Alauddin MM, Shahinian A, Park R, Tohme M, Fissekis JD, Conti PS. Biodistribution and PET imaging of [(18)F]-fluoroadenosine derivatives.
Nucl Med Biol 2007;
34:267-72. [PMID:
17383576 PMCID:
PMC1905838 DOI:
10.1016/j.nucmedbio.2006.12.009]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2006] [Accepted: 12/25/2006] [Indexed: 01/15/2023]
Abstract
INTRODUCTION
Many fluorinated analogues of adenosine nucleoside have been synthesized and studied as potential antitumor and antiviral agents. Earlier, we reported radiosynthesis of 2'-deoxy-2'-[(18)F]fluoro-1-beta-D-arabinofuranosyl-adenine ([(18)F]-FAA) and 3'-deoxy-3'-[(18)F]fluoro-1-beta-d-xylofuranosyl-adenine ([(18)F]FXA). Now, we report their in vivo studies including blood clearance, biodistribution and micro-PET imaging in tumor-bearing nude mice.
METHODS
Tumors were grown in 6-week-old athymic nude mice (Harlan, Indianapolis, IN, USA) by inoculation of HT-29 cells, wild-type cells in the left flank and transduced cells with HSV-tk on the right flank. When the tumor was about 1 cm in size, animals were injected with these radiotracers for in vivo studies, including blood clearance, micro-PET imaging and biodistribution.
RESULTS
Uptake of [(18)F]FAA in tumor was 3.3-fold higher than blood, with highest uptake in the spleen. Maximum uptake of [(18)F]FXA was observed in the heart compared to other organs. There was no tumor uptake of [(18)F]FXA. Biodistribution results were supported by micro-PET images, which also showed very high uptake of [(18)F]FAA in spleen and visualization of tumors, and high uptake of [(18)F]FXA in the heart.
CONCLUSION
These results suggest that [(18)F]FAA may be useful for tumor imaging, while [(18)F]FXA may have potential as a heart imaging agent with PET.
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