CXCL10 and breast carcinoma: In order to determine whether exogenous CXCL10 treatment promotes breast cancer cell proliferation, we added CXCL10 to MCF-7 and MDA-MB-231 cell lines at a concentration of 20 ng/ml, 40 ng/ml, 60 ng/ml, 80 ng/ml, and 100 ng/ml, respectively (Fig. 2).