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Nucl Med Biol. 2003 Jan;30(1):25-30.

Imaging [18F]FAU [1-(2'-deoxy-2'-fluoro-beta-D-arabinofuranosyl) uracil] in dogs.

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Karmanos Cancer Institute, Department of Medicine, Wayne State University, Detroit Medical Center, Detroit, Michigan, USA.


We have studied the biodistribution of [(18)F]FAU [(1-(2'-deoxy-2'-fluoro-beta-D-arabinofuranosyl)uracil], which previous work has shown is incorporated into DNA and functions as an inhibitor of DNA synthesis. It is being tested as a potential antineoplastic agent and imaging agent for PET. We have produced [(18)F]FAU and injected the tracer into 3 normal dogs and imaged them for up to 4 hours and removed tissues along with blood and urine samples for HPLC and activity analysis. The results showed that [(18)F]FAU evenly distributed to most of organs. In sharp contrast to our prior experience with thymidine and its analogs, marrow had less retention of [(18)F]FAU than the non-proliferating tissues.

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