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Copper Loading of Preformed Nanoparticles for PET-Imaging Applications
Hoang D Lu1, Leon Z Wang1, Brian K Wilson1
1Department of Chemical and Biological Engineering, Princeton University , Princeton, New Jersey 08544, United States.
ACS Applied Materials & Interfaces
|December 23, 2017
Summary
New nanoparticles efficiently chelate copper-64 for enhanced positron emission tomography (PET) imaging. These stable, water-dispersible nanoparticles offer rapid, mild radionuclide loading, improving PET contrast agent development.
Area of Science:
- Materials Science
- Nanotechnology
- Radiochemistry
Background:
- Nanoparticles (NPs) are promising for positron emission tomography (PET) imaging by concentrating radionuclides.
- Current NP radionuclide loading methods face challenges like harsh conditions, low efficiency, and altered surface properties.
Purpose of the Study:
- To develop novel, water-dispersible NPs for efficient PET radionuclide chelation.
- To create NPs with high phthalocyanine loading and tunable properties for improved PET imaging.
Main Methods:
- Utilized Flash NanoPrecipitation for self-assembly of polyethylene glycol-coated NPs.
- Encapsulated phthalocyanines into NP cores at >50 wt % loading.
- Investigated metal chelation kinetics and stability of the NPs with copper-64 (⁶⁴Cu).
Main Results:
- Produced NPs ranging from 70 to 160 nm with high phthalocyanine loading.
- Achieved rapid (>90% in 1 hour) and spontaneous chelation of copper(II) under mild conditions (pH 6, 37 °C).
- Demonstrated stable ⁶⁴Cu retention even in the presence of EDTA, with tunable chelation kinetics.
Conclusions:
- Developed facile and efficient method for creating PET-active NPs.
- These NPs offer a promising platform for advanced PET imaging contrast agents.
- Tunable NP properties allow optimization for specific radionuclide labeling and imaging applications.
