Abstract
Spinal cord injury is one of most serious complications when there is spine injury in patients. Spinal cord injury clinically involves anesthesia and mobility loss in leg in most of patients. Rats were herein molded and divided into groups, and Basso-Beattie-Bresnahan (BBB) method was adopted to assess the motor function of rats. The quantities of cassyl aspartic acid-specified protease (Caspase-3), neurofilament protein-200 (NF-200) and Glial Fibrillary Acidic Protein (GFAP)-positive cell were detected by immunohistochemical staining method. The expression of Glial cell line-derived neurotropic growth factor (GDNF) mRNA in spinal cord tissue was detected by Reverse Transcription-Polymerase Chain Reaction (RT-PCR) method. The quantity of Caspase-3 positive cell and area of glial scar in the fiber grating laser-National Security (FGL-NS) group were significantly reduced compared with those from the other two groups. The quantities of NF-200 positive cell, graded result of Basso-Beattie-Bresnahan method and content of GDNF mRNA in the FGL-NS group were increased compared to those from the other two groups. The FGL-NS improved the expression of GDNF mRNA so as to repair the damaged neuronal cells.
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