AT	adipose tissue
BM	bone marrow
CM	conditioned medium (secretome)
CM2D	secretome/conditioned medium from 2D cultures of mesenchymal stem cells
CM3D	secretome/conditioned medium from 3D cultures of mesenchymal stem cells
Dox	doxorubicin
iMSCs	induced pluripotent stem cell-derived MSCs
IPA	ingenuity pathway analysis
MDR	multidrug resistance
MSCs	mesenchymal stem/stromal cells
MTS	3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium
ROS	reactive oxidative species
TAFs	tumor-associated fibroblasts
TNBC	triple negative invasive breast cancer
UC	umbilical cord