Peripheral nerve regeneration through biodegradable conduits prepared using solvent evaporation.
The present study explored a new approach to the production of tubular conduits designed for peripheral nerve repair. Poly(L-lactic acid) (PLLA) and polycaprolactone (PCL) membranes were obtained after solvent evaporation and wrapped around a mandrel. The effectiveness of nerve regeneration was compared with that obtained with polyethylene and PCL extruded prostheses 30 and 60 days after surgery. The comparison between extruded and membrane-derived tubes clearly showed structural differences that were directly proportional to the hardness and transparency. An important factor to be considered is that the fiber count indicated that membrane-derived PCL tubes provided a significantly greater number of axons 30 days after repair. Sixty days after the procedure, the greatest regenerative performance was obtained with PCL, regardless of tube construction method. An intense imunolabeling of S100, type IV collagen, and laminin could be observed in the tissue obtained from membrane-derived PCL and PLLA groups, indicating that such constructs were able to positively stimulate Schwann cell responses. Overall, the results provided evidence that membrane-derived conduits are an alternative preparation method for tubular prostheses for peripheral nerve regeneration.
Pierucci
Amauri
A
Department of Anatomy, Institute of Biology, State University of Campinas, Campinas, SP, Brazil.
de Duek
Eliana Aparecida Rezende
EA
de Oliveira
Alexandre Leite Rodrigues
AL
D020341:Absorbable Implants; D000818:Animals; D001369:Axons / Q000502:physiology / Q000648:ultrastructure; D001485:Basement Membrane / Q000648:ultrastructure; D001672:Biocompatible Materials; D005260:Female; D007150:Immunohistochemistry; D019344:Lactic Acid; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D009416:Nerve Regeneration; D059348:Peripheral Nerve Injuries; D010525:Peripheral Nerves / Q000502:physiology / Q000601:surgery* / Q000648:ultrastructure; D011091:Polyesters; D011108:Polymers; D051381:Rats; D017207:Rats, Sprague-Dawley; D012583:Schwann Cells / Q000648:ultrastructure; D012997:Solvents; D013997:Time Factors; D023822:Tissue Engineering / Q000379:methods; D054457:Tissue Scaffolds
D001672:Biocompatible Materials; D011091:Polyesters; D011108:Polymers; D012997:Solvents; C016240:polycaprolactone; D019344:Lactic Acid; C033616:poly(lactide)