Treatment of experimental tumors with a combination of a pulsing magnetic field and an antitumor drug

Japanese Journal of Cancer Research : Gann
Y OmoteH Kobayashi

Abstract

We investigated the effects of a combination treatment involving a pulsing magnetic field (PMF) and an antitumor drug, mitomycin C (MMC), on two experimental tumors (fibrosarcoma KMT-17 and hepatocellular carcinoma KDH-8) in WKA rats, paying attention to possible potentiation of the therapeutic effect of the antitumor drug. PMF was obtained using a system generating a pulsed current in a solenoid coil. On day 7 after tumor implantation into the right thighs of rats, the region of the tumor was exposed to PMF (frequency 200 Hz, mean magnetic flux density 40 gauss) for 1 h immediately after iv injection of MMC at a dose of 1 mg/kg. Survival rates at day 90 of KMT-17 implanted rats were 0% (0/10) in the non-treated group, 34% (4/12) in the MMC-treated group, 47% (6/13) in the PMF-treated group and 77% (10/13) in the MMC/PMF combination group. The increase of life span (ILS) of KDH-8-implanted rats in the combination therapy group was significantly prolonged (%ILS 17.6%) compared with that in the MMC-treated (%ILS 3.4%) and PMF-treated (%ILS 7.6%) groups. By using cultured cells of the above two lines of tumor, the therapeutic effects of MMC and PMF were also determined from the cell colony-forming efficiency in soft agar. The colo...Continue Reading

References

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Citations

Sep 15, 2012·Cell Biochemistry and Biophysics·Zeinab ShankayiMahsa G Mansurian
Nov 14, 2001·Journal of Photochemistry and Photobiology. B, Biology·L PangH Berg
Jun 21, 2013·Electromagnetic Biology and Medicine·Zeinab ShankayiAkram Mahna
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Aug 17, 2010·Cancer Biotherapy & Radiopharmaceuticals·Wen-Fang ChenJian-Qiang Liu
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Mar 7, 2020·Biophysical Journal·Christopher P AshdownMark M Fuster

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