Preventive effect of oral administration of 6-(methylsulfinyl)hexyl isothiocyanate derived from wasabi (Wasabia japonica Matsum) against pulmonary metastasis of B16-BL6 mouse melanoma cells |
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Authors: | Fuke Yoko Shinoda Shoko Nagata Ikuko Sawaki Saeko Murata Mituyoshi Ryoyama Kazuo Koizumi Keiichi Saiki Ikuo Nomura Takahiro |
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Affiliation: | Department of Food Science and Human Nutrition, Tokyo Metropolitan University, Akishima, Tokyo 196-8540, Japan. fuke@tmca.ac.jp |
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Abstract: | AIM: Effect of oral administration of 6-(methylsulfinyl)hexyl isothiocyanate (6-MITC) or a 6-MITC-containing T-wasabi fraction from wasabi root (Wasabia japonica Matsum) to inhibit the macroscopic pulmonary metastasis was studied with a murine B16-BL6 melanoma model. METHOD: Two administration routes, subcutaneous or intravenous, and two administration times, prior to or concomitant with tumor inoculation, of 6-MITC or T-wasabi against the metastatic foci formation in C57BL/6J mouse lungs were compared. RESULTS: The number of metastasized foci per lung in either subcutaneous or intravenous injection was significantly reduced by intake of 6-MITC or a T-wasabi fraction. The maximum reduction by a T-wasabi fraction reached to 82%. Fifty-six percent of foci formation was inhibited by a 2 week-prior administration of 6-MITC (200 microM), whereas only 27% inhibition was obtained by a concomitant administration with tumor inoculation. Neither 6-MITC nor T-wasabi at tested concentrations showed any toxic effects. DISCUSSION: Together with our previous results, a component of the Japanese pungent spice, wasabi appears to inhibit not only tumor cell growth but also tumor metastasis. Therefore, 6-MITC from wasabi is apparently a useful dietary candidate for controlling tumor progression. |
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Keywords: | Wasabi 6-(Methylsulfinyl)hexyl isothiocyanate (6-MITC) Anti-metastatic activity B16-BL6 melanoma Metastatic lung foci Pulmonary metastasis Diet Custom-made diet Preventive effect |
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