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Malyško-Ptašinskė V, Nemeikaitė-Čėnienė A, Radzevičiūtė-Valčiukė E, Mickevičiūtė E, Malakauskaitė P, Lekešytė B, Novickij V. Threshold Interphase Delay for Bipolar Pulses to Prevent Cancellation Phenomenon during Electrochemotherapy. Int J Mol Sci 2024; 25:8774. [PMID: 39201461 PMCID: PMC11354671 DOI: 10.3390/ijms25168774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Revised: 08/05/2024] [Accepted: 08/08/2024] [Indexed: 09/02/2024] Open
Abstract
Electroporation-based procedures employing nanosecond bipolar pulses are commonly linked to an undesirable phenomenon known as the cancelation effect. The cancellation effect arises when the second pulse partially or completely neutralizes the effects of the first pulse, simultaneously diminishing cells' plasma membrane permeabilization and the overall efficiency of the procedure. Introducing a temporal gap between the positive and negative phases of the bipolar pulses during electroporation procedures may help to overcome the cancellation phenomenon; however, the exact thresholds are not yet known. Therefore, in this work, we have tested the influence of different interphase delay values (from 0 ms to 95 ms) using symmetric bipolar nanoseconds (300 and 500 ns) on cell permeabilization using 10 Hz, 100 Hz, and 1 kHz protocols. As a model mouse hepatoma, the MH-22a cell line was employed. Additionally, we conducted in vitro electrochemotherapy with cisplatin, employing reduced interphase delay values (0 ms and 0.1 ms) at 10 Hz. Cell plasma membrane permeabilization and viability dependence on a variety of bipolar pulsed electric field protocols were characterized. It was shown that it is possible to minimize bipolar cancellation, enabling treatment efficiency comparable to monophasic pulses with identical parameters. At the same time, it was highlighted that bipolar cancellation has a significant influence on permeabilization, while the effects on the outcome of electrochemotherapy are minimal.
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Affiliation(s)
- Veronika Malyško-Ptašinskė
- Faculty of Electronics, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania; (E.R.-V.); (E.M.); (P.M.); (B.L.)
| | - Aušra Nemeikaitė-Čėnienė
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre of Innovative Medicine, 08406 Vilnius, Lithuania;
| | - Eivina Radzevičiūtė-Valčiukė
- Faculty of Electronics, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania; (E.R.-V.); (E.M.); (P.M.); (B.L.)
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre of Innovative Medicine, 08406 Vilnius, Lithuania;
| | - Eglė Mickevičiūtė
- Faculty of Electronics, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania; (E.R.-V.); (E.M.); (P.M.); (B.L.)
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre of Innovative Medicine, 08406 Vilnius, Lithuania;
| | - Paulina Malakauskaitė
- Faculty of Electronics, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania; (E.R.-V.); (E.M.); (P.M.); (B.L.)
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre of Innovative Medicine, 08406 Vilnius, Lithuania;
| | - Barbora Lekešytė
- Faculty of Electronics, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania; (E.R.-V.); (E.M.); (P.M.); (B.L.)
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre of Innovative Medicine, 08406 Vilnius, Lithuania;
| | - Vitalij Novickij
- Faculty of Electronics, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania; (E.R.-V.); (E.M.); (P.M.); (B.L.)
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre of Innovative Medicine, 08406 Vilnius, Lithuania;
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Musso G, Pinach S, Saba F, De Michieli F, Cassader M, Gambino R. Endoscopic duodenal mucosa ablation techniques for diabetes and nonalcoholic fatty liver disease: A systematic review. MED 2024; 5:735-758.e2. [PMID: 38579730 DOI: 10.1016/j.medj.2024.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/12/2024] [Accepted: 03/14/2024] [Indexed: 04/07/2024]
Abstract
BACKGROUND Type 2 diabetes mellitus (T2DM) is increasing at an alarming rate, and only 50% of patients with T2DM achieve or maintain adequate glycemic control with pharmacological therapies. Metabolic surgery demonstrated superior efficacy compared to medical therapy but is unfeasible for most patients with T2DM. Duodenal mucosal resurfacing (DMR) by hydrothermal mucosal ablation, recellularization via electroporation therapy (ReCET), and photodynamic therapy are novel endoscopic procedures that use thermal, electrical, and photochemical energy, respectively, to ablate and reset dysfunctional duodenal mucosa. We assessed the data on the effects of these techniques on glycemic control and nonalcoholic fatty liver disease (NAFLD). METHODS We systematically searched independently and in duplicate English and non-English language publications through January 31st, 2024. Outcomes assessed were an improvement in different metabolic health parameters and the safety of duodenal mucosal ablation (DMA) procedures. Outcomes were presented descriptively. FINDINGS We selected 12 reports reporting results from 3 randomized and 6 uncontrolled trials (seven evaluating DMR, two evaluating ReCET, all with a low risk of bias) for a total of 317 patients enrolled. DMA reduced HbA1c, fasting plasma glucose, and liver fat. When combined with newer antidiabetic drugs, it allowed insulin discontinuation in up to 86% patients. No major safety signal emerged. CONCLUSIONS All DMA techniques improve glucose homeostasis; DMR and ReCET appear to be safe in patients with T2DM. If confirmed by future randomized trials and by trials with histological endpoints in NAFLD, then DMA appears to be a promising alternative or complement option to medications for T2DM and NAFLD treatment. FUNDING This study received no funding.
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Affiliation(s)
- Giovanni Musso
- MECAU San Luigi Gonzaga Hospital, Orbassano, Turin, Italy.
| | - Silvia Pinach
- Department of Medical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Francesca Saba
- Department of Medical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Franco De Michieli
- Department of Medical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Maurizio Cassader
- Department of Medical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
| | - Roberto Gambino
- Department of Medical Sciences, Città della Salute e della Scienza, University of Turin, Turin, Italy
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Kranjc Brezar S. Transplantable Subcutaneous Tumor Models. Methods Mol Biol 2024; 2773:67-76. [PMID: 38236537 DOI: 10.1007/978-1-0716-3714-2_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Mouse tumor models are essential in cancer research, especially in elucidating malignancy, developing prevention, diagnosis, and new therapeutic approaches. Nowadays, due to standardized ways of maintaining animal colonies and the availability of mouse strains with known genetic backgrounds and approaches to reduce the variability of tumor size between animals, transplantable mouse tumor models can be widely used in translational cancer research. Here, we describe the induction of different subcutaneous tumor models in mice, in particular xenograft and syngeneic that can be used as experimental tumor models.
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Affiliation(s)
- Simona Kranjc Brezar
- Department of Experimental Oncology, Institute of Oncology, Ljubljana, Slovenia.
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Ferioli M, Perrone AM, Buwenge M, Arcelli A, Vadala’ M, Fionda B, Malato MC, De Iaco P, Zamagni C, Cammelli S, Tagliaferri L, Morganti AG. Combination of Electrochemotherapy with Radiotherapy: A Comprehensive, Systematic, PRISMA-Compliant Review of Efficacy and Potential Radiosensitizing Effects in Tumor Control. Curr Oncol 2023; 30:9895-9905. [PMID: 37999139 PMCID: PMC10670517 DOI: 10.3390/curroncol30110719] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 10/27/2023] [Accepted: 10/31/2023] [Indexed: 11/25/2023] Open
Abstract
Radiotherapy (RT) and electrochemotherapy (ECT) are established local treatments for cancer. While effective, both therapies have limitations, especially in treating bulky and poorly oxygenated tumors. ECT has emerged as a promising palliative treatment, raising interest in exploring its combination with RT to enhance tumor response. However, the potential benefits and challenges of combining these treatments remain unclear. A systematic review was conducted following PRISMA guidelines. PubMed, Scopus, and Cochrane libraries were searched. Studies were screened and selected based on predefined inclusion and exclusion criteria. Ten studies were included, comprising in vitro and in vivo experiments. Different tumor types were treated with ECT alone or in combination with RT. ECT plus RT demonstrated superior tumor response compared to that under single therapies or other combinations, regardless of the cytotoxic agent and RT dose. However, no study demonstrated a clear superadditive effect in cell survival curves, suggesting inconclusive evidence of specific ECT-induced radiosensitization. Toxicity data were limited. In conclusion, the combination of ECT and RT consistently improved tumor response compared to that with individual therapies, supporting the potential benefit of their combination. However, evidence for a specific ECT-induced radiosensitization effect is currently lacking. Additional investigations are necessary to elucidate the potential benefits of this combination therapy.
