4.6 Review

Electroporation and Immunotherapy-Unleashing the Abscopal Effect

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CANCERS
卷 14, 期 12, 页码 -

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MDPI
DOI: 10.3390/cancers14122876

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electrochemotherapy; irreversible electroporation; immunotherapy; immune response; abscopal effect

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This article introduces the immune response induced by electroporation and the impact on the immune system, as well as discusses the results of clinical and preclinical trials investigating the combination of electroporation modalities and immunotherapy. The potential of combining electrochemotherapy and irreversible electroporation with immunotherapy in cancer treatment is promising and may change the current treatment approaches for tumors with low immunogenicity and high levels of immunosuppression.
Simple Summary Electrochemotherapy and irreversible electroporation are primarily used for treating patients with cutaneous and subcutaneous tumors and pancreatic cancer, respectively. Increasing numbers of studies have shown that the treatments may elicit an immune response in addition to eliminating the tumor cells. The purpose of this review is to give an in-depth introduction to the electroporation-induced immune response and the local and peripheral immune systems, and to describe the various studies investigating the combination of electroporation and immunotherapy. The review may help guide and inspire the design of future clinical trials investigating the potential synergy of electroporation and immunotherapy in cancer treatment. The discovery of electroporation in 1968 has led to the development of electrochemotherapy (ECT) and irreversible electroporation (IRE). ECT and IRE have been established as treatments of cutaneous and subcutaneous tumors and locally advanced pancreatic cancer, respectively. Interestingly, the treatment modalities have been shown to elicit immunogenic cell death, which in turn can induce an immune response towards the tumor cells. With the dawn of the immunotherapy era, the potential of combining ECT and IRE with immunotherapy has led to the launch of numerous studies. Data from the first clinical trials are promising, and new combination regimes might change the way we treat tumors characterized by low immunogenicity and high levels of immunosuppression, such as melanoma and pancreatic cancer. In this review we will give an introduction to ECT and IRE and discuss the impact on the immune system. Additionally, we will present the results of clinical and preclinical trials, investigating the combination of electroporation modalities and immunotherapy.

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