Cytotoxic effects and in vitro reversal of multidrug resistance by therapeutic ultrasound in human hepatocarcinoma cell line (HepG2)

Ultrasonics
Ze-Yong ShaoFeng Wu

Abstract

Multidrug resistance (MDR) is one of the major obstacles to successful chemotherapy of human malignancies. Although many strategies have been explored to overcome MDR, none of them have been proven to be clinically useful until now. The aim of this study was to investigate whether a novel therapeutic ultrasound (US) approach would have useful effects on the reversal of MDR in cancer cells. Wild-type and MDR phenotype (HepG2/ADM) cells of the human hepatocarcinoma cell line HepG2 were exposed to 0.8 MHz US at an intensity of 0.43 W/cm(2) for a 9s exposure (total energy density: 3.87 J/cm(2)). After US exposure, cell number and viability were counted immediately, and flow cytometry was performed to measure retention of rhodamine 123 and adriamycin in HepG2 and HepG2/MDR cells. Both cell lines were then incubated in suspension with adriamycin, vincristine, etoposide, cisplatin and 5-fluorouracil, respectively, and the MTT assay was used to determine cytotoxicity. The results showed that US exposure could significantly increase the uptake of Rh123 and ADM by HepG2/ADM tumor cells. The resistant index for the chemotherapeutic drugs was significantly lower in the US-exposed HepG2/ADM cells than in those not exposed to US. It was ther...Continue Reading

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Citations

Mar 25, 2014·Ultrasonics Sonochemistry·Yukihiro FurusawaTakashi Kondo
Sep 24, 2015·Environmental Science and Pollution Research International·Matjaž NovakMetka Filipič
May 7, 2015·Environmental Science and Pollution Research International·Goran GajskiMetka Filipič
Jan 4, 2013·PloS One·Mariame A HassanTakashi Kondo
Jan 25, 2011·Microbial Biotechnology·Sabine KienesbergerEllen L Zechner

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