HRAS and prostate cancer: One group reported that the tumorigenic reprogramming of MSCs in prostate cancer was associated with exosomal oncogenic factors such as H-ras and K-ras transcripts, oncomiRNAs, miR-125b etc. [28] Another group suggested that prostate cancer cells could trigger differentiation of fibroblasts into myofibroblasts through exosomal TGF-β [26].