In order to confirm the role of BSF-secreted IL-6 in promoting EMT and stemness in BC cells, IL-6 was neutralized using a specific anti-IL-6 antibody in TCF64-ORF-SFCM, while IgG was used as negative control in both TCF64-ORF-SFCM and TCF64-CTL-SFCM. This evidence concerns the gene IL6 and breast cancer.