COL6A2 and breast cancer: To explore the interaction network of core genes at the protein level, the PPI network was constructed using the STRING database and visualized using Cytoscape 3.7.1 (Figure 7F) Ten core genes were obtained by screening based on BC values: VCL, DUSP1, FLNA, THBS1, TAGLN, ACTA2, COL6A2, VWF, CXCR4, and CALD1.