Background: TGF-β has been described as a mediator of fibrosis and scarring. Several studies achieved reduction
in experimental scarring through the inhibition of TGF-β. Fibroblasts have been defined as the cell population
originating fibrosis, blocking fibroblast invasion may impair epidural fibrosis appearance. For this purpose,
biocompatible materials used as mechanical barriers and a TGF-β inhibitor peptide were evaluated in the reduction
of epidural fibrosis.
Methods: A L6 laminectomy was performed in 40 New Zealand white rabbits. Divided into four groups, each
rabbit was assigned to receive either collagen sponge scaffold (CS group), gelatin-based gel (GCP group), P144®
(iTGFβ group), or left untreated (control group). Four weeks after surgery, cell density, collagen content, and new
bone formation of the scar area were determined by histomorphometry. Two experienced pathologists scored dura
mater adhesion, scar density, and inflammatory infiltrate in a blinded manner.
Results: In all groups, laminectomy site was filled with fibrous tissue and the dura mater presented adhesions. Only
GCP group presented a significant reduction in collagen content and scar density.
Conclusion: GCP treatment reduces epidural fibrosis although did not prevent dura mater adhesion completely
