PTBP1 and gastric cancer: In addition, the GEPIA and cBioPortal database indicated that there was a positive correlation between the expression level of CCAT1 and PTBP1 in GC tissues (Fig. 5H, I), and the results were further validated in our cohort included 36 GC cases (r = 0.539, p = 0.001) (Fig. 5J).