Treatment with α9 integrin and kindlin-1 promotes electrophysiological improvement. A, Electrophysiological recordings at the right C7 dorsal horn with right C7 dorsal root intact as an internal control, and the left C7 dorsal horn with left C7 dorsal root injured (12 weeks after crush/regeneration) and then cut in fGFP, α9, kindlin1, and α9 + kindlin1 treatment groups. B, Peak-to-peak voltage amplitude of the intact/injured recordings from each treatment group, analyzed by one-way ANOVA and expressed as mean ± SEM. *p < 0.05 and **p < 0.01 were statistically significant, n = 5.