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- W2086865499 abstract "Radio-iododeoxyuridine (IdUrd) is a potential Auger radiation therapy agent incorporated into DNA during the synthesis phase. In this study we sought to optimise S-phase targeting by modulating cellular cycling and radio-IdUrd DNA incorporation using short non-toxic fluorodeoxyuridine (FdUrd) incubations. Three human glioblastoma cell lines with different p53 expression were pre-treated with various FdUrd conditions. After different intervals, 125I-IdUrd DNA incorporation was measured. Fluorescence-activated cell sorter cell cycle analysis was performed after identical intervals post FdUrd pre-treatment. The highest increase in 125I-IdUrd DNA incorporation was induced by 1-h incubation with 1 μM FdUrd. Increase in radio-IdUrd DNA incorporation was greatest 16–24 h after FdUrd, reaching factors of ≥7.5 over baseline incorporation in the three cell lines. Furthermore, cell synchronisation in S phase was observed with a peak of ≥69.5% in the three cell lines at 16 and 24 h post FdUrd, corresponding to an increase of 2.5–4.1 over baseline. FdUrd-induced thymidine synthesis inhibition led to S-phase accumulation that was maximal after an interval of 16–24 h and time-correlated with the highest radio-IdUrd DNA incorporation. These observations might allow the rational design of an Auger radiation therapy targeting a maximal number of S-phase cells in single treatment cycles." @default.
- W2086865499 created "2016-06-24" @default.
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- W2086865499 date "2006-02-01" @default.
- W2086865499 modified "2023-09-24" @default.
- W2086865499 title "Short fluorodeoxyuridine exposure of different human glioblastoma lines induces high-level accumulation of S-phase cells that avidly incorporate 125I-iododeoxyuridine" @default.
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- W2086865499 doi "https://doi.org/10.1007/s00259-005-0009-y" @default.
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