PPFIA4 and colorectal carcinoma: The results confirmed that both mRNA (Figure 3B - a to c) and protein (Figures 3C and 3D- a to c) expression of PPFIA1, PPFIA3, and PPFIA4 were increased in CRC cell lines compared to the normal colon cell line, and the differences were statistically significant (**P < 0.01, ***P < 0.001).