Optimizing Integrated Electrode Design for Irreversible Electroporation of Implanted Polymer Scaffolds

Francisco Pelaez, Qi Shao, Pegah Ranjbartehrani, Tiffany Lam, Hak Rae Lee, Stephen O’Flanagan, Abby Silbaugh, John C. Bischof, Samira M. Azarin

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Irreversible electroporation (IRE) is an emerging technology for non-thermal ablation of solid tumors. This study sought to integrate electrodes into microporous poly(caprolactone) (PCL) scaffolds previously shown to recruit metastasizing cancer cells in vivo in order to facilitate application of IRE to disseminating cancer cells. As the ideal parallel plate geometry would render much of the porous scaffold surface inaccessible to infiltrating cells, numerical modeling was utilized to predict the spatial profile of electric field strength within the scaffold for alternative electrode designs. Metal mesh electrodes with 0.35 mm aperture and 0.16 mm wire diameter established electric fields with similar spatial uniformity as the parallel plate geometry. Composite PCL-IRE scaffolds were fabricated by placing cylindrical porous PCL scaffolds between two PCL dip-coated stainless steel wire meshes. PCL-IRE scaffolds exhibited no difference in cell infiltration in vivo compared to PCL scaffolds. In addition, upon application of IRE in vivo, cells infiltrating the PCL-IRE scaffolds were successfully ablated, as determined by histological analysis 3 days post-treatment. The ability to establish homogeneous electric fields within a biomaterial that can recruit metastatic cancer cells, especially when combined with immunotherapy, may further advance IRE technology beyond solid tumors to the treatment of systemic cancer.

Original languageEnglish (US)
Pages (from-to)1230-1240
Number of pages11
JournalAnnals of Biomedical Engineering
Volume48
Issue number4
DOIs
StatePublished - Apr 1 2020

Keywords

  • Cancer therapy
  • Composite scaffold
  • Irreversible electroporation
  • Melanoma
  • Numerical modeling

PubMed: MeSH publication types

  • Journal Article

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