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Imaging proliferation in vivo with [F-18]FLT and positron emission tomography

Abstract

Positron emission tomography (PET) is now regularly used in the diagnosis and staging of cancer. These uses and its ability to monitor treatment response would be aided by the development of imaging agents that can be used to measure tissue and tumor proliferation. We have developed and tested [F-18]FLT (3'-deoxy-3'-fluorothymidine); it is resistant to degradation, is retained in proliferating tissues by the action of thymidine kinase 1 (TK), and produces high-contrast images of normal marrow and tumors in canine and human subjects.

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Figure 1: Structure of FLT and its phosphorylation by thymidine kinase 1 (TK1).
Figure 2: a, Whole-body image obtained with 81 MBq [F-18]FLT (after the dynamic imaging was completed).
Figure 3: FLT image of the neck of a dog with non-Hodgkin's lymphoma in two enlarged nodes (open arrows) and marrow activity (filled arrow) as well.
Figure 4: Images of a patient with non-small cell lung cancer obtained after the injection of 50 MBq of [F-18]FLT using a GE Advance tomograph (Milwaukee, Wisconsin).

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Acknowledgements

This work was supported in part by Grant CA 39566 from the National Cancer Institute.

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Correspondence to Anthony F. Shields.

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Shields, A., Grierson, J., Dohmen, B. et al. Imaging proliferation in vivo with [F-18]FLT and positron emission tomography. Nat Med 4, 1334–1336 (1998). https://doi.org/10.1038/3337

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