Molecular imaging of tumors and metastases using chemical exchange saturation transfer (CEST) MRI.

Abstract

The two glucose analogs 2-deoxy-D-glucose (2-DG) and 2-fluoro-2-deoxy-D-glucose (FDG) are preferentially taken up by cancer cells, undergo phosphorylation and accumulate in the cells. Owing to their exchangeable protons on their hydroxyl residues they exhibit significant chemical exchange saturation transfer (CEST) effect in MRI. Here we report CEST-MRI on mice bearing orthotopic mammary tumors injected with 2-DG or FDG. The tumor exhibited an enhanced CEST effect of up to 30% that persisted for over one hour. Thus 2-DG/FDG CEST MRI can replace PET/CT or PET/MRI for cancer research in laboratory animals, but also has the potential to be used in the clinic for the detection of tumors and metastases, distinguishing between malignant and benign tumors and monitoring tumor response to therapy as well as tumors metabolism noninvasively by using MRI, without the need for radio-labeled isotopes.

• Authors: Michal Rivlin, Judith Horev, Ilan Tsarfaty, Gil Navon
• Journal: Scientific reports (Sci Rep) Vol. 3 Pg. 3045 (Oct 25 2013) ISSN: 2045-2322 [Electronic] England
• PMID: 24157711 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Contrast Media
• Fluorodeoxyglucose F18

Topics

• Animals
• Cell Line, Tumor
• Contrast Media
• Disease Models, Animal
• Female
• Fluorine-19 Magnetic Resonance Imaging (methods)
• Fluorodeoxyglucose F18
• Humans
• Magnetic Resonance Imaging (methods)
• Mice
• Molecular Imaging (methods)
• Neoplasms (diagnosis)