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Viral Nanoparticles for In vivo Tumor Imaging
Published on: November 16, 2012
Multimodality nuclear and fluorescence tumor imaging in mice using a streptavidin nanoparticle
Minmin Liang1, Xinrong Liu, Dengfeng Cheng
1Department of Radiology, University of Massachusetts Medical School, Worcester, Massachusetts 01655, USA.
Bioconjugate Chemistry
|June 19, 2010
Summary
This study developed novel streptavidin nanoparticle complexes for dual fluorescence and nuclear imaging of tumors. These agents show high tumor accumulation and contrast, enabling effective tumor detection in mice.
Area of Science:
- Molecular imaging
- Nanoparticle-based contrast agents
- Bioconjugation chemistry
Background:
- Multimodality imaging agents offer enhanced diagnostic capabilities by combining information from different detection methods.
- Streptavidin nanoparticle complexes provide a versatile platform for attaching multiple imaging functionalities.
- Targeted delivery of imaging agents is crucial for specific tumor detection and characterization.
Purpose of the Study:
- To develop and evaluate streptavidin nanoparticle-based complexes as multimodality imaging agents for tumor detection.
- To assess the feasibility of combining fluorescence and nuclear imaging using a single nanoparticle agent.
- To investigate the targeting and pharmacokinetic properties of these novel imaging agents in a preclinical tumor model.
Main Methods:
- Streptavidin nanoparticles were functionalized with biotinylated anti-Her2 antibody, DOTA chelator labeled with Indium-111 ( (111)In ), and Cy5.5 fluorophore.
- Multimodality imaging was performed in Her2-positive SUM190 tumor-bearing mice using IVIS fluorescence and NanoSPECT/CT small animal nuclear cameras.
- Biodistribution studies were conducted to quantify the accumulation of the imaging agent in tumors and normal tissues.
Main Results:
- The developed streptavidin nanoparticle complexes enabled simultaneous fluorescence and nuclear imaging of tumors.
- High tumor accumulation and excellent tumor-to-normal tissue contrast were observed with both imaging modalities.
- Biodistribution studies confirmed specific tumor targeting, with radioactivity accumulation of 21 ID%/g at 40 hours post-injection, significantly higher than other organs.
Conclusions:
- Streptavidin nanoparticle-based complexes are effective multimodality imaging agents for preclinical tumor detection.
- The platform allows for straightforward attachment of multiple imaging functionalities, offering flexibility for various applications.
- This approach holds promise for advancing molecular imaging techniques with potential for broader clinical translation.
