Rahim Mohammadi,Hadi Heydarian,Keyvan Amini.[J].Chin J Traumatol,2014,17(1):12-18. [doi]

Effect of local administration of cyclosporine A on peripheral nerve regeneration in a rat sciatic nerve transection model

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KeyWord: Peripheral nerves Regeneration Cyclosporine Chitosan

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Author Name	Affiliation
Rahim Mohammadi	Department of Clinical Sciences, Faculty of Veterinary Medicine, Urmia University, Urmia 57153-1177, Iran
Hadi Heydarian	Department of Clinical Sciences, Faculty of Veterinary Medicine, Islamic Azad University, Urmia 57159-44867, Iran
Keyvan Amini	Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B4, Canada

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Abstract:

Objective: To assess the effect of cyclosporine A (CsA) loaded in chitosan conduit on bridging the sciatic nerve defects in a rat model. Methods: A 10 mm sciatic nerve defect was bridged using a chitosan conduit filled with 10 µl carrier-drug dilution (10 µg/L CsA). In control group, the conduit was filled with the same volume of carrier dilution alone. The regenerated fibers were studied 4, 8 and 12 weeks after surgery. Results: The functional study confirmed faster recovery of the regenerated axons in treatment group than control group (P<0.05). There was statistically significant difference of the gastrocnemius muscle weight ratios between treatment and control groups (P<0.05). Morphometric indices of regenerated fibers showed that the number and diameter of the myelinated fibers in CsA-treated animals were significantly higher than those in control group. In immunohistochemistry, the location of reactions to S-100 in CsA group was clearly more positive than control group. Conclusion: CsA loaded in a chitosan conduit results in improvement of functional recovery and quantitative morphometric indices of sciatic nerve. It is easily available without any complications compared with its systemic administration.

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