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Coil-reinforced hydrogel tubes promote nerve regeneration equivalent to that of nerve autografts

Paper ID Volume ID Publish Year Pages File Format Full-Text
11813 759 2006 14 PDF Available
Title
Coil-reinforced hydrogel tubes promote nerve regeneration equivalent to that of nerve autografts
Abstract

Despite spontaneous sprouting of peripheral axons after transection injury, peripheral regeneration is incomplete and limited to short gaps, even with the use of autograft tissue, which is considered to be the “gold” standard. In an attempt to obviate some of the problems associated with autografts, including limited donor tissue and donor site morbidity, we aimed to synthesize a synthetic nerve guidance channel that would perform as well as the nerve autograft. Given that the patency of the nerve guidance channel is critical for repair, we investigated a series of nerve guidance channel designs where patency and the resulting regenerative capacity were compared in a transected rat sciatic nerve injury model. Three tube designs were compared to autograft tissue: plain, corrugated and coil-reinforced tubes of poly(2-hydroxyethyl methacrylate-co-methyl methacrylate). Of the three designs, the coil-reinforced tubes demonstrated superior performance in terms of patency. By electrophysiology and histomorphometry, the coil-reinforced tubes demonstrated outcomes that were comparable to autografts after both 8 and 16 weeks of implantation. The nerve action potential (NAP) velocity and muscle action potential (MAP) velocity for the coil-reinforced PHEMA-MMA tube was 54.6±10.1 and 10.9±1.3 m/s, respectively at 16 weeks, which was statistically equivalent to those of the autograft at 37.5±7.9 and 11.3±2.0 m/s. The axon density in the coil-reinforced tube was 2.16±0.61×104 axons/mm2, which was statistically similar to that of the autograft of 2.41±0.62×104 axons/mm2 at 16 weeks. These coil-reinforced tubes demonstrated equivalence to autografts for nerve regeneration, demonstrating the importance of channel design to regenerative capacity and more specifically the impact of patency to regeneration.

Keywords
Peripheral nerve regeneration; PHEMA; Patency; Tissue engineering
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Coil-reinforced hydrogel tubes promote nerve regeneration equivalent to that of nerve autografts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 27, Issue 3, January 2006, Pages 505–518
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us