Biological Evaluation of a Fluorescent-Imaging Agent for Medullary Thyroid Cancer in an Orthotopic Model.

Rossfeld KK, Justiniano SE, Ding H, Gong L, Kothandaraman S, Sawant D, Saji M, Wright CL, Kirschner LS, Ringel MD, Tweedle MF, Phay JE
J Clin Endocrinol Metab 102 3268-3277 01/01/2017


Context: The primary and definitive treatment of medullary thyroid cancer (MTC) is surgical resection. Recurrent or residual disease is typically a result of incomplete surgical removal.

Objective: Our objective is to develop a compound that assists in intraoperative visualization of cancer, which would have the potential to improve surgical cure rates and outcomes.

Results: We report the biological characterization of Compound-17, which is labeled with IRdye800, allowing fluorescent visualization of MTC mouse models. We found that the agent has high affinity for two human MTC cell lines (TT and MZ-CRC1) in vitro and in vivo. We further tested the affinity of the compound in a newly developed MTC orthotopic xenograft model and found that Compound-17 produces fluorescent signals within MTC-derived orthotopic xenografts in comparison with a sequence-jumbled control compound and surrounding normal tissues.

Conclusions: Compound-17 is a unique and effective molecule for MTC identification that may have therapeutic potential.

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