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Affiliation(s)
- Martina Ferioli
- Radiation Oncology, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy; (A.M.P.); (M.B.); (A.A.); (M.C.M.); (P.D.I.); (S.C.); (A.G.M.)
| | - Anna M. Perrone
- Radiation Oncology, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy; (A.M.P.); (M.B.); (A.A.); (M.C.M.); (P.D.I.); (S.C.); (A.G.M.)
- Division of Oncologic Gynaecology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Milly Buwenge
- Radiation Oncology, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy; (A.M.P.); (M.B.); (A.A.); (M.C.M.); (P.D.I.); (S.C.); (A.G.M.)
| | - Alessandra Arcelli
- Radiation Oncology, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy; (A.M.P.); (M.B.); (A.A.); (M.C.M.); (P.D.I.); (S.C.); (A.G.M.)
- Radiation Oncology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Maria Vadala’
- Nuclear Medicine, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy;
| | - Bruno Fionda
- Dipartimento di Diagnostica per Immagini, Radioterapia Oncologica ed Ematologia, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, UOC di Radioterapia Oncologica, 00168 Roma, Italy; (B.F.); (L.T.)
| | - Maria C. Malato
- Radiation Oncology, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy; (A.M.P.); (M.B.); (A.A.); (M.C.M.); (P.D.I.); (S.C.); (A.G.M.)
- Radiation Oncology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Pierandrea De Iaco
- Radiation Oncology, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy; (A.M.P.); (M.B.); (A.A.); (M.C.M.); (P.D.I.); (S.C.); (A.G.M.)
- Division of Oncologic Gynaecology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Claudio Zamagni
- Oncologia Medica Addarii, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy;
| | - Silvia Cammelli
- Radiation Oncology, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy; (A.M.P.); (M.B.); (A.A.); (M.C.M.); (P.D.I.); (S.C.); (A.G.M.)
- Radiation Oncology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Luca Tagliaferri
- Dipartimento di Diagnostica per Immagini, Radioterapia Oncologica ed Ematologia, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, UOC di Radioterapia Oncologica, 00168 Roma, Italy; (B.F.); (L.T.)
| | - Alessio G. Morganti
- Radiation Oncology, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy; (A.M.P.); (M.B.); (A.A.); (M.C.M.); (P.D.I.); (S.C.); (A.G.M.)
- Radiation Oncology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
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Campelo SN, Huang PH, Buie CR, Davalos RV. Recent Advancements in Electroporation Technologies: From Bench to Clinic. Annu Rev Biomed Eng 2023; 25:77-100. [PMID: 36854260 DOI: 10.1146/annurev-bioeng-110220-023800] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
Over the past decade, the increased adoption of electroporation-based technologies has led to an expansion of clinical research initiatives. Electroporation has been utilized in molecular biology for mammalian and bacterial transfection; for food sanitation; and in therapeutic settings to increase drug uptake, for gene therapy, and to eliminate cancerous tissues. We begin this article by discussing the biophysics required for understanding the concepts behind the cell permeation phenomenon that is electroporation. We then review nano- and microscale single-cell electroporation technologies before scaling up to emerging in vivo applications.
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Affiliation(s)
- Sabrina N Campelo
- Department of Biomedical Engineering and Mechanics, Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia, USA;
| | - Po-Hsun Huang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Cullen R Buie
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Rafael V Davalos
- Department of Biomedical Engineering and Mechanics, Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia, USA;
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High-Frequency Nanosecond Bleomycin Electrochemotherapy and its Effects on Changes in the Immune System and Survival. Cancers (Basel) 2022; 14:cancers14246254. [PMID: 36551739 PMCID: PMC9776811 DOI: 10.3390/cancers14246254] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/06/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022] Open
Abstract
In this work, a time-dependent and time-independent study on bleomycin-based high-frequency nsECT (3.5 kV/cm × 200 pulses) for the elimination of LLC1 tumours in C57BL/6J mice is performed. We show the efficiency of nsECT (200 ns and 700 ns delivered at 1 kHz and 1 MHz) for the elimination of tumours in mice and increase of their survival. The dynamics of the immunomodulatory effects were observed after electrochemotherapy by investigating immune cell populations and antitumour antibodies at different timepoints after the treatment. ECT treatment resulted in an increased percentage of CD4+ T, splenic memory B and tumour-associated dendritic cell subsets. Moreover, increased levels of antitumour IgG antibodies after ECT treatment were detected. Based on the time-dependent study results, nsECT treatment upregulated PD 1 expression on splenic CD4+ Tr1 cells, increased the expansion of splenic CD8+ T, CD4+CD8+ T, plasma cells and the proportion of tumour-associated pro inflammatory macrophages. The Lin- population of immune cells that was increased in the spleens and tumour after nsECT was identified. It was shown that nsECT prolonged survival of the treated mice and induced significant changes in the immune system, which shows a promising alliance of nanosecond electrochemotherapy and immunotherapy.
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Radzevičiūtė E, Malyško-Ptašinskė V, Kulbacka J, Rembiałkowska N, Novickij J, Girkontaitė I, Novickij V. Nanosecond electrochemotherapy using bleomycin or doxorubicin: Influence of pulse amplitude, duration and burst frequency. Bioelectrochemistry 2022; 148:108251. [DOI: 10.1016/j.bioelechem.2022.108251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/08/2022] [Accepted: 08/21/2022] [Indexed: 11/02/2022]
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Kraemer MM, Tsimpaki T, Berchner-Pfannschmidt U, Bechrakis NE, Seitz B, Fiorentzis M. Calcium Electroporation Reduces Viability and Proliferation Capacity of Four Uveal Melanoma Cell Lines in 2D and 3D Cultures. Cancers (Basel) 2022; 14:cancers14122889. [PMID: 35740554 PMCID: PMC9221408 DOI: 10.3390/cancers14122889] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/06/2022] [Accepted: 06/09/2022] [Indexed: 12/07/2022] Open
Abstract
Simple Summary Calcium electroporation (CaEP) is an innovative anti-tumor treatment modality that induces cell death by introducing supraphysiological concentrations of calcium into cells with a limited effect on normal cells. The objective of the present study is to assess the effect of CaEP in uveal melanoma (UM) cell lines in comparison to electrochemotherapy (ECT) with bleomycin using 2D monolayer cell cultures as well as 3D tumor spheroid models in four different UM cell lines. The morphological changes of the spheroids, the cell viability, growth rate as well as the cytotoxic effect of electroporation (EP) with calcium chloride and bleomycin were evaluated with various drug concentrations. The results of CaEP and ECT both suggest a comparable dose-dependent reduction in cell viability and proliferation rate in all tested 2D cell lines and 3D tumor spheroids. These data point out that CaEP is an established anticancer treatment causing cell death by ATP depletion in in vitro and in vivo, representing an efficient alternative therapy with a lower cytotoxic potency for the local UM tumor control. Abstract Electrochemotherapy (ECT) is the combination of transient pore formation following electric pulse application with the administration of cytotoxic drugs, which enhances the cytotoxic effect of the applied agent due to membrane changes and permeabilization. Although EP represents an established therapeutic option for solid malignancies, recent advances shift to the investigation of non-cytotoxic agents, such as calcium, which can also induce cell death. The present study aims to evaluate the cytotoxic effect, the morphological changes in tumor spheroids, the effect on the cell viability, and the cell-specific growth rate following calcium electroporation (CaEP) in uveal melanoma (UM) 2D monolayer cell cultures as well as in 3D tumor spheroid models. The experiments were conducted in four cell lines, UM92.1, Mel270, and two primary UM cell lines, UPMD2 and UPMM3 (UPM). The 2D and 3D UM cell cultures were electroporated with eight rectangular pulses (100 µs pulse duration, 5 Hz repetition frequency) of a 1000 V/cm pulse strength alone or in combination with 0.11 mg/mL, 0.28 mg/mL, 0.55 mg/mL or 1.11 mg/mL calcium chloride or 1.0 µg/mL or 2.5 µg/mL bleomycin. The application of calcium chloride alone induced an ATP reduction only in the UM92.1 2D cell cultures. Calcium alone had no significant effect on ATP levels in all four UM spheroids. A significant decrease in the intracellular adenosine triphosphate (ATP) level was documented in all four 2D and 3D cell cultures for both CaEP as well as ECT with bleomycin. The results suggest a dose-dependent ATP depletion with a wide range of sensitivity among the tested UM cell lines, control groups, and the applied settings in both 2D monolayer cell cultures and 3D tumor spheroid models. The colony formation capacity of the cell lines after two weeks reduced significantly after CaEP only with 0.5 mg/mL and 1.1 mg/mL, whereas the same effect could be achieved with both applied bleomycin concentrations, 1.0 µg/mL and 2.5 µg/mL, for the ECT group. The specific growth rate on day 7 following CaEP was significantly reduced in UM92.1 cell lines with 0.5 and 1.1 mg/mL calcium chloride, while Mel270 showed a similar effect only after administration of 1.1 mg/mL. UM92.1 and Mel270 spheroids exhibited lower adhesion and density after CaEP on day three in comparison to UPM spheroids showing detachment after day 7 following treatment. CaEP and bleomycin electroporation significantly reduce cell viability at similar applied voltage settings. CaEP may be a feasible and inexpensive therapeutic option for the local tumor control with fewer side effects, in comparison to other chemotherapeutic agents, for the treatment of uveal melanoma. The limited effect on normal cells and the surrounding tissue has already been investigated, but further research is necessary to clarify the effect on the surrounding tissue and to facilitate its application in a clinical setting for the eye.
