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Vinegoni, C.* ; Botnaru, I.* ; Aikawa, E.* ; Calfon, M.A.* ; Iwamoto, Y.* ; Folco, E.J.* ; Ntziachristos, V. ; Weissleder, R.* ; Libby, P.* ; Jaffer, F.A.

Indocyanine green enables near-infrared fluorescence imaging of lipid-rich, inflamed atherosclerotic plaques.

Sci. Transl. Med. 3:84ra85 (2011)
DOI
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
New high-resolution molecular and structural imaging strategies are needed to visualize high-risk plaques that are likely to cause acute myocardial infarction, because current diagnostic methods do not reliably identify at-risk subjects. Although molecular imaging agents are available for low-resolution detection of atherosclerosis in large arteries, a lack of imaging agents coupled to high-resolution modalities has limited molecular imaging of atherosclerosis in the smaller coronary arteries. Here, we have demonstrated that indocyanine green (ICG), a Food and Drug Administration-approved near-infrared fluorescence (NIRF)-emitting compound, targets atheromas within 20 min of injection and provides sufficient signal enhancement for in vivo detection of lipid-rich, inflamed, coronary-sized plaques in atherosclerotic rabbits. In vivo NIRF sensing was achieved with an intravascular wire in the aorta, a vessel of comparable caliber to human coronary arteries. Ex vivo fluorescence reflectance imaging showed high plaque target-to-background ratios in atheroma-bearing rabbits injected with ICG compared to atheroma-bearing rabbits injected with saline. In vitro studies using human macrophages established that ICG preferentially targets lipid-loaded macrophages. In an early clinical study of human atheroma specimens from four patients, we found that ICG colocalized with plaque macrophages and lipids. The atheroma-targeting capability of ICG has the potential to accelerate the clinical development of NIRF molecular imaging of high-risk plaques in humans.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter no keywords
ISSN (print) / ISBN 1946-6234
e-ISSN 1946-6242
Quellenangaben Band: 3, Heft: 84, Seiten: , Artikelnummer: 84ra85 Supplement: ,
Verlag American Association for the Advancement of Science (AAAS)
Begutachtungsstatus Peer reviewed