Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 37, Pages 10778-10782Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201503417
Keywords
cancer; gadolinium; imaging agents; magnetic resonance imaging
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Funding
- NIH [CA148901, CA151838, CA134675]
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Magnetic resonance (MR) imaging is advantageous because it concurrently provides anatomic, functional, and molecular information. MR molecular imaging can combine the high spatial resolution of this established clinical modality with molecular profiling invivo. However, as a result of the intrinsically low sensitivity of MR imaging, high local concentrations of biological targets are required to generate discernable MR contrast. We hypothesize that the prostate-specific membrane antigen (PSMA), an attractive target for imaging and therapy of prostate cancer, could serve as a suitable biomarker for MR-based molecular imaging. We have synthesized three new high-affinity, low-molecular-weight Gd-III-based PSMA-targeted contrast agents containing one to three Gd(III)chelates per molecule. We evaluated the relaxometric properties of these agents in solution, in prostate cancer cells, and in an invivo experimental model to demonstrate the feasibility of PSMA-based MR molecular imaging.
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