Journal
ADVANCED HEALTHCARE MATERIALS
Volume 5, Issue 8, Pages 928-935Publisher
WILEY
DOI: 10.1002/adhm.201500992
Keywords
breast cancer; CCR5 targeting; gold nanoparticles; radiolabeling; single photon emission computed tomography
Funding
- NIH [R01 CA138527]
- Georgia Institute of Technology
- China Scholarship Council
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Gold nanoparticles have been labeled with various radionuclides and extensively explored for single photon emission computed tomography (SPECT) in the context of cancer diagnosis. The stability of most radiolabels, however, still needs to be improved for accurate detection of cancer biomarkers and thereby monitoring of tumor progression and metastasis. Here, the first synthesis of Au nanoparticles doped with Au-199 atoms for targeted SPECT tumor imaging in a mouse triple negative breast cancer (TNBC) model is reported. By directly incorporating Au-199 atoms into the crystal lattice of each Au nanoparticle, the stability of the radiolabel can be ensured. The synthetic procedure also allows for a precise control over both the radiochemistry and particle size. When conjugated with D-Ala1-peptide T-amide, the Au nanoparticles doped with Au-199 atoms can serve as a C-C chemokine receptor 5 (CCR5)-targeted nanoprobe for the sensitive and specific detection of both TNBC and its metastasis in a mouse tumor model.
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