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- W4236149744 abstract "Platelets are the key to thrombus formation in atherothrombosis and play a major role in plaque rupture. Non-invasive imaging of activated platelets would be of great clinical interest. Here, we evaluate the ability of a magnetic resonance imaging (MRI) contrast agent consisting of microparticles of iron oxide (MPIO) and a single-chain antibody targeting ligand-induced binding sites (LIBS) on activated GPIIb/IIIa to image carotid artery thrombosis and. Anti-LIBS or control antibody were conjugated to 1μm-sized MPIOs (LIBS-MPIO/control-MPIO). Non-occlusive wall-adherent thrombi were induced in BL/6 mice using 6% ferric chloride. MRI (at 9.4 Tesla) of the carotid artery was performed once before (figure , A) and repeatedly in 12min long sequences after LIBS-MPIO/control-MPIO injection. After 36min, a significant signal void, which is the typical effect of iron oxide-based contrast agents, was observed with LIBS-MPIO (figure , B), but not control-MPIO (P<0.01) and corresponded to LIBS-MPIO binding as confirmed by histology. After thrombolysis, in LIBS-MPIO injected mice the signal void subsided, indicating successful thrombolysis (figure , C). On histology, MPIO-content of thrombus, as well as thrombus size, correlated significantly with LIBS-MPIO-induced signal void (both P<0.01). LIBS-MPIO allows in vivo MRI of activated platelets with excellent contrast properties and monitoring of thrombolytic therapy. This approach represents a novel non-invasive technique allowing rapid detection and quantification of platelet-containing thrombi, such as found on the surface of ruptured atherosclerotic plaques." @default.
- W4236149744 created "2022-05-12" @default.
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- W4236149744 date "2008-10-28" @default.
- W4236149744 modified "2023-10-14" @default.
- W4236149744 title "Abstract 1935: A Magnetic Resonance Imaging Contrast Agent Targeted Towards Activated Platelets Allows In Vivo Detection of Thrombosis and Monitoring of Thrombolysis" @default.
- W4236149744 doi "https://doi.org/10.1161/circ.118.suppl_18.s_407-c" @default.
- W4236149744 hasPublicationYear "2008" @default.
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