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Affiliation(s)
- Miriam M. Kraemer
- Department of Ophthalmology, University Hospital Essen, University of Duisburg-Essen, Hufeland Str. 55, 45147 Essen, Germany; (M.M.K.); (T.T.); (U.B.-P.); (N.E.B.)
| | - Theodora Tsimpaki
- Department of Ophthalmology, University Hospital Essen, University of Duisburg-Essen, Hufeland Str. 55, 45147 Essen, Germany; (M.M.K.); (T.T.); (U.B.-P.); (N.E.B.)
| | - Utta Berchner-Pfannschmidt
- Department of Ophthalmology, University Hospital Essen, University of Duisburg-Essen, Hufeland Str. 55, 45147 Essen, Germany; (M.M.K.); (T.T.); (U.B.-P.); (N.E.B.)
| | - Nikolaos E. Bechrakis
- Department of Ophthalmology, University Hospital Essen, University of Duisburg-Essen, Hufeland Str. 55, 45147 Essen, Germany; (M.M.K.); (T.T.); (U.B.-P.); (N.E.B.)
| | - Berthold Seitz
- Department of Ophthalmology, Saarland University Medical Center, Kirrberger Str. 100, 66421 Homburg, Germany;
| | - Miltiadis Fiorentzis
- Department of Ophthalmology, University Hospital Essen, University of Duisburg-Essen, Hufeland Str. 55, 45147 Essen, Germany; (M.M.K.); (T.T.); (U.B.-P.); (N.E.B.)
- Correspondence: ; Tel.: +49-723-2900
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Maciulevičius M, Tamošiūnas M, Jurkonis R, Šatkauskas S. Dosimetric Assessment of Antitumor Treatment by enhanced Bleomycin Delivery via Electroporation and Sonoporation. Bioelectrochemistry 2022; 146:108153. [DOI: 10.1016/j.bioelechem.2022.108153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 04/15/2022] [Accepted: 05/02/2022] [Indexed: 11/26/2022]
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10
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Contrast-enhanced ultrasound for evaluation of tumor perfusion and outcome following treatment in a murine melanoma model. Bioelectrochemistry 2021; 142:107932. [PMID: 34474205 DOI: 10.1016/j.bioelechem.2021.107932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 08/10/2021] [Accepted: 08/13/2021] [Indexed: 11/24/2022]
Abstract
Due to a lack of data on predictors of electroporation-based treatment outcomes, we investigated the potential predictive role of contrast-enhanced harmonic ultrasound (CEUS) in mice B16F10 melanoma treated by gene electrotransfer (GET) to silence melanoma cell adhesion molecule (MCAM) and radiotherapy, which has not been evaluated yet. CEUS evaluation was verified by tumor histological analysis. Mice bearing subcutaneous tumors were treated with GET to silence MCAM, irradiation or the combination of GET to silence MCAM and irradiation (combined treatment). CEUS of the tumors used to evaluate tumor perfusion was performed before and up to 10 days after the beginning of the experiment, and the CEUS results were compared with tumor growth and the number of blood vessels analyzed in the histological tumor sections. CEUS revealed a decrease in tumor perfusion in the combined therapy groups compared with the control groups and correlated with tumor histological analyses, which showed a decreased vascular density. In this study a trend of inverse correlation was observed between tumor perfusion and treatment efficacy. The greater the perfusion of the tumor, the shorter the expected doubling time. Furthermore, decreased perfusion showed a trend to correlate with higher antitumor efficacy. Thus, CEUS could be used to predict tumoral vascular density and treatment effectiveness.
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Electrochemotherapy with Bleomycin Enhances Radiosensitivity of Uveal Melanomas: First In Vitro Results in 3D Cultures of Primary Uveal Melanoma Cell Lines. Cancers (Basel) 2021; 13:cancers13123086. [PMID: 34205625 PMCID: PMC8234387 DOI: 10.3390/cancers13123086] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 06/08/2021] [Accepted: 06/16/2021] [Indexed: 01/11/2023] Open
Abstract
Simple Summary Uveal melanoma (UM) is the most common primary intraocular tumor in adults. Treatment options for UM include radiotherapy, thermotherapy and tumor resection. Electrochemotherapy (ECT) is a new therapeutic modality for local tumor control in various cancer entities. The current study assesses the radiosensitizing effect of concomitant ECT with bleomycin and irradiation on 3D tumor spheroids with primary and radioresistant uveal melanoma cell lines. The evaluation of the radiosensitizing effect of ECT as a drug delivery system was based on the changes in the spheroid growth, the cell viability as well as the cytotoxic long-term effect of the combined treatment. The primary cell lines showed a higher radiosensitivity and required lower irradiation and bleomycin doses in comparison to cell lines originating from previously irratiated tumors. ECT should be further assessed for its applicability in clinical settings as a therapeutic radiosensitizing option for radioresistant tumors. Abstract Electrochemotherapy (ECT) is emerging as a complementary treatment modality for local tumor control in various cancer entities. Irradiation is an established therapeutic option for oncologic patients, which is commonly combined with chemotherapy due to its insufficient targeting ability. The efficiency of radiotherapy for tumors can be enhanced with different radiosensitizers. ECT can potentiate the radiosensitizing effect of chemotherapeutic agents such as bleomycin. The present study aims to evaluate the radiosensitizing effect of concomitant ECT with bleomycin on 3D tumor spheroids with primary and radioresistant uveal melanoma cell lines (UPMD2, UPMM3, UM92.1, Mel270) and irradiation. The changes in the spheroid growth and the cell viability as well the cytotoxic long-term effect of the combination treatment were evaluated with various combinations of electroporation settings and bleomycin concentrations as well as radiotherapy doses. A broad range of radiosensitivity was documented among the spheroids from different uveal melanoma cell lines. The primary cell lines showed a higher radiosensitivity and required lower irradiation and bleomycin doses. The maximal tumor control with a reduction of cell survival <10% was achieved with a 5 Gy irradiation only in the primary uveal melanoma cell lines and in combination with all tested ECT settings, whereas the same result could be obtained in UM92.1 spheroids only after ECT with 20 Gy irradiation. Based on the spheroid growth and the measurement of the cross-sectional area, the Mel270 spheroids, originating from a previously irradiated recurrent uveal melanoma, required higher doses of bleomycin and ECT settings after irradiation with 5 Gy in order to achieve a significant growth reduction. No significant difference could be demonstrated for the reduction of cell viability in the combination therapy with 20 Gy and 1000 V/cm between 1 and 2.5 µg/mL bleomycin even in Mel270 spheroids, underlying the importance of a drug delivery system to potentiate the radiosensitizing effect of agents in lower doses. ECT should be further assessed for its applicability in clinical settings as a therapeutic radiosensitizing option for radioresistant tumors and a sufficient local tumor control with lower chemotherapy and irradiation doses.
