Abstract
Purpose
Fludarabine has proven to be of considerable efficacy in the treatment of low-grade lymphomas. We have developed the labeling of this drug with fluorine-18 and evaluated 2-[18F]fludarabine as a novel positron emission tomography (PET) probe for in vivo imaging.
Procedures
Preclinical studies were conducted with 2-[18F]fludarabine, in parallel with 2-deoxy-2-[18F]fluoro-d-glucose ([18F]FDG), in Swiss CD-1 and CB17 severely combined immunodeficient (SCID) mice, both as tumor-free control groups, and SCID mice bearing RL lymphomas.
Results
In Swiss mice, micro-PET studies with 2-[18F]fludarabine showed a distribution restricted to the organs of excretion and the spleen, the latter being less evident in SCID animals. In lymphoma-bearing SCID mice, 2-[18F]fludarabine demonstrated a rapid tumor uptake over the first 20 min which subsequently plateaued and provided an improved contrast than that of [18F]FDG.
Conclusion
This radiotracer merits further evaluation to establish its clinical usefulness to image low-grade lymphoma in humans in future clinical investigations.
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Acknowledgments
We would like to thank the staff members of the team for their service and support. This work has been in part supported by a grant from the French National Agency for Research called “Investissements d’Avenir” no. ANR-11-LABEX-0018-01, the Commissariat à l’Energie Atomique et aux Energies Alternatives (CEA), and the region Basse Normandie.
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The authors declare that they have no conflict of interest.
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Dhilly, M., Guillouet, S., patin, D. et al. 2-[18F]Fludarabine, a Novel Positron Emission Tomography (PET) Tracer for Imaging Lymphoma: a Micro-PET Study in Murine Models. Mol Imaging Biol 16, 118–126 (2014). https://doi.org/10.1007/s11307-013-0659-2
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DOI: https://doi.org/10.1007/s11307-013-0659-2