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Evaluation of 5-[ 18 F]fluoro-2'-deoxycytidine as a tumor imaging agent: A comparison of [ 18 F]FdUrd, [ 18 F]FLT and [ 18 F]FDG.
- Source :
-
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2019 Jun; Vol. 148, pp. 152-159. Date of Electronic Publication: 2019 Mar 27. - Publication Year :
- 2019
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Abstract
- One of the hallmarks of cancer is increased cell proliferation. Measurements of cell proliferation by estimation of DNA synthesis with several radiolabeled nucleosides have been tested to assess tumor growth. Deoxycytidine can be phosphorylated by deoxycytidine kinase (dCK) and is incorporated into DNA. This study evaluated a radiofluorinated deoxycytidine analog, 5-[ <superscript>18</superscript> F]fluoro-2'-deoxycytidine ([ <superscript>18</superscript> F]FdCyd), as a proliferation probe and compared it with 5-[ <superscript>18</superscript> F]fluoro-2'-deoxyuridine ([ <superscript>18</superscript> F]FdUrd), 3'-deoxy-3'-[ <superscript>18</superscript> F]fluorothymidine ([ <superscript>18</superscript> F]FLT), and [ <superscript>18</superscript> F]fluorodeoxyglucose ([ <superscript>18</superscript> F]FDG) in a tumor-bearing mouse model. [ <superscript>18</superscript> F]FdCyd was synthesized from two precursors by direct electrophilic substitution. The serum stability and partition coefficient of [ <superscript>18</superscript> F]FdCyd were evaluated in vitro. Positron emission topography (PET) imaging of Lewis lung carcinoma (LLC)-bearing mice with [ <superscript>18</superscript> F]FdCyd, [ <superscript>18</superscript> F]FdUrd, [ <superscript>18</superscript> F]FLT, and [ <superscript>18</superscript> F]FDG were evaluated. [ <superscript>18</superscript> F]FdCyd was stable in mouse serum and normal saline for up to 4 h. With all radiotracers except [ <superscript>18</superscript> F]FLT, PET can clearly delineate the tumor lesion. [ <superscript>18</superscript> F]FdCyd and [ <superscript>18</superscript> F]FdUrd showed high accumulation in the liver and kidney. The SUV and tumor-to-muscle (T/M) ratios derived from PET imaging of the radiotracers were [ <superscript>18</superscript> F]FDG > [ <superscript>18</superscript> F]FdCyd > [ <superscript>18</superscript> F]FdUrd > [ <superscript>18</superscript> F]FLT. Selective retention in tumors with a favorable tumor/muscle ratio makes [ <superscript>18</superscript> F]FdCyd a protential candidate for further investigation as a proliferation imaging agent.<br /> (Copyright © 2019 Elsevier Ltd. All rights reserved.)
- Subjects :
- Animals
Cell Line, Tumor
Deoxycytidine administration & dosage
Deoxycytidine blood
Deoxycytidine pharmacokinetics
Floxuridine pharmacokinetics
Fluorodeoxyglucose F18 pharmacokinetics
Heterografts
Male
Mice
Mice, Inbred C57BL
Positron-Emission Tomography methods
Radiopharmaceuticals pharmacokinetics
Tissue Distribution
Deoxycytidine analogs & derivatives
Floxuridine administration & dosage
Fluorodeoxyglucose F18 administration & dosage
Radiopharmaceuticals administration & dosage
Subjects
Details
- Language :
- English
- ISSN :
- 1872-9800
- Volume :
- 148
- Database :
- MEDLINE
- Journal :
- Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
- Publication Type :
- Academic Journal
- Accession number :
- 30959352
- Full Text :
- https://doi.org/10.1016/j.apradiso.2019.03.034