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Journal Article
Research Support, Non-U.S. Gov't
Effect of topical application of mitomycin-C on wound healing in a postlaminectomy rat model: an experimental study.
European Journal of Pharmacology 2012 January 6
The aim of this study was to investigate the effects of topical application mitomycin-C (MMC) on wound healing after laminectomy. 60 adult male SD rats were equally and randomly divided into five groups. Laminectomy was performed at the level of L1 in all rats. After hemostasis was achieved, cotton pads soaked with saline and MMC (0.1mg/ml, 0.3mg/ml, 0.5mg/ml and 0.7mg/ml) were directly subjected to the exposed dura for 5min in each group. Two weeks after laminectomy all the rats were killed. The vertebral column including the back scar tissue and muscles was obtained to make paraffin sections. The hematoxylin-eosin staining and Masson staining were performed with the obtained paraffin sections. The number of the fibroblast and the capillary density were counted by the hematoxylin-eosin staining slice. The extent of epidural fibrosis and the expression of vascular endothelial growth factor (VEGF) were evaluated by the immunohistochemical slice through a computer image analysis system. Our data showed that the number of fibroblast, capillary density and fibrotic tissue in the 0.5 and 0.7mg/ml MMC groups was significantly lower than the control, 0.1 and 0.3mg/ml MMC groups; while the expression of VEGF in control and 0.1mg/ml MMC groups was notably higher than 0.3, 0.5 and 0.7mg/ml MMC groups. Topical application of MMC above the concentration of 0.3mg/ml could affect all steps of the wound healing process via inhibiting the angiogenesis and fibroblast proliferation, thus delayed the wound healing after laminectomy.
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