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Treatment of spontaneous canine mast cell tumors by electrochemotherapy combined with IL-12 gene electrotransfer [Elektronski vir] : comparison of intratumoral and peritumoral application of IL-12Lampreht Tratar, Urša ...The combined treatment of electrochemotherapy (ECT) and interleukin-12 (IL-12) gene electrotransfer (GET) has already been used in clinical studies in dogs to treat various histological types of ... spontaneous tumors. The results of these studies show that the treatment is safe and effective. However, in these clinical studies, the routes of administration of IL-12 GET were either intratumoral (i.t.) or peritumoral (peri.t.). Therefore, the objective of this clinical trial was to compare the two IL-12 GET routes of administration in combination with ECT and their contribution to the enhanced ECT response. Seventy-seven dogs with spontaneous mast cell tumors (MCTs) were divided into three groups: one treated with a combination of ECT + GET peri. t. (29 dogs), the second with the combination of ECT + GET i.t. (30 dogs), and the third with ECT alone (18 dogs). In addition, immunohisto- chemical studies of tumor samples before treatment and flow cytometry of peripheral blood mononuclear cells (PBMCs) before and after treatment were performed to determine any immunological aspects of the treatment. The results showed that local tumor control was significantly better in the ECT + GET i.t. group (p < 0.050) than in the ECT + GET peri.t. or ECT groups. In addition, disease-free interval (DFI) and progression-free survival (PFS) were significantly longer in the ECT + GET i.t. group than in the other two groups (p < 0.050). The data on local tumor response, DFI, and PFS were consistent with immunological tests, as we detected an increased percentage of antitumor immune cells in the blood after treatment in the ECT + GET i.t. group, which also indicated the induction of a systemic immune response. In addition, we did not observe any unwanted severe or long-lasting side effects. Finally, due to the more pronounced local response after ECT + GET i.t., we suggest that treatment response assessment should be performed at least two months after treatment, which meets the iRECIST criteria.Source: International immunopharmacology. - ISSN 1878-1705 (Vol. 120, [article no.] 110274, 2023, str. 1-13)Type of material - e-article ; adult, seriousPublish date - 2023Language - englishCOBISS.SI-ID - 152950787
Author
Lampreht Tratar, Urša |
Milevoj, Nina |
Čemažar, Maja |
Žnidar, Katarina |
Uršič Valentinuzzi, Katja, 1990- |
Brožič, Andreja |
Tomsič, Katerina |
Serša, Gregor |
Tozon, Nataša
Topics
elektrokemoterapija |
elektroprenos genov |
interlevkin 12 |
electrochemotherapy |
gene electrotransfer |
interleukin-12
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Lampreht Tratar, Urša | 36367 |
Milevoj, Nina | 39087 |
Čemažar, Maja | 14575 |
Žnidar, Katarina | 37534 |
Uršič Valentinuzzi, Katja, 1990- | 38223 |
Brožič, Andreja | 35354 |
Tomsič, Katerina | 33348 |
Serša, Gregor | 08800 |
Tozon, Nataša | 13328 |
Source: Personal bibliographies
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