Abstract
Electropermeabilization was shown to markedly increase the sensitivity of murine colorectal carcinoma (CRC) cells to bleomycin (BLM), resulting in more than 2,500-fold higher susceptibility to BLM. Subsequent in vivo electrochemotherapy with BLM revealed profound antitumor effects on subcutaneous CRC tumors. Furthermore, when electrochemotherapy with BLM was employed for the treatment of orthotopic CRC tumors in mice, significantly prolonged survival priods were observed. These results indicate the feasibility of electrochemotherapy with BLM for the treatment of CRC and demonstrate that electrochemotherapy can be translated from the treatment of cutaneous and subcutaneous tumors to the treatment of internal cancers including CRC.
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