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Motor impairment induced by traumatic brain injury (TBI) may be mediated through changes in spinal molecular systems regulating neuronal plasticity. We assessed whether a focal controlled cortical impact (CCI) TBI in the rat alters expression of the Tgfb1, c-Fos, Bdnf, and Gap43 neuroplasticity genes in lumbar spinal cord.Approach/Methods:Adult male Sprague-Dawley rats (n = 8) were subjected to a right-side CCI over the anterior sensorimotor hindlimb representation area or sham-injury (n = 8). Absolute expression levels of Tgfb1, c-Fos, Bdnf, and Gapd43 genes were measured by droplet digital PCR in ipsi-and contralesional, dorsal and ventral quadrants of the L4 and L5 spinal cord. The neuronal activity marker c-Fos was analysed by immunohistochemistry in the dorsal L4 and L5 segments. The contra- vs. ipsilesional expression pattern was examined as the asymmetry index, AI.

Focal traumatic brain injury induces neuroplastic molecular responses in lumbar spinal cord