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- W2040281390 abstract "Simvastatin has inhibitory effects on cancers. The present study aimed to investigate the interactive effects between simvastatin and S-1 against bile duct cancer and its mechanisms. The effects of simvastatin and 5-fluorouracil (5-FU) alone or in combination on the growth and apoptosis of the human cholangiocarcinoma cell line EGI-1 and the gallbladder carcinoma cell line Mz-ChA-1 cells were evaluated in vitro. Real-time PCR and western blot were used to determine E2F-1 and thymidylate synthase (TS) expressions in the treated cells. Tumoricidal efficacy of simvastatin and S-1 was further investigated in a subcutaneous bile duct cancer model in NOD/SCID mice. Simvastatin enhanced the cytotoxicity of 5-FU on bile duct cancer cells in vitro. IC50 of 5-FU alone was 4.34 μmol/l for EGI-1 and 13.9 μmol/l for MZ-ChA-1, whereas it decreased markedly to 0.90 and 2.95 μmol/l, respectively, when combined with simvastatin. The Chou and Talalay combination index of 5-FU and simvastatin was 0.41 and 0.40 at IC50 for EGI-1 and MZ-ChA-1, respectively. Simvastatin alone or plus 5-FU significantly suppressed E2F-1 and TS expressions in EGI-1 and MZ-ChA-1. Simvastatin plus 5-FU induced greater proportion of apoptotic cells on both EGI-1 and MZ-ChA-1, with an increase in cleaved caspase-3 levels, compared with simvastatin or 5-FU alone (all P<0.05). Simvastatin plus S-1 induced greater tumor inhibition than simvastatin or S-1 alone with E2F-1/TS downregulation in vivo (all P<0.05). Simvastatin and S-1 exerted synergistic effects against bile duct cancer, which might be mediated by E2F-1/TS downregulation. The combination could be a reasonable regimen in the management of bile duct cancer." @default.
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- W2040281390 date "2013-11-01" @default.
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- W2040281390 title "Simvastatin enhances the chemotherapeutic efficacy of S-1 against bile duct cancer" @default.
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- W2040281390 doi "https://doi.org/10.1097/cad.0b013e328364f935" @default.
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