Yes / Non-invasive imaging methods are required to monitor the inflammatory content of atherosclerotic plaques. FEDAA1106 (N-(5-fluoro-2-phenoxyphenyl)-N-(2-(2-fluoroethoxy)-5- methoxybenzyl) acetamide) is a selective ligand for TSPO-18kDa (also known as peripheral benzodiazepine receptor), which is expressed by activated macrophages. We compared 18F- FEDAA1106 and 18F-FDG (a marker of glucose metabolism) for PET imaging of vascular
inflammation. This was tested using a murine model where focal inflammation was induced in the carotid artery via placement of a constrictive cuff. Immunostaining revealed CD68-positive cells (macrophages) at a disturbed flow site located downstream from the cuff. Dynamic PET imaging using 18F-FEDAA1106 or 18F-FDG was registered to anatomical data generated by CT/CT angiography. Standardized uptake values (SUV) were significantly increased at cuffed compared to contralateral arteries using either 18F-FEDAA1106 (p<0.01) or FDG (p<0.05).
However, the 18F-FEDAA1106 signal was significantly higher at the inflamed disturbed flow
region compared to the non-inflamed uniform flow regions, whereas differences in FDG uptake were less distinct. We conclude that 18F-FEDAA1106 can be used in vivo for detection of vascular inflammation. Moreover, the signal pattern of 18F-FEDAA1106 correlated with vascular inflammation more specifically than FDG uptake. / : This study was funded by the British Heart Foundation and through a grant from the Swiss National Science Foundation (310030_143343/1 to B.R.K.)
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/10331 |
| Date | 08 1900 |
| Creators | Cuhlmann, S., Gsell, W., Van der Heiden, K., Habib, J., Tremoleda, J.L., Khalil, M., Turkheimer, F., Meens, M.J., Kwak, B.R., Bird, Joseph, Davenport, A.P., Clark, J., Haskard, D., Krams, R., Jones, H., Evans, P.C. |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Article, Published version |
| Rights | © 2014 Decker Intellectual Properties. This is an Open Access article published under the Creative Commons CC-BY license (http://creativecommons.org/licenses/by/3.0/). |
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