Spinal Cord Contusion in Rats Treated with Systemic Hypothermia. Experimental Cold-inducible Protein Expression
Abstract
Introduction: Traumatic spinal cord injury is the leading cause of motor disability worldwide, and the WHO considers it a priority. This study sought to investigate the effects of therapeutic hypothermia following spinal cord contusion. Materials and Methods: Male rats that underwent experimental spinal cord contusion were used. For this purpose, four experimental groups were created (n=6 per group): a) control, b) lesion in normothermia (24°C, sacrificed 12h after the injury), c) lesion in normothermia (24°C, sacrificed 24h after the injury), and d) hypothermic injury (8°C for 180 min, sacrificed 24h after the injury). The expression of coldinducible RNA-binding protein (CIRBP), Caspase-3, and NeuN was studied. Results: At 24 hours, spinal cord damage raised CIRBP expression slightly while also increasing Caspase-3 significantly. All of this was accompanied by images of damaged motor neurons in the anterior horn. In animals treated with hypothermia, high expression of CIRBP and very low levels of Caspase-3 were observed, which were indistinguishable from controls. Furthermore, the number of viable motor neurons was partially restored. Conclusions: The experimental model developed in this study was effective at inducing spinal cord injury, demonstrating neuronal protection through hypothermia. The increased expression of CIRBP in the spinal cord of rats with injury and hypothermic treatment when compared to the normothermic group suggests the possibility of using substances that increase CIRBP as therapies for the treatment of contusive spinal cord injuries.Downloads
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