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- W3100198265 abstract "Abstract Water is an essential component of many biochemical reactions. Deuterated water (D 2 O) has been used to study cell kinetics, protein synthesis, and metabolism. We hypothesized that rapidly proliferating cancer cells would become preferentially labeled with deuterium due to high metabolic activity, thus allowing imaging of biosynthetically labeled metabolites within tumors in vivo . We initiated systemic D 2 O labeling in two established tumor xenograft models, HT-29 and MiaPaCa-2 and imaged mice by deuterium magnetic resonance spectroscopic imaging (dMRSI). After 14 days of tumor growth and 7 days of in vivo labeling, a clear contrast was demonstrated between the xenograft and the contralateral control limb in both models. The origin of the contrast was traced to an aliphatic peak at 1.8 ppm, which was identified by ex vivo NMR analysis to originate from cholesterol and cholesterol esters. Cholesterol is important for tumor cell proliferation, signaling, and malignant transformation, while current methods to monitor cholesterol synthesis and accumulation are limited. This deuterated water labeling-imaging approach could complement current cancer imaging techniques, allowing not only imaging of uptake but also synthesis of cholesterol to elucidate effects on tumor cholesterol metabolism in vivo ." @default.
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- W3100198265 date "2019-10-17" @default.
- W3100198265 modified "2023-10-16" @default.
- W3100198265 title "In vivodeuterated water labeling allows tumor visualization via deuterium magnetic resonance spectroscopic imaging of cholesterol" @default.
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- W3100198265 doi "https://doi.org/10.1101/809327" @default.
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