Abstract | PURPOSE: The purpose of the study was to validate [18F] DPA-714, a translocator protein (TSPO) 18 kDa radioligand, as a probe to non-invasively quantify the inflammatory state in inflammatory bowel disease (IBD) animal models. PROCEDURES: RESULTS: The level of inflammation was analyzed using PET imaging on days 7 and 8. The analysis obtained with [18F] DPA-714, yielded a significant difference between the DSS treated (0.50 ± 0.17%ID/cc) and non-treated rats (0.35 ± 0.15%ID/cc). [18F]FDG on the other hand did not yield a significant difference. We did observe a mean glucose consumption in the colon increase from 0.40 ± 0.11 %ID/cc to 0.54 ± 0.17 %ID/cc. In the TNBS model, the uptake level of [18 F] DPA-714 increased significantly from 0.46 ± 0.23%ID/cc for the non-treated group, to 1.30 ± 0.62%ID/cc for those treated. PET signal was correlated with increased TSPO expression at cellular level. CONCLUSIONS: Results indicate that [18F] DPA-714 is suitable for studying inflammation in IBD models. [18F] DPA-714 could be a good molecular probe to non-invasively evaluate the level and localization of inflammation. Moreover, in vivo imaging using this TSPO ligand is potentially a powerful tool to stage and certainly to follow the evolution and therapeutic efficiency at molecular level within this disease family.
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Authors | Nicholas Bernards, Géraldine Pottier, Benoit Thézé, Frédéric Dollé, Raphael Boisgard |
Journal | Molecular imaging and biology
(Mol Imaging Biol)
Vol. 17
Issue 1
Pg. 67-75
(Feb 2015)
ISSN: 1860-2002 [Electronic] United States |
PMID | 25015387
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Fluorine Radioisotopes
- Ligands
- N,N-diethyl-2-(2-(4-(2-fluoroethoxy)phenyl)-5,7-dimethylpyrazolo(1,5-a)pyrimidin-3-yl)acetamide
- Pyrazoles
- Pyrimidines
- Fluorodeoxyglucose F18
- Trinitrobenzenesulfonic Acid
- Dextran Sulfate
- Glucose
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Topics |
- Animals
- Colon
(diagnostic imaging, pathology)
- Dextran Sulfate
(chemistry)
- Fluorine Radioisotopes
(chemistry)
- Fluorodeoxyglucose F18
- Gamma Rays
- Glucose
(chemistry)
- Image Processing, Computer-Assisted
- Immunohistochemistry
- Inflammation
- Inflammatory Bowel Diseases
(diagnostic imaging)
- Ligands
- Male
- Positron-Emission Tomography
- Pyrazoles
(chemistry)
- Pyrimidines
(chemistry)
- Rats
- Rats, Wistar
- Trinitrobenzenesulfonic Acid
(chemistry)
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