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Abstract

New imaging probes with high sensitivity and stability are urgently needed to accurately detect sentinel lymph nodes (SLNs) for successful cancer diagnosis. Herein, the use of highly sensitive and stable PEGylated radionuclide-embedded gold nanoparticles (PEG-RIe-AuNPs) is reported for the detection of SLNs by combined positron emission tomography and Cerenkov luminescence imaging (PET/CLI). PEG-RIe-AuNPs show high sensitivity and stability both in vitro and in vivo, and are not toxic to normal ovarian and immune cells. In vivo PET/CLI imaging clearly reveals SLNs as early as 1 h post PEG-RIe-AuNP-injection, with peak signals achieved at 6 h postinjection, which is consistent with the biodistribution results. Taken together, the data provide strong evidence that PEG-RIe-AuNPs are promising as potential lymphatic tracers in biomedical imaging for pre and intraoperative surgical guidance. 

Author information

Lee SB1,2, Yoon GS3, Lee SW1,2, Jeong SY1, Ahn BC1, Lim DK4, Lee J1,5, Jeon YH1,2.​

1Department of Nuclear Medicine, Kyungpook National University Hospital, Daegu, 702-210, South Korea.

2Leading-edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Hospital, Daegu, 702-210, South Korea.

3Department of Pathology, Kyungpook National University Hospital, Daegu, 702-210, South Korea.

4KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, South Korea.

5Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, 360-4, South Korea.