(A–C) [3H]-Gly-Sar uptake in PEPT1-positive PDAC cell lines (Capan-1, SU.86.86) and PEPT1-negative PDAC cell line (MIA PaCa-2) in the presence or absence of glibenclamide at pH 6.5 and 7.5. (D and E) [3H]-Gly-Sar uptake showing dose-dependent inhibition by glibenclamide in PEPT1-positive Capan-1 and SU.86.86 PDAC cell lines. Data are given as mean ± SEM. * P < 0.05, *** P < 0.001.