期刊
NANOMEDICINE
卷 9, 期 13, 页码 1923-1937出版社
FUTURE MEDICINE LTD
DOI: 10.2217/NNM.13.185
关键词
Zr-89; anti-endoglin antibody-targeted gold nanoparticles; biodistribution; cancer; CD105; immuno-PET; molecular imaging
资金
- Walloon Region through the 'TARGAN' project
- Belgian National Fund for Scientific Research (FNRS-TELEVIE)
- NICHD
Aims: Antibody-labeled gold nanoparticles represent an attractive tool for cancer imaging and therapy. In this study, the anti-CD105 antibody was conjugated with gold nanoparticles (AuNPs) for the first time. The antibody biodistribution in mice before and after conjugation to AuNPs was studied, with a focus on tumor targeting. Materials & methods: Antibodies were radiolabeled with 89Zr before conjugation to AuNPs (5 nm). Immunonanoconjugates were characterized in vitro in terms of size, stability in plasma and binding to the target. Quantitative PET imaging and ICP-MS ana-lysis assessed in vivo distribution and specific tumor targeting of tracers. Results: The tumor uptake of immunoconjugates was preserved up to 24h after injection, with high tumor contrast and selective tumor targeting. No major tracer accumulation was observed over time in nonspecific organs. ICP-MS ana-lysis confirmed the antibody specificity after nanoparticle conjugation. Conclusion: The anti-CD105 antibody conjugation to AuNPs did not greatly affect CD105-dependent tumor uptake and the efficacy of tumor targeting for cancer detection.
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