Volume 127, Issue 37 pp. 10928-10932
Zuschrift

Synthesis and Evaluation of GdIII-Based Magnetic Resonance Contrast Agents for Molecular Imaging of Prostate-Specific Membrane Antigen

Dr. Sangeeta Ray Banerjee

Corresponding Author

Dr. Sangeeta Ray Banerjee

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)Search for more papers by this author
Dr. Ethel J. Ngen

Dr. Ethel J. Ngen

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

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Matthew W. Rotz

Matthew W. Rotz

Chemistry, Northwestern University, Evanston, IL 60208 (USA)

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Dr. Samata Kakkad

Dr. Samata Kakkad

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

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Ala Lisok

Ala Lisok

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

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Richard Pracitto

Richard Pracitto

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

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Mrudula Pullambhatla

Mrudula Pullambhatla

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

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Dr. Zhengping Chen

Dr. Zhengping Chen

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

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Dr. Tariq Shah

Dr. Tariq Shah

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

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Dr. Dmitri Artemov

Dr. Dmitri Artemov

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

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Dr. Thomas J. Meade

Dr. Thomas J. Meade

Chemistry, Northwestern University, Evanston, IL 60208 (USA)

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Dr. Zaver M. Bhujwalla

Dr. Zaver M. Bhujwalla

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

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Dr. Martin G. Pomper

Dr. Martin G. Pomper

The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD 21231 (USA)

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First published: 23 July 2015
Citations: 7

We would like to thank A. Jacobs, D. Jacob, G. Green, Dr. B. Wang, Dr. M. F. Penet, V. S. Harrison, and Dr. K. W. Macrenaris for initial assistance with the experiments. Funding for the project was provided by the NIH CA148901 (to S.R.B.), CA151838, CA134675 (to M.G.P.).

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.

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