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Lead-212/Bismuth-212 In Vivo Generator Based on Ultrasmall Silver Telluride Nanoparticles
Runze Wang1, Hubert Th Wolterbeek1, Antonia G Denkova1
1Applied Radiation and Isotopes, Department of Radiation Science and Technology, Faculty of Applied Sciences, Delft University of Technology, Delft, The Netherlands.
Journal of Labelled Compounds & Radiopharmaceuticals
|August 15, 2024
Summary
Ultrasmall silver telluride nanoparticles show promise for targeted cancer therapy. These nanoparticles demonstrate high radiochemical stability and induce tumor cell killing, offering potential for novel theragnostic radiopharmaceuticals.
Area of Science:
- Nanotechnology
- Radiochemistry
- Oncology
Background:
- Alpha emitters offer potential for personalized cancer treatment.
- Radiopharmaceutical design faces challenges with radioconjugate stability due to nuclear decay.
- Ultrasmall nanoparticles are being explored to overcome these limitations.
Purpose of the Study:
- To develop and evaluate ultrasmall silver telluride nanoparticles for radiopharmaceutical applications.
- To assess the radiolabeling efficiency and stability of these nanoparticles.
- To investigate their potential for theragnostic applications in cancer treatment.
Main Methods:
- Preparation of ultrasmall silver telluride nanoparticles (2.1 nm core diameter).
- Chelator-free radiolabeling with lead-212 and indium-111.
- In vitro radiochemical stability assays.
- Cell uptake and subcellular distribution studies in U87 cells.
Main Results:
- High radiolabeling efficiency (75%) achieved with lead-212.
- Excellent in vitro radiochemical stability demonstrated for bismuth-212.
- Indium-111 labeled nanoparticles showed nuclear accumulation and induced significant tumor cell killing via Auger electrons.
- Fast renal clearance and potential for targeting vector attachment were noted.
Conclusions:
- Ultrasmall silver telluride nanoparticles exhibit high radiochemical stability and therapeutic potential.
- These nanoparticles are promising candidates for developing advanced theragnostic radiopharmaceuticals.
- Further research can leverage their properties for targeted cancer therapy and diagnosis.
