PTBP1 and neoplasm: We next analyzed the Pearson correlation of PTBP expression with the sensitivity of 263 FDA-approved drugs in 60 tumor cell lines using the Cellminer database (Figures 8A–C) and obtained the top six drugs with the strongest correlation with PTBPs. For example, the expression of PTBP1 was proportional to the sensitivity of cells to gemcitabine (R = 0.409, p = 0.001): the higher the expression of PTBP1, the more sensitive the cell was to gemcitabine.