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Electrochemotherapy in the Treatment of Head and Neck Cancer: Current Conditions and Future Directions. Cancers (Basel) 2021; 13:cancers13061418. [PMID: 33808884 PMCID: PMC8003720 DOI: 10.3390/cancers13061418] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 02/15/2021] [Accepted: 02/16/2021] [Indexed: 12/15/2022] Open
Abstract
Simple Summary Electrochemotherapy (ECT) was first introduced in the late 1980s and was initially used mainly on cutaneous tumors. It has now evolved into a clinically verified treatment approach. Thanks to its high feasibility, it has been extended to treating mucosal and deep-seated tumors, including head and neck cancer (HNC) and in heavily pretreated settings. This review describes current knowledge and data on the use of ECT in various forms of HNCs across different clinical settings, with attention to future clinical and research perspectives. Abstract Despite recent advances in the development of chemotherapeutic drug, treatment for advanced cancer of the head and neck cancer (HNC) is still challenging. Options are limited by multiple factors, such as a prior history of irradiation to the tumor site as well as functional limitations. Against this background, electrochemotherapy (ECT) is a new modality which combines administration of an antineoplastic agent with locally applied electric pulses. These pulses allow the chemotherapeutic drug to penetrate the intracellular space of the tumor cells and thereby increase its cytotoxicity. ECT has shown encouraging efficacy and a tolerable safety profile in many clinical studies, including in heavily pre-treated HNC patients, and is considered a promising strategy. Efforts to improve its efficacy and broaden its application are now ongoing. Moreover, the combination of ECT with recently developed novel therapies, including immunotherapy, represented by immune checkpoint inhibitor (ICI)s, has attracted attention for its potent theoretical rationale. More extensive, well-organized clinical studies and timely updating of consensus guidelines will bring this hopeful treatment to HNC patients under challenging situations.
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Šilkūnas M, Bavirša M, Saulė R, Batiuškaitė D, Saulis G. To breathe or not to breathe? Hypoxia after pulsed-electric field treatment reduces the effectiveness of electrochemotherapy in vitro. Bioelectrochemistry 2020; 137:107636. [PMID: 32882444 DOI: 10.1016/j.bioelechem.2020.107636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Revised: 08/15/2020] [Accepted: 08/16/2020] [Indexed: 01/05/2023]
Abstract
Bleomycin, which is the most widely used drugs in electrochemotherapy, requires oxygen to be able to make single- or double-strand brakes in DNA. However, the concentration of oxygen in tumours can be lower than 1%. The aim of this study was to find out whether oxygen concentration in the medium in which cells loaded with bleomycin are incubated, affects the effectiveness of electrochemotherapy in vitro. Experiments were carried out on mouse hepatoma MH-22A cells. Cells were loaded with bleomycin by using a single square-wave electric pulse (2 kV/cm, 100 μs) under normoxic conditions, seeded into Petri dishes, and grown under normoxic and hypoxic conditions. Cell viability was determined by means of a colony-forming assay. We demonstrated that when cells loaded with bleomycin were incubated in hypoxia (0.2% O2), up to 5.3-fold higher concentrations of bleomycin were needed to kill them in comparison with cells grown in normoxia (18.7% O2).
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Affiliation(s)
- Mantas Šilkūnas
- Department of Biology, Faculty of Natural Sciences, Vytautas Magnus University, 8 Vileikos str., LT-44404 Kaunas, Lithuania.
| | - Mark Bavirša
- Department of Biology, Faculty of Natural Sciences, Vytautas Magnus University, 8 Vileikos str., LT-44404 Kaunas, Lithuania
| | - Rita Saulė
- Department of Biology, Faculty of Natural Sciences, Vytautas Magnus University, 8 Vileikos str., LT-44404 Kaunas, Lithuania
| | - Danutė Batiuškaitė
- Department of Biology, Faculty of Natural Sciences, Vytautas Magnus University, 8 Vileikos str., LT-44404 Kaunas, Lithuania
| | - Gintautas Saulis
- Department of Biology, Faculty of Natural Sciences, Vytautas Magnus University, 8 Vileikos str., LT-44404 Kaunas, Lithuania
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Lee JM, Choi HS, Kim ES, Keum B, Seo YS, Jeen YT, Lee HS, Chun HJ, Um SH, Kim CD, Kim HB. Characterization of irreversible electroporation on the stomach: A feasibility study in rats. Sci Rep 2019; 9:9094. [PMID: 31235753 PMCID: PMC6591231 DOI: 10.1038/s41598-019-45659-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 06/11/2019] [Indexed: 12/12/2022] Open
Abstract
Irreversible electroporation (IRE) is a newly developed non-thermal ablative therapy. During the IRE procedure, the permeability of the cell membrane is irreversibly changed by application of high-energy pulses across the tissue. This induces the breakdown of cell homeostasis, and thereby cell death. Here, we present an in vivo study to demonstrate IRE ablation of gastric tissue and characterize the changes that occur with time therein. No significant complications were observed in the test rats during the experiment. The electroporated tissues exhibited apoptosis at 10, 24 and 48 h after IRE ablation. The apoptosis peaked at 10 h after IRE and then declined, suggesting that the ablated tissue rapidly recovered owing to intense metabolic activity. In addition, the electroporated tissues exhibited morphological changes such as pyknosis and karyorrhexis, while histological analysis showed that the blood vessels were preserved. Interestingly, electroporation greatly affected the mucosa and muscularis propria, but not the submucosa and serosa. This study suggests that IRE could potentially be used as a minimally invasive treatment for early gastric cancer that does not exhibit lymph node metastasis or dysplasia.
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Affiliation(s)
- Jae Min Lee
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Hyuk Soon Choi
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea.
| | - Eun Sun Kim
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Bora Keum
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Yeon Seok Seo
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Yoon Tae Jeen
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Hong Sik Lee
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Hoon Jai Chun
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Soon Ho Um
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Chang Duck Kim
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, 02841, Republic of Korea
| | - Hong Bae Kim
- Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
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Campana LG, Edhemovic I, Soden D, Perrone AM, Scarpa M, Campanacci L, Cemazar M, Valpione S, Miklavčič D, Mocellin S, Sieni E, Sersa G. Electrochemotherapy - Emerging applications technical advances, new indications, combined approaches, and multi-institutional collaboration. Eur J Surg Oncol 2018; 45:92-102. [PMID: 30528893 DOI: 10.1016/j.ejso.2018.11.023] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 11/30/2018] [Indexed: 12/18/2022] Open
Abstract
The treatment of tumors with electrochemotherapy (ECT) has surged over the past decade. Thanks to the transient cell membrane permeabilization induced by the short electric pulses used by ECT, cancer cells are exposed to otherwise poorly permeant chemotherapy agents, with consequent increased cytotoxicity. The codification of the procedure in 2006 led to a broad diffusion of the procedure, mainly in Europe, and since then, the progressive clinical experience, together with the emerging technologies, have extended the range of its application. Herein, we review the key advances in the ECT field since the European Standard Operating Procedures on ECT (ESOPE) 2006 guidelines and discuss the emerging clinical data on the new ECT indications. First, technical developments have improved ECT equipment, with custom electrode probes and dedicated tools supporting individual treatment planning in anatomically challenging tumors. Second, the feasibility and short-term efficacy of ECT has been established in deep-seated tumors, including bone metastases, liver malignancies, and pancreatic and prostate cancers (long-needle variable electrode geometry ECT), and gastrointestinal tumors (endoscopic ECT). Moreover, pioneering studies indicate lung and brain tumors as suitable future targets. A further advance relates to new combination strategies with immunotherapy, gene electro transfer (GET), calcium EP, and radiotherapy. Finally and fourth, cross-institutional collaborative groups have been established to refine procedural guidelines, promote clinical research, and explore new indications.
