The mRNA expression levels of VEGFA, VEGFB, VEGFD, PDGFB, PDGFC, THBS1, PGF, and CXCL9 were significantly upregulated in CRC cells with USP13 knockdown, while WNT7B and MMP2 mRNA expression levels were significantly downregulated (Fig. 4A). Here, PDGFB is linked to colorectal carcinoma.