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Mechanisms underlying 18F-fluorodeoxyglucose accumulation in colorectal cancer

Journal

WORLD JOURNAL OF RADIOLOGY
Volume 8, Issue 11, Pages 880-886

Publisher

BAISHIDENG PUBLISHING GROUP INC
DOI: 10.4329/wjr.v8.i11.880

Keywords

F-18-fluorodeoxyglucose-positron emission tomography; Colorectal cancer; Glucose metabolism; Mutational status; KRAS

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Positron emission tomography (PET) with F-18-fluorodeoxyglucose (FDG) is a diagnostic tool to evaluate metabolic activity by measuring accumulation of FDG, an analogue of glucose, and has been widely used for detecting small tumors, monitoring treatment response and predicting patients' prognosis in a variety of cancers. However, the molecular mechanism of FDG accumulation into tumors remains to be investigated. It is well-known that most cancers are metabolically active with elevated glucose metabolism, a phenomenon known as the Warburg effect. The underlying mechanisms for elevated glucose metabolism in cancer tissues are complex. Recent reports have indicated the potential of FDG-PET/CT scans in predicting mutational status (e.g., KRAS gene mutation) of colorectal cancer (CRC), which suggests that FDG-PET/CT scans may play a key role in determining therapeutic strategies by non-invasively predicting treatment response to anti-epidermal growth factor receptor (EGFR) therapy. In this review, we summarize the current findings investigating the molecular mechanism of F-18-FDG accumulation in CRC.

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