CCL11 and breast cancer: Here, to know whether there are differences of miR-29b down-regulation on drug resistance of breast cancer cells, MCF-7 cells were treated with CM-CAFs, CM-CAFs/miR-29b-1 or CM-CAFs/miR-29b-2 and exposed to paclitaxel (10uM) or CCL11 or CXCL14.