MiR-17-92 cluster elevated MSC exosomes increase neurite remodeling in the IBZ. Bielshowsky silver and Luxol fast blue double-staining (A row), SMI-31 immunostaining (B row) and synaptophysin immunostaining (C row) show that based on the increase of neurite remodeling and synaptic plasticity in the IBZ by the Ex-Con treatment, the Ex-miR-17-92+ treatment further increased neurite remodeling and synaptic plasticity in the IBZ. LP: MCAO rats treated with liposome; EV: MCAO rats treated with Ex-Con; 17-92: MCAO rats treated with Ex-miR-17-92+. *P<0.05, compared to LP; # P<0.05 compared to EV, respectively. Mean±SE, n=5/group. Scale bar=50 µm.