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- Title
Synthesis and Evaluation of Gd<sup>III</sup>-Based Magnetic Resonance Contrast Agents for Molecular Imaging of Prostate-Specific Membrane Antigen.
- Authors
Banerjee, Sangeeta Ray; Ngen, Ethel J.; Rotz, Matthew W.; Kakkad, Samata; Lisok, Ala; Pracitto, Richard; Pullambhatla, Mrudula; Chen, Zhengping; Shah, Tariq; Artemov, Dmitri; Meade, Thomas J.; Bhujwalla, Zaver M.; Pomper, Martin G.
- Abstract
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 in vivo. 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 GdIII-based PSMA-targeted contrast agents containing one to three GdIII chelates per molecule. We evaluated the relaxometric properties of these agents in solution, in prostate cancer cells, and in an in vivo experimental model to demonstrate the feasibility of PSMA-based MR molecular imaging.
- Subjects
CONTRAST media; PROSTATE-specific membrane antigen; MAGNETIC resonance imaging; CHEMICAL synthesis; CHEMICAL research
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 37, p10928
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201503417