KO (1E11 and 5D10). β-actin acts as a loading control. Immunohistochemical analysis of hENT1 (F and G) and hCNT3 (H and I) in T3M4 WT, WT-MUC4KO (4D3), T3M4 SC, and SC-MUC4KO (5D10) cells implanted xenograft tumors (mean ± SD, n=5).