Differences in the characteristics of fibrosis scar formation after spinal cord injury in different segments

After spinal cord injury, fibrotic scars will form, which affect tissue regeneration and functional recovery in the body. However, the differences in fibrotic scars produced by different segments of the spinal cord are still unclear. Here, we demonstrate that after the same spinal cord hemisection injury, the thoracic spinal cord produces the most scars, while the lumbar and cervical spinal cords have fewer scars, and there are also significant differences in functional recovery after injury in the three segments. By comparing the differences in fibrosis scars produced by cervical spinal cord, thoracic spinal cord, and lumbar spinal cord, as well as the different abilities of fibroblasts to promote fibrosis in vitro, the potential mechanism characteristics of injury repair in different segments of the spinal cord were revealed. This article explores the impact of spinal cord segment differences on fibrosis scar formation and their relationship with behavioral functional recovery, revealing the regional heterogeneity of spinal cord tissue fibrosis scar formation and deepening our understanding of the complexity of CNS scar formation. This provides new ideas for future targeted treatment to improve functional recovery after specific spinal cord injuries.