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Affiliation(s)
- Luca G Campana
- Department of Surgery Oncology and Gastroenterology (DISCOG), University of Padua, Italy; Surgical Oncology, Veneto Institute of Oncology IOV-IRCCS, Padua, Italy.
| | - Ibrahim Edhemovic
- Department of Surgical Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | | | - Anna M Perrone
- Oncologic Gynecology Unit, Sant'Orsola-Malpighi Hospital, Bologna, Italy
| | - Marco Scarpa
- Surgical Oncology, Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - Laura Campanacci
- 3rd Orthopaedic and Traumatologic Clinic Prevalently Oncologic, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Maja Cemazar
- Department of Experimental Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Sara Valpione
- Christie NHS Foundation Trust, CRUK Manchester Institute, The University of Manchester, Manchester, M20 4GJ, UK
| | - Damijan Miklavčič
- University of Ljubljana, Faculty of Electrical Engineering, Ljubljana, Slovenia
| | - Simone Mocellin
- Department of Surgery Oncology and Gastroenterology (DISCOG), University of Padua, Italy; Surgical Oncology, Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - Elisabetta Sieni
- Department of Industrial Engineering, University of Padua, Italy
| | - Gregor Sersa
- Department of Experimental Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
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Rezaee Z, Yadollahpour A, Bayati V. Single Intense Microsecond Electric Pulse Induces Radiosensitization to Ionizing Radiation: Effects of Time Intervals Between Electric Pulse and Ionizing Irradiation. Front Oncol 2018; 8:418. [PMID: 30319980 PMCID: PMC6171481 DOI: 10.3389/fonc.2018.00418] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 09/10/2018] [Indexed: 12/16/2022] Open
Abstract
Background and Objective: Recent studies have shown the potential of electroporation (EP) as a physical radiosensitizer for ionizing radiation (IR). The amount of sensitizing effect depends on some factors the most important of them is the time interval between the EP and IR. This experimental in vitro study aims to investigate the radiosensitizing effect of EP exposure prior to IR and also evaluate the effects of EP-IR time intervals on the amount of radiosensitizing effects. Methods: Chinese hamster ovary (CHO) cell lines were cultured in vitro. The cells were divided into 10 groups including one untreated or control group, IR, and EP treatment alone groups, and seven combined EP-IR groups with 10, 20, 30, 40, 50, 60, and 70 min intervals. The dose enhancement factors (DEFs) for 6 MV X-rays IR were comparatively investigated between the groups using MTT assay. Results: The EP significantly induced radiosensitizing effect and its amount depends on the time intervals. The viability rate of the cells in the combined EP-IR treatment groups for intervals of 10, 20, 30, 40, and 50 min was significantly lower than the IR alone group. The highest DEF (1.18) was observed 10 min time interval between EP and IR. Conclusion: The radiosensitizing effects of EP persist long enough, 10–50 min, which allows safe application of EP as a radiosensitizer before IR in clinical setting.
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Affiliation(s)
- Zohre Rezaee
- Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Ali Yadollahpour
- Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Vahid Bayati
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Yadollahpour A, Rezaee Z, Bayati V, Tahmasebi Birgani MJ, Negad Dehbashi F. Radiotherapy Enhancement with Electroporation in Human Intestinal Colon Cancer HT-29 Cells. Asian Pac J Cancer Prev 2018; 19:1259-1262. [PMID: 29801410 PMCID: PMC6031833 DOI: 10.22034/apjcp.2018.19.5.1259] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Accepted: 04/16/2018] [Indexed: 02/05/2023] Open
Abstract
Background: The efficiency of radiotherapy for tumors can be enhanced with different radiosensitizers. Previous studies have shown that electroporation (EP) can sensitize some cancer cell lines to ionizing radiation (IR). HT-29 is a radiation resistant colorectal cancer cell line, representative of a cancer type which is the second cause of cancer mortalities in developed countries. The present study aimed to evaluate radiosensitizing effects of EP on HT-29 cells in vitro exposed to 6 MV X-ray photon beams. Methods: HT-29 cells were exposed to a 6 MV X-ray photon beam as the control or to a combination of electroporation and irradiation. The response of cells was evaluated by colony formation assay and survival curves. Results: The survival fraction of the HT-29 cells was significantly decreased by electroporation prior to radiotherapy. A single electric pulse increased colorectal HT-29 cancer cell sensitivity to megavoltage radiation by a factor of 1.36. Conclusion: Our findings showed that EP before radiotherapy can significantly enhance tumor cell sensitivity. This combined treatment modality should be assessed for its applicability in clinic settings for employment against radioresistant cancers. However, to facilitate achieving this goal, many different tumors with a broad range of radiosensitivities should be evaluated.
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Affiliation(s)
- Ali Yadollahpour
- Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
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18
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Groselj A, Kranjc S, Bosnjak M, Krzan M, Kosjek T, Prevc A, Cemazar M, Sersa G. Vascularization of the tumours affects the pharmacokinetics of bleomycin and the effectiveness of electrochemotherapy. Basic Clin Pharmacol Toxicol 2018; 123:247-256. [DOI: 10.1111/bcpt.13012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 03/12/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Ales Groselj
- Department of Otorhinolaryngology and Cervicofacial Surgery; University Medical Centre Ljubljana; Ljubljana Slovenia
- Faculty of Medicine; University of Ljubljana; Ljubljana Slovenia
| | - Simona Kranjc
- Department of Experimental Oncology; Institute of Oncology Ljubljana; Ljubljana Slovenia
| | - Masa Bosnjak
- Department of Experimental Oncology; Institute of Oncology Ljubljana; Ljubljana Slovenia
| | - Mojca Krzan
- Faculty of Medicine; Department of Pharmacology and Experimental Toxicology; University of Ljubljana; Ljubljana Slovenia
| | - Tina Kosjek
- Department of Environmental Sciences; Jozef Stefan Institute; Ljubljana Slovenia
| | - Ajda Prevc
- Department of Experimental Oncology; Institute of Oncology Ljubljana; Ljubljana Slovenia
| | - Maja Cemazar
- Department of Experimental Oncology; Institute of Oncology Ljubljana; Ljubljana Slovenia
- Faculty of Health Sciences; University of Primorska; Izola Slovenia
| | - Gregor Sersa
- Department of Experimental Oncology; Institute of Oncology Ljubljana; Ljubljana Slovenia
- Faculty of Health Sciences; University of Ljubljana; Ljubljana Slovenia
- Faculty of Health Sciences; University of Primorska; Izola Slovenia
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19
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Rezaee Z, Yadollahpour A, Bayati V, Negad Dehbashi F. Gold nanoparticles and electroporation impose both separate and synergistic radiosensitizing effects in HT-29 tumor cells: an in vitro study. Int J Nanomedicine 2017; 12:1431-1439. [PMID: 28260889 PMCID: PMC5327907 DOI: 10.2147/ijn.s128996] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND AND OBJECTIVE Radiation therapy (RT) is the gold standard treatment for more than half of known tumors. Despite recent improvements in RT efficiency, the side effects of ionizing radiation (IR) in normal tissues are a dose-limiting factor that restricts higher doses in tumor treatment. One approach to enhance the efficiency of RT is the application of radiosensitizers to selectively increase the dose at the tumor site. Gold nanoparticles (GNPs) and electroporation (EP) have shown good potential as radiosensitizers for RT. This study aims to investigate the sensitizing effects of EP, GNPs, and combined GNPs-EP on the dose enhancement factor (DEF) for 6 MV photon energy. METHODS Radiosensitizing effects of EP, GNPs, and combinations of GNPs-EP were comparatively investigated in vitro for intestinal colon cancer (HT-29) and Chinese hamster ovary (CHO) cell lines by MTT assay and colony formation assay at 6 MV photon energy in six groups: IR (control group), GNPs+IR, GNPs (24 h)+IR, EP+IR, GNPs+EP+IR, and GNPs (24 h)+EP+IR. RESULTS Treatment of both cell lines with EP, GNPs, and combined GNPs-EP significantly enhanced the response of cells to irradiation. However, the HT-29 showed higher DEF values for all groups. In addition, the DEF value for HT-29 cells for GNPs+IR, GNPs (24 h)+IR, EP+IR, GNPs+EP+IR, and GNPs (24 h)+EP+IR was, respectively, 1.17, 1.47, 1.36, 2.61, and 2.89, indicating synergistic radiosensitizing effect for the GNPs (24 h)+EP+IR group. Furthermore, the synergistic effect was observed just for HT-29 tumor cell lines. CONCLUSION Combined GNPs-EP protocols induced synergistic radiosensitizing effect in HT-29 cells, and the effect is also tumor specific. This combined therapy can be beneficially used for the treatment of intrinsically less radiosensitive tumors.
