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CD80 Is Upregulated in a Mouse Model with Shear Stress-Induced Atherosclerosis and Allows for Evaluating CD80-Targeting PET Tracers


Meletta, Romana; Steier, Larissa; Borel, Nicole; Mu, Linjing; Keller, Claudia; Chiotellis, Aristeidis; Russo, Erica; Halin, Cornelia; Ametamey, Simon M; Schibli, Roger; Krämer, Stefanie D; Müller Herde, Adrienne (2017). CD80 Is Upregulated in a Mouse Model with Shear Stress-Induced Atherosclerosis and Allows for Evaluating CD80-Targeting PET Tracers. Molecular Imaging and Biology, 19(1):90-99.

Abstract

Purpose: A shear stress-induced atherosclerosismouse model was characterized for its expression of inflammation markers with focus on CD80. With this model, we evaluated two positron emission tomography (PET) radiotracers targeting CD80 as well as 2-deoxy-2-[18F]fluoro-D-mannose ([18F]FDM) in comparison with 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG). Procedure: A flow constrictive cuff implanted around the common carotid artery in apolipoprotein E knockout mice resulted in plaque formation. CD80 expression levels and plaque histopathology were evaluated. Serial PET/X-ray computed tomography scans were performed to follow inflammation. Results: Plaque formation with increased levels of CD80 was observed. Histologically, plaques presented macrophage-rich and large necrotic areas covered by a thin fibrous cap. Of the CD80- specific tracers, one displayed an increased uptake in plaques by PET. Both [18F]FDG and [18F]FDM accumulated in atherosclerotic plaques. Conclusion: This mousemodel presented, similar to humans, an increased expression of CD80 which renders it suitable for non-invasively targeting CD80-positive immune cells and evaluating CD80- specific radiotracers.

Abstract

Purpose: A shear stress-induced atherosclerosismouse model was characterized for its expression of inflammation markers with focus on CD80. With this model, we evaluated two positron emission tomography (PET) radiotracers targeting CD80 as well as 2-deoxy-2-[18F]fluoro-D-mannose ([18F]FDM) in comparison with 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG). Procedure: A flow constrictive cuff implanted around the common carotid artery in apolipoprotein E knockout mice resulted in plaque formation. CD80 expression levels and plaque histopathology were evaluated. Serial PET/X-ray computed tomography scans were performed to follow inflammation. Results: Plaque formation with increased levels of CD80 was observed. Histologically, plaques presented macrophage-rich and large necrotic areas covered by a thin fibrous cap. Of the CD80- specific tracers, one displayed an increased uptake in plaques by PET. Both [18F]FDG and [18F]FDM accumulated in atherosclerotic plaques. Conclusion: This mousemodel presented, similar to humans, an increased expression of CD80 which renders it suitable for non-invasively targeting CD80-positive immune cells and evaluating CD80- specific radiotracers.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Nuclear Medicine
05 Vetsuisse Faculty > Institute of Veterinary Pathology
Dewey Decimal Classification:570 Life sciences; biology
Language:English
Date:2017
Deposited On:10 Nov 2016 10:23
Last Modified:18 Jul 2017 00:00
Publisher:Springer
ISSN:1536-1632
Publisher DOI:https://doi.org/10.1007/s11307-016-0987-0

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