Myogenic differentiation-derived small extracellular vesicles as a therapeutic strategy for miR-193b-3p-mediated muscle regeneration.

Small extracellular vesicle-delivered miR-193b-3p enhances muscle regeneration by suppressing AP2M1 in vitro and in a murine muscle loss model.

• Why it matters: Understanding intercellular communication during muscle regeneration is crucial for developing therapies for muscle-wasting conditions, yet the specific mechanisms remain unclear.
• What they did: The study examined miR-193b-3p accumulation in small EVs during human myogenic differentiation and tested its effects via EV and synthetic delivery in vitro and in a mouse model, identifying AP2M1 as a target.
• The result: miR-193b-3p promotes myogenic differentiation and muscle repair by inhibiting AP2M1, which is upregulated in degenerative muscle states, suggesting the miR-193b-3p-AP2M1 axis as a therapeutic target.