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The Novel HDAC Inhibitor OBP-801/YM753 Enhances the Effects of 5-Fluorouracil With Radiation on Esophageal Squamous Carcinoma Cells
* Department of Molecular-Targeting Cancer Prevention, Kyoto Prefectural University of Medicine,
Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
† Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine,
Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto, Japan
Oncology Research 2015, 23(1-2), 87-87. https://doi.org/10.3727/096504016X14514194509664
Abstract
Histone deacetylase (HDAC) inhibitors have been shown to enhance the effects of 5-fluorouracil (5-FU) against various cancer cells; however, no report has shown that an HDAC inhibitor may enhance the effects of 5-FU with radiation. Therefore, we investigated whether the novel HDAC inhibitor OBP-801/YM753 could enhance the effects of 5-FU with radiation on esophageal squamous carcinoma KYSE170 cells. The inhibition of the cell growth was significantly stronger with the combination of OBP-801/YM753 with 5-FU than with the 5-FU treatment only. Furthermore, inhibition of the colony formation was the most effective with the combined treatment of OBP-801/YM753, 5-FU, and radiation. Western blot analysis showed that OBP-801/YM753 suppressed the expression of thymidylate synthase induced by 5-FU. Therefore, this three-combined therapy is promising for patients with esophageal squamous carcinoma.Keywords
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