Testing of a promising gel for the prevention of epidural fibrosis in an experiment on a laminectomy model

Surgical treatment of spinal diseases is often complicated by epidural fibrosis, which is one of the main causes of failed back surgery syndrome. The aim . To evaluate the laminectomy zone and transformation of epidural fibrosis using original gels in an experiment. Materials and methods . Laminectomy was performed on male Wistar rats. The animals were divided into four groups. The original gels were tested. The group of intact (unoperated) rats served as a comparison group for the control and groups with the tested gels, carrying and not carrying the p38 MAP kinase blocker. On day 28, the deformation of the dural sac was assessed by measuring the transverse and longitudinal sections of the spinal canal, also the adhesion of the spinal roots to the inner layer of the dura mater in epidural fibrosis and its coverage with connective tissue along the perimeter of the laminectomy window were determined. Results . In the control group, the pronounced deformation ofthe dural sac was observed. The use of all the studied gels reduced the deformation, bringing the shape ofthe dural sac closer to the norm. However, the gel with the p38 MAP kinase blocker significantly reduced the adhesion of the spinal roots to the dura mater. Conclusion . For the first time, a pharmaceutical composition containing a p38 MAP kinase blocker was used andstudied ona laminectomy model forthe prevention of epidural fibrosis, and the relationships between the transformation and change in the shape of the dural sac with an assessment of the involvement of the dura mater in the formation of epidural fibrosis were presented. The results obtained show that a gel with a p38 MAP kinase blocker is more effective for the prevention of epidural fibrosis than a gel without a blocker.