Synthesis and Evaluation of GdIII‐Based Magnetic Resonance Contrast Agents for Molecular Imaging of Prostate‐Specific Membrane Antigen1. (23rd July 2015)

• Record Type: Journal Article
• 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.
• Is Part Of: Angewandte Chemie. Volume 127:Number 37(2015)
• Page Start: 10928
• Page End: 10932
• Publication Date: 2015-07-23
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201503417
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 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 in vivo experimental model to demonstrate the feasibility of PSMA‐based MR molecular imaging.</p> </abstract>