화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.70, 196-203, February, 2019
In vivo detection of sentinel lymph nodes with PEGylated crushed gold shell @ radioactive core nanoballs
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Positron-emitting radioactive isotope-labeled gold nanomaterials are suitable imaging agents in biomedical imaging owing to their high sensitivity, straightforward clinical translation, adequate information regarding clinical safety, and their application in another new imaging modality, Cerenkov luminescent imaging. This study aimed to investigate the potential application of PEGylated crushed gold shell @ radioiodine-labeled core nanoparticles (PEG-124I-Au@AuCBs) in detecting sentinel lymph nodes (SLNs) in mice in vivo, using the dual imaging modality of positron emission tomography and Cerenkov luminescence imaging (PET/CLI). PEG-124I-Au@AuCBs were non-toxic and did not affect cellular function in normal and immune cells. In vivo PET imaging revealed the selective accumulation of PEG 124IAu@AuCBs in SLNs proximal to the site of injection 1 h after injection and radioactivity was detected from the SLN until 24 h. Consistently, the SLNs were also visualized using in vivo CLI at 24 h, consistent with the findings of ex vivo bio-distribution and histological analyses. Therefore, PEG-124I-Au@AuCBs are suitable multimodal contrast agents for in vivo SLN mapping in pre- or intraoperative guidance.
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