Document Detail

MRI of coronary wall remodeling in a swine model of coronary injury using an elastin-binding contrast agent.
MedLine Citation:
PMID:  21378029     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The extracellular matrix (ECM) plays an important role in the pathogenesis of atherosclerosis and in-stent restenosis. Elastin is an essential component of the ECM. ECM degradation can lead to plaque destabilization, whereas enhanced synthesis typically leads to vessel wall remodeling resulting in arterial stenosis or in-stent restenosis after stent implantation. The objective of this study was to demonstrate the feasibility of MRI of vascular remodeling using a novel elastin-binding contrast agent (BMS-753951).
METHODS AND RESULTS: Coronary injury was induced in 6 pigs by endothelial denudation and stent placement. At day 28, delayed-enhancement MRI coronary vessel wall imaging was performed before and after injection of gadolinium-diethylene triamine pentaacetic acid (Gd-DTPA). Two days later, DE-MRI was repeated after administration of BMS-753951. Contrast-to-noise-ratio and areas of enhancement were determined. Delayed-enhancement MRI with BMS-753951 caused strong enhancement of the aortic, pulmonary artery, and injured coronary artery walls, whereas Gd-DTPA did not. Delayed-enhancement MRI of the stented coronary artery with BMS-753951 yielded a 3-fold higher contrast-to-noise-ratio when compared with the balloon-injured and control coronary artery (21±6 versus 7±3 versus 6±4; P<0.001). The area of enhancement correlated well with the area of remodeling obtained from histological data (R(2)=0.86, P<0.05).
CONCLUSIONS: We demonstrate the noninvasive detection and quantification of vascular remodeling in an animal model of coronary vessel wall injury using an elastin-specific MR contrast agent. This novel approach may be useful for the assessment of coronary vessel wall remodeling in patients with suspected coronary artery disease. Further studies in atherosclerotic animal models and degenerative ECM disease are now warranted.
Christian von Bary; Marcus Makowski; Anne Preissel; Alexandra Keithahn; Alice Warley; Elmar Spuentrup; Arno Buecker; Joel Lazewatsky; Richard Cesati; David Onthank; Nikolaus Schickl; Sylvia Schachoff; Jörg Hausleiter; Albert Schömig; Markus Schwaiger; Simon Robinson; René Botnar
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-03-04
Journal Detail:
Title:  Circulation. Cardiovascular imaging     Volume:  4     ISSN:  1942-0080     ISO Abbreviation:  Circ Cardiovasc Imaging     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-03-16     Completed Date:  2011-05-19     Revised Date:  2011-09-06    
Medline Journal Info:
Nlm Unique ID:  101479935     Medline TA:  Circ Cardiovasc Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  147-55     Citation Subset:  IM    
Klinik und Poliklinik für Innere Medizin II, Universitätsklinikum Regensburg, Franz-Josef-Strauss-Allee 11, Regensburg, Germany.
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MeSH Terms
Angioplasty, Balloon, Coronary / adverse effects,  instrumentation
Contrast Media / diagnostic use*,  metabolism
Coronary Angiography
Coronary Restenosis / etiology,  metabolism,  pathology*
Coronary Vessels / injuries,  metabolism,  pathology*
Disease Models, Animal
Elastin / metabolism*
Feasibility Studies
Gadolinium DTPA / diagnostic use
Heart Injuries / etiology,  metabolism,  pathology*
Magnetic Resonance Imaging*
Predictive Value of Tests
Time Factors
Vascular System Injuries / etiology,  metabolism,  pathology*
Reg. No./Substance:
0/Contrast Media; 80529-93-7/Gadolinium DTPA; 9007-58-3/Elastin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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