Fig. 4

hWJ-MSC treatment promotes long-term axonal regeneration. Photomontage of optic nerve sections labeled with CTB-Alexa555 120 days after lesion and treatment with vehicle (a) or hWJ-MSCs (b). b′, b″ Insets of b with arrow indicating individual axons. c Graph representing the mean ± SEM of axons at respective distances from crush site in the vehicle- or hWJ-MSC-treated groups. Two-way ANOVA, ***P < 0.001. Scale bars 200 μm for a and b; 40 μm for b′ and b″