Effect of GSNO on enhanced expression of synaptophysin, BDNF, and TrkB at 14
th day after TBI. IHC photomicrographs show reduced expression of synaptophysin (A, red fluorescence), BDNF (B, brown diaminobenzidine staining), and TrkB (C, red fluorescence) in the traumatic penumbra region of the TBI group. Sham and GSNO groups show enhanced expression of synaptophysin, BDNF and TrkB compared to the TBI group. Photomicrographs are representative of n = 3 in each group.