14 March 2016 : Animal Research
Pentoxifylline Inhibits Epidural Fibrosis in Post-Laminectomy Rats
Bilal KeltenABEFG, Hakan ErdoganADEF, Veysel AntarBE, Selim SanelBE, Matem TuncdemirCEF, Muge KutnuBC, Alper KaraoglanAEF, Tulay OrkiFDOI: 10.12659/MSM.897668
Med Sci Monit 2016; 22:840-847
Abstract
BACKGROUND: The aim of this experimental study was to investigate the effectiveness of intramuscular pentoxifylline in the prevention of postoperative fibrosis.
MATERIAL AND METHODS: We divided 16 adult Wistar albino rats into 2 equal groups: treatment and control. Both groups underwent L1 vertebral total laminectomy to expose the dura. The intramuscular treatment group received pentoxifylline. Four weeks later, epidural fibrosis was studied in both groups using electron microscopy, light microscopy, histology, biochemistry, and macroscopy.
RESULTS: The evaluation of epidural fibrosis in the 2 groups according to macroscopic (p<0.01) assessment and light microscopy revealed that epidural scar tissue formation was lower in the treatment group compared to the control group (p<0.001) and the number of fibroblasts was also decreased significantly in the pentoxifylline-treated group (p<0.05). More immature fibers were demonstrated in the treatment group by electron microscopy in comparison with the control group. In biochemical analysis, a statistically significant decrease was detected in hydroxyproline, which indicates fibrosis and myeloperoxidase activity, and shows an inflammatory response (P<0.001).
CONCLUSIONS: Systemic pentoxifylline application prevents postoperative epidural fibrosis and adhesions with various mechanisms. Our study is the first to present evidence of experimental epidural fibrosis prevention with pentoxifylline.
Keywords: Epidural Space - pathology, Fibroblasts - ultrastructure, Fibrosis, Hydroxyproline - metabolism, Laminectomy - adverse effects, Pentoxifylline - pharmacology, Peroxidase - metabolism, Rats, Wistar
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