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Updated: Oct 20, 2025
09:29
The Bioconjugation and Radiosynthesis of 89Zr-DFO-labeled Antibodies
Published on: February 12, 2015
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The Race for Hydroxamate-Based Zirconium-89 Chelators
Irene V J Feiner1,2, Marie Brandt1,2, Joseph Cowell3
1Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, 1090 Vienna, Austria.
Cancers
|September 10, 2021
Summary
New chelators offer improved stability for zirconium-89 (89Zr) radiopharmaceuticals in nuclear medicine imaging. These advanced ligands overcome limitations of desferrioxamine (DFO), enhancing diagnostic accuracy and reducing patient radiation dose.
Area of Science:
- Nuclear Medicine
- Radiochemistry
- Biomedical Imaging
Background:
- Zirconium-89 (89Zr) is a promising radionuclide for immunoPET imaging due to its suitable half-life and decay properties.
- The commonly used chelator desferrioxamine (DFO) forms 89Zr complexes with insufficient in vivo stability, leading to bone uptake and increased background signal.
Purpose of the Study:
- To review the progress in developing next-generation chelators for 89Zr.
- To highlight novel chelators that offer enhanced stability and improved performance over DFO for clinical translation.
Main Methods:
- Review of preclinical and clinical studies on 89Zr chelators up to end of 2020.
- Analysis of chelator design based on hydroxamate scaffolds for stable 89Zr coordination.
Main Results:
- Next-generation chelators demonstrate superior in vivo stability compared to DFO.
- New chelator candidates show advanced stages of clinical translation with promising performance.
Conclusions:
- Advanced chelators are crucial for overcoming the limitations of DFO in 89Zr-based immunoPET.
- These novel chelators are expected to improve diagnostic accuracy and patient safety in nuclear medicine.
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