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Copper-free click--a promising tool for pre-targeted PET imaging
Helen L Evans1, Rozanna L Slade, Laurence Carroll
1Comprehensive Cancer Imaging Centre, Department of Surgery & Cancer, Hammersmith Campus, Imperial College, London, United Kingdom.
Chemical Communications (Cambridge, England)
|December 14, 2011
Summary
Copper-free click (CFC) reactions show promise for in vivo pre-targeting in PET imaging. Optimized CFC reactions using [(18)F]2-fluoroethylazide and cyclooctynes proceed efficiently, offering application-specific tuning opportunities.
Area of Science:
- Radiochemistry
- Molecular Imaging
- Bioconjugation Chemistry
Background:
- Positron Emission Tomography (PET) imaging requires efficient and specific radiolabeling methods.
- In vivo pre-targeting strategies aim to improve tumor targeting and reduce off-target radiation dose.
- Copper-free click (CFC) reactions offer bioorthogonal and rapid conjugation capabilities.
Purpose of the Study:
- To evaluate the potential of the copper-free click (CFC) reaction for in vivo pre-targeting in PET imaging.
- To assess the biodistribution profile of radiolabeled compounds used in CFC reactions.
- To optimize CFC reaction conditions for efficient in vivo applications.
Main Methods:
- Evaluation of the copper-free click (CFC) reaction for in vivo pre-targeting.
- Utilizing [(18)F]2-fluoroethylazide as a radiotracer.
- Optimization of CFC reaction conditions with a series of cyclooctynes.
Main Results:
- A promising biodistribution profile was demonstrated for the evaluated system.
- The CFC reaction proceeded efficiently with the tested radiotracer and cyclooctynes.
- Successful application-specific tuning of the CFC reaction was achieved.
Conclusions:
- The copper-free click (CFC) reaction is a viable strategy for in vivo pre-targeting in PET imaging.
- The tested radiotracer and optimized reaction conditions yield efficient and promising results.
- Further development offers opportunities for tailored applications in molecular imaging.
