COL4A2 and cancer: According to the RNA-seq data from TCGA-STAD, the mRNA expression levels of COL6A3, COL1A1, COL1A2, PDGFRB, THBS2, COL4A1, COL4A2, VEGFC, FN1, LAMB1, and EFNA4 were significantly higher in cancer tissues compared to normal tissues (Figure S1).