FIGURE 4.
A possible mechanism of action of exosomal non-coding RNAs in osteoporosis (schematic). Different sources of exosomal non-coding RNAs, such as miRNA, lncRNA, circRNA, and tRNA, promote or inhibit the activity of osteoblasts and osteoclasts by regulating different targets, thereby affecting the course of osteoporosis. ↑: promotion; ↓: inhibition.