IL6 and breast cancer: We found that TGF-β (9.4-fold increase, P = 0.0040), IL–6 (7.6-fold increase, P = 0.0005), PTGS2 (8.1-fold increase, P = 0.0002), MMP–9 (9.4-fold increase, P = 0.0081), and VEGF (7.6-fold increase, P = 0.0005) mRNA expression significantly increased in mice in the BC group as compared to mice in the BS group.