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• W2131767985 abstract "Abstract The metabolites, transporters, and enzymes involved in choline metabolism are regarded as biomarkers for disease progression in a variety of cancers, but their in vivo detection is not ideal. Both magnetic resonance spectroscopy [MRS using chemical shift imaging (CSI) total choline (tCho)] and 11C-choline positron emission tomography (PET) can probe this pathway, but they have not been compared side by side. In this study, we used the spontaneous murine astrocytoma model SMA560 injected intracranially into syngeneic VM/Dk mice, analyzing animals at various postimplantation time points using dynamic microPET imaging and CSI MRS. We observed an increase in tumor volume and 11C-choline uptake between days 5 and 18. Similarly, tCho levels decreased at days 5 to 18. We found a negative correlation between the tCho and PET results in the tumor and a positive correlation between the tCho tumor-to-brain ratio and choline uptake in the tumor. PCR results confirmed expected increases in expression levels for most of the transporters and enzymes. Using MRS quantification, a good agreement was found between CSI and 11C-choline PET data, whereas a negative correlation occurred when CSI was not referenced. Thus, 11C-choline PET and MRS methods seemed to be complementary in strengths. While advancing tumor proliferation caused an increasing 11C-choline uptake, gliosis and inflammation potentially accounted for a high peritumoral tCho signal in CSI, as supported by histology and secondary ion mass spectrometry imaging. Our findings provide definitive evidence of the use of MRS, CSI, and PET for imaging tumors in vivo. Cancer Res; 73(5); 1470–80. ©2012 AACR." @default.
• W2131767985 created "2016-06-24" @default.
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• W2131767985 date "2013-03-01" @default.
• W2131767985 modified "2023-10-15" @default.
• W2131767985 title "Multimodal Elucidation of Choline Metabolism in a Murine Glioma Model Using Magnetic Resonance Spectroscopy and 11C-Choline Positron Emission Tomography" @default.
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• W2131767985 doi "https://doi.org/10.1158/0008-5472.can-12-2532" @default.
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