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- W2114579255 abstract "Purpose: 19F magnetic resonance spectroscopy (MRS) was used to non-invasively detect EF5 [2-(2-nitro-1H-imidazol-1-yl)-N-(2,2,3,3,3-pentafluoropropyl) acetamide] adducts in the Shionogi tumour model of prostate cancer to evaluate hypoxia.Material and methods: 19F MRS signal of EF5 in Shionogi mouse tumours was acquired using a 2 cm diameter solenoid volume coil with a 7.05 T Bruker scanner. MRS signal was observed in mouse tumours longitudinally following intraperitoneal (IP) injection of EF5. Another mouse group was injected intravenously (IV) with EF5, and in vivo MRS signal was obtained two hours after injection. This data was compared with the ex vivo percentage of hypoxic cells present in the corresponding excised tumours, determined by flow cytometry of bound EF5.Results: Longitudinal 19F MRS signal attributable to EF5 began to decline within five hours of EF5 administration. Flow cytometry comparisons yielded an inverse correlation (p-value < 0.006) between the MRS signal and tumour hypoxic cell percentage. The tumours exhibited an average cell viability of 34 ± 26%.Conclusions: The results confirmed that MRS of EF5 in mice is an unsuitable technique for the determination of EF5 binding as a measure of tumour hypoxia." @default.
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- W2114579255 date "2008-01-01" @default.
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- W2114579255 title "<i>In vivo</i>measurement of the hypoxia marker EF5 in Shionogi tumours using<sup>19</sup>F magnetic resonance spectroscopy" @default.
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- W2114579255 doi "https://doi.org/10.1080/09553000801902174" @default.
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