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Affiliation(s)
- Zohre Rezaee
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Avhaz, Iran
- Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Ali Yadollahpour
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Avhaz, Iran
- Department of Medical Physics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Vahid Bayati
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Avhaz, Iran
| | - Fereshteh Negad Dehbashi
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Avhaz, Iran
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20
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Josserand V, Kéramidas M, Lavaud J, Righini C, Vollaire J, Bellard E, Rols MP, Teissié J, Coll JL, Golzio M. Electrochemotherapy guided by intraoperative fluorescence imaging for the treatment of inoperable peritoneal micro-metastases. J Control Release 2016; 233:81-7. [PMID: 27155365 DOI: 10.1016/j.jconrel.2016.05.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 04/25/2016] [Accepted: 05/01/2016] [Indexed: 01/15/2023]
Abstract
Surgery is often the first therapeutic indication in cancer. Patient survival essentially depends on the completeness of tumor resection. This is a major challenge, particularly in patients with peritoneal carcinomatosis (PC), where tumors are widely disseminated in the large peritoneal cavity. These small tumors can be difficult to visualize and are often positioned in delicate locations, further increasing the risk of producing serious tissue/organ damage during their ablation. We propose an innovative therapeutic approach based on intraoperative fluorescence (IF) guided electrochemotherapy (ECT) for the treatment of peritoneal micro-metastases. ECT combines the effects of tissue electro-permeabilization (EP) with the administration of an antimitotic agent (bleomycin) that has poor permeability across intact membranes. IF significantly improves the detection of small tumor lesions. ECT is clinically validated for the treatment of cutaneous tumors in animals and humans, but this is the first time that it has been used along with IF imaging for the targeted treatment of peritoneal metastases in a preclinical model. We set up a murine model of PC that develops secondarily to the resection of a distant primary tumor. Tumor growth and metastasis were finely monitored by non-invasive multimodal imaging (bioluminescence and 3D fluorescence/microCT). Once metastases were detected, mice were randomized into three groups: the ECT group (bleomycin injected intravenously followed by EP) and 2 control groups (bleomycin alone and EP alone). Twenty four hours after the intravenous injection of the tumor targeting agent Angiostamp™700, mice in all groups underwent an abdominal surgery for metastases exploration assisted by fluorescence imaging with the Fluobeam®700 portative device. EP was applied to every nodule detected by IF, except in the bleomycin control group. After surgery, the metastatic invasion was tracked by bioluminescence imaging. In mice treated with bleomycin or EP alone, the metastatic load progressed very rapidly and mice showed no significant difference in lifespan compared to non-operated mice (median lifespan: 27days vs. 25days, respectively). In contrast, the mice treated with ECT displayed a decreased metastatic load and an increased survival rate (median lifespan: 34days). These results provide evidence that IF guided ECT is an effective approach for the treatment of inoperable intraperitoneal micro-metastases.
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Affiliation(s)
- V Josserand
- INSERM U1209, Institut Albert Bonniot, F-38000 Grenoble, France; Univ. Grenoble Alpes, Institut Albert Bonniot, F-38000 Grenoble, France
| | - M Kéramidas
- INSERM U1209, Institut Albert Bonniot, F-38000 Grenoble, France; Univ. Grenoble Alpes, Institut Albert Bonniot, F-38000 Grenoble, France
| | - J Lavaud
- INSERM U1209, Institut Albert Bonniot, F-38000 Grenoble, France; Univ. Grenoble Alpes, Institut Albert Bonniot, F-38000 Grenoble, France
| | - C Righini
- INSERM U1209, Institut Albert Bonniot, F-38000 Grenoble, France; Univ. Grenoble Alpes, Institut Albert Bonniot, F-38000 Grenoble, France; CHU, Grenoble, France
| | - J Vollaire
- INSERM U1209, Institut Albert Bonniot, F-38000 Grenoble, France; Univ. Grenoble Alpes, Institut Albert Bonniot, F-38000 Grenoble, France
| | - E Bellard
- CNRS, IPBS, Toulouse, France; Université de Toulouse, UPS, IPBS, Toulouse, France
| | - M P Rols
- CNRS, IPBS, Toulouse, France; Université de Toulouse, UPS, IPBS, Toulouse, France
| | - J Teissié
- CNRS, IPBS, Toulouse, France; Université de Toulouse, UPS, IPBS, Toulouse, France
| | - J L Coll
- INSERM U1209, Institut Albert Bonniot, F-38000 Grenoble, France; Univ. Grenoble Alpes, Institut Albert Bonniot, F-38000 Grenoble, France.
| | - M Golzio
- CNRS, IPBS, Toulouse, France; Université de Toulouse, UPS, IPBS, Toulouse, France.
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Abstract
STUDY DESIGN Preliminary report of new antitumor treatment. OBJECTIVE To evaluate the effectiveness of electrochemotherapy as a novel treatment of spinal metastasis. SUMMARY OF BACKGROUND DATA Electrochemotherapy is a new antitumor treatment that combines systemic bleomycin with electric pulses delivered locally at the tumor site. These electric pulses permeabilize cell membranes in the tissue, allow bleomycin delivery diffusion inside the cells, and increase bleomycin cytotoxicity. Previous clinical studies have demonstrated the effectiveness of electrochemotherapy in the treatment of several primary and metastatic solid tumors. METHODS Treatment planning for electrode positioning and electrical pulse parameters was prepared for 4 needle electrodes. Mini-open surgery with a left L5 laminectomy was performed to introduce the eletrodes. The patient was treated according to the established Electrochemotherapy Protocol with Bleomycin. Clinical efficacy of electrochemotherapy was evaluated according to a visual analog scale of pain, Oswestry Disability Index 2.0, the Karnofsky Performance Scale, and Response Evaluation Criteria in Solid Tumors. RESULTS The assessed follow-up period was 48 months after the electrochemotherapy procedure. Neither serious electrochemotherapy-related adverse events, nor bleomycin toxicity were reported. Overall improvement in pain according to Oswestry Disability Index 2.0 and Karnofsky Performance Scale outcomes was better. CONCLUSION Our case represents, to our knowledge, the first one to test the potential role of electrochemotherapy as treatment of spinal metastasis. Electrochemotherapy allowed a successful treatment of metastatic spinal melanoma. However, we believe that there is a strong scientific rationale to support the potential utility of electrochemotherapy as a novel treatment of spinal metastasis, regardless of the histological types. LEVEL OF EVIDENCE 5.
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Skolucka N, Daczewska M, Saczko J, Chwilkowska A, Choromanska A, Kotulska M, Kaminska I, Kulbacka J. ETM study of electroporation influence on cell morphology in human malignant melanoma and human primary gingival fibroblast cells. Asian Pac J Trop Biomed 2014; 1:94-8. [PMID: 23569735 DOI: 10.1016/s2221-1691(11)60003-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2011] [Revised: 02/22/2011] [Accepted: 03/13/2011] [Indexed: 10/28/2022] Open
Abstract
OBJECTIVE To estimate electroporation (EP) influence on malignant and normal cells. METHODS Two cell lines including human malignant melanoma (Me-45) and normal human gingival fibroblast (HGFs) were used. EP parameters were the following: 250, 1 000, 1 750, 2 500 V/cm; 50 µs by 5 impulses for every case. The viability of cells after EP was estimated by MTT assay. The ultrastructural analysis was observed by transmission electron microscope (Zeiss EM 900). RESULTS In the current study we observed the intracellular effect following EP on Me-45 and HGF cells. At the conditions applied, we did not observe any significant damage of mitochondrial activity in both cell lines treated by EP. Conversely, we showed that EP in some conditions can stimulate cells to proliferation. Some changes induced by EP were only visible in electron microscopy. In fibroblast cells we observed significant changes in lower parameters of EP (250 and 1 000 V/cm). After applying higher electric field intensities (2 500 V/cm) we detected many vacuoles, myelin-like bodies and swallowed endoplasmic reticulum. In melanoma cells such strong pathological modifications after EP were not observed, in comparison with control cells. The ultrastructure of both treated cell lines was changed according to the applied parameters of EP. CONCLUSIONS We can claim that EP conditions are cell line dependent. In terms of the intracellular morphology, human fibroblasts are more sensitive to electric field as compared with melanoma cells. Optimal conditions should be determined for each cell line. Summarizing our study, we can conclude that EP is not an invasive method for human normal and malignant cells. This technique can be safely applied in chemotherapy for delivering drugs into tumor cells.
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Affiliation(s)
- Nina Skolucka
- Department of Medical Biochemistry, Medical University, Chalubinskiego 10 St., 50-368 Wroclaw, Poland
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Jourabchi N, Beroukhim K, Tafti BA, Kee ST, Lee EW. Irreversible electroporation (NanoKnife) in cancer treatment. GASTROINTESTINAL INTERVENTION 2014. [DOI: 10.1016/j.gii.2014.02.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Yang J, Huang X, Luo F, Cheng X, Cheng L, Liu B, Chen L, Hu R, Shi C, Zhuang G, Yin P. Preparation and functional studies of hydroxyethyl chitosan nanoparticles loaded with anti-human death receptor 5 single-chain antibody. Onco Targets Ther 2014; 7:779-87. [PMID: 24899816 PMCID: PMC4039402 DOI: 10.2147/ott.s59872] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Objective To prepare hydroxyethyl chitosan nanoparticles loaded with anti-human death receptor 5 single-chain antibody, and study their characteristics, functions, and mechanisms of action. Materials and methods The anti-human death receptor 5 single-chain antibody was constructed and expressed. Protein-loaded hydroxyethyl chitosan nanoparticles were prepared, and their size, morphology, particle-size distribution and surface zeta potential were measured by scanning electron microscopy and laser particle-size analysis. Mouse H22 hepatocellular carcinoma cells were cultured, and growth inhibition was examined using the CellTiter-Blue cell-viability assay. Flow cytometry and Hoechst 33342 were employed to measure cell apoptosis. Kunming mice with H22 tumor models were treated with protein-loaded hydroxyethyl chitosan nanoparticles, and their body weight and tumor size were measured, while hematoxylin and eosin staining was used to detect antitumor effects in vivo and side effects from tumors. Results The protein-loaded hydroxyethyl chitosan nanoparticles had good stability; the zeta potential was −24.2±0.205, and the dispersion index was 0.203. The inhibition of the protein-loaded hydroxyethyl chitosan nanoparticles on H22 growth was both time- and dose-dependent. Increased expressions of active caspase 8, active caspase 3, and BAX were detected following treatment. The average weight gain, tumor weight, and mean tumor volume of the protein and protein-loaded hydroxyethyl chitosan nanoparticle groups were significantly different (P<0.05) compared with the phosphate-buffered saline group. Conclusion The protein-loaded hydroxyethyl chitosan nanoparticles effectively suppressed tumor growth, indicating that nanotechnology has the potential for broad application in cancer therapy.
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Affiliation(s)
- Jingjing Yang
- Anti-Cancer Research Center, Medical College, Xiamen University, Fujian, People's Republic of China ; Organ transplantation institution, Xiamen University, Xiamen, People's Republic of China
| | - Xiaoping Huang
- Anti-Cancer Research Center, Medical College, Xiamen University, Fujian, People's Republic of China ; Organ transplantation institution, Xiamen University, Xiamen, People's Republic of China
| | - Fanghong Luo
- Anti-Cancer Research Center, Medical College, Xiamen University, Fujian, People's Republic of China
| | - Xiaofeng Cheng
- Organ transplantation institution, Xiamen University, Xiamen, People's Republic of China
| | - Lianna Cheng
- Organ transplantation institution, Xiamen University, Xiamen, People's Republic of China
| | - Bin Liu
- Jilin Vocational College of Industry and Technology, Jilin, People's Republic of China
| | - Lihong Chen
- The Department of Pathology, Zhongshan Hospital, Xiamen University, Xiamen, People's Republic of China
| | - Ruyi Hu
- Anti-Cancer Research Center, Medical College, Xiamen University, Fujian, People's Republic of China ; Organ transplantation institution, Xiamen University, Xiamen, People's Republic of China
| | - Chunyan Shi
- Anti-Cancer Research Center, Medical College, Xiamen University, Fujian, People's Republic of China ; Organ transplantation institution, Xiamen University, Xiamen, People's Republic of China
| | - Guohong Zhuang
- Anti-Cancer Research Center, Medical College, Xiamen University, Fujian, People's Republic of China ; Organ transplantation institution, Xiamen University, Xiamen, People's Republic of China
| | - Ping Yin
- The Department of Pathology, Zhongshan Hospital, Xiamen University, Xiamen, People's Republic of China
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Miklavčič D, Mali B, Kos B, Heller R, Serša G. Electrochemotherapy: from the drawing board into medical practice. Biomed Eng Online 2014; 13:29. [PMID: 24621079 PMCID: PMC3995705 DOI: 10.1186/1475-925x-13-29] [Citation(s) in RCA: 209] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Accepted: 03/04/2014] [Indexed: 12/14/2022] Open
Abstract
Electrochemotherapy is a local treatment of cancer employing electric pulses to improve transmembrane transfer of cytotoxic drugs. In this paper we discuss electrochemotherapy from the perspective of biomedical engineering and review the steps needed to move such a treatment from initial prototypes into clinical practice. In the paper also basic theory of electrochemotherapy and preclinical studies in vitro and in vivo are briefly reviewed. Following this we present a short review of recent clinical publications and discuss implementation of electrochemotherapy into standard of care for treatment of skin tumors, and use of electrochemotherapy for other targets such as head and neck cancer, deep-seated tumors in the liver and intestinal tract, and brain metastases. Electrodes used in these specific cases are presented with their typical voltage amplitudes used in electrochemotherapy. Finally, key points on what should be investigated in the future are presented and discussed.
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Affiliation(s)
- Damijan Miklavčič
- Faculty of electrical Engineering, Department of Biomedical Engineering, University of Ljubljana, Trzaska 25, Ljubljana SI-1000, Slovenia.
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Möller MG, Salwa S, Soden DM, O’Sullivan GC. Electrochemotherapy as an adjunct or alternative to other treatments for unresectable or in-transit melanoma. Expert Rev Anticancer Ther 2014; 9:1611-30. [DOI: 10.1586/era.09.129] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Sedlar A, Kranjc S, Dolinsek T, Cemazar M, Coer A, Sersa G. Radiosensitizing effect of intratumoral interleukin-12 gene electrotransfer in murine sarcoma. BMC Cancer 2013; 13:38. [PMID: 23360213 PMCID: PMC3562515 DOI: 10.1186/1471-2407-13-38] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 01/24/2013] [Indexed: 11/15/2022] Open
Abstract
Background Interleukin-12 (IL-12) based radiosensitization is an effective way of tumor treatment. Local cytokine production, without systemic shedding, might provide clinical benefit in radiation treatment of sarcomas. Therefore, the aim was to stimulate intratumoral IL-12 production by gene electrotransfer of plasmid coding for mouse IL-12 (mIL-12) into the tumors, in order to explore its radiosensitizing effect after single or multiple intratumoral gene electrotransfer. Methods Solid SA-1 fibrosarcoma tumors, on the back of A/J mice, were treated intratumorally by mIL-12 gene electrotransfer and 24 h later irradiated with a single dose. Treatment effectiveness was measured by tumor growth delay and local tumor control assay (TCD50 assay). With respect to therapeutic index, skin reaction in the radiation field was scored. The tumor and serum concentrations of cytokines mIL-12 and mouse interferon γ (mIFNγ) were measured. Besides single, also multiple intratumoral mIL-12 gene electrotransfer before and after tumor irradiation was evaluated. Results Single intratumoral mIL-12 gene electrotransfer resulted in increased intratumoral but not serum mIL-12 and mIFNγ concentrations, and had good antitumor (7.1% tumor cures) and radiosensitizing effect (21.4% tumor cures). Combined treatment resulted in the radiation dose-modifying factor of 2.16. Multiple mIL-12 gene electrotransfer had an even more pronounced antitumor (50% tumor cures) and radiosensitizing (86.7% tumor cures) effect. Conclusions Single or multiple intratumoral mIL-12 gene electrotransfer resulted in increased intratumoral mIL-12 and mIFNγ cytokine level, and may provide an efficient treatment modality for soft tissue sarcoma as single or adjuvant therapy to tumor irradiation.
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Affiliation(s)
- Ales Sedlar
- Department of Experimental Oncology, Institute of Oncology Ljubljana, Ljubljana, Slovenia
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Ciric E, Sersa G. Radiotherapy in combination with vascular-targeted therapies. Radiol Oncol 2010; 44:67-78. [PMID: 22933894 PMCID: PMC3423684 DOI: 10.2478/v10019-010-0025-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2009] [Accepted: 04/20/2010] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Given the critical role of tumor vasculature in tumor development, considerable efforts have been spent on developing therapeutic strategies targeting the tumor vascular network. A variety of agents have been developed, with two general approaches being pursued. Antiangiogenic agents (AAs) aim to interfere with the process of angiogenesis, preventing new tumor blood vessel formation. Vascular-disrupting agents (VDAs) target existing tumor vessels causing tumor ischemia and necrosis. Despite their great therapeutic potential, it has become clear that their greatest clinical utility may lie in combination with conventional anticancer therapies. Radiotherapy is a widely used treatment modality for cancer with its distinct therapeutic challenges. Thus, combining the two approaches seems reasonable. CONCLUSIONS Strong biological rationale exist for combining vascular-targeted therapies with radiation. AAs and VDAs were shown to alter the tumor microenvironment in such a way as to enhance responses to radiation. The results of preclinical and early clinical studies have confirmed the therapeutic potential of this new treatment strategy in the clinical setting. However, concerns about increased normal tissue toxicity, have been raised.
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Affiliation(s)
- Eva Ciric
- Institute of Oncology Ljubljana, Ljubljana, Slovenia
| | - Gregor Sersa
- Institute of Oncology Ljubljana, Ljubljana, Slovenia
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Kranjc S, Tevz G, Kamensek U, Vidic S, Cemazar M, Sersa G. Radiosensitizing Effect of Electrochemotherapy in a Fractionated Radiation Regimen in Radiosensitive Murine Sarcoma and Radioresistant Adenocarcinoma Tumor Model. Radiat Res 2009; 172:677-85. [DOI: 10.1667/rr1873.1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Spugnini EP, Citro G, Baldi A. Adjuvant electrochemotherapy in veterinary patients: a model for the planning of future therapies in humans. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2009; 28:114. [PMID: 19682373 PMCID: PMC2739846 DOI: 10.1186/1756-9966-28-114] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/14/2009] [Accepted: 08/14/2009] [Indexed: 12/21/2022]
Abstract
The treatment of soft tissue tumors needs the coordinated adoption of surgery with radiation therapy and eventually, chemotherapy. The radiation therapy (delivered with a linear accelerator) can be preoperative, intraoperative, or postoperative. In selected patients adjuvant brachytherapy can be adopted. The goal of these associations is to achieve tumor control while maximally preserving the normal tissues from side effects. Unfortunately, the occurrence of local and distant complications is still elevated. Electrochemotherapy is a novel technique that combines the administration of anticancer agents to the application of permeabilizing pulses in order to increase the uptake of antitumor molecules. While its use in humans is still confined to the treatment of cutaneous neoplasms or the palliation of skin tumor metastases, in veterinary oncology this approach is rapidly becoming a primary treatment. This review summarizes the recent progresses in preclinical oncology and their possible transfer to humans.
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Sadadcharam M, Soden DM, O'sullivan GC. Electrochemotherapy: An emerging cancer treatment. Int J Hyperthermia 2009; 24:263-73. [DOI: 10.1080/02656730701832334] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Comparison between hypoxic markers pimonidazole and glucose transporter 1 (Glut-1) in murine fibrosarcoma tumours after electrochemotherapy. Radiol Oncol 2009. [DOI: 10.2478/v10019-009-0029-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Spugnini EP, Citro G, D’Avino A, Baldi A. Potential role of electrochemotherapy for the treatment of soft tissue sarcoma: First insights from preclinical studies in animals. Int J Biochem Cell Biol 2008; 40:159-63. [DOI: 10.1016/j.biocel.2007.10.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2007] [Revised: 10/01/2007] [Accepted: 10/02/2007] [Indexed: 12/21/2022]
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Bicek A, Turel I, Kanduser M, Miklavcic D. Combined therapy of the antimetastatic compound NAMI-A and electroporation on B16F1 tumour cells in vitro. Bioelectrochemistry 2007; 71:113-7. [PMID: 17602896 DOI: 10.1016/j.bioelechem.2007.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2007] [Revised: 05/17/2007] [Accepted: 05/28/2007] [Indexed: 10/23/2022]
Abstract
Ruthenium complex NAMI-A [ImH][trans-RuCl(4)(DMSO-S)Im] (Im = imidazole) is a potential chemotherapeutic drug in cancer treatment. Electroporation can be used to facilitate delivery of NAMI-A into cells. Suspension of B16F1 tumour cells from mouse melanoma in NAMI-A solution was exposed to a train of electric pulses. The effect of NAMI-A was determined by examining cell viability in clonogenic test. Our results show that electroporation increases the otherwise scarce in vitro effects of NAMI-A, i.e. reduces cell viability. At the conditions chosen for experiments 90% of cells survived in the presence of 1 microM NAMI-A, whereas in a combined treatment with 1 microM NAMI-A and electroporation only about 10% of cells survived.
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Affiliation(s)
- Ajda Bicek
- Faculty of Electrical Engineering, University of Ljubljana, Trzaska 25, SI-1000 Ljubljana, Slovenia
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Lee EW, Loh CT, Kee ST. Imaging guided percutaneous irreversible electroporation: ultrasound and immunohistological correlation. Technol Cancer Res Treat 2007; 6:287-94. [PMID: 17668935 DOI: 10.1177/153303460700600404] [Citation(s) in RCA: 164] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Preliminary results of percutaneous irreversible electroporation (PIE) on swine liver as a novel non-thermal ablation are presented. The goal of this study was to evaluate the feasibility of using irreversible electroporation in more clinically applicable manner, a percutaneous method, and to investigate a possible role of apoptosis in PIE-induced cell death. We performed PIE on four swine livers under real-time ultrasound guidance. The lesions created by PIE were imaged with ultrasound and were correlated with histology data, including pro-apoptotic marker. A total of 11 lesions were created with a mean size of 16.8 cm(3) in 8.4 +/- 1.8 minutes. Real-time monitoring was performed and a correlation of (+) 2 +/- 3.2 mm in measurement comparison between ultrasound and gross pathologic measurements was demonstrated. Complete hepatic cell death without structural destruction, unaffected by heat-sink effect, and with a sharp demarcation between the ablated zone and the non-ablated zone were observed. Immunohistological analysis confirmed complete apoptotic cell death by PIE on Von Kossa, BAX, and H&E staining. In summary, PIE can provide a novel and unique ablative method with real-time monitoring capability, ultra-short procedure time, non-thermal ablation, and well-controlled and focused apoptotic cell death.
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Affiliation(s)
- Edward W Lee
- Department of Radiology, Division of Interventional Radiology, University of California-Los Angeles, David Geffen School of Medicine, 10833 Le Conte Avenue, BL-423, Los Angeles, CA 90095-1721, USA
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Sersa G, Miklavcic D, Cemazar M, Rudolf Z, Pucihar G, Snoj M. Electrochemotherapy in treatment of tumours. Eur J Surg Oncol 2007; 34:232-40. [PMID: 17614247 DOI: 10.1016/j.ejso.2007.05.016] [Citation(s) in RCA: 277] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2007] [Accepted: 05/29/2007] [Indexed: 10/23/2022] Open
Abstract
AIM Electrochemotherapy is a local drug delivery approach aimed at treatment with palliative intent of cutaneous and subcutaneous tumour nodules of different histologies. Electrochemotherapy, via cell membrane permeabilising electric pulses, potentiates the cytotoxicity of non-permeant or poorly permeant anticancer drugs with high intrinsic cytotoxicity, such as bleomycin or cisplatin, at the site of electric pulse application. METHODS An overview of preclinical and clinical studies is presented, and the treatment procedure is further critically evaluated. RESULTS In clinical studies electrochemotherapy has proved to be a highly efficient and safe approach for treating cutaneous and subcutaneous tumour nodules. The treatment response for various tumours (predominantly melanoma) was approximately 75% complete and 10% partial response of the treated nodules. CONCLUSIONS Electrochemotherapy is a new, clinically acknowledged method for the treatment of cutaneous and subcutaneous tumours. Its advantages are high effectiveness on tumours with different histologies, simple application, minimal side effects and the possibility of effective repetitive treatment.
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Affiliation(s)
- G Sersa
- Institute of Oncology Ljubljana, Zaloska 2, SI-1000 Ljubljana, Slovenia
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