Fig. 1. Neurotrophic factor expression by Western blotting analysis. (A) Representative expressions of BDNF, NGF, and GDNF in the brain after contusion of the spinal cord in mice. (B) BDNF significantly elevated compared with those of control group at 2 weeks after SCI (^*p<0.05). (C) Representative expressions of NGF in brain after contusion of the spinal cord in mice. NGF elevated compared with those of control group at 1 and 2 weeks and decreased at 3 days; however, the differences were not significant. (D) Representative GDNF expression in the brain after contusion of the spinal cord in mice. GDNF expression was significantly elevated compared with the control group at 3 days (^*p<0.05). Data are plotted as mean±standard error of the mean. BDNF, brain-derived neurotrophic factor; NGF, nerve growth factor; GDNF, glial cell line-derived neurotrophic factor; SCI, spinal cord injury; GAPDH, glyceraldehyde 3-phosphate dehydrogenase. ^*p<0.05 indicates values significantly different from those of SCI and the control group.