Fig. 2

Gel-Exo facilitated recovery after complete SCI. A SEM analysis of Gel-Exo. B A representative stress–strain curve of Gel-Exo. C Body weight changes after the operation. D BMS open-field walking scores of mice with different treatments post-SCI over the course of 8 weeks. *p < 0.05 and **p < 0.01, when compared to the SCI group. E Electrophysiological analysis of the mice with different treatments after SCI. F The amplitude of MEPs; 3.23 ± 2.34, 3.52 ± 3.51, and 25.76 ± 5.65 μV for the SCI group, Gel group, and Gel-Exo group, respectively. *p < 0.05 and **p < 0.01, when compared to the SCI group or Gel group. G, H Expression of key neural markers in the injured spinal cord in each group. *p < 0.05 and **p < 0.01, when compared to the SCI group or sham group