Exosomes were isolated from the media of BMDMs (BMDMs-exo), BMDM-polarized M2 macrophages (M2-exo), BMDM-polarized M2 macrophages transfected with si-CRNDE (M2-si-CRNDE-exo), and BMDM-polarized M2 macrophages transfected with the negative control of si-CRNDE (M2-si-control-exo). Then, MFC cells were treated with indicated exosomes and cisplatin (CDDP; 1μg/ml) for 48 h. (C) Representative images of colony formation assay performed on MFC cells. 