Isolation of RNA from exosomes was carried out by the mirVana isolation kit (Ambion, TX, USA) according to the manufacturer's protocol. Briefly, exosomes pellet was lysed with lysis buffer and
exosomal RNA was extracted by miRNA homogenate solution and chloroform. The exosomal RNAwas suspended with 100 ml of DEPC water after purifying by the filter cartridge and the concentration of RNA was quantified using the Nano Drop ND-1000 Spectrophotometer (Nano-Drop Technologies, DE, USA).