Find new channel for overcoming chemoresistance in cancers: Role of stem cells-derived exosomal microRNAs.

Chemoresistance has remained a significant concern in tumor recurrence and elevated cancer-related mortalities. A deep insight into mechanisms by which cancerous cells resist administered drugs can pave the way to overcome chemotherapy-induced cell death and develop novel procedures to rescue patients. Regarding accumulated data, stem cell-derived exosomal microRNAs (miRNAs) can be deemed a novel and promising method to overcome chemoresistance. It seems exosomal miRNAs play a dual role in the cancer microenvironment. On the one hand, as a messenger, they are transferred between donor and recipient cells contributing to cancer chemoresistance. On the other hand, stem cell-derived exosomal miRNA significantly restrains tumorigenesis and inhibits or alleviates drug resistance in the tumor niche. Hence, our purpose in this review evaluating the roles of stem cells-derived exosomal microRNAs in overcoming chemoresistance in tumors.