Cell Electroporation Mechanisms and Preclinical Foundation for Focal Therapy
Abstract
Irreversible electroporation (IRE) is a novel, nonthermal, minimally invasive ablation technique which employs short electrical pulses between electrode pairs that have been placed into targeted tissue. IRE results in increased permeability of cell membranes within the targeted tissue resulting in cell death through a loss of homeostasis due to the creation of permanent pores in the membranes. A detailed discussion of the effects of increased transmembrane potentials on the disruption of lipid bilayers is provided. Significant preclinical work in focal prostate ablation in canine prostates has been performed to date in which the safety and feasibility of this ablation modality has been validated. Several histopathological staining techniques and scanning electron microscopy (SEM) imaging have been successfully employed to ascertain the outcome of the various preclinical studies conducted with IRE in prostatic and other tissues. Preclinical data is also provided for preservation of critical structures such as neurovascular bundles, blood vessels, and the urethra. A favorable safety and side-effect profile has emerged in which animals survive ablation procedures, recover well, and remain potent post-ablation.
Keywords
Electric Field Strength Electric Field Distribution Radio Frequency Ablation Pancuronium Bromide Histiocytic SarcomaNotes
Acknowledgements
The authors acknowledge Dr. Paulo A. Garcia and Chris Arena for help with technical editing of the manuscript and generation of figures. In addition, Rafael Davalos acknowledges the NSF CAREER (CBET 1055913) and the Virginia Tech Institute for Critical Technologies and Applied Sciences (ICTAS) for support of the modeling effort described in the manuscript, and Mark Ortiz acknowledges Dr. Edward Lee of UCLA Radiology for providing SEM images and H&E histopathology information.
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