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Electroconductive poly(3,4‑ethylenedioxythiophene) (PEDOT) nanoparticle‑loaded silk fibroin biocomposite conduits for peripheral nerve regeneration
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Date
2023
Abstract
Peripheral nerve injury (PNI) often clinically relies on the use of nerve grafts taken from the patient to establish a therapeutic effect, though secondary site of injury and morbidity have prompted the medical community to find alternative solutions. A new trend in the development of biomaterials arises in the form of electro-conductive biomaterials, especially for electrically active tissues such as the peripheral nerves. In this work, novel poly(3,4-ethylenedioxythiophene) PEDOT nanoparticles (PEDOT NPs) were synthetized via the mini-emulsion method and were combined with silk fbroin (SF) to create conduits for PNI repair. The synthesized PEDOT NPs-loaded SF conduits showed optimal properties for peripheral nerve substitution from the physico-chemical and biological point of view. They displayed excellent mechanical and conductivity performance with the tensile moduli reaching 6.61±0.55 MPa and the conduits reaching 5.4 · 10–4 S cm−1, respectively. The conduits did not possess apatite-forming capacity, which were resistant to bending occlusions for angles up to 50° and to suturing. The developed conduits are promising as a novel biomaterial for applications in peripheral nerve regeneration; in vitro experiments showed that they did not allow BJ fbroblast infltration, avoiding scar tissue formation in the lumen, and they did not show any toxic effect for Schwann cells.
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Publisher
Springer
Citation
Advanced Composites and Hybrid Materials 6, 118
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Funding Information
NanOptoNerv (ref. PTDC/NAN MAT/29936/2017), the European Commission and FEDER program under the JUSTHera project (NORTE-01-0145-FEDER-000055) and the 0624_2IQBIONEURO_6_E project (Inter-regional cooperation program VA Spain-Portugal POCTEP 2014–2020)