Salicylic Acid-Based Polymeric Contrast Agents for Molecular Magnetic Resonance Imaging of Prostate Cancer

Sangeeta Ray Banerjee, Xiaolei Song, Xing Yang, Il Minn, Ala Lisok, Yanrong Chen, Albert Bui, Samit Chatterjee, Jian Chen, Peter C.M. van Zijl, Michael T. McMahon, Martin G. Pomper

Research output: Contribution to journalArticlepeer-review

Abstract

Chemical exchange saturation transfer (CEST) magnetic resonance imaging (MRI) is an innovative molecular imaging technique in which contrast agents are labeled by saturating their exchangeable proton spins by radio-frequency irradiation. Salicylic acid and its analogues are a promising class of highly sensitive, diamagnetic CEST agents. Herein, polymeric agents grafted with salicylic acid moieties and a known high-affinity ligand targeting prostate-specific membrane antigen in approximately 10:1 molar ratio were synthesized to provide sufficient MRI sensitivity and receptor specificity. The proton-exchange properties of the contrast agent in solution and in an experimental murine model are reported to demonstrate the feasibility of receptor-targeted CEST MRI of prostate cancer. Furthermore, the CEST imaging data were validated with an 111In-labeled analogue of the agent by in vivo single photon emission computed tomographic imaging and tissue biodistribution studies.

Original languageEnglish (US)
Pages (from-to)7235-7242
Number of pages8
JournalChemistry - A European Journal
Volume24
Issue number28
DOIs
StatePublished - May 17 2018

Keywords

  • antigens
  • cancer
  • imaging agents
  • magnetic resonance imaging
  • polymers

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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