All-Polymer Printed Low-Cost Regenerative Nerve Cuff Electrodes

Laura M. Ferrari, Bruno Rodríguez-Meana, Alberto Bonisoli, Annarita Cutrone, Silvestro Micera, Xavier Navarro, Francesco Greco*, Jaume del Valle*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Neural regeneration after lesions is still limited by several factors and new technologies are developed to address this issue. Here, we present and test in animal models a new regenerative nerve cuff electrode (RnCE). It is based on a novel low-cost fabrication strategy, called “Print and Shrink”, which combines the inkjet printing of a conducting polymer with a heat-shrinkable polymer substrate for the development of a bioelectronic interface. This method allows to produce miniaturized regenerative cuff electrodes without the use of cleanroom facilities and vacuum based deposition methods, thus highly reducing the production costs. To fully proof the electrodes performance in vivo we assessed functional recovery and adequacy to support axonal regeneration after section of rat sciatic nerves and repair with RnCE. We investigated the possibility to stimulate the nerve to activate different muscles, both in acute and chronic scenarios. Three months after implantation, RnCEs were able to stimulate regenerated motor axons and induce a muscular response. The capability to produce fully-transparent nerve interfaces provided with polymeric microelectrodes through a cost-effective manufacturing process is an unexplored approach in neuroprosthesis field. Our findings pave the way to the development of new and more usable technologies for nerve regeneration and neuromodulation.

Original languageEnglish
Article number615218
JournalFrontiers in Bioengineering and Biotechnology
Volume9
DOIs
Publication statusPublished - 10 Feb 2021

Keywords

  • inkjet printing
  • low-cost fabrication
  • organic bioelectronics
  • PEDOT:PSS
  • peripheral nerve interfaces
  • regenerative cuff electrodes
  • wrinkling

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Histology
  • Biomedical Engineering

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