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- W2034792191 abstract "Hosoi, Y., Matsumoto, Y., Enomoto, A., Morita, A., Green, J., Nakagawa, K., Naruse, K. and Suzuki, N. Suramin Sensitizes Cells to Ionizing Radiation by Inactivating DNA-Dependent Protein Kinase. Radiat. Res. 162, 308–314 (2004).Here we report that suramin sensitizes LM217, MDA-MB-468, T98G and A431 cells to ionizing radiation. Suramin sensitized cells to X radiation in a dose-dependent fashion, and longer exposure to suramin before X irradiation resulted in more efficient sensitization. The dose-modifying factors calculated from the survival curves were 1.18 in LM217 cells and 1.37 in MDA-MB-468 cells. Suramin did not sensitize Scid cells that had no DNA-dependent protein kinase activity. Suramin inhibited DNA-dependent protein kinase activity in vitro and in vivo. The concentration of suramin resulting in 50% inhibition in vitro was 1.7 μM in LM217 cells and 2.4 μM in MDA-MB-468 cells. Exposure of LM217 and MDA-MB-468 cells to suramin did not affect the level of Ku70 (G22P1) or Ku80 (XRCC5), but it increased the level of DNA-PKcs (PRKDC). Suramin did not sensitize LM217 or MDA-MB-468 cells to UV radiation. Suramin's effects were not caused by accumulation of cells in a specific phase of the cell cycle. These results suggest that suramin sensitizes cells to ionizing radiation by inhibiting DNA-dependent protein kinase activity." @default.
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- W2034792191 date "2004-09-01" @default.
- W2034792191 modified "2023-10-11" @default.
- W2034792191 title "Suramin Sensitizes Cells to Ionizing Radiation by Inactivating DNA-Dependent Protein Kinase" @default.
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- W2034792191 doi "https://doi.org/10.1667/rr3217" @default.
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