Gene electrotransfer of plasmid AMEP, an integrin-targeted therapy, has antitumor and antiangiogenic action in murine B16 melanoma

Gene Therapy
Masa BosnjakGregor Sersa

Abstract

Gene therapy with Plasmid AMEP (antiangiogenic metargidin peptide) has recently been studied as a potential targeted therapy for melanoma. This plasmid is designed to downregulate α5β1 and αvβ3 integrins. In our study, electroporation was used as a nonviral delivery system. We investigated the antiangiogenic and direct antitumor effectiveness of this gene therapy on low and highly metastatic B16 melanoma variants. In vitro, the antiangiogenic effectiveness as determined by tube formation assay on endothelial cells was predominantly dependent on AMEP expression levels. In vivo, antitumor effectiveness was mediated by the inhibition of proliferation, migration and invasion of melanoma cells and correlated with the expression of integrins on tumor cells after intratumor delivery. In addition, reduced metastatic potential was shown. Intramuscular gene electrotransfer of Plasmid AMEP, for AMEP systemic distribution, had no antitumor effect with this specific preventive treatment protocol, confirming that direct tumor delivery was more effective. This study confirms our previous in vitro data that the expression levels of integrins on melanoma cells could be used as a biomarker for antitumor effectiveness in integrin-targeted therapi...Continue Reading

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Citations

Jan 14, 2016·Expert Opinion on Biological Therapy·Jessica Pahle, Wolfgang Walther
Oct 10, 2015·Human Molecular Genetics·Niclas E BengtssonGuy L Odom
Aug 31, 2016·Molecular Therapy. Nucleic Acids·Spela KosGregor Sersa
Feb 23, 2018·Cancer Immunology, Immunotherapy : CII·Urska KamensekGregor Sersa
Jul 5, 2018·Technology in Cancer Research & Treatment·Monika SavarinGregor Sersa
Jul 3, 2018·Oncology Letters·Tinglu LiHe Huang
Jan 8, 2021·OncoTargets and Therapy·Jianbing HouHongjuan Cui

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