Abstract
Previously published work has demonstrated that combining gemcitabine with irreversible electroporation (IRE) results in increased drug delivery to pancreatic adenocarcinoma cells in vivo. This study assessed the efficacy of IRE + gemcitabine and IRE + FOLFIRINOX (5-fluorouracil, leucovorin, irinotecan, and oxaliplatin), the impact of the superior regimen on survival, and the safety of electrochemotherapy in human subjects. Histologic analysis was performed after in vitro and in vivo treatment of S2013 and Panc-1 pancreatic cancer cells and S2013 orthotopic tumors, respectively, and levels of apoptotic machinery and cell cycle proteins were evaluated using quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) and Western blot. Electrochemotherapy (ECT) with IRE and FOLFIRINOX resulted in increased tumor cells apoptosis compared with gemcitabine, gemcitabine + IRE, and FOLFIRINOX alone, and significantly improved overall survival when compared with mice treated with IRE or FOLFIRINOX. Increased tumor cell apoptosis, caspase-3 mRNA, active caspase-3 protein, and decreased cell proliferation were noted at the time of death or euthanasia in the ECT group compared with folinic acid alone. In five patients, ECT with ...Continue